diff options
Diffstat (limited to 'doc/flex.texi')
| -rw-r--r-- | doc/flex.texi | 27 |
1 files changed, 10 insertions, 17 deletions
diff --git a/doc/flex.texi b/doc/flex.texi index af639f1..bccab1e 100644 --- a/doc/flex.texi +++ b/doc/flex.texi @@ -408,7 +408,7 @@ A somewhat more complicated example: "+"|"-"|"*"|"/" printf( "An operator: %s\n", yytext ); - "{"[\^{}}\n]*"}" /* eat up one-line comments */ + "{"[^{}\n]*"}" /* eat up one-line comments */ [ \t\n]+ /* eat up whitespace */ @@ -1491,15 +1491,14 @@ the scanning routine using a K&R-style/non-prototyped function declaration, you must terminate the definition with a semi-colon (;). @code{flex} generates @samp{C99} function definitions by -default. However flex does have the ability to generate obsolete, er, -@samp{traditional}, function definitions. This is to support +default. Flex used to have the ability to generate obsolete, er, +@samp{traditional}, function definitions. This was to support bootstrapping gcc on old systems. Unfortunately, traditional definitions prevent us from using any standard data types smaller than -int (such as short, char, or bool) as function arguments. For this -reason, future versions of @code{flex} may generate standard C99 code -only, leaving K&R-style functions to the historians. Currently, if you -do @strong{not} want @samp{C99} definitions, then you must use -@code{%option noansi-definitions}. +int (such as short, char, or bool) as function arguments. Furthermore, +traditional definitions support added extra complexity in the skeleton file. +For this reason, current versions of @code{flex} generate standard C99 code +only, leaving K&R-style functions to the historians. @cindex stdin, default for yyin @cindex yyin @@ -2183,7 +2182,7 @@ manages its own input buffer stack manually (instead of letting flex do it). } <<EOF>> { - if ( --include_stack_ptr 0 ) + if ( --include_stack_ptr == 0 ) { yyterminate(); } @@ -2860,19 +2859,13 @@ calls @code{yylex()} again). @opindex ---option-ansi-definitions @opindex ansi-definitions @item --ansi-definitions, @code{%option ansi-definitions} -instruct flex to generate ANSI C99 definitions for functions. -This option is enabled by default. -If @code{%option noansi-definitions} is specified, then the obsolete style -is generated. +Deprecated, ignored @anchor{option-ansi-prototypes} @opindex ---option-ansi-prototypes @opindex ansi-prototypes @item --ansi-prototypes, @code{%option ansi-prototypes} -instructs flex to generate ANSI C99 prototypes for functions. -This option is enabled by default. -If @code{noansi-prototypes} is specified, then -prototypes will have empty parameter lists. +Deprecated, ignored @anchor{option-bison-bridge} @opindex ---bison-bridge |