[commit: ghc] master: Implement the basics of hex floating point literals (b0b80e9)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/b0b80e90c0382a6cdb61c96c860feac27482d6e8/ghc

>---------------------------------------------------------------

commit b0b80e90c0382a6cdb61c96c860feac27482d6e8
Author: Iavor Diatchki <iavor.diatchki at gmail.com>
Date:   Thu Nov 2 12:02:22 2017 -0400

    Implement the basics of hex floating point literals
    
    Implement hexadecmial floating point literals.
    
    The digits of the mantissa are hexadecimal.
    The exponent is written in base 10, and the base for the exponentiation is 2.
    Hexadecimal literals look a lot like ordinary decimal literals, except that
    they use hexadecmial digits, and the exponent is written using `p` rather than `e`.
    
    The specification of the feature is available here:
    https://github.com/ghc-proposals/ghc-proposals/blob/master/proposals/0004-hexFloats.rst
    
    For a discussion of the various choices:
    https://github.com/ghc-proposals/ghc-proposals/pull/37
    
    Reviewers: mpickering, goldfire, austin, bgamari, hvr
    
    Reviewed By: bgamari
    
    Subscribers: mpickering, thomie
    
    Differential Revision: https://phabricator.haskell.org/D3066


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b0b80e90c0382a6cdb61c96c860feac27482d6e8
 compiler/main/DynFlags.hs                          |  1 +
 compiler/parser/Lexer.x                            | 26 ++++++++--
 compiler/utils/Util.hs                             | 59 +++++++++++++++++++++-
 docs/users_guide/8.4.1-notes.rst                   |  5 ++
 docs/users_guide/glasgow_exts.rst                  | 44 ++++++++++++++++
 libraries/base/Numeric.hs                          | 48 ++++++++++++++++++
 libraries/base/changelog.md                        |  2 +
 .../ghc-boot-th/GHC/LanguageExtensions/Type.hs     |  1 +
 testsuite/tests/driver/T4437.hs                    |  3 +-
 .../tests/parser/should_run/HexFloatLiterals.hs    | 16 ++++++
 .../parser/should_run/HexFloatLiterals.stdout      |  4 ++
 testsuite/tests/parser/should_run/all.T            |  1 +
 12 files changed, 203 insertions(+), 7 deletions(-)

Diff suppressed because of size. To see it, use:

    git diff-tree --root --patch-with-stat --no-color --find-copies-harder --ignore-space-at-eol --cc b0b80e90c0382a6cdb61c96c860feac27482d6e8