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doc: formatting changes

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* doc/bison.texi: No changes in the output.
This commit is contained in:
Akim Demaille
2018-09-13 08:31:16 +02:00
parent 9ff76cdda8
commit ce99bc67b8
1 changed files with 17 additions and 19 deletions
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doc/bison.texi
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@@ -1175,14 +1175,13 @@ action in a GLR parser.
@cindex GLR parsers and @code{yylval}
@vindex yylloc
@cindex GLR parsers and @code{yylloc}
In any semantic action, you can examine @code{yychar} to determine the type of
the lookahead token present at the time of the associated reduction.
After checking that @code{yychar} is not set to @code{YYEMPTY} or @code{YYEOF},
you can then examine @code{yylval} and @code{yylloc} to determine the
lookahead token's semantic value and location, if any.
In a nondeferred semantic action, you can also modify any of these variables to
influence syntax analysis.
@xref{Lookahead, ,Lookahead Tokens}.
In any semantic action, you can examine @code{yychar} to determine the type
of the lookahead token present at the time of the associated reduction.
After checking that @code{yychar} is not set to @code{YYEMPTY} or
@code{YYEOF}, you can then examine @code{yylval} and @code{yylloc} to
determine the lookahead token's semantic value and location, if any. In a
nondeferred semantic action, you can also modify any of these variables to
influence syntax analysis. @xref{Lookahead, ,Lookahead Tokens}.
@findex yyclearin
@cindex GLR parsers and @code{yyclearin}
@@ -10423,16 +10422,15 @@ the corresponding short option and directive.
@node Yacc Library
@section Yacc Library
The Yacc library contains default implementations of the
@code{yyerror} and @code{main} functions. These default
implementations are normally not useful, but POSIX requires
them. To use the Yacc library, link your program with the
@option{-ly} option. Note that Bison's implementation of the Yacc
library is distributed under the terms of the GNU General
Public License (@pxref{Copying}).
The Yacc library contains default implementations of the @code{yyerror} and
@code{main} functions. These default implementations are normally not
useful, but POSIX requires them. To use the Yacc library, link your program
with the @option{-ly} option. Note that Bison's implementation of the Yacc
library is distributed under the terms of the GNU General Public License
(@pxref{Copying}).
If you use the Yacc library's @code{yyerror} function, you should
declare @code{yyerror} as follows:
If you use the Yacc library's @code{yyerror} function, you should declare
@code{yyerror} as follows:
@example
int yyerror (char const *);
@@ -12572,8 +12570,8 @@ Is Bison secure? Does it conform to POSIX?
If you're looking for a guarantee or certification, we don't provide it.
However, Bison is intended to be a reliable program that conforms to the
POSIX specification for Yacc. If you run into problems,
please send us a bug report.
POSIX specification for Yacc. If you run into problems, please send us a
bug report.
@node I can't build Bison
@section I can't build Bison