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6571c2d1b1
Currently, occurrences of these identifiers in the user's input yield spurious warnings. To tell the difference between a legitimate m4_foo from the user, and a bad m4_foo coming from a non-evaluated macro of a skeleton, escape the user's identifiers as m4@'_foo. We already use @' as a special sequence to be stripped from the skeleton's output. See <https://lists.gnu.org/r/bug-bison/2021-10/msg00026.html> and previous commit ("warnings: be less picky about occurrences of m4_/b4_ in the output"). * src/flex-scanner.h (OBSTACK_SGROW): New. * src/output.c (output_escaped): Escape m4_ and b4_. * src/scan-code.l: Likewise. * src/system.h (obstack_escape): Likewise. And rewrite as a function. * tests/skeletons.at (Suspicious sequences): Make sure the user can use m4_foo/b4_foo without spurious warnings.
AT_BISON_OPTION_PUSHDEFS/AT_BISON_OPTION_POPDEFS
These two macros must be given the (main) directives so that they define a number of other macros to:
- what the language is (so what compiler tool chain to use, what definition of yylex/yyerror, etc.)
- what skeleton is used
Keywords
The following keywords are used to label tests (with AT_KEYWORDS(category)). Please follow them and avoid creating synonyms.
- action
- api.value.type
- c++: c++ language
- cex: counterexamples.
- d: d language
- deprec: deprecated features.
- diagnostics
- glr
- graph
- html: html reports
- java
- lac
- %merge
- multistart
- push
- report: for automaton dumps
- %union
- variant
- yacc: POSIX yacc (%yacc)
Calculator
The grammar features several special directives:
!!YYERROR!+YYACCEPT!-YYABORT!*YYNOMEM