[PATCH 0/4] {maint} caret errors

[Theophile Ranquet]

These patches introduce caret errors into Bison. For example,

    err.y:4.5-8: error: invalid reference: '$foo'
     C: {$foo{bar} };
         ^^^^

This feature is activated by invoking Bison with -fcaret.  This may very well
become the default option is future release the default option is future
releases.

I started implementing this in master, and as I rebased these changes into
maint I noticed that some parts of the code made it difficult to support caret
errors in some situations.  Therefore, the carets introduced now are a bit
lacking in some aspects, sorry about that.  As a rule of thumb, don't be
surprised if carets are absent from certain errors, this is the only easy way
to keep a sane output (that I know of at the moment).

Also, the option right now is called "--flags", but I don't find this very
insightful, so maybe we should call it "--features" or something instead? I am
well aware that users will prefer the shorthand -f anyways, so this decision is
not life changing :)


Theophile Ranquet (4):
  getargs: add support for --flags/-f
  errors: show carets
  tests: check carets
  doc: document carets

 NEWS                |  13 +++++
 doc/bison.texi      |  44 ++++++++++++++++
 src/complain.c      |   3 ++
 src/getargs.c       |  40 +++++++++++++-
 src/getargs.h       |  12 +++++
 src/location.c      |  71 +++++++++++++++++++++++++
 src/location.h      |   5 ++
 src/main.c          |   2 +
 tests/actions.at    |   9 ++++
 tests/conflicts.at  |   4 ++
 tests/input.at      | 146 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 tests/named-refs.at | 121 +++++++++++++++++++++++++++++++++++++++++++
 tests/reduce.at     |  55 ++++++++++++++++++++
 tests/regression.at |   8 +++
 14 files changed, 531 insertions(+), 2 deletions(-)

-- 
1.8.0