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.
b6b397b7f0