[commit: ghc] master: Make language extensions their own category in the documentation (61f1b46)

[git at git.haskell.org]

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

On branch  : master
Link       : http://ghc.haskell.org/trac/ghc/changeset/61f1b46e2a56fcb1e95dd1c4e87fb31940b3412d/ghc

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

commit 61f1b46e2a56fcb1e95dd1c4e87fb31940b3412d
Author: Joachim Breitner <mail at joachim-breitner.de>
Date:   Thu Oct 19 14:21:49 2017 -0400

    Make language extensions their own category in the documentation
    
    I.e. instead of
    
        .. ghc-flag:: -XUnboxedTuples
            :shortdesc: Enable the use of unboxed tuple syntax.
            :type: dynamic
            :reverse: -XNoUnboxedTuples
            :category:
    
    one simply writes
    
        .. extension:: UnboxedTuples
            :shortdesc: Enable the use of unboxed tuple syntax.
    
    This allows language extensions to be referenced as
    
        If :extension:`UnboxedTuples` is enabled, then...
    
    This directive still creates the entries for the `-XUnboxedTuples` flag,
    so in particular,
    
        Set :ghc-flag:`-XUnboxedTuples` if you have to.
    
    still works, and lists of flags in general (e.g. for the manpage)
    include these.
    
    I also removed lots of links from the shortdesc of the extensions, when
    this link simply points to the section where the extension is defined.
    
    I removed the list of `-X` flags from the flag reference table, but added a
    table of extension under “10.1. Language options”
    
    Lots of text in the manual now refers to “extension `Foo`” rather than
    “flag `-XFoo`”.
    
    I consider `-XFoo` a historic artifact that stems from when language
    extensions were really just flags. These days, the use of `-XFoo` is
    (IMHO) deprecated: You should be using `LANGUAGE Foo`, or maybe the
    appropriate field in a `.cabal` file. See 9278994 which did this change
    to error messages already.
    
    Differential Revision: https://phabricator.haskell.org/D4112


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

61f1b46e2a56fcb1e95dd1c4e87fb31940b3412d
 docs/users_guide/ffi-chap.rst               |   21 +-
 docs/users_guide/flags.py                   |  309 +++++-
 docs/users_guide/flags.rst                  |   11 -
 docs/users_guide/ghci.rst                   |   21 +-
 docs/users_guide/glasgow_exts.rst           | 1397 +++++++++++----------------
 docs/users_guide/phases.rst                 |    7 +-
 docs/users_guide/safe_haskell.rst           |  102 +-
 docs/users_guide/what_glasgow_exts_does.rst |   62 +-
 8 files changed, 925 insertions(+), 1005 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 61f1b46e2a56fcb1e95dd1c4e87fb31940b3412d