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fixits: report duplicate %yacc directives

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We should use -ffixit and --update to clean files with duplicate
directives.  And we should complain only once about duplicate obsolete
directives: keep only the "duplicate" warning.  Let's start with %yacc.

For instance on:

    %fixed-output_files
    %fixed-output-files
    %yacc
    %%
    exp:

This run of bison:

    $ bison /tmp/foo.y -u
    foo.y:1.1-19: warning: deprecated directive, use '%fixed-output-files' [-Wdeprecated]
     %fixed-output_files
     ^~~~~~~~~~~~~~~~~~~
    foo.y:2.1-19: warning: duplicate directive [-Wother]
     %fixed-output-files
     ^~~~~~~~~~~~~~~~~~~
    foo.y:1.1-19: previous declaration
     %fixed-output_files
     ^~~~~~~~~~~~~~~~~~~
    foo.y:3.1-5: warning: duplicate directive [-Wother]
     %yacc
     ^~~~~
    foo.y:1.1-19: previous declaration
     %fixed-output_files
     ^~~~~~~~~~~~~~~~~~~
    bison: file 'foo.y' was updated (backup: 'foo.y~')

gives:

    %fixed-output-files
    %%
    exp:

* src/location.h, src/location.c (location_empty): New.
* src/complain.h, src/complain.c (duplicate_directive): New.

* src/getargs.h, src/getargs.c (yacc_flag): Instead of a Boolean, be
the location of the definition.
Update dependencies.

* src/scan-gram.l (%yacc, %fixed-output-files): Move the handling of
its warnings to...
* src/parse-gram.y (do_yacc): This new function.

* tests/input.at (Deprecated Directives): Adjust expectations.
This commit is contained in:
Akim Demaille
2019-01-16 07:45:54 +01:00
parent 2c8fb4d126
commit b6b397b7f0
11 changed files with 73 additions and 21 deletions
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13
src/complain.c
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@@ -399,6 +399,19 @@ deprecated_directive (location const *loc, char const *old, char const *upd)
fixits_register (loc, upd);
}
void
duplicate_directive (char const *directive,
location first, location second)
{
if (feature_flag & feature_caret)
complain (&second, Wother, _("duplicate directive"));
else
complain (&second, Wother, _("duplicate directive: %s"), directive);
unsigned i = SUB_INDENT;
complain_indent (&first, complaint, &i, _("previous declaration"));
fixits_register (&second, "");
}
void
duplicate_rule_directive (char const *directive,
location first, location second)