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<h3>

Vladislav Zavialov pushed to branch wip/negative-literals

at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>

</h3>

<h4>

Commits:

</h4>

<ul>

<li>

<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/5ccd97796a5963a6087dd81e2b519f70a3bf16cc">5ccd9779</a></strong>

<div>

<span>by Vladislav Zavialov</span>

<i>at 2020-07-23T22:10:23+03:00</i>

</div>

<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Improve NegativeLiterals (#18022, GHC Proposal #344)

Before this patch, NegativeLiterals used to parse x-1 as x (-1).

This may not be what the user expects, and now it is fixed:

x-1 is parsed as (-) x 1.

We achieve this by the following requirement:

  * When lexing a negative literal,

    it must not be preceded by a 'closing token'.

This also applies to unboxed literals, e.g. -1#.

See GHC Proposal #229 for the definition of a closing token.

A nice consequence of this change is that -XNegativeLiterals becomes a

subset of -XLexicalNegation. In other words, enabling both of those

extensions has the same effect as enabling -XLexicalNegation alone.

</pre>

</li>

</ul>

<h4>7 changed files:</h4>

<ul>

<li class="file-stats">

<a href="#a1ae0a1be35c859d90b0756920a7198075fb91e1">

compiler/GHC/Parser/Lexer.x

</a>

</li>

<li class="file-stats">

<a href="#b421960e854c6cfa1e4ca830bd6a5fc6eef91168">

docs/users_guide/8.12.1-notes.rst

</a>

</li>

<li class="file-stats">

<a href="#afc5c9567f619749d27f89c5904b2eb41814069c">

docs/users_guide/exts/negative_literals.rst

</a>

</li>

<li class="file-stats">

<a href="#b800f96dc5df3e1c1ad35199012912cd86e63cd9">

<span class="deleted-file">

−

testsuite/tests/parser/should_compile/LexNegVsNegLit.hs

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<li class="file-stats">

<a href="#04eff5dcb285b3a606ab496f176ef502f171f133">

<span class="new-file">

+

testsuite/tests/parser/should_compile/NegativeLiterals.hs

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<a href="#8aabc635237173c8209944a56d18d2a07e0dae7f">

<span class="new-file">

+

testsuite/tests/parser/should_compile/NegativeLiteralsNoExt.hs

</span>

</a>

</li>

<li class="file-stats">

<a href="#a43397658ba43ce6747320867b3a0330bcea2ea5">

testsuite/tests/parser/should_compile/all.T

</a>

</li>

</ul>

<h4>Changes:</h4>

<li id="a1ae0a1be35c859d90b0756920a7198075fb91e1">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/5ccd97796a5963a6087dd81e2b519f70a3bf16cc#a1ae0a1be35c859d90b0756920a7198075fb91e1"><strong>compiler/GHC/Parser/Lexer.x</strong></a>

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<pre style="margin: 0;"> <span id="LC199" class="line" lang="plaintext">-- normal signed numerical literals can only be explicitly negative,</span>

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<pre style="margin: 0;"> <span id="LC200" class="line" lang="plaintext">-- not explicitly positive (contrast @exponent)</span>

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<pre style="margin: 0;"> <span id="LC201" class="line" lang="plaintext">@negative = \-</span>

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<pre style="margin: 0;">-<span id="LC202" class="line" lang="plaintext">@signed = @negative ?</span>

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<pre style="margin: 0;"> <span id="LC202" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC203" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC204" class="line" lang="plaintext">-- -----------------------------------------------------------------------------</span>

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<pre style="margin: 0;"> <span id="LC530" class="line" lang="plaintext">                                           ifExtension BinaryLiteralsBit }   { tok_primint positive 2 3 binary }</span>

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<pre style="margin: 0;"> <span id="LC531" class="line" lang="plaintext">  0[oO] @numspc @octal              \# / { ifExtension MagicHashBit }        { tok_primint positive 2 3 octal }</span>

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<pre style="margin: 0;"> <span id="LC532" class="line" lang="plaintext">  0[xX] @numspc @hexadecimal        \# / { ifExtension MagicHashBit }        { tok_primint positive 2 3 hexadecimal }</span>

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<pre style="margin: 0;">-<span id="LC534" class="line" lang="plaintext">  @negative @decimal                \# / { <span class="idiff left right">ifExtension MagicHashBit }</span>        { tok_primint negative 1 2 decimal }</span>

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<pre style="margin: 0;">-<span id="LC535" class="line" lang="plaintext">  @negative 0[bB] @numspc @binary   \# / { <span class="idiff left right">ifExtension MagicHashBit</span> `alexAndPred`</span>

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<pre style="margin: 0;">+<span id="LC533" class="line" lang="plaintext">  @negative @decimal                \# / { <span class="idiff left right">negHashLitPred }          </span>        { tok_primint negative 1 2 decimal }</span>

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<pre style="margin: 0;">+<span id="LC534" class="line" lang="plaintext">  @negative 0[bB] @numspc @binary   \# / { <span class="idiff left right">negHashLitPred</span> `alexAndPred`</span>

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<pre style="margin: 0;"> <span id="LC535" class="line" lang="plaintext">                                           ifExtension BinaryLiteralsBit }   { tok_primint negative 3 4 binary }</span>

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<pre style="margin: 0;">-<span id="LC537" class="line" lang="plaintext">  @negative 0[oO] @numspc @octal    \# / { <span class="idiff left right">ifExtension MagicHashBit }</span>        { tok_primint negative 3 4 octal }</span>

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<pre style="margin: 0;">+<span id="LC536" class="line" lang="plaintext">  @negative 0[oO] @numspc @octal    \# / { <span class="idiff left right">negHashLitPred }          </span>        { tok_primint negative 3 4 octal }</span>

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<pre style="margin: 0;"> <span id="LC537" class="line" lang="plaintext">  @negative 0[xX] @numspc @hexadecimal \#</span>

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<pre style="margin: 0;">-<span id="LC539" class="line" lang="plaintext">                                       / { <span class="idiff left right">ifExtension MagicHashBit }</span>        { tok_primint negative 3 4 hexadecimal }</span>

</pre>

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<pre style="margin: 0;">+<span id="LC538" class="line" lang="plaintext">                                       / { <span class="idiff left right">negHashLitPred }          </span>        { tok_primint negative 3 4 hexadecimal }</span>

</pre>

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<pre style="margin: 0;"> <span id="LC539" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC540" class="line" lang="plaintext">  @decimal                       \# \# / { ifExtension MagicHashBit }        { tok_primword 0 2 decimal }</span>

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<pre style="margin: 0;"> <span id="LC541" class="line" lang="plaintext">  0[bB] @numspc @binary          \# \# / { ifExtension MagicHashBit `alexAndPred`</span>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -546,8 +545,11 @@ $tab          { warnTab }</td>

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<pre style="margin: 0;"> <span id="LC545" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC546" class="line" lang="plaintext">  -- Unboxed floats and doubles (:: Float#, :: Double#)</span>

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<pre style="margin: 0;"> <span id="LC547" class="line" lang="plaintext">  -- prim_{float,double} work with signed literals</span>

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<pre style="margin: 0;">-<span id="LC549" class="line" lang="plaintext">  @signed @floating_point           \# / { ifExtension MagicHashBit }        { tok_frac 1 tok_primfloat }</span>

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<pre style="margin: 0;">-<span id="LC550" class="line" lang="plaintext">  @signed @floating_point        \# \# / { ifExtension MagicHashBit }        { tok_frac 2 tok_primdouble }</span>

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<pre style="margin: 0;">+<span id="LC548" class="line" lang="plaintext">  @floating_point                  \# / { ifExtension MagicHashBit }        { tok_frac 1 tok_primfloat }</span>

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<pre style="margin: 0;">+<span id="LC549" class="line" lang="plaintext">  @floating_point               \# \# / { ifExtension MagicHashBit }        { tok_frac 2 tok_primdouble }</span>

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<pre style="margin: 0;">+<span id="LC550" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">+<span id="LC551" class="line" lang="plaintext">  @negative @floating_point        \# / { negHashLitPred }                  { tok_frac 1 tok_primfloat }</span>

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<pre style="margin: 0;">+<span id="LC552" class="line" lang="plaintext">  @negative @floating_point     \# \# / { negHashLitPred }                  { tok_frac 2 tok_primdouble }</span>

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<pre style="margin: 0;"> <span id="LC553" class="line" lang="plaintext">}</span>

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<pre style="margin: 0;"> <span id="LC554" class="line" lang="plaintext"></span>

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555

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<pre style="margin: 0;"> <span id="LC555" class="line" lang="plaintext">-- Strings and chars are lexed by hand-written code.  The reason is</span>

</pre>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1192" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1194" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1192,8 +1194,8 @@ atEOL _ _ _ (AI _ buf) = atEnd buf || currentChar buf == '\n'</td>

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1192

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<td class="diff-line-num new_line" data-linenumber="1194" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1194

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<pre style="margin: 0;"> <span id="LC1194" class="line" lang="plaintext">-- Check if we should parse a negative literal (e.g. -123) as a single token.</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1193" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1193

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<td class="diff-line-num new_line" data-linenumber="1195" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1195

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<pre style="margin: 0;"> <span id="LC1195" class="line" lang="plaintext">negLitPred :: AlexAccPred ExtsBitmap</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1194" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1194

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<td class="diff-line-num new_line" data-linenumber="1196" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1196

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<pre style="margin: 0;"> <span id="LC1196" class="line" lang="plaintext">negLitPred =</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1195" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1195

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<td class="diff-line-num new_line old" data-linenumber="1197" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1195" class="line" lang="plaintext">    <span class="idiff left right">negative_literals `alexOr</span>Pred`</span>

</pre>

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<td class="diff-line-num old old_line" data-linenumber="1196" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1196

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<td class="diff-line-num new_line old" data-linenumber="1197" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1196" class="line" lang="plaintext">    (<span class="idiff left right">lexical_negation `alexAndPred` prefix_minus</span>)</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1197" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="1197" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1197

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<pre style="margin: 0;">+<span id="LC1197" class="line" lang="plaintext">    <span class="idiff left right">prefix_minus `alexAnd</span>Pred`</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1197" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="1198" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1198

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<pre style="margin: 0;">+<span id="LC1198" class="line" lang="plaintext">    (<span class="idiff left right">negative_literals `alexOrPred` lexical_negation</span>)</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1197" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1197

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<td class="diff-line-num new_line" data-linenumber="1199" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1199

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<pre style="margin: 0;"> <span id="LC1199" class="line" lang="plaintext">  where</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1198" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1198

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<td class="diff-line-num new_line" data-linenumber="1200" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1200

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<pre style="margin: 0;"> <span id="LC1200" class="line" lang="plaintext">    negative_literals = ifExtension NegativeLiteralsBit</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1199" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1199

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<td class="diff-line-num new_line" data-linenumber="1201" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1201

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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1201" class="line" lang="plaintext"></span>

</pre>

</td>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="1202" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="1204" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -1202,14 +1204,33 @@ negLitPred =</td>

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<td class="diff-line-num old_line" data-linenumber="1202" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1202

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<td class="diff-line-num new_line" data-linenumber="1204" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1204

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<pre style="margin: 0;"> <span id="LC1204" class="line" lang="plaintext">      alexNotPred (ifExtension NoLexicalNegationBit)</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1203" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1203

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<td class="diff-line-num new_line" data-linenumber="1205" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1205

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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1205" class="line" lang="plaintext"></span>

</pre>

</td>

</tr>

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<td class="diff-line-num old_line" data-linenumber="1204" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1204

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<td class="diff-line-num new_line" data-linenumber="1206" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1206

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<pre style="margin: 0;"> <span id="LC1206" class="line" lang="plaintext">    prefix_minus =</span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1205" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1205

</td>

<td class="diff-line-num new_line old" data-linenumber="1207" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1205" class="line" lang="plaintext">      -- The condition for a prefix occurrence of an operator is:</span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1206" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1206

</td>

<td class="diff-line-num new_line old" data-linenumber="1207" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1206" class="line" lang="plaintext">      --</span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1207" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1207

</td>

<td class="diff-line-num new_line old" data-linenumber="1207" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1207" class="line" lang="plaintext">      --   not precededByClosingToken && followedByOpeningToken</span>

</pre>

</td>

</tr>

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<td class="diff-line-num old old_line" data-linenumber="1208" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1208

</td>

<td class="diff-line-num new_line old" data-linenumber="1207" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1208" class="line" lang="plaintext">      --</span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1209" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1209

</td>

<td class="diff-line-num new_line old" data-linenumber="1207" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1209" class="line" lang="plaintext">      -- but we don't check followedByOpeningToken here as it holds</span>

</pre>

</td>

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<td class="diff-line-num old old_line" data-linenumber="1210" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

1210

</td>

<td class="diff-line-num new_line old" data-linenumber="1207" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #fac5cd; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#f9d7dc">

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<pre style="margin: 0;">-<span id="LC1210" class="line" lang="plaintext">      -- simply because we immediately lex a literal after the minus.</span>

</pre>

</td>

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</td>

<td class="diff-line-num new new_line" data-linenumber="1207" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1207

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<pre style="margin: 0;">+<span id="LC1207" class="line" lang="plaintext">      -- Note [prefix_minus in negLitPred and negHashLitPred]</span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1211" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1208" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1208

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<pre style="margin: 0;">+<span id="LC1208" class="line" lang="plaintext">      alexNotPred precededByClosingToken</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1211" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1209" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1209

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<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1209" class="line" lang="plaintext"></span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1211" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1210" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1210

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<pre style="margin: 0;">+<span id="LC1210" class="line" lang="plaintext">-- Check if we should parse an unboxed negative literal (e.g. -123#) as a single token.</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1211" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1211" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1211

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<pre style="margin: 0;">+<span id="LC1211" class="line" lang="plaintext">negHashLitPred :: AlexAccPred ExtsBitmap</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1211" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1212" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1212

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<pre style="margin: 0;">+<span id="LC1212" class="line" lang="plaintext">negHashLitPred = prefix_minus `alexAndPred` magic_hash</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1211" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1213" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1213

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<pre style="margin: 0;">+<span id="LC1213" class="line" lang="plaintext">  where</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1211" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1214" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1214

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<pre style="margin: 0;">+<span id="LC1214" class="line" lang="plaintext">    magic_hash = ifExtension MagicHashBit</span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="1211" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1215" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1215

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<pre style="margin: 0;">+<span id="LC1215" class="line" lang="plaintext">    prefix_minus =</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1211" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="1216" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1216

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<pre style="margin: 0;">+<span id="LC1216" class="line" lang="plaintext">      -- Note [prefix_minus in negLitPred and negHashLitPred]</span>

</pre>

</td>

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<td class="diff-line-num old_line" data-linenumber="1211" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1211

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<td class="diff-line-num new_line" data-linenumber="1217" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1217

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<pre style="margin: 0;"> <span id="LC1217" class="line" lang="plaintext">      alexNotPred precededByClosingToken</span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="1212" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1212

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<td class="diff-line-num new_line" data-linenumber="1218" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

1218

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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">

<pre style="margin: 0;"> <span id="LC1218" class="line" lang="plaintext"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1213" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="1219" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1219

</td>

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<pre style="margin: 0;">+<span id="LC1219" class="line" lang="plaintext">{- Note [prefix_minus in negLitPred and negHashLitPred]</span>

</pre>

</td>

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<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1213" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1220" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1220

</td>

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<pre style="margin: 0;">+<span id="LC1220" class="line" lang="plaintext">~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="1213" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1221" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1221

</td>

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<pre style="margin: 0;">+<span id="LC1221" class="line" lang="plaintext">We want to parse -1 as a single token, but x-1 as three tokens.</span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1213" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1222" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1222

</td>

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<pre style="margin: 0;">+<span id="LC1222" class="line" lang="plaintext">So in negLitPred (and negHashLitPred) we require that we have a prefix</span>

</pre>

</td>

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<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1213" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1223" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1223

</td>

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<pre style="margin: 0;">+<span id="LC1223" class="line" lang="plaintext">occurrence of the minus sign. See Note [Whitespace-sensitive operator parsing]</span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1213" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1224" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1224

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1224" class="line" lang="plaintext">for a detailed definition of a prefix occurrence.</span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1213" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1225" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1225

</td>

<td class="line_content new" style="padding-left: 0.5em; padding-right: 0.5em;" bgcolor="#ecfdf0">

<pre style="margin: 0;">+<span id="LC1225" class="line" lang="plaintext"></span>

</pre>

</td>

</tr>

<tr class="line_holder new" id="" style="line-height: 1.6;">

<td class="diff-line-num new old_line" data-linenumber="1213" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1226" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1226

</td>

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<pre style="margin: 0;">+<span id="LC1226" class="line" lang="plaintext">The condition for a prefix occurrence of an operator is:</span>

</pre>

</td>

</tr>

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<td class="diff-line-num new old_line" data-linenumber="1213" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="1227" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

1227

</td>

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<pre style="margin: 0;">+<span id="LC1227" class="line" lang="plaintext"></span>

</pre>

</td>

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<pre style="margin: 0;">+<span id="LC1228" class="line" lang="plaintext">  not precededByClosingToken && followedByOpeningToken</span>

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<pre style="margin: 0;">+<span id="LC1229" class="line" lang="plaintext"></span>

</pre>

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<pre style="margin: 0;">+<span id="LC1230" class="line" lang="plaintext">but we don't check followedByOpeningToken when parsing a negative literal.</span>

</pre>

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<pre style="margin: 0;">+<span id="LC1231" class="line" lang="plaintext">It holds simply because we immediately lex a literal after the minus.</span>

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<pre style="margin: 0;">+<span id="LC1232" class="line" lang="plaintext">-}</span>

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<pre style="margin: 0;">+<span id="LC1233" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC1234" class="line" lang="plaintext">ifExtension :: ExtBits -> AlexAccPred ExtsBitmap</span>

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<pre style="margin: 0;"> <span id="LC1235" class="line" lang="plaintext">ifExtension extBits bits _ _ _ = extBits `xtest` bits</span>

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<pre style="margin: 0;"> <span id="LC1236" class="line" lang="plaintext"></span>

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<br>

</li>

<li id="b421960e854c6cfa1e4ca830bd6a5fc6eef91168">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/5ccd97796a5963a6087dd81e2b519f70a3bf16cc#b421960e854c6cfa1e4ca830bd6a5fc6eef91168"><strong>docs/users_guide/8.12.1-notes.rst</strong></a>

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<pre style="margin: 0;"> <span id="LC224" class="line" lang="plaintext">    f = (- x)  -- operator section</span>

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<pre style="margin: 0;"> <span id="LC225" class="line" lang="plaintext">    c = (-x)   -- negation</span>

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<pre style="margin: 0;"> <span id="LC226" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">+<span id="LC227" class="line" lang="plaintext">* The behavior of :extension:`NegativeLiterals` changed, and now we require</span>

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<pre style="margin: 0;">+<span id="LC228" class="line" lang="plaintext">  that a negative literal must not be preceded by a closing token (see</span>

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<pre style="margin: 0;">+<span id="LC229" class="line" lang="plaintext">  `GHC Proposal #229 <https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/0229-whitespace-bang-patterns.rst>`__</span>

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<pre style="margin: 0;">+<span id="LC230" class="line" lang="plaintext">  for the definition of a closing token). In other words, we parse ``f -123``</span>

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<pre style="margin: 0;">+<span id="LC231" class="line" lang="plaintext">  as ``f (-123)``, but ``x-123`` as ``(-) x 123``. Before this amendment,</span>

</pre>

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<pre style="margin: 0;">+<span id="LC232" class="line" lang="plaintext">  :extension:`NegativeLiterals` caused ``x-123`` to be parsed as ``x(-123)``.</span>

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<pre style="margin: 0;">+<span id="LC233" class="line" lang="plaintext"></span>

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<pre style="margin: 0;"> <span id="LC234" class="line" lang="plaintext">Compiler</span>

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<pre style="margin: 0;"> <span id="LC235" class="line" lang="plaintext">~~~~~~~~</span>

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<pre style="margin: 0;"> <span id="LC236" class="line" lang="plaintext"></span>

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<br>

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<li id="afc5c9567f619749d27f89c5904b2eb41814069c">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/5ccd97796a5963a6087dd81e2b519f70a3bf16cc#afc5c9567f619749d27f89c5904b2eb41814069c"><strong>docs/users_guide/exts/negative_literals.rst</strong></a>

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<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -24,9 +24,11 @@ will elicit an unexpected integer-literal-overflow message.</td>

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<pre style="margin: 0;"> <span id="LC24" class="line" lang="plaintext">Whitespace can be inserted, as in ``- 123``, to force interpretation</span>

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<pre style="margin: 0;"> <span id="LC25" class="line" lang="plaintext">as two tokens.</span>

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<pre style="margin: 0;"> <span id="LC26" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">-<span id="LC27" class="line" lang="plaintext">One pitfall is that with :extension:`NegativeLiterals`, ``x-1`` will</span>

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<pre style="margin: 0;">-<span id="LC28" class="line" lang="plaintext">be parsed as ``x`` applied to the argument ``-1``, which is usually</span>

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<pre style="margin: 0;">-<span id="LC29" class="line" lang="plaintext">not what you want.  ``x - 1`` or even ``x- 1`` can be used instead</span>

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<pre style="margin: 0;">-<span id="LC30" class="line" lang="plaintext">for subtraction. To avoid this, consider using :extension:`LexicalNegation`</span>

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<pre style="margin: 0;">-<span id="LC31" class="line" lang="plaintext">instead.</span>

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<pre style="margin: 0;">-<span id="LC32" class="line" lang="plaintext"></span></pre>

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<pre style="margin: 0;">+<span id="LC27" class="line" lang="plaintext">In 8.12, the behavior of this extension changed, and now we require that a negative literal must not be preceded by a closing token (see</span>

</pre>

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<pre style="margin: 0;">+<span id="LC28" class="line" lang="plaintext">`GHC Proposal #229 <https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/0229-whitespace-bang-patterns.rst>`__</span>

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<pre style="margin: 0;">+<span id="LC29" class="line" lang="plaintext">for the definition of a closing token). In other words, we parse ``f -123`` as ``f (-123)``, but ``x-123`` as ``(-) x</span>

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<pre style="margin: 0;">+<span id="LC30" class="line" lang="plaintext">123``. Before this amendment, :extension:`NegativeLiterals` caused ``x-123`` to be parsed as ``x(-123)``.</span>

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<pre style="margin: 0;">+<span id="LC31" class="line" lang="plaintext"></span>

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<pre style="margin: 0;">+<span id="LC32" class="line" lang="plaintext">:extension:`NegativeLiterals` is a subset of :extension:`LexicalNegation`. That</span>

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<pre style="margin: 0;">+<span id="LC33" class="line" lang="plaintext">is, enabling both of those extensions has the same effect as enabling</span>

</pre>

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<pre style="margin: 0;">+<span id="LC34" class="line" lang="plaintext">:extension:`LexicalNegation` alone.</span></pre>

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</li>

<li id="b800f96dc5df3e1c1ad35199012912cd86e63cd9">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/5ccd97796a5963a6087dd81e2b519f70a3bf16cc#b800f96dc5df3e1c1ad35199012912cd86e63cd9"><strong>testsuite/tests/parser/should_compile/LexNegVsNegLit.hs</strong>

deleted

</a>

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<pre style="margin: 0;">-<span id="LC1" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE NegativeLiterals, LexicalNegation #-}</span></span>

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<pre style="margin: 0;">-<span id="LC2" class="line" lang="haskell"></span>

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3

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<pre style="margin: 0;">-<span id="LC3" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">LexNegVsNegLit</span> <span class="kr" style="font-weight: 600;">where</span></span>

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<pre style="margin: 0;">-<span id="LC4" class="line" lang="haskell"></span>

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5

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<pre style="margin: 0;">-<span id="LC5" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- NegativeLiterals specifies that we parse x-1 as x (-1), even though it's</span></span>

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<pre style="margin: 0;">-<span id="LC6" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- considered a shortcoming.</span></span>

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<pre style="margin: 0;">-<span id="LC7" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>

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<pre style="margin: 0;">-<span id="LC8" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- LexicalNegation does not change that.</span></span>

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9

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<pre style="margin: 0;">-<span id="LC9" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>

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<pre style="margin: 0;">-<span id="LC10" class="line" lang="haskell"><span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>

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11

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<pre style="margin: 0;">-<span id="LC11" class="line" lang="haskell"><span class="n" style="color: #333;">b</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">even</span><span class="o" style="font-weight: 600;">-</span><span class="mi" style="color: #099;">1</span>  <span class="c1" style="color: #998; font-style: italic;">-- parsed as: even (-1)</span></span>

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12

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<pre style="margin: 0;">-<span id="LC12" class="line" lang="haskell">            <span class="c1" style="color: #998; font-style: italic;">-- so it is well-typed.</span></span>

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13

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<pre style="margin: 0;">-<span id="LC13" class="line" lang="haskell">            <span class="c1" style="color: #998; font-style: italic;">--</span></span>

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<pre style="margin: 0;">-<span id="LC14" class="line" lang="haskell">            <span class="c1" style="color: #998; font-style: italic;">-- with LexicalNegation alone, we'd get (-) even 1,</span></span>

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<pre style="margin: 0;">-<span id="LC15" class="line" lang="haskell">            <span class="c1" style="color: #998; font-style: italic;">-- but NegativeLiterals takes precedence here.</span></span>

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<pre style="margin: 0;">-<span id="LC16" class="line" lang="haskell"></span>

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<pre style="margin: 0;">-<span id="LC17" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- See also: GHC Proposal #344</span></span></pre>

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<li id="04eff5dcb285b3a606ab496f176ef502f171f133">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/5ccd97796a5963a6087dd81e2b519f70a3bf16cc#04eff5dcb285b3a606ab496f176ef502f171f133"><strong>testsuite/tests/parser/should_compile/NegativeLiterals.hs</strong></a>

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<pre style="margin: 0;">+<span id="LC1" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE NegativeLiterals, MagicHash, BinaryLiterals #-}</span></span>

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"></span>

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3

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">NegativeLiterals</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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4

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="5" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

5

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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Exts</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="6" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

6

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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="7" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

7

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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">------------------------------------</span></span>

</pre>

</td>

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</td>

<td class="diff-line-num new new_line" data-linenumber="8" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

8

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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Prefix occurrence of the minus --</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="9" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

9

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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">------------------------------------</span></span>

</pre>

</td>

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<td class="diff-line-num new new_line" data-linenumber="10" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

10

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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"></span>

</pre>

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11

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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell"><span class="n" style="color: #333;">p1</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="12" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

12

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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell"><span class="n" style="color: #333;">p1</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">even</span> <span class="o" style="font-weight: 600;">-</span><span class="mi" style="color: #099;">2</span>     <span class="c1" style="color: #998; font-style: italic;">-- parsed as:  even (-2)</span></span>

</pre>

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13

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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"></span>

</pre>

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14

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<pre style="margin: 0;">+<span id="LC14" class="line" lang="haskell"><span class="n" style="color: #333;">p2</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="15" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

15

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<pre style="margin: 0;">+<span id="LC15" class="line" lang="haskell"><span class="n" style="color: #333;">p2</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">I</span><span class="o" style="font-weight: 600;">#</span> <span class="o" style="font-weight: 600;">-</span><span class="mi" style="color: #099;">1</span><span class="o" style="font-weight: 600;">#</span>      <span class="c1" style="color: #998; font-style: italic;">-- parsed as:  I# (-1#)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="16" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

16

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<pre style="margin: 0;">+<span id="LC16" class="line" lang="haskell"></span>

</pre>

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17

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<pre style="margin: 0;">+<span id="LC17" class="line" lang="haskell"><span class="n" style="color: #333;">p3</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="18" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

18

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<pre style="margin: 0;">+<span id="LC18" class="line" lang="haskell"><span class="n" style="color: #333;">p3</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">floor</span> <span class="o" style="font-weight: 600;">-</span><span class="mf" style="color: #099;">2.4</span>  <span class="c1" style="color: #998; font-style: italic;">-- parsed as:  floor (-2.4)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="19" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

19

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<pre style="margin: 0;">+<span id="LC19" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="20" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

20

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<pre style="margin: 0;">+<span id="LC20" class="line" lang="haskell"><span class="n" style="color: #333;">p4</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Float</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="21" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

21

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<pre style="margin: 0;">+<span id="LC21" class="line" lang="haskell"><span class="n" style="color: #333;">p4</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">F</span><span class="o" style="font-weight: 600;">#</span> <span class="o" style="font-weight: 600;">-</span><span class="mf" style="color: #099;">0.01</span><span class="o" style="font-weight: 600;">#</span>   <span class="c1" style="color: #998; font-style: italic;">-- parsed as:  F# (-0.01#)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="22" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

22

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<pre style="margin: 0;">+<span id="LC22" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="23" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

23

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<pre style="margin: 0;">+<span id="LC23" class="line" lang="haskell"><span class="n" style="color: #333;">p5</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Double</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="24" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

24

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<pre style="margin: 0;">+<span id="LC24" class="line" lang="haskell"><span class="n" style="color: #333;">p5</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">D</span><span class="o" style="font-weight: 600;">#</span> <span class="o" style="font-weight: 600;">-</span><span class="mf" style="color: #099;">0.01</span><span class="o" style="font-weight: 600;">##</span>  <span class="c1" style="color: #998; font-style: italic;">-- parsed as:  D# (-0.01##)</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="25" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

25

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<pre style="margin: 0;">+<span id="LC25" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="26" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

26

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<pre style="margin: 0;">+<span id="LC26" class="line" lang="haskell"><span class="n" style="color: #333;">p6</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Bool</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="27" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

27

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<pre style="margin: 0;">+<span id="LC27" class="line" lang="haskell"><span class="n" style="color: #333;">p6</span> <span class="o" style="font-weight: 600;">=</span>   <span class="n" style="color: #333;">even</span> <span class="o" style="font-weight: 600;">-</span><span class="mi" style="color: #099;">0</span><span class="n" style="color: #333;">b10</span>  <span class="c1" style="color: #998; font-style: italic;">-- parsed as: even (-2)</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="28" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

28

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<pre style="margin: 0;">+<span id="LC28" class="line" lang="haskell">    <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">even</span> <span class="o" style="font-weight: 600;">-</span><span class="mo" style="color: #099;">0o10</span>  <span class="c1" style="color: #998; font-style: italic;">-- parsed as: even (-8)</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="29" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

29

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<pre style="margin: 0;">+<span id="LC29" class="line" lang="haskell">    <span class="o" style="font-weight: 600;">||</span> <span class="n" style="color: #333;">even</span> <span class="o" style="font-weight: 600;">-</span><span class="mh" style="color: #099;">0x10</span>  <span class="c1" style="color: #998; font-style: italic;">-- parsed as: even (-16)</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="30" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

30

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<pre style="margin: 0;">+<span id="LC30" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new new_line" data-linenumber="31" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

31

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<pre style="margin: 0;">+<span id="LC31" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-----------------------------------------</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="32" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC32" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Tight infix occurrence of the minus --</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="33" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

33

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<pre style="margin: 0;">+<span id="LC33" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-----------------------------------------</span></span>

</pre>

</td>

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</td>

<td class="diff-line-num new new_line" data-linenumber="34" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

34

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<pre style="margin: 0;">+<span id="LC34" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="35" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC35" class="line" lang="haskell"><span class="n" style="color: #333;">ti1</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Integer</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Integer</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="36" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

36

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<pre style="margin: 0;">+<span id="LC36" class="line" lang="haskell"><span class="n" style="color: #333;">ti1</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">x</span><span class="o" style="font-weight: 600;">-</span><span class="mi" style="color: #099;">2</span>       <span class="c1" style="color: #998; font-style: italic;">-- parsed as:  (-) x 1</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="37" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

37

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<pre style="margin: 0;">+<span id="LC37" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="38" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

38

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<pre style="margin: 0;">+<span id="LC38" class="line" lang="haskell"><span class="n" style="color: #333;">ti2</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="o" style="font-weight: 600;">#</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="o" style="font-weight: 600;">#</span></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="39" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

39

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<pre style="margin: 0;">+<span id="LC39" class="line" lang="haskell"><span class="n" style="color: #333;">ti2</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">x</span><span class="o" style="font-weight: 600;">-</span><span class="mi" style="color: #099;">1</span><span class="o" style="font-weight: 600;">#</span>      <span class="c1" style="color: #998; font-style: italic;">-- parsed as:  (-) x 1#</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="40" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

40

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<pre style="margin: 0;">+<span id="LC40" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span> <span class="p">(</span><span class="o" style="font-weight: 600;">-</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="o" style="font-weight: 600;">-#</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="41" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

41

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<pre style="margin: 0;">+<span id="LC41" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="42" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

42

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<pre style="margin: 0;">+<span id="LC42" class="line" lang="haskell"><span class="n" style="color: #333;">ti3</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Double</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Double</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="43" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

43

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<pre style="margin: 0;">+<span id="LC43" class="line" lang="haskell"><span class="n" style="color: #333;">ti3</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">x</span><span class="o" style="font-weight: 600;">-</span><span class="mf" style="color: #099;">2.4</span>     <span class="c1" style="color: #998; font-style: italic;">-- parsed as:  (-) x 2.4</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="44" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC44" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="45" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC45" class="line" lang="haskell"><span class="n" style="color: #333;">ti4</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Float</span><span class="o" style="font-weight: 600;">#</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Float</span><span class="o" style="font-weight: 600;">#</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="46" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC46" class="line" lang="haskell"><span class="n" style="color: #333;">ti4</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">x</span><span class="o" style="font-weight: 600;">-</span><span class="mf" style="color: #099;">0.1</span><span class="o" style="font-weight: 600;">#</span>    <span class="c1" style="color: #998; font-style: italic;">-- parsed as:  (-) x 0.1#</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="47" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC47" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span> <span class="p">(</span><span class="o" style="font-weight: 600;">-</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">minusFloat</span><span class="o" style="font-weight: 600;">#</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="48" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

48

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<pre style="margin: 0;">+<span id="LC48" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="49" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC49" class="line" lang="haskell"><span class="n" style="color: #333;">ti5</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Double</span><span class="o" style="font-weight: 600;">#</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Double</span><span class="o" style="font-weight: 600;">#</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="50" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC50" class="line" lang="haskell"><span class="n" style="color: #333;">ti5</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">x</span><span class="o" style="font-weight: 600;">-</span><span class="mf" style="color: #099;">0.1</span><span class="o" style="font-weight: 600;">##</span>   <span class="c1" style="color: #998; font-style: italic;">-- parsed as:  (-) x 0.1##</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="51" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC51" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span> <span class="p">(</span><span class="o" style="font-weight: 600;">-</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="o" style="font-weight: 600;">-##</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="52" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC52" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="53" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC53" class="line" lang="haskell"><span class="n" style="color: #333;">ti6</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Integer</span> <span class="o" style="font-weight: 600;">-></span> <span class="p">[</span><span class="kt" style="color: #458; font-weight: 600;">Integer</span><span class="p">]</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="54" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC54" class="line" lang="haskell"><span class="n" style="color: #333;">ti6</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="55" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC55" class="line" lang="haskell">  <span class="p">[</span> <span class="n" style="color: #333;">x</span><span class="o" style="font-weight: 600;">-</span><span class="mi" style="color: #099;">0</span><span class="n" style="color: #333;">b10</span><span class="p">,</span>    <span class="c1" style="color: #998; font-style: italic;">-- parsed as: (-) x 2</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="56" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC56" class="line" lang="haskell">    <span class="n" style="color: #333;">x</span><span class="o" style="font-weight: 600;">-</span><span class="mo" style="color: #099;">0o10</span><span class="p">,</span>    <span class="c1" style="color: #998; font-style: italic;">-- parsed as: (-) x 8</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="57" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC57" class="line" lang="haskell">    <span class="n" style="color: #333;">x</span><span class="o" style="font-weight: 600;">-</span><span class="mh" style="color: #099;">0x10</span>  <span class="p">]</span>  <span class="c1" style="color: #998; font-style: italic;">-- parsed as: (-) x 16</span></span></pre>

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<br>

</li>

<li id="8aabc635237173c8209944a56d18d2a07e0dae7f">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/5ccd97796a5963a6087dd81e2b519f70a3bf16cc#8aabc635237173c8209944a56d18d2a07e0dae7f"><strong>testsuite/tests/parser/should_compile/NegativeLiteralsNoExt.hs</strong></a>

<hr>

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1

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<pre style="margin: 0;">+<span id="LC1" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# LANGUAGE NoNegativeLiterals, MagicHash, BinaryLiterals #-}</span></span>

</pre>

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2

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<pre style="margin: 0;">+<span id="LC2" class="line" lang="haskell"></span>

</pre>

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3

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<pre style="margin: 0;">+<span id="LC3" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Even when NegativeLiterals are disabled,</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="4" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

4

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<pre style="margin: 0;">+<span id="LC4" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- we parse unboxed literals appropriately.</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="5" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

5

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<pre style="margin: 0;">+<span id="LC5" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">module</span> <span class="nn" style="color: #555;">NegativeLiteralsNoExt</span> <span class="kr" style="font-weight: 600;">where</span></span>

</pre>

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6

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<pre style="margin: 0;">+<span id="LC6" class="line" lang="haskell"></span>

</pre>

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7

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<pre style="margin: 0;">+<span id="LC7" class="line" lang="haskell"><span class="kr" style="font-weight: 600;">import</span> <span class="nn" style="color: #555;">GHC.Exts</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="8" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

8

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<pre style="margin: 0;">+<span id="LC8" class="line" lang="haskell"></span>

</pre>

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9

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<pre style="margin: 0;">+<span id="LC9" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">------------------------------------</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="10" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

10

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<pre style="margin: 0;">+<span id="LC10" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Prefix occurrence of the minus --</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="11" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

11

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<pre style="margin: 0;">+<span id="LC11" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">------------------------------------</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="12" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

12

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<pre style="margin: 0;">+<span id="LC12" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="13" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

13

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<pre style="margin: 0;">+<span id="LC13" class="line" lang="haskell"><span class="n" style="color: #333;">p2</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="14" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

14

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<pre style="margin: 0;">+<span id="LC14" class="line" lang="haskell"><span class="n" style="color: #333;">p2</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">I</span><span class="o" style="font-weight: 600;">#</span> <span class="o" style="font-weight: 600;">-</span><span class="mi" style="color: #099;">1</span><span class="o" style="font-weight: 600;">#</span>      <span class="c1" style="color: #998; font-style: italic;">-- parsed as:  I# (-1#)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="15" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

15

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<pre style="margin: 0;">+<span id="LC15" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="16" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

16

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<pre style="margin: 0;">+<span id="LC16" class="line" lang="haskell"><span class="n" style="color: #333;">p4</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Float</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="17" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

17

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<pre style="margin: 0;">+<span id="LC17" class="line" lang="haskell"><span class="n" style="color: #333;">p4</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">F</span><span class="o" style="font-weight: 600;">#</span> <span class="o" style="font-weight: 600;">-</span><span class="mf" style="color: #099;">0.01</span><span class="o" style="font-weight: 600;">#</span>   <span class="c1" style="color: #998; font-style: italic;">-- parsed as:  F# (-0.01#)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="18" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

18

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<pre style="margin: 0;">+<span id="LC18" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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19

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<pre style="margin: 0;">+<span id="LC19" class="line" lang="haskell"><span class="n" style="color: #333;">p5</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Double</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="20" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

20

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<pre style="margin: 0;">+<span id="LC20" class="line" lang="haskell"><span class="n" style="color: #333;">p5</span> <span class="o" style="font-weight: 600;">=</span> <span class="kt" style="color: #458; font-weight: 600;">D</span><span class="o" style="font-weight: 600;">#</span> <span class="o" style="font-weight: 600;">-</span><span class="mf" style="color: #099;">0.01</span><span class="o" style="font-weight: 600;">##</span>  <span class="c1" style="color: #998; font-style: italic;">-- parsed as:  D# (-0.01##)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="21" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

21

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<pre style="margin: 0;">+<span id="LC21" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="22" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

22

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<pre style="margin: 0;">+<span id="LC22" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-----------------------------------------</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="23" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

23

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<pre style="margin: 0;">+<span id="LC23" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- Tight infix occurrence of the minus --</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="24" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

24

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<pre style="margin: 0;">+<span id="LC24" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-----------------------------------------</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="25" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

25

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<pre style="margin: 0;">+<span id="LC25" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="26" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

26

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<pre style="margin: 0;">+<span id="LC26" class="line" lang="haskell"><span class="n" style="color: #333;">ti2</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="o" style="font-weight: 600;">#</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Int</span><span class="o" style="font-weight: 600;">#</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="27" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

27

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<pre style="margin: 0;">+<span id="LC27" class="line" lang="haskell"><span class="n" style="color: #333;">ti2</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">x</span><span class="o" style="font-weight: 600;">-</span><span class="mi" style="color: #099;">1</span><span class="o" style="font-weight: 600;">#</span>      <span class="c1" style="color: #998; font-style: italic;">-- parsed as:  (-) x 1#</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="28" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

28

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<pre style="margin: 0;">+<span id="LC28" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span> <span class="p">(</span><span class="o" style="font-weight: 600;">-</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="o" style="font-weight: 600;">-#</span><span class="p">)</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="29" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

29

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<pre style="margin: 0;">+<span id="LC29" class="line" lang="haskell"></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="30" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

30

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<pre style="margin: 0;">+<span id="LC30" class="line" lang="haskell"><span class="n" style="color: #333;">ti3</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Double</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Double</span></span>

</pre>

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</td>

<td class="diff-line-num new new_line" data-linenumber="31" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

31

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<pre style="margin: 0;">+<span id="LC31" class="line" lang="haskell"><span class="n" style="color: #333;">ti3</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">x</span><span class="o" style="font-weight: 600;">-</span><span class="mf" style="color: #099;">2.4</span>     <span class="c1" style="color: #998; font-style: italic;">-- parsed as:  (-) x 2.4</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="32" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

32

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<pre style="margin: 0;">+<span id="LC32" class="line" lang="haskell"></span>

</pre>

</td>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="33" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

33

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<pre style="margin: 0;">+<span id="LC33" class="line" lang="haskell"><span class="n" style="color: #333;">ti4</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Float</span><span class="o" style="font-weight: 600;">#</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Float</span><span class="o" style="font-weight: 600;">#</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="34" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

34

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<pre style="margin: 0;">+<span id="LC34" class="line" lang="haskell"><span class="n" style="color: #333;">ti4</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">x</span><span class="o" style="font-weight: 600;">-</span><span class="mf" style="color: #099;">0.1</span><span class="o" style="font-weight: 600;">#</span>    <span class="c1" style="color: #998; font-style: italic;">-- parsed as:  (-) x 0.1#</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="0" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

</td>

<td class="diff-line-num new new_line" data-linenumber="35" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

35

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<pre style="margin: 0;">+<span id="LC35" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span> <span class="p">(</span><span class="o" style="font-weight: 600;">-</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">minusFloat</span><span class="o" style="font-weight: 600;">#</span></span>

</pre>

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<td class="diff-line-num new new_line" data-linenumber="36" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

36

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<pre style="margin: 0;">+<span id="LC36" class="line" lang="haskell"></span>

</pre>

</td>

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37

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<pre style="margin: 0;">+<span id="LC37" class="line" lang="haskell"><span class="n" style="color: #333;">ti5</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">Double</span><span class="o" style="font-weight: 600;">#</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">Double</span><span class="o" style="font-weight: 600;">#</span></span>

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<td class="diff-line-num new new_line" data-linenumber="38" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

38

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<pre style="margin: 0;">+<span id="LC38" class="line" lang="haskell"><span class="n" style="color: #333;">ti5</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">x</span><span class="o" style="font-weight: 600;">-</span><span class="mf" style="color: #099;">0.1</span><span class="o" style="font-weight: 600;">##</span>   <span class="c1" style="color: #998; font-style: italic;">-- parsed as:  (-) x 0.1##</span></span>

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<td class="diff-line-num new new_line" data-linenumber="39" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

39

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<pre style="margin: 0;">+<span id="LC39" class="line" lang="haskell">  <span class="kr" style="font-weight: 600;">where</span> <span class="p">(</span><span class="o" style="font-weight: 600;">-</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="p">(</span><span class="o" style="font-weight: 600;">-##</span><span class="p">)</span></span></pre>

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<li id="a43397658ba43ce6747320867b3a0330bcea2ea5">

<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/5ccd97796a5963a6087dd81e2b519f70a3bf16cc#a43397658ba43ce6747320867b3a0330bcea2ea5"><strong>testsuite/tests/parser/should_compile/all.T</strong></a>

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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="153" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="diff-line-num unfold js-unfold new_line" data-linenumber="153" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>

<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -153,7 +153,8 @@ test('proposal-229b', normal, compile, [''])</td>

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<td class="diff-line-num old_line" data-linenumber="153" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

153

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153

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<pre style="margin: 0;"> <span id="LC153" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">proposal-229d</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

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<td class="diff-line-num old_line" data-linenumber="154" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

154

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<td class="diff-line-num new_line" data-linenumber="154" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

154

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<pre style="margin: 0;"> <span id="LC154" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">proposal-229e</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

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<td class="diff-line-num old_line" data-linenumber="155" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

155

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155

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<pre style="margin: 0;"> <span id="LC155" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">LexicalNegation</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

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156

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<pre style="margin: 0;">-<span id="LC156" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">LexNegVsNegLit</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

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<td class="diff-line-num new new_line" data-linenumber="156" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<pre style="margin: 0;">+<span id="LC156" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">NegativeLiterals</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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<td class="diff-line-num new old_line" data-linenumber="157" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

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<td class="diff-line-num new new_line" data-linenumber="157" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">

157

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<pre style="margin: 0;">+<span id="LC157" class="line" lang="perl"><span class="nv" style="color: #008080;">test</span><span class="p">('</span><span class="s1" style="color: #d14;">NegativeLiteralsNoExt</span><span class="p">',</span> <span class="nv" style="color: #008080;">normal</span><span class="p">,</span> <span class="nv" style="color: #008080;">compile</span><span class="p">,</span> <span class="p">[''])</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="157" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<td class="diff-line-num new_line" data-linenumber="158" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC158" class="line" lang="perl"></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="158" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

158

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<td class="diff-line-num new_line" data-linenumber="159" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

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<pre style="margin: 0;"> <span id="LC159" class="line" lang="perl"><span class="c1" style="color: #998; font-style: italic;"># We omit 'profasm' because it fails with:</span></span>

</pre>

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<td class="diff-line-num old_line" data-linenumber="159" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

159

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<td class="diff-line-num new_line" data-linenumber="160" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">

160

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<pre style="margin: 0;"> <span id="LC160" class="line" lang="perl"><span class="c1" style="color: #998; font-style: italic;"># Cannot load -prof objects when GHC is built with -dynamic</span></span>

</pre>

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