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* src/parse-gram.y (directives, directive, gram)

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(grammar_directives, precedence_directives, precedence_directive):
Rename as...
(declarations, declaration, grammar, grammar_declaration)
(precedence_declaration, precedence_declarator): these.
(symbol_declaration): New.
This commit is contained in:
Akim Demaille
2002-06-14 17:36:44 +00:00
parent 592e8d4d01
commit 2c5690250c
4 changed files with 265 additions and 252 deletions
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76
src/parse-gram.y
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@@ -85,11 +85,11 @@ int current_prec = 0;
%token PERCENT_TOKEN "%token"
%token PERCENT_NTERM "%nterm"
%token PERCENT_TYPE "%type"
%token PERCENT_TYPE "%type"
%token PERCENT_UNION "%union"
%token PERCENT_EXPECT "%expect"
%token PERCENT_START "%start"
%token PERCENT_LEFT "%left"
%token PERCENT_LEFT "%left"
%token PERCENT_RIGHT "%right"
%token PERCENT_NONASSOC "%nonassoc"
%token PERCENT_PREC "%prec"
@@ -123,31 +123,35 @@ int current_prec = 0;
%token PROLOGUE EPILOGUE
%token BRACED_CODE
%type <string> CHARACTER TYPE STRING string_content
%type <string> CHARACTER TYPE STRING string_content
BRACED_CODE PROLOGUE EPILOGUE epilogue.opt action
%type <integer> INT
%type <symbol> ID symbol string_as_id
%type <assoc> precedence_directive
%type <assoc> precedence_declarator
%%
input: { LOCATION_RESET (yylloc); }
directives "%%" gram epilogue.opt
declarations "%%" grammar epilogue.opt
{
yycontrol->errcode = 0;
epilogue_set ($5, @5);
}
;
directives:
/*------------------------------------.
| Declarations: before the first %%. |
`------------------------------------*/
declarations:
/* Nothing */
| directives directive
| declarations declaration
;
directive:
grammar_directives
| PROLOGUE
{
prologue_augment ($1, @1);
}
declaration:
grammar_declaration
| PROLOGUE { prologue_augment ($1, @1); }
| "%debug" { debug_flag = 1; }
| "%define" string_content string_content { muscle_insert ($2, $3); }
| "%defines" { defines_flag = 1; }
@@ -165,17 +169,27 @@ directive:
| "%yacc" { yacc_flag = 1; }
;
grammar_directives:
precedence_directives
| "%nterm" { current_class = nterm_sym; } symbol_defs.1
{
current_class = unknown_sym;
current_type = NULL;
}
grammar_declaration:
precedence_declaration
| symbol_declaration
| "%start" symbol
{
grammar_start_symbol_set ($2);
}
| "%union" BRACED_CODE semi_colon_opt
{
typed = 1;
MUSCLE_INSERT_INT ("stype_line", @2.first_line);
muscle_insert ("stype", $2);
}
;
symbol_declaration:
"%nterm" { current_class = nterm_sym; } symbol_defs.1
{
current_class = unknown_sym;
current_type = NULL;
}
| "%token" { current_class = token_sym; } symbol_defs.1
{
current_class = unknown_sym;
@@ -185,22 +199,16 @@ grammar_directives:
{
current_type = NULL;
}
| "%union" BRACED_CODE semi_colon_opt
{
typed = 1;
MUSCLE_INSERT_INT ("stype_line", @2.first_line);
muscle_insert ("stype", $2);
}
;
precedence_directives:
precedence_directive type.opt
precedence_declaration:
precedence_declarator type.opt
{ current_assoc = $1; ++current_prec; }
terms_to_prec.1
{ current_assoc = non_assoc; current_type = NULL; }
;
precedence_directive:
precedence_declarator:
"%left" { $$ = left_assoc; }
| "%right" { $$ = right_assoc; }
| "%nonassoc" { $$ = non_assoc; }
@@ -231,7 +239,6 @@ terms_to_prec.1:
}
;
/* One token definition. */
symbol_def:
TYPE
@@ -272,9 +279,14 @@ symbol_defs.1:
{;}
;
gram:
/*------------------------------------------.
| The grammar section: between the two %%. |
`------------------------------------------*/
grammar:
rules
| gram rules
| grammar rules
;
rules: