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* doc/autoconf.texi: Document @$.

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(Locations): New section.
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Akim Demaille
2001-08-01 17:49:14 +00:00
parent 73975f004c
commit 847bf1f538
11 changed files with 579 additions and 275 deletions
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@@ -1,5 +1,5 @@
Ceci est le fichier Info bison.info, produit par Makeinfo version 4.0 à
partir bison.texinfo.
Ceci est le fichier Info bison.info, produit par Makeinfo version 4.0b
à partir bison.texinfo.
START-INFO-DIR-ENTRY
* bison: (bison). GNU Project parser generator (yacc replacement).
@@ -28,6 +28,48 @@ License", "Conditions for Using Bison" and this permission notice may be
included in translations approved by the Free Software Foundation
instead of in the original English.

File: bison.info, Node: Rpcalc Decls, Next: Rpcalc Rules, Up: RPN Calc
Declarations for `rpcalc'
-------------------------
Here are the C and Bison declarations for the reverse polish notation
calculator. As in C, comments are placed between `/*...*/'.
/* Reverse polish notation calculator. */
%{
#define YYSTYPE double
#include <math.h>
%}
%token NUM
%% /* Grammar rules and actions follow */
The C declarations section (*note The C Declarations Section: C
Declarations.) contains two preprocessor directives.
The `#define' directive defines the macro `YYSTYPE', thus specifying
the C data type for semantic values of both tokens and groupings (*note
Data Types of Semantic Values: Value Type.). The Bison parser will use
whatever type `YYSTYPE' is defined as; if you don't define it, `int' is
the default. Because we specify `double', each token and each
expression has an associated value, which is a floating point number.
The `#include' directive is used to declare the exponentiation
function `pow'.
The second section, Bison declarations, provides information to
Bison about the token types (*note The Bison Declarations Section:
Bison Declarations.). Each terminal symbol that is not a
single-character literal must be declared here. (Single-character
literals normally don't need to be declared.) In this example, all the
arithmetic operators are designated by single-character literals, so the
only terminal symbol that needs to be declared is `NUM', the token type
for numeric constants.

File: bison.info, Node: Rpcalc Rules, Next: Rpcalc Lexer, Prev: Rpcalc Decls, Up: RPN Calc
@@ -870,6 +912,7 @@ grammar.
* Rules:: How to write grammar rules.
* Recursion:: Writing recursive rules.
* Semantics:: Semantic values and actions.
* Locations:: Locations and actions.
* Declarations:: All kinds of Bison declarations are described here.
* Multiple Parsers:: Putting more than one Bison parser in one program.
@@ -1172,7 +1215,7 @@ defines two mutually-recursive nonterminals, since each refers to the
other.

File: bison.info, Node: Semantics, Next: Declarations, Prev: Recursion, Up: Grammar File
File: bison.info, Node: Semantics, Next: Locations, Prev: Recursion, Up: Grammar File
Defining Language Semantics
===========================