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revision 1.7 by akim, Wed Aug 15 08:37:52 2001 UTC revision 1.8 by pascal, Thu Sep 20 19:11:28 2001 UTC
# Line 1  Line 1 
1  Ceci est le fichier Info bison.info, produit par Makeinfo version 4.0b  This is bison.info, produced by makeinfo version 4.0b from
2  à partir bison.texinfo.  bison.texinfo.
3    
4  START-INFO-DIR-ENTRY  START-INFO-DIR-ENTRY
5  * bison: (bison).       GNU Project parser generator (yacc replacement).  * bison: (bison).       GNU Project parser generator (yacc replacement).
# Line 87  Examples Line 87  Examples
87    
88  Reverse Polish Notation Calculator  Reverse Polish Notation Calculator
89    
90  * Decls: Rpcalc Decls.  Bison and C declarations for rpcalc.  * Decls: Rpcalc Decls.  Prologue (declarations) for rpcalc.
91  * Rules: Rpcalc Rules.  Grammar Rules for rpcalc, with explanation.  * Rules: Rpcalc Rules.  Grammar Rules for rpcalc, with explanation.
92  * Lexer: Rpcalc Lexer.  The lexical analyzer.  * Lexer: Rpcalc Lexer.  The lexical analyzer.
93  * Main: Rpcalc Main.    The controlling function.  * Main: Rpcalc Main.    The controlling function.
# Line 119  Bison Grammar Files Line 119  Bison Grammar Files
119    
120  Outline of a Bison Grammar  Outline of a Bison Grammar
121    
122  * C Declarations::    Syntax and usage of the C declarations section.  * Prologue::          Syntax and usage of the prologue (declarations section).
123  * Bison Declarations::  Syntax and usage of the Bison declarations section.  * Bison Declarations::  Syntax and usage of the Bison declarations section.
124  * Grammar Rules::     Syntax and usage of the grammar rules section.  * Grammar Rules::     Syntax and usage of the grammar rules section.
125  * C Code::            Syntax and usage of the additional C code section.  * Epilogue::          Syntax and usage of the epilogue (additional code section).
126    
127  Defining Language Semantics  Defining Language Semantics
128    
# Line 981  The Overall Layout of a Bison Grammar Line 981  The Overall Layout of a Bison Grammar
981  general form of a Bison grammar file is as follows:  general form of a Bison grammar file is as follows:
982    
983       %{       %{
984       C DECLARATIONS       PROLOGUE (DECLARATIONS)
985       %}       %}
986            
987       BISON DECLARATIONS       BISON DECLARATIONS
# Line 989  general form of a Bison grammar file is Line 989  general form of a Bison grammar file is
989       %%       %%
990       GRAMMAR RULES       GRAMMAR RULES
991       %%       %%
992       ADDITIONAL C CODE       EPILOGUE (ADDITIONAL CODE)
993    
994  The `%%', `%{' and `%}' are punctuation that appears in every Bison  The `%%', `%{' and `%}' are punctuation that appears in every Bison
995  grammar file to separate the sections.  grammar file to separate the sections.
996    
997     The C declarations may define types and variables used in the     The prologue may define types and variables used in the actions. You
998  actions.  You can also use preprocessor commands to define macros used  can also use preprocessor commands to define macros used there, and use
999  there, and use `#include' to include header files that do any of these  `#include' to include header files that do any of these things.
 things.  
1000    
1001     The Bison declarations declare the names of the terminal and     The Bison declarations declare the names of the terminal and
1002  nonterminal symbols, and may also describe operator precedence and the  nonterminal symbols, and may also describe operator precedence and the
# Line 1006  data types of semantic values of various Line 1005  data types of semantic values of various
1005     The grammar rules define how to construct each nonterminal symbol     The grammar rules define how to construct each nonterminal symbol
1006  from its parts.  from its parts.
1007    
1008     The additional C code can contain any C code you want to use.  Often     The epilogue can contain any code you want to use. Often the
1009  the definition of the lexical analyzer `yylex' goes here, plus  definition of the lexical analyzer `yylex' goes here, plus subroutines
1010  subroutines called by the actions in the grammar rules.  In a simple  called by the actions in the grammar rules.  In a simple program, all
1011  program, all the rest of the program can go here.  the rest of the program can go here.
1012    
1013    
1014  File: bison.info,  Node: Examples,  Next: Grammar File,  Prev: Concepts,  Up: Top  File: bison.info,  Node: Examples,  Next: Grammar File,  Prev: Concepts,  Up: Top
# Line 1055  extension is a convention used for Bison Line 1054  extension is a convention used for Bison
1054    
1055  * Menu:  * Menu:
1056    
1057  * Decls: Rpcalc Decls.  Bison and C declarations for rpcalc.  * Decls: Rpcalc Decls.  Prologue (declarations) for rpcalc.
1058  * Rules: Rpcalc Rules.  Grammar Rules for rpcalc, with explanation.  * Rules: Rpcalc Rules.  Grammar Rules for rpcalc, with explanation.
1059  * Lexer: Rpcalc Lexer.  The lexical analyzer.  * Lexer: Rpcalc Lexer.  The lexical analyzer.
1060  * Main: Rpcalc Main.    The controlling function.  * Main: Rpcalc Main.    The controlling function.

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