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doc: document yypstate_expected_tokens

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* doc/bison.texi (Push Parser Interface): Here.
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Akim Demaille
2020-05-06 08:11:24 +02:00
parent 9661b2fcbc
commit dc2a3578b7
1 changed files with 19 additions and 0 deletions
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doc/bison.texi
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@@ -7085,6 +7085,25 @@ The value returned by @code{yypull_parse} is the same as for @code{yyparse}.
The parser instance @code{yyps} may be reused for new parses.
@end deftypefun
@deftypefun int yypstate_expected_tokens (@code{const yypstate *}yyps, @code{yysymbol_kind_t} @var{argv}@code{[]}, @code{int} @var{argc})
Fill @var{argv} with the expected tokens, which never includes
@code{YYSYMBOL_YYEMPTY}, @code{YYSYMBOL_YYerror}, or
@code{YYSYMBOL_YYUNDEF}.
Never put more than @var{argc} elements into @var{argv}, and on success
return the number of tokens stored in @var{argv}. If there are more
expected tokens than @var{argc}, fill @var{argv} up to @var{argc} and return
0. If there are no expected tokens, also return 0, but set @code{argv[0]}
to @code{YYSYMBOL_YYEMPTY}.
When LAC is enabled, may return a negative number on errors,
such as @code{YYENOMEM} on memory exhaustion.
If @var{argv} is null, return the size needed to store all the possible
values, which is always less than @code{YYNTOKENS}.
@end deftypefun
@node Lexical
@section The Lexical Analyzer Function @code{yylex}
@findex yylex