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744171ddbf
Currently pstate_new does not set up its variables, this task is left to yypush_parse. This was probably to share more code with usual pull parsers, where these (local) variables are indeed initialized by yyparse. But as a consequence yyexpected_tokens crashes at the very beginning of the parse, since, for instance, the stacks are not even set up. See https://lists.gnu.org/r/bison-patches/2020-03/msg00001.html. The fix could have very simple, but the documentation actually makes it very clear that we can reuse a pstate for several parses: After yypush_parse returns a status other than YYPUSH_MORE, the parser instance yyps may be reused for a new parse. so we need to restore the parser to its pristine state so that (i) it is ready to run the next parse, (ii) it properly supports yyexpected_tokens for the next run. * data/skeletons/yacc.c (b4_initialize_parser_state_variables): New, extracted from the top of yyparse/yypush_parse. (yypstate_clear): New. (yypstate_new): Use it when push parsers are enabled. Define after the yyps macros so that we can use the same code as the regular pull parsers. (yyparse): Use it when push parsers are _not_ enabled. * examples/c/bistromathic/bistromathic.test: Check the completion on the beginning of the line.
35 lines
1.2 KiB
Makefile
35 lines
1.2 KiB
Makefile
## Copyright (C) 2020 Free Software Foundation, Inc.
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##
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## This program is free software: you can redistribute it and/or modify
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## it under the terms of the GNU General Public License as published by
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## the Free Software Foundation, either version 3 of the License, or
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## (at your option) any later version.
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##
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## This program is distributed in the hope that it will be useful,
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## but WITHOUT ANY WARRANTY; without even the implied warranty of
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## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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## GNU General Public License for more details.
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##
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## You should have received a copy of the GNU General Public License
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## along with this program. If not, see <http://www.gnu.org/licenses/>.
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bistromathicdir = $(docdir)/%D%
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## --------------- ##
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## Bistromathics. ##
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## --------------- ##
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check_PROGRAMS += %D%/bistromathic
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TESTS += %D%/bistromathic.test
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EXTRA_DIST += %D%/bistromathic.test
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nodist_%C%_bistromathic_SOURCES = %D%/parse.y %D%/parse.h
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%D%/parse.c: $(dependencies)
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# Don't use gnulib's system headers.
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%C%_bistromathic_CPPFLAGS = -I$(top_srcdir)/%D% -I$(top_builddir)/%D%
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%C%_bistromathic_LDADD = -lm -lreadline
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dist_bistromathic_DATA = %D%/parse.y %D%/Makefile %D%/README.md
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CLEANFILES += %D%/parse.[ch] %D%/parse.output
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CLEANDIRS += %D%/*.dSYM
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