definition, which is kept in the header @file{calc.h}, is as follows. It
provides for either functions or variables to be placed in the table.
-@c FIXME: ANSIfy the prototypes for FNCTPTR etc.
@smallexample
@group
+/* Fonctions type. */
+typedef double (*func_t) (double);
+
/* Data type for links in the chain of symbols. */
struct symrec
@{
char *name; /* name of symbol */
int type; /* type of symbol: either VAR or FNCT */
- union @{
- double var; /* value of a VAR */
- double (*fnctptr)(); /* value of a FNCT */
+ union
+ @{
+ double var; /* value of a VAR */
+ func_t fnctptr; /* value of a FNCT */
@} value;
struct symrec *next; /* link field */
@};
/* The symbol table: a chain of `struct symrec'. */
extern symrec *sym_table;
-symrec *putsym ();
-symrec *getsym ();
+symrec *putsym (const char *, func_t);
+symrec *getsym (const char *);
@end group
@end smallexample
struct init
@{
char *fname;
- double (*fnct)();
+ double (*fnct)(double);
@};
@end group
@group
struct init arith_fncts[] =
@{
- "sin", sin,
- "cos", cos,
+ "sin", sin,
+ "cos", cos,
"atan", atan,
- "ln", log,
- "exp", exp,
+ "ln", log,
+ "exp", exp,
"sqrt", sqrt,
0, 0
@};
/* The symbol table: a chain of `struct symrec'. */
-symrec *sym_table = (symrec *)0;
+symrec *sym_table = (symrec *) 0;
@end group
@group
Declare the expected number of shift-reduce conflicts
(@pxref{Expect Decl, ,Suppressing Conflict Warnings}).
+@item %yacc
+@itemx %fixed_output_files
+Pretend the option @option{--yacc} was given, i.e., imitate Yacc,
+including its naming conventions. @xref{Bison Options}, for more.
+
@item %locations
Generate the code processing the locations (@pxref{Action Features,
,Special Features for Use in Actions}). This mode is enabled as soon as
Request a pure (reentrant) parser program (@pxref{Pure Decl, ,A Pure
(Reentrant) Parser}).
+@item %no_parser
+Do not include any C code in the parser file; generate tables only. The
+parser file contains just @code{#define} directives and static variable
+declarations.
+
+This option also tells Bison to write the C code for the grammar actions
+into a file named @file{@var{filename}.act}, in the form of a
+brace-surrounded body fit for a @code{switch} statement.
+
@item %no_lines
Don't generate any @code{#line} preprocessor commands in the parser
file. Ordinarily Bison writes these commands in the parser file so that
associate errors with the parser file, treating it an independent source
file in its own right.
-@item %raw
-The output file @file{@var{name}.h} normally defines the tokens with
-Yacc-compatible token numbers. If this option is specified, the
-internal Bison numbers are used instead. (Yacc-compatible numbers start
-at 257 except for single-character tokens; Bison assigns token numbers
-sequentially for all tokens starting at 3.)
+@item %debug
+Output a definition of the macro @code{YYDEBUG} into the parser file, so
+that the debugging facilities are compiled. @xref{Debugging, ,Debugging
+Your Parser}.
+
+@item %defines
+Write an extra output file containing macro definitions for the token
+type names defined in the grammar and the semantic value type
+@code{YYSTYPE}, as well as a few @code{extern} variable declarations.
+
+If the parser output file is named @file{@var{name}.c} then this file
+is named @file{@var{name}.h}.@refill
+
+This output file is essential if you wish to put the definition of
+@code{yylex} in a separate source file, because @code{yylex} needs to
+be able to refer to token type codes and the variable
+@code{yylval}. @xref{Token Values, ,Semantic Values of Tokens}.@refill
+
+@item %verbose
+Write an extra output file containing verbose descriptions of the
+parser states and what is done for each type of look-ahead token in
+that state.
+
+This file also describes all the conflicts, both those resolved by
+operator precedence and the unresolved ones.
+
+The file's name is made by removing @samp{.tab.c} or @samp{.c} from
+the parser output file name, and adding @samp{.output} instead.@refill
+
+Therefore, if the input file is @file{foo.y}, then the parser file is
+called @file{foo.tab.c} by default. As a consequence, the verbose
+output file is called @file{foo.output}.@refill
@item %token_table
Generate an array of token names in the parser file. The name of the
Tuning the parser:
@table @option
+@item -S @var{file}
+@itemx --skeleton=@var{file}
+Specify the skeleton to use. You probably don't need this option unless
+you are developing Bison.
+
@item -t
@itemx --debug
-Output a definition of the macro @code{YYDEBUG} into the parser file,
-so that the debugging facilities are compiled. @xref{Debugging, ,Debugging Your Parser}.
+Output a definition of the macro @code{YYDEBUG} into the parser file, so
+that the debugging facilities are compiled. @xref{Debugging, ,Debugging
+Your Parser}.
@item --locations
Pretend that @code{%locactions} was specified. @xref{Decl Summary}.
@item -n
@itemx --no-parser
-Do not include any C code in the parser file; generate tables only. The
-parser file contains just @code{#define} directives and static variable
-declarations.
-
-This option also tells Bison to write the C code for the grammar actions
-into a file named @file{@var{filename}.act}, in the form of a
-brace-surrounded body fit for a @code{switch} statement.
-
-@item -r
-@itemx --raw
-Pretend that @code{%raw} was specified. @xref{Decl Summary}.
+Pretend that @code{%no_parser} was specified. @xref{Decl Summary}.
@item -k
@itemx --token-table
@table @option
@item -d
@itemx --defines
-Write an extra output file containing macro definitions for the token
-type names defined in the grammar and the semantic value type
-@code{YYSTYPE}, as well as a few @code{extern} variable declarations.
-
-If the parser output file is named @file{@var{name}.c} then this file
-is named @file{@var{name}.h}.@refill
-
-This output file is essential if you wish to put the definition of
-@code{yylex} in a separate source file, because @code{yylex} needs to
-be able to refer to token type codes and the variable
-@code{yylval}. @xref{Token Values, ,Semantic Values of Tokens}.@refill
+Pretend that @code{%verbose} was specified, i.e., write an extra output
+file containing macro definitions for the token type names defined in
+the grammar and the semantic value type @code{YYSTYPE}, as well as a few
+@code{extern} variable declarations. @xref{Decl Summary}.
@item -b @var{file-prefix}
@itemx --file-prefix=@var{prefix}
@item -v
@itemx --verbose
-Write an extra output file containing verbose descriptions of the
-parser states and what is done for each type of look-ahead token in
-that state.
-
-This file also describes all the conflicts, both those resolved by
-operator precedence and the unresolved ones.
-
-The file's name is made by removing @samp{.tab.c} or @samp{.c} from
-the parser output file name, and adding @samp{.output} instead.@refill
-
-Therefore, if the input file is @file{foo.y}, then the parser file is
-called @file{foo.tab.c} by default. As a consequence, the verbose
-output file is called @file{foo.output}.@refill
+Pretend that @code{%verbose} was specified, i.e, write an extra output
+file containing verbose descriptions of the grammar and
+parser. @xref{Decl Summary}, for more.
@item -o @var{outfile}
@itemx --output-file=@var{outfile}
\line{ --no-lines \leaderfill -l}
\line{ --no-parser \leaderfill -n}
\line{ --output-file \leaderfill -o}
-\line{ --raw \leaderfill -r}
\line{ --token-table \leaderfill -k}
\line{ --verbose \leaderfill -v}
\line{ --version \leaderfill -V}
--no-lines -l
--no-parser -n
--output-file=@var{outfile} -o @var{outfile}
---raw -r
--token-table -k
--verbose -v
--version -V
The parser function produced by Bison; call this function to start
parsing. @xref{Parser Function, ,The Parser Function @code{yyparse}}.
+@item %debug
+Equip the parser for debugging. @xref{Decl Summary}.
+
+@item %defines
+Bison declaration to create a header file meant for the scanner.
+@xref{Decl Summary}.
+
@item %left
Bison declaration to assign left associativity to token(s).
@xref{Precedence Decl, ,Operator Precedence}.
Bison declaration to request a pure (reentrant) parser.
@xref{Pure Decl, ,A Pure (Reentrant) Parser}.
-@item %raw
-Bison declaration to use Bison internal token code numbers in token
-tables instead of the usual Yacc-compatible token code numbers.
-@xref{Decl Summary}.
-
@item %right
Bison declaration to assign right associativity to token(s).
@xref{Precedence Decl, ,Operator Precedence}.
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