%{
#include "system.h"
+#include "complain.h"
#include "muscle_tab.h"
#include "files.h"
#include "getargs.h"
#include "output.h"
+#include "symlist.h"
#include "gram.h"
#include "reader.h"
#include "conflicts.h"
-/* Produce verbose parse errors. */
+/* Produce verbose syntax errors. */
#define YYERROR_VERBOSE 1
#define YYLLOC_DEFAULT(Current, Rhs, N) \
do { \
correctly typed access to it. */
#define yycontrol ((gram_control_t *) gram_control)
-/* Request detailed parse error messages, and pass them to
- GRAM_ERROR. */
+/* Request detailed syntax error messages, and pass them to GRAM_ERROR.
+ FIXME: depends on the undocumented availability of YYLLOC.t */
#undef yyerror
#define yyerror(Msg) \
- gram_error (yycontrol, &yylloc, Msg)
+ gram_error (&yylloc, Msg)
-/* When debugging our pure parser, we want to see values and locations
- of the tokens. */
#define YYPRINT(File, Type, Value) \
- yyprint (File, &yylloc, Type, &Value)
-static void yyprint (FILE *file, const location_t *loc,
- int type, const yystype *value);
+ yyprint (File, Type, &Value)
+static void yyprint (FILE *file, int type, const yystype *value);
symbol_class current_class = unknown_sym;
-char *current_type = 0;
+struniq_t current_type = 0;
symbol_t *current_lhs;
location_t current_lhs_location;
-associativity current_assoc;
+assoc_t current_assoc;
int current_prec = 0;
+braced_code_t current_braced_code = action_braced_code;
%}
%union
{
symbol_t *symbol;
+ symbol_list_t *list;
int integer;
char *string;
- associativity assoc;
+ assoc_t assoc;
+ struniq_t struniq;
};
-/* Define the tokens together with there human representation. */
-%token GRAM_EOF 0 "end of string"
-%token STRING CHARACTER
-%token INT
-
-%token PERCENT_TOKEN "%token"
-%token PERCENT_NTERM "%nterm"
-%token PERCENT_TYPE "%type"
-%token PERCENT_UNION "%union"
-%token PERCENT_EXPECT "%expect"
-%token PERCENT_START "%start"
-%token PERCENT_PREC "%prec"
-%token PERCENT_VERBOSE "%verbose"
-%token PERCENT_ERROR_VERBOSE "%error-verbose"
-
-%token PERCENT_OUTPUT "%output"
-%token PERCENT_FILE_PREFIX "%file-prefix"
-%token PERCENT_NAME_PREFIX "%name-prefix"
-
-%token PERCENT_DEFINE "%define"
-%token PERCENT_PURE_PARSER "%pure-parser"
-
-%token PERCENT_DEFINES "%defines"
-
-%token PERCENT_YACC "%yacc"
-
-%token PERCENT_DEBUG "%debug"
-%token PERCENT_LOCATIONS "%locations"
-%token PERCENT_NO_LINES "%no-lines"
-%token PERCENT_SKELETON "%skeleton"
-%token PERCENT_TOKEN_TABLE "%token-table"
-
-%token TYPE
-%token EQUAL "="
-%token SEMICOLON ";"
-%token COLON ":"
-%token PIPE "|"
-%token ID "identifier"
+/* Define the tokens together with their human representation. */
+%token GRAM_EOF 0 "end of file"
+%token STRING "string"
+%token INT "integer"
+
+%token PERCENT_TOKEN "%token"
+%token PERCENT_NTERM "%nterm"
+
+%token PERCENT_TYPE "%type"
+%token PERCENT_DESTRUCTOR "%destructor"
+%token PERCENT_PRINTER "%printer"
+
+%token PERCENT_UNION "%union"
+
+%token PERCENT_LEFT "%left"
+%token PERCENT_RIGHT "%right"
+%token PERCENT_NONASSOC "%nonassoc"
+
+%token PERCENT_PREC "%prec"
+%token PERCENT_DPREC "%dprec"
+%token PERCENT_MERGE "%merge"
+
+
+/*----------------------.
+| Global Declarations. |
+`----------------------*/
+
+%token
+ PERCENT_DEBUG "%debug"
+ PERCENT_DEFINE "%define"
+ PERCENT_DEFINES "%defines"
+ PERCENT_ERROR_VERBOSE "%error-verbose"
+ PERCENT_EXPECT "%expect"
+ PERCENT_FILE_PREFIX "%file-prefix"
+ PERCENT_GLR_PARSER "%glr-parser"
+ PERCENT_LEX_PARAM "%lex-param"
+ PERCENT_LOCATIONS "%locations"
+ PERCENT_NAME_PREFIX "%name-prefix"
+ PERCENT_NO_LINES "%no-lines"
+ PERCENT_OUTPUT "%output"
+ PERCENT_PARSE_PARAM "%parse-param"
+ PERCENT_PURE_PARSER "%pure-parser"
+ PERCENT_SKELETON "%skeleton"
+ PERCENT_START "%start"
+ PERCENT_TOKEN_TABLE "%token-table"
+ PERCENT_VERBOSE "%verbose"
+ PERCENT_YACC "%yacc"
+;
+
+%token TYPE "type"
+%token EQUAL "="
+%token SEMICOLON ";"
+%token COLON ":"
+%token COMMA ","
+%token PIPE "|"
+%token ID "identifier"
%token PERCENT_PERCENT "%%"
-%token PROLOGUE EPILOGUE
-%token BRACED_CODE
+%token PROLOGUE "%{...%}"
+%token EPILOGUE "epilogue"
+%token BRACED_CODE "{...}"
+
-%type <string> CHARACTER TYPE STRING string_content
- BRACED_CODE PROLOGUE EPILOGUE epilogue.opt action
+%type <string> STRING string_content
+ BRACED_CODE code_content action
+ PROLOGUE EPILOGUE
+%type <struniq> TYPE
%type <integer> INT
%type <symbol> ID symbol string_as_id
%type <assoc> precedence_declarator
-
+%type <list> symbols.1
%%
input:
declarations "%%" grammar epilogue.opt
{
yycontrol->errcode = 0;
- epilogue_set ($4, @4);
}
;
| "%error-verbose" { error_verbose = 1; }
| "%expect" INT { expected_conflicts = $2; }
| "%file-prefix" "=" string_content { spec_file_prefix = $3; }
+| "%glr-parser" { glr_parser = 1; }
+| "%lex-param" code_content "," code_content
+ {
+ muscle_pair_list_grow ("lex_param", $2, $4);
+ scanner_last_string_free ();
+ }
| "%locations" { locations_flag = 1; }
| "%name-prefix" "=" string_content { spec_name_prefix = $3; }
| "%no-lines" { no_lines_flag = 1; }
| "%output" "=" string_content { spec_outfile = $3; }
+| "%parse-param" code_content "," code_content
+ {
+ muscle_pair_list_grow ("parse_param", $2, $4);
+ scanner_last_string_free ();
+ }
| "%pure-parser" { pure_parser = 1; }
| "%skeleton" string_content { skeleton = $2; }
| "%token-table" { token_table_flag = 1; }
MUSCLE_INSERT_INT ("stype_line", @2.first_line);
muscle_insert ("stype", $2);
}
+| "%destructor"
+ { current_braced_code = destructor_braced_code; }
+ BRACED_CODE symbols.1
+ {
+ symbol_list_t *list;
+ for (list = $4; list; list = list->next)
+ symbol_destructor_set (list->sym, $3, @3);
+ symbol_list_free ($4);
+ current_braced_code = action_braced_code;
+ }
+| "%printer"
+ { current_braced_code = printer_braced_code; }
+ BRACED_CODE symbols.1
+ {
+ symbol_list_t *list;
+ for (list = $4; list; list = list->next)
+ symbol_printer_set (list->sym, $3, list->location);
+ symbol_list_free ($4);
+ current_braced_code = action_braced_code;
+ }
;
symbol_declaration:
current_class = unknown_sym;
current_type = NULL;
}
-| "%type" TYPE {current_type = $2; } nterms_to_type.1
+| "%type" TYPE symbols.1
{
- current_type = NULL;
+ symbol_list_t *list;
+ for (list = $3; list; list = list->next)
+ symbol_type_set (list->sym, $2, @2);
+ symbol_list_free ($3);
}
;
precedence_declaration:
- precedence_declarator type.opt
- { current_assoc = $1; ++current_prec; }
- terms_to_prec.1
- { current_assoc = non_assoc; current_type = NULL; }
+ precedence_declarator type.opt symbols.1
+ {
+ symbol_list_t *list;
+ ++current_prec;
+ for (list = $3; list; list = list->next)
+ {
+ symbol_type_set (list->sym, current_type, @2);
+ symbol_precedence_set (list->sym, current_prec, $1, @1);
+ }
+ symbol_list_free ($3);
+ current_type = NULL;
+ }
;
-%token PERCENT_LEFT "%left";
-%token PERCENT_RIGHT "%right";
-%token PERCENT_NONASSOC "%nonassoc";
precedence_declarator:
"%left" { $$ = left_assoc; }
| "%right" { $$ = right_assoc; }
;
type.opt:
- /* Nothing. */ { current_type = NULL;}
+ /* Nothing. */ { current_type = NULL; }
| TYPE { current_type = $1; }
;
/* One or more nonterminals to be %typed. */
-nterms_to_type.1:
- ID { symbol_type_set ($1, current_type); }
-| nterms_to_type.1 ID { symbol_type_set ($2, current_type); }
-;
-/* One or more symbols to be given a precedence/associativity. */
-terms_to_prec.1:
- symbol
- {
- symbol_type_set ($1, current_type);
- symbol_precedence_set ($1, current_prec, current_assoc);
- }
-| terms_to_prec.1 symbol
- {
- symbol_type_set ($2, current_type);
- symbol_precedence_set ($2, current_prec, current_assoc);
- }
+symbols.1:
+ symbol { $$ = symbol_list_new ($1, @1); }
+| symbols.1 symbol { $$ = symbol_list_prepend ($1, $2, @2); }
;
/* One token definition. */
}
| ID
{
- symbol_class_set ($1, current_class);
- symbol_type_set ($1, current_type);
+ symbol_class_set ($1, current_class, @1);
+ symbol_type_set ($1, current_type, @1);
}
| ID INT
{
- symbol_class_set ($1, current_class);
- symbol_type_set ($1, current_type);
- symbol_user_token_number_set ($1, $2);
+ symbol_class_set ($1, current_class, @1);
+ symbol_type_set ($1, current_type, @1);
+ symbol_user_token_number_set ($1, $2, @2);
}
| ID string_as_id
{
- symbol_class_set ($1, current_class);
- symbol_type_set ($1, current_type);
- symbol_make_alias ($1, $2);
+ symbol_class_set ($1, current_class, @1);
+ symbol_type_set ($1, current_type, @1);
+ symbol_make_alias ($1, $2, @$);
}
| ID INT string_as_id
{
- symbol_class_set ($1, current_class);
- symbol_type_set ($1, current_type);
- symbol_user_token_number_set ($1, $2);
- symbol_make_alias ($1, $3);
+ symbol_class_set ($1, current_class, @1);
+ symbol_type_set ($1, current_type, @1);
+ symbol_user_token_number_set ($1, $2, @2);
+ symbol_make_alias ($1, $3, @$);
}
;
rules_or_grammar_declaration:
rules
| grammar_declaration ";"
+ {
+ if (yacc_flag)
+ complain_at (@$, _("POSIX forbids declarations in the grammar"));
+ }
+| error ";"
+ {
+ yyerrok;
+ }
;
rules:
| rhs action
{ grammar_current_rule_action_append ($2, @2); }
| rhs "%prec" symbol
- { grammar_current_rule_prec_set ($3); }
+ { grammar_current_rule_prec_set ($3, @3); }
+| rhs "%dprec" INT
+ { grammar_current_rule_dprec_set ($3, @3); }
+| rhs "%merge" TYPE
+ { grammar_current_rule_merge_set ($3, @3); }
;
symbol:
ID { $$ = $1; }
| string_as_id { $$ = $1; }
-| CHARACTER { $$ = getsym ($1); }
;
action:
string_as_id:
STRING
{
- $$ = getsym ($1);
- symbol_class_set ($$, token_sym);
+ $$ = symbol_get ($1, @1);
+ symbol_class_set ($$, token_sym, @1);
}
;
};
+/* A BRACED_CODE used for its contents. Strip the braces. */
+code_content:
+ BRACED_CODE
+ {
+ $$ = $1 + 1;
+ $$[strlen ($$) - 1] = '\0';
+ };
+
+
epilogue.opt:
/* Nothing. */
- {
- $$ = xstrdup ("");
- }
| "%%" EPILOGUE
{
- $$ = $2;
+ epilogue_augment ($2, @2);
+ scanner_last_string_free ();
}
;
static void
yyprint (FILE *file,
- const location_t *loc, int type, const yystype *value)
+ int type, const yystype *value)
{
- fputs (" (", file);
- LOCATION_PRINT (file, *loc);
- fputs (")", file);
+ fputc (' ', file);
switch (type)
{
- case CHARACTER:
- fprintf (file, " = '%s'", value->string);
- break;
-
case ID:
fprintf (file, " = %s", value->symbol->tag);
break;
break;
case TYPE:
- fprintf (file, " = <%s>", value->string);
+ fprintf (file, " = <%s>", value->struniq);
break;
case BRACED_CODE:
case EPILOGUE:
fprintf (file, " = {{ %s }}", value->string);
break;
+
+ default:
+ fprintf (file, "unknown token type");
+ break;
}
}
void
-gram_error (gram_control_t *control ATTRIBUTE_UNUSED,
- location_t *yylloc, const char *msg)
+gram_error (location_t *yylloc, const char *msg)
{
- LOCATION_PRINT (stderr, *yylloc);
- fprintf (stderr, ": %s\n", msg);
+ complain_at (*yylloc, "%s", msg);
}
projects / bison.git / blobdiff