[Git][ghc/ghc][master] Replace errors from badOrigBinding with new one (#22839)
Marge Bot (@marge-bot)
gitlab at gitlab.haskell.org
Fri Jan 27 10:02:27 UTC 2023
Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC
Commits:
2648c09c by Andrei Borzenkov at 2023-01-27T05:02:07-05:00
Replace errors from badOrigBinding with new one (#22839)
Problem: in 02279a9c the type-level [] syntax was changed from a built-in name
to an alias for the GHC.Types.List constructor. badOrigBinding assumes that if
a name is not built-in then it must have come from TH quotation, but this is
not necessarily the case with [].
The outdated assumption in badOrigBinding leads to incorrect error messages.
This code:
data []
Fails with "Cannot redefine a Name retrieved by a Template Haskell quote: []"
Unfortunately, there is not enough information in RdrName to directly determine
if the name was constructed via TH or by the parser, so this patch changes the
error message instead.
It unifies TcRnIllegalBindingOfBuiltIn and TcRnNameByTemplateHaskellQuote
into a new error TcRnBindingOfExistingName and changes its wording to avoid
guessing the origin of the name.
- - - - -
10 changed files:
- compiler/GHC/Rename/Env.hs
- compiler/GHC/Tc/Errors/Ppr.hs
- compiler/GHC/Tc/Errors/Types.hs
- compiler/GHC/Types/Error/Codes.hs
- testsuite/tests/rename/should_fail/T14907b.stderr
- + testsuite/tests/rename/should_fail/T22839.hs
- + testsuite/tests/rename/should_fail/T22839.stderr
- testsuite/tests/rename/should_fail/all.T
- testsuite/tests/rename/should_fail/rnfail042.stderr
- testsuite/tests/th/T13968.stderr
Changes:
=====================================
compiler/GHC/Rename/Env.hs
=====================================
@@ -187,7 +187,7 @@ newTopSrcBinder (L loc rdr_name)
if isExternalName name then
do { this_mod <- getModule
; unless (this_mod == nameModule name)
- (addErrAt (locA loc) (badOrigBinding rdr_name))
+ (addErrAt (locA loc) (TcRnBindingOfExistingName rdr_name))
; return name }
else -- See Note [Binders in Template Haskell] in "GHC.ThToHs"
do { this_mod <- getModule
@@ -196,7 +196,7 @@ newTopSrcBinder (L loc rdr_name)
| Just (rdr_mod, rdr_occ) <- isOrig_maybe rdr_name
= do { this_mod <- getModule
; unless (rdr_mod == this_mod || rdr_mod == rOOT_MAIN)
- (addErrAt (locA loc) (badOrigBinding rdr_name))
+ (addErrAt (locA loc) (TcRnBindingOfExistingName rdr_name))
-- When reading External Core we get Orig names as binders,
-- but they should agree with the module gotten from the monad
--
@@ -205,7 +205,7 @@ newTopSrcBinder (L loc rdr_name)
-- the constructor is parsed as a type, and then GHC.Parser.PostProcess.tyConToDataCon
-- uses setRdrNameSpace to make it into a data constructors. At that point
-- the nice Exact name for the TyCon gets swizzled to an Orig name.
- -- Hence the badOrigBinding error message.
+ -- Hence the TcRnBindingOfExistingName error message.
--
-- MP 2022: I suspect this code path is never called for `rOOT_MAIN` anymore
@@ -2118,13 +2118,3 @@ lookupQualifiedDoName ctxt std_name
= case qualifiedDoModuleName_maybe ctxt of
Nothing -> lookupSyntaxName std_name
Just modName -> lookupNameWithQualifier std_name modName
-
-
--- Error messages
-
-badOrigBinding :: RdrName -> TcRnMessage
-badOrigBinding name
- | Just _ <- isBuiltInOcc_maybe occ = TcRnIllegalBindingOfBuiltIn occ
- | otherwise = TcRnNameByTemplateHaskellQuote name
- where
- occ = rdrNameOcc $ filterCTuple name
=====================================
compiler/GHC/Tc/Errors/Ppr.hs
=====================================
@@ -25,7 +25,7 @@ module GHC.Tc.Errors.Ppr
import GHC.Prelude
import GHC.Builtin.Names
-import GHC.Builtin.Types ( boxedRepDataConTyCon, tYPETyCon )
+import GHC.Builtin.Types ( boxedRepDataConTyCon, tYPETyCon, filterCTuple )
import GHC.Core.Coercion
import GHC.Core.Unify ( tcMatchTys )
@@ -968,10 +968,6 @@ instance Diagnostic TcRnMessage where
-> mkSimpleDecorated $
text "You cannot SPECIALISE" <+> quotes (ppr name)
<+> text "because its definition is not visible in this module"
- TcRnNameByTemplateHaskellQuote name -> mkSimpleDecorated $
- text "Cannot redefine a Name retrieved by a Template Haskell quote:" <+> ppr name
- TcRnIllegalBindingOfBuiltIn name -> mkSimpleDecorated $
- text "Illegal binding of built-in syntax:" <+> ppr name
TcRnPragmaWarning {pragma_warning_occ, pragma_warning_msg, pragma_warning_import_mod, pragma_warning_defined_mod}
-> mkSimpleDecorated $
sep [ sep [ text "In the use of"
@@ -1238,6 +1234,8 @@ instance Diagnostic TcRnMessage where
Left gbl_names -> vcat (map (\name -> quotes (ppr $ grePrintableName name) <+> pprNameProvenance name) gbl_names)
Right lcl_name -> quotes (ppr lcl_name) <+> text "defined at"
<+> ppr (nameSrcLoc lcl_name)
+ TcRnBindingOfExistingName name -> mkSimpleDecorated $
+ text "Illegal binding of an existing name:" <+> ppr (filterCTuple name)
diagnosticReason = \case
TcRnUnknownMessage m
@@ -1552,10 +1550,6 @@ instance Diagnostic TcRnMessage where
-> WarningWithoutFlag
TcRnSpecialiseNotVisible{}
-> WarningWithoutFlag
- TcRnNameByTemplateHaskellQuote{}
- -> ErrorWithoutFlag
- TcRnIllegalBindingOfBuiltIn{}
- -> ErrorWithoutFlag
TcRnPragmaWarning{}
-> WarningWithFlag Opt_WarnWarningsDeprecations
TcRnIllegalHsigDefaultMethods{}
@@ -1646,6 +1640,8 @@ instance Diagnostic TcRnMessage where
-> ErrorWithoutFlag
TcRnCapturedTermName{}
-> WarningWithFlag Opt_WarnTermVariableCapture
+ TcRnBindingOfExistingName{}
+ -> ErrorWithoutFlag
diagnosticHints = \case
TcRnUnknownMessage m
@@ -1962,10 +1958,6 @@ instance Diagnostic TcRnMessage where
-> noHints
TcRnSpecialiseNotVisible name
-> [SuggestSpecialiseVisibilityHints name]
- TcRnNameByTemplateHaskellQuote{}
- -> noHints
- TcRnIllegalBindingOfBuiltIn{}
- -> noHints
TcRnPragmaWarning{}
-> noHints
TcRnIllegalHsigDefaultMethods{}
@@ -2059,6 +2051,8 @@ instance Diagnostic TcRnMessage where
-> [suggestExtension LangExt.TupleSections]
TcRnCapturedTermName{}
-> [SuggestRenameTypeVariable]
+ TcRnBindingOfExistingName{}
+ -> noHints
diagnosticCode = constructorCode
=====================================
compiler/GHC/Tc/Errors/Types.hs
=====================================
@@ -2193,32 +2193,6 @@ data TcRnMessage where
-}
TcRnSpecialiseNotVisible :: !Name -> TcRnMessage
- {- TcRnNameByTemplateHaskellQuote is an error that occurs when one tries
- to use a Template Haskell splice to define a top-level identifier with
- an already existing name.
-
- (See issue #13968 (closed) on GHC's issue tracker for more details)
-
- Example(s):
-
- $(pure [ValD (VarP 'succ) (NormalB (ConE 'True)) []])
-
- Test cases:
- T13968
- -}
- TcRnNameByTemplateHaskellQuote :: !RdrName -> TcRnMessage
-
- {- TcRnIllegalBindingOfBuiltIn is an error that occurs when one uses built-in
- syntax for data constructors or class names.
-
- Use an OccName here because we don't want to print Prelude.(,)
-
- Test cases:
- rename/should_fail/T14907b
- rename/should_fail/rnfail042
- -}
- TcRnIllegalBindingOfBuiltIn :: !OccName -> TcRnMessage
-
{- TcRnPragmaWarning is a warning that can happen when usage of something
is warned or deprecated by pragma.
@@ -2773,6 +2747,22 @@ data TcRnMessage where
-}
TcRnSectionWithoutParentheses :: HsExpr GhcPs -> TcRnMessage
+ {- TcRnBindingOfExistingName is an error triggered by an attempt to rebind
+ built-in syntax, punned list or tuple syntax, or a name quoted via Template Haskell.
+
+ Examples:
+
+ data []
+ data (->)
+ $(pure [ValD (VarP 'succ) (NormalB (ConE 'True)) []])
+
+ Test cases: rename/should_fail/T14907b
+ rename/should_fail/T22839
+ rename/should_fail/rnfail042
+ th/T13968
+ -}
+ TcRnBindingOfExistingName :: RdrName -> TcRnMessage
+
deriving Generic
-- | Things forbidden in @type data@ declarations.
=====================================
compiler/GHC/Types/Error/Codes.hs
=====================================
@@ -468,8 +468,6 @@ type family GhcDiagnosticCode c = n | n -> c where
GhcDiagnosticCode "TcRnNonOverloadedSpecialisePragma" = 35827
GhcDiagnosticCode "TcRnSpecialiseNotVisible" = 85337
GhcDiagnosticCode "TcRnIllegalTypeOperatorDecl" = 50649
- GhcDiagnosticCode "TcRnNameByTemplateHaskellQuote" = 40027
- GhcDiagnosticCode "TcRnIllegalBindingOfBuiltIn" = 69639
GhcDiagnosticCode "TcRnIllegalHsigDefaultMethods" = 93006
GhcDiagnosticCode "TcRnBadGenericMethod" = 59794
@@ -502,6 +500,7 @@ type family GhcDiagnosticCode c = n | n -> c where
GhcDiagnosticCode "TcRnBadFamInstDecl" = 06206
GhcDiagnosticCode "TcRnNotOpenFamily" = 06207
GhcDiagnosticCode "TcRnCapturedTermName" = 54201
+ GhcDiagnosticCode "TcRnBindingOfExistingName" = 58805
-- IllegalNewtypeReason
GhcDiagnosticCode "DoesNotHaveSingleField" = 23517
@@ -607,6 +606,8 @@ type family GhcDiagnosticCode c = n | n -> c where
-- no longer reports. These are collected below.
GhcDiagnosticCode "Example outdated error" = 00000
+ GhcDiagnosticCode "TcRnNameByTemplateHaskellQuote" = 40027
+ GhcDiagnosticCode "TcRnIllegalBindingOfBuiltIn" = 69639
{- *********************************************************************
* *
=====================================
testsuite/tests/rename/should_fail/T14907b.stderr
=====================================
@@ -1,9 +1,9 @@
-T14907b.hs:5:1: error: [GHC-69639]
- Illegal binding of built-in syntax: ()
+T14907b.hs:5:1: error: [GHC-58805]
+ Illegal binding of an existing name: ()
-T14907b.hs:6:1: error: [GHC-69639]
- Illegal binding of built-in syntax: (,)
+T14907b.hs:6:1: error: [GHC-58805]
+ Illegal binding of an existing name: (,)
-T14907b.hs:7:1: error: [GHC-69639]
- Illegal binding of built-in syntax: (,,)
+T14907b.hs:7:1: error: [GHC-58805]
+ Illegal binding of an existing name: (,,)
=====================================
testsuite/tests/rename/should_fail/T22839.hs
=====================================
@@ -0,0 +1,5 @@
+module T22839 where
+
+data []
+
+data (->)
=====================================
testsuite/tests/rename/should_fail/T22839.stderr
=====================================
@@ -0,0 +1,6 @@
+
+T22839.hs:3:1: error: [GHC-58805]
+ Illegal binding of an existing name: []
+
+T22839.hs:5:1: error: [GHC-58805]
+ Illegal binding of an existing name: ->
=====================================
testsuite/tests/rename/should_fail/all.T
=====================================
@@ -183,3 +183,4 @@ test('T21605a', normal, compile_fail, [''])
test('T21605b', normal, compile_fail, [''])
test('T21605c', normal, compile_fail, [''])
test('T21605d', normal, compile_fail, [''])
+test('T22839', normal, compile_fail, [''])
=====================================
testsuite/tests/rename/should_fail/rnfail042.stderr
=====================================
@@ -1,12 +1,12 @@
-rnfail042.hs:5:11: error: [GHC-69639]
- Illegal binding of built-in syntax: ()
+rnfail042.hs:5:11: error: [GHC-58805]
+ Illegal binding of an existing name: ()
-rnfail042.hs:6:10: error: [GHC-69639]
- Illegal binding of built-in syntax: (,,,)
+rnfail042.hs:6:10: error: [GHC-58805]
+ Illegal binding of an existing name: (,,,)
-rnfail042.hs:7:12: error: [GHC-69639]
- Illegal binding of built-in syntax: []
+rnfail042.hs:7:12: error: [GHC-58805]
+ Illegal binding of an existing name: []
-rnfail042.hs:8:13: error: [GHC-69639]
- Illegal binding of built-in syntax: :
+rnfail042.hs:8:13: error: [GHC-58805]
+ Illegal binding of an existing name: :
=====================================
testsuite/tests/th/T13968.stderr
=====================================
@@ -1,3 +1,3 @@
-T13968.hs:6:2: error: [GHC-40027]
- Cannot redefine a Name retrieved by a Template Haskell quote: succ
+T13968.hs:6:2: error: [GHC-58805]
+ Illegal binding of an existing name: succ
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/2648c09cd3caefbcb5febd41867347b81cd94e47
--
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/2648c09cd3caefbcb5febd41867347b81cd94e47
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