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(Parser Function, Pure Calling, Error Reporting, Table of Symbols):

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%parse-param and %lex-param now take just one argument, the
declaration; the argument name is deduced from the declaration.
This commit is contained in:
Paul Eggert
2002-11-29 08:43:12 +00:00
parent 78c3da9e09
commit feeb0edaf1
1 changed files with 20 additions and 19 deletions
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doc/bison.texinfo
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@@ -3847,19 +3847,20 @@ If you use a reentrant parser, you can optionally pass additional
parameter information to it in a reentrant way. To do so, use the
declaration @code{%parse-param}:
@deffn {Directive} %parse-param @{@var{argument-declaration}@}, @{@var{argument-name}@}
@deffn {Directive} %parse-param @{@var{argument-declaration}@}
@findex %parse-param
Declare that @code{argument-name} is an additional @code{yyparse}
argument. This argument is also passed to @code{yyerror}. The
@var{argument-declaration} is used when declaring functions or
prototypes.
Declare that an argument declared by @code{argument-declaration} is an
additional @code{yyparse} argument. This argument is also passed to
@code{yyerror}. The @var{argument-declaration} is used when declaring
functions or prototypes. The last identifier in
@var{argument-declaration} must be the argument name.
@end deffn
Here's an example. Write this in the parser:
@example
%parse-param @{int *nastiness@}, @{nastiness@}
%parse-param @{int *randomness@}, @{randomness@}
%parse-param @{int *nastiness@}
%parse-param @{int *randomness@}
@end example
@noindent
@@ -4090,18 +4091,18 @@ If you wish to pass the additional parameter data to @code{yylex}, use
@code{%lex-param} just like @code{%parse-param} (@pxref{Parser
Function}).
@deffn {Directive} lex-param @{@var{argument-declaration}@}, @{@var{argument-name}@}
@deffn {Directive} lex-param @{@var{argument-declaration}@}
@findex %lex-param
Declare that @code{argument-name} is an additional @code{yylex}
argument.
Declare that @code{argument-declaration} is an additional @code{yylex}
argument declaration.
@end deffn
For instance:
@example
%parse-param @{int *nastiness@}, @{nastiness@}
%lex-param @{int *nastiness@}, @{nastiness@}
%parse-param @{int *randomness@}, @{randomness@}
%parse-param @{int *nastiness@}
%lex-param @{int *nastiness@}
%parse-param @{int *randomness@}
@end example
@noindent
@@ -4190,7 +4191,7 @@ void yyerror (const char *msg); /* Yacc parsers. */
void yyerror (YYLTYPE *locp, const char *msg); /* GLR parsers. */
@end example
If @samp{%parse-param @{int *nastiness@}, @{nastiness@}} is used, then:
If @samp{%parse-param @{int *nastiness@}} is used, then:
@example
void yyerror (int *randomness, const char *msg); /* Yacc parsers. */
@@ -4207,10 +4208,10 @@ convention of @code{yylex} @emph{and} the calling convention of
%locations
/* Pure yylex. */
%pure-parser
%lex-param @{int *nastiness@}, @{nastiness@}
%lex-param @{int *nastiness@}
/* Pure yyparse. */
%parse-param @{int *nastiness@}, @{nastiness@}
%parse-param @{int *randomness@}, @{randomness@}
%parse-param @{int *nastiness@}
%parse-param @{int *randomness@}
@end example
@noindent
@@ -6498,7 +6499,7 @@ Bison declaration to assign left associativity to token(s).
@xref{Precedence Decl, ,Operator Precedence}.
@end deffn
@deffn {Directive} %lex-param @{@var{argument-declaration}@}. @{@var{argument-name}"@}
@deffn {Directive} %lex-param @{@var{argument-declaration}@}
Bison declaration to specifying an additional parameter that
@code{yylex} should accept. @xref{Pure Calling,, Calling Conventions
for Pure Parsers}.
@@ -6530,7 +6531,7 @@ Bison declaration to set the name of the parser file. @xref{Decl
Summary}.
@end deffn
@deffn {Directive} %parse-param @{@var{argument-declaration}@}, @{@var{argument-name}@}
@deffn {Directive} %parse-param @{@var{argument-declaration}@}
Bison declaration to specifying an additional parameter that
@code{yyparse} should accept. @xref{Parser Function,, The Parser
Function @code{yyparse}}.