%{/* Bison Grammar Parser -*- C -*-
- Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301 USA
*/
+#include <config.h>
#include "system.h"
+#include <strverscmp.h>
+
#include "complain.h"
#include "conflicts.h"
#include "files.h"
#include "getargs.h"
#include "gram.h"
#include "muscle_tab.h"
-#include "output.h"
+#include "quotearg.h"
#include "reader.h"
#include "symlist.h"
+#include "scan-gram.h"
+#include "scan-code.h"
#define YYLLOC_DEFAULT(Current, Rhs, N) (Current) = lloc_default (Rhs, N)
static YYLTYPE lloc_default (YYLTYPE const *, int);
#define YY_LOCATION_PRINT(File, Loc) \
- location_print (File, Loc)
+ location_print (File, Loc)
+
+static void version_check (location const *loc, char const *version);
/* Request detailed syntax error messages, and pass them to GRAM_ERROR.
FIXME: depends on the undocumented availability of YYLLOC. */
#undef yyerror
#define yyerror(Msg) \
- gram_error (&yylloc, Msg)
+ gram_error (&yylloc, Msg)
static void gram_error (location const *, char const *);
-#define YYPRINT(File, Type, Value) \
- print_token_value (File, Type, &Value)
-static void print_token_value (FILE *, int, YYSTYPE const *);
+static char const *char_name (char);
+
+/** Add a lex-param or a parse-param.
+ *
+ * \param type \a lex_param or \a parse_param
+ * \param decl the formal argument
+ * \param loc the location in the source.
+ */
+static void add_param (char const *type, char *decl, location loc);
-static void add_param (char const *, char *, location);
-symbol_class current_class = unknown_sym;
-uniqstr current_type = 0;
-symbol *current_lhs;
-location current_lhs_location;
-assoc current_assoc;
-int current_prec = 0;
+static symbol_class current_class = unknown_sym;
+static uniqstr current_type = NULL;
+static symbol *current_lhs;
+static location current_lhs_location;
+static int current_prec = 0;
+
+#define YYTYPE_INT16 int_fast16_t
+#define YYTYPE_INT8 int_fast8_t
+#define YYTYPE_UINT16 uint_fast16_t
+#define YYTYPE_UINT8 uint_fast8_t
%}
%debug
+%verbose
%defines
%locations
%pure-parser
%error-verbose
%defines
%name-prefix="gram_"
+%expect 0
%initial-action
{
/* Bison's grammar can initial empty locations, hence a default
location is needed. */
- @$.start.file = @$.end.file = current_file;
- @$.start.line = @$.end.line = 1;
- @$.start.column = @$.end.column = 0;
+ boundary_set (&@$.start, current_file, 1, 1);
+ boundary_set (&@$.end, current_file, 1, 1);
}
/* Only NUMBERS have a value. */
char *chars;
assoc assoc;
uniqstr uniqstr;
+ unsigned char character;
};
/* Define the tokens together with their human representation. */
%token PERCENT_NTERM "%nterm"
%token PERCENT_TYPE "%type"
-%token PERCENT_DESTRUCTOR "%destructor {...}"
-%token PERCENT_PRINTER "%printer {...}"
-
-%token PERCENT_UNION "%union {...}"
+%token PERCENT_DESTRUCTOR "%destructor"
+%token PERCENT_PRINTER "%printer"
+%token PERCENT_SYMBOL_DEFAULT
+ "%symbol-default"
%token PERCENT_LEFT "%left"
%token PERCENT_RIGHT "%right"
`----------------------*/
%token
+ PERCENT_AFTER_HEADER "%after-header"
+ PERCENT_BEFORE_HEADER "%before-header"
PERCENT_DEBUG "%debug"
PERCENT_DEFAULT_PREC "%default-prec"
PERCENT_DEFINE "%define"
PERCENT_DEFINES "%defines"
+ PERCENT_END_HEADER "%end-header"
PERCENT_ERROR_VERBOSE "%error-verbose"
PERCENT_EXPECT "%expect"
PERCENT_EXPECT_RR "%expect-rr"
PERCENT_FILE_PREFIX "%file-prefix"
PERCENT_GLR_PARSER "%glr-parser"
- PERCENT_INITIAL_ACTION "%initial-action {...}"
- PERCENT_LEX_PARAM "%lex-param {...}"
+ PERCENT_INITIAL_ACTION "%initial-action"
+ PERCENT_LEX_PARAM "%lex-param"
PERCENT_LOCATIONS "%locations"
PERCENT_NAME_PREFIX "%name-prefix"
PERCENT_NO_DEFAULT_PREC "%no-default-prec"
PERCENT_NO_LINES "%no-lines"
PERCENT_NONDETERMINISTIC_PARSER
- "%nondeterministic-parser"
+ "%nondeterministic-parser"
PERCENT_OUTPUT "%output"
- PERCENT_PARSE_PARAM "%parse-param {...}"
+ PERCENT_PARSE_PARAM "%parse-param"
PERCENT_PURE_PARSER "%pure-parser"
+ PERCENT_PUSH_PARSER "%push-parser"
+ PERCENT_REQUIRE "%require"
PERCENT_SKELETON "%skeleton"
PERCENT_START "%start"
+ PERCENT_START_HEADER "%start-header"
PERCENT_TOKEN_TABLE "%token-table"
PERCENT_VERBOSE "%verbose"
PERCENT_YACC "%yacc"
;
-%token TYPE "type"
+%token BRACED_CODE "{...}"
+%token CHAR "char"
+%token EPILOGUE "epilogue"
%token EQUAL "="
-%token SEMICOLON ";"
-%token PIPE "|"
%token ID "identifier"
%token ID_COLON "identifier:"
%token PERCENT_PERCENT "%%"
+%token PIPE "|"
%token PROLOGUE "%{...%}"
-%token EPILOGUE "epilogue"
-%token BRACED_CODE "{...}"
+%token SEMICOLON ";"
+%token TYPE "type"
+
+%type <character> CHAR
+%printer { fputs (char_name ($$), stderr); } CHAR
+
+/* braceless is not to be used for rule or symbol actions, as it
+ calls translate_code. */
+%type <chars> STRING "{...}" "%{...%}" EPILOGUE braceless content content.opt
+%printer { fputs (quotearg_style (c_quoting_style, $$), stderr); }
+ STRING
+%printer { fprintf (stderr, "{\n%s\n}", $$); }
+ braceless content content.opt "{...}" "%{...%}" EPILOGUE
+%type <uniqstr> TYPE ID ID_COLON
+%printer { fprintf (stderr, "<%s>", $$); } TYPE
+%printer { fputs ($$, stderr); } ID
+%printer { fprintf (stderr, "%s:", $$); } ID_COLON
-%type <chars> STRING string_content
- "%destructor {...}"
- "%initial-action {...}"
- "%lex-param {...}"
- "%parse-param {...}"
- "%printer {...}"
- "%union {...}"
- BRACED_CODE action
- PROLOGUE EPILOGUE
-%type <uniqstr> TYPE
%type <integer> INT
-%type <symbol> ID ID_COLON symbol string_as_id
+%printer { fprintf (stderr, "%d", $$); } INT
+
+%type <symbol> id id_colon symbol string_as_id
+%printer { fprintf (stderr, "%s", $$->tag); } id symbol string_as_id
+%printer { fprintf (stderr, "%s:", $$->tag); } id_colon
+
%type <assoc> precedence_declarator
-%type <list> symbols.1
+%type <list> symbols.1 generic_symlist generic_symlist_item
%%
input:
- declarations "%%" grammar epilogue.opt
+ prologue_declarations "%%" grammar epilogue.opt
;
| Declarations: before the first %%. |
`------------------------------------*/
-declarations:
+prologue_declarations:
/* Nothing */
-| declarations declaration
+| prologue_declarations prologue_declaration
;
-declaration:
+prologue_declaration:
grammar_declaration
-| PROLOGUE { prologue_augment ($1, @1); }
-| "%debug" { debug_flag = true; }
-| "%define" string_content string_content { muscle_insert ($2, $3); }
-| "%defines" { defines_flag = true; }
-| "%error-verbose" { error_verbose = true; }
-| "%expect" INT { expected_sr_conflicts = $2; }
-| "%expect-rr" INT { expected_rr_conflicts = $2; }
-| "%file-prefix" "=" string_content { spec_file_prefix = $3; }
+| "%{...%}" { prologue_augment (translate_code ($1, @1), @1, union_seen); }
+| "%after-header" braceless { prologue_augment ($2, @2, true); }
+| "%before-header" braceless { prologue_augment ($2, @2, false); }
+| "%debug" { debug_flag = true; }
+| "%define" STRING content.opt { muscle_insert ($2, $3); }
+| "%defines" { defines_flag = true; }
+| "%end-header" braceless { muscle_code_grow ("end_header", $2, @2); }
+| "%error-verbose" { error_verbose = true; }
+| "%expect" INT { expected_sr_conflicts = $2; }
+| "%expect-rr" INT { expected_rr_conflicts = $2; }
+| "%file-prefix" "=" STRING { spec_file_prefix = $3; }
| "%glr-parser"
- {
- nondeterministic_parser = true;
- glr_parser = true;
- }
-| "%initial-action {...}"
- {
- muscle_code_grow ("initial_action", $1, @1);
- }
-| "%lex-param {...}" { add_param ("lex_param", $1, @1); }
-| "%locations" { locations_flag = true; }
-| "%name-prefix" "=" string_content { spec_name_prefix = $3; }
-| "%no-lines" { no_lines_flag = true; }
-| "%nondeterministic-parser" { nondeterministic_parser = true; }
-| "%output" "=" string_content { spec_outfile = $3; }
-| "%parse-param {...}" { add_param ("parse_param", $1, @1); }
-| "%pure-parser" { pure_parser = true; }
-| "%skeleton" string_content { skeleton = $2; }
-| "%token-table" { token_table_flag = true; }
-| "%verbose" { report_flag = report_states; }
-| "%yacc" { yacc_flag = true; }
+ {
+ nondeterministic_parser = true;
+ glr_parser = true;
+ }
+| "%initial-action" "{...}"
+ {
+ muscle_code_grow ("initial_action", translate_symbol_action ($2, @2), @2);
+ }
+| "%lex-param" "{...}" { add_param ("lex_param", $2, @2); }
+| "%locations" { locations_flag = true; }
+| "%name-prefix" "=" STRING { spec_name_prefix = $3; }
+| "%no-lines" { no_lines_flag = true; }
+| "%nondeterministic-parser" { nondeterministic_parser = true; }
+| "%output" "=" STRING { spec_outfile = $3; }
+| "%parse-param" "{...}" { add_param ("parse_param", $2, @2); }
+| "%pure-parser" { pure_parser = true; }
+| "%push-parser" { push_parser = true; }
+| "%require" STRING { version_check (&@2, $2); }
+| "%skeleton" STRING { skeleton = $2; }
+| "%start-header" braceless { muscle_code_grow ("start_header", $2, @2); }
+| "%token-table" { token_table_flag = true; }
+| "%verbose" { report_flag = report_states; }
+| "%yacc" { yacc_flag = true; }
| /*FIXME: Err? What is this horror doing here? */ ";"
;
{
grammar_start_symbol_set ($2, @2);
}
-| "%union {...}"
- {
- typed = true;
- MUSCLE_INSERT_INT ("stype_line", @1.start.line);
- muscle_insert ("stype", $1);
- }
-| "%destructor {...}" symbols.1
+| "%destructor" "{...}" generic_symlist
{
symbol_list *list;
- for (list = $2; list; list = list->next)
- symbol_destructor_set (list->sym, $1, @1);
- symbol_list_free ($2);
+ const char *action = translate_symbol_action ($2, @2);
+ for (list = $3; list; list = list->next)
+ symbol_list_destructor_set (list, action, @2);
+ symbol_list_free ($3);
}
-| "%printer {...}" symbols.1
+| "%printer" "{...}" generic_symlist
{
symbol_list *list;
- for (list = $2; list; list = list->next)
- symbol_printer_set (list->sym, $1, list->location);
- symbol_list_free ($2);
+ const char *action = translate_symbol_action ($2, @2);
+ for (list = $3; list; list = list->next)
+ symbol_list_printer_set (list, action, @2);
+ symbol_list_free ($3);
}
| "%default-prec"
{
}
;
+
+/*----------*
+ | %union. |
+ *----------*/
+
+%token PERCENT_UNION "%union";
+
+union_name:
+ /* Nothing. */ {}
+| ID { muscle_code_grow ("union_name", $1, @1); }
+;
+
+grammar_declaration:
+ "%union" union_name "{...}"
+ {
+ char const *body = $3;
+
+ /* Concatenate the %union bodies. If this is the first %union, make sure
+ the synchronization line appears after the opening '{' so as not to
+ confuse Doxygen. Otherwise, turn the previous %union's trailing '}'
+ into '\n', and omit the new %union's leading '{'. */
+ if (!union_seen)
+ {
+ muscle_grow ("stype", "{", "");
+ }
+ else
+ {
+ char *code = muscle_find ("stype");
+ code[strlen (code) - 1] = '\n';
+ }
+ body++;
+
+ union_seen = true;
+ muscle_code_grow ("stype", body, @3);
+ }
+;
+
+
+
+
symbol_declaration:
"%nterm" { current_class = nterm_sym; } symbol_defs.1
{
| "%type" TYPE symbols.1
{
symbol_list *list;
+ tag_seen = true;
for (list = $3; list; list = list->next)
- symbol_type_set (list->sym, $2, @2);
+ symbol_type_set (list->content.sym, $2, @2);
symbol_list_free ($3);
}
;
++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_type_set (list->content.sym, current_type, @2);
+ symbol_precedence_set (list->content.sym, current_prec, $1, @1);
}
symbol_list_free ($3);
current_type = NULL;
type.opt:
/* Nothing. */ { current_type = NULL; }
-| TYPE { current_type = $1; }
+| TYPE { current_type = $1; tag_seen = true; }
;
-/* One or more nonterminals to be %typed. */
-
+/* One or more symbols to be %typed. */
symbols.1:
- symbol { $$ = symbol_list_new ($1, @1); }
-| symbols.1 symbol { $$ = symbol_list_prepend ($1, $2, @2); }
+ symbol
+ { $$ = symbol_list_sym_new ($1, @1); }
+| symbols.1 symbol
+ { $$ = symbol_list_prepend ($1, symbol_list_sym_new ($2, @2)); }
+;
+
+generic_symlist:
+ generic_symlist_item { $$ = $1; }
+| generic_symlist generic_symlist_item { $$ = symbol_list_prepend ($1, $2); }
+;
+
+generic_symlist_item:
+ symbol { $$ = symbol_list_sym_new ($1, @1); }
+| TYPE { $$ = symbol_list_type_new ($1, @1); }
+| "%symbol-default" { $$ = symbol_list_default_new (@1); }
;
/* One token definition. */
TYPE
{
current_type = $1;
+ tag_seen = true;
}
-| ID
+| id
{
- symbol_class_set ($1, current_class, @1);
+ symbol_class_set ($1, current_class, @1, true);
symbol_type_set ($1, current_type, @1);
}
-| ID INT
+| id INT
{
- symbol_class_set ($1, current_class, @1);
+ symbol_class_set ($1, current_class, @1, true);
symbol_type_set ($1, current_type, @1);
symbol_user_token_number_set ($1, $2, @2);
}
-| ID string_as_id
+| id string_as_id
{
- symbol_class_set ($1, current_class, @1);
+ symbol_class_set ($1, current_class, @1, true);
symbol_type_set ($1, current_type, @1);
symbol_make_alias ($1, $2, @$);
}
-| ID INT string_as_id
+| id INT string_as_id
{
- symbol_class_set ($1, current_class, @1);
+ symbol_class_set ($1, current_class, @1, true);
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:
- ID_COLON { current_lhs = $1; current_lhs_location = @1; } rhses.1
+ id_colon { current_lhs = $1; current_lhs_location = @1; } rhses.1
;
rhses.1:
- rhs { grammar_rule_end (@1); }
-| rhses.1 "|" rhs { grammar_rule_end (@3); }
+ rhs { grammar_current_rule_end (@1); }
+| rhses.1 "|" rhs { grammar_current_rule_end (@3); }
| rhses.1 ";"
;
rhs:
/* Nothing. */
- { grammar_rule_begin (current_lhs, current_lhs_location); }
+ { grammar_current_rule_begin (current_lhs, current_lhs_location); }
| rhs symbol
{ grammar_current_rule_symbol_append ($2, @2); }
-| rhs action
+| rhs "{...}"
{ grammar_current_rule_action_append ($2, @2); }
| rhs "%prec" symbol
{ grammar_current_rule_prec_set ($3, @3); }
{ grammar_current_rule_merge_set ($3, @3); }
;
-symbol:
- ID { $$ = $1; }
-| string_as_id { $$ = $1; }
+
+/*-----------*
+ | content. |
+ *-----------*/
+
+content:
+ STRING
+| braceless
;
-action:
- BRACED_CODE
- { $$ = $1; }
+/* Some content or "1" by default. */
+content.opt:
+ /* Nothing. */
+ {
+ static char one[] = "1";
+ $$ = one;
+ }
+| content
;
-/* A string used as an ID: we have to keep the quotes. */
-string_as_id:
- STRING
+
+braceless:
+ "{...}"
{
- $$ = symbol_get ($1, @1);
- symbol_class_set ($$, token_sym, @1);
+ $1[strlen ($1) - 1] = '\n';
+ $$ = translate_code ($1 + 1, @1);
}
;
-/* A string used for its contents. Strip the quotes. */
-string_content:
- STRING
+
+/*---------------*
+ | Identifiers. |
+ *---------------*/
+
+/* Identifiers are returned as uniqstr values by the scanner.
+ Depending on their use, we may need to make them genuine symbols. */
+
+id:
+ ID
+ { $$ = symbol_from_uniqstr ($1, @1); }
+| CHAR
{
- $$ = $1 + 1;
- $$[strlen ($$) - 1] = '\0';
- };
+ $$ = symbol_get (char_name ($1), @1);
+ symbol_class_set ($$, token_sym, @1, false);
+ symbol_user_token_number_set ($$, $1, @1);
+ }
+;
+
+id_colon:
+ ID_COLON { $$ = symbol_from_uniqstr ($1, @1); }
+;
+symbol:
+ id
+| string_as_id
+;
+
+/* A string used as an ID: quote it. */
+string_as_id:
+ STRING
+ {
+ $$ = symbol_get (quotearg_style (c_quoting_style, $1), @1);
+ symbol_class_set ($$, token_sym, @1, false);
+ }
+;
+
epilogue.opt:
/* Nothing. */
| "%%" EPILOGUE
{
- muscle_code_grow ("epilogue", $2, @2);
- scanner_last_string_free ();
+ muscle_code_grow ("epilogue", translate_code ($2, @2), @2);
+ gram_scanner_last_string_free ();
}
;
static void
add_param (char const *type, char *decl, location loc)
{
- static char const alphanum[] =
- "0123456789"
+ static char const alphanum[26 + 26 + 1 + 10] =
"abcdefghijklmnopqrstuvwxyz"
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
- "_";
- static char const blank[] = " \t";
- char const *alpha = alphanum + 10;
+ "_"
+ "0123456789";
char const *name_start = NULL;
char *p;
- for (p = decl; *p; p++)
- if ((p == decl || ! strchr (alphanum, p[-1])) && strchr (alpha, p[0]))
+ /* Stop on last actual character. */
+ for (p = decl; p[1]; p++)
+ if ((p == decl
+ || ! memchr (alphanum, p[-1], sizeof alphanum))
+ && memchr (alphanum, p[0], sizeof alphanum - 10))
name_start = p;
- /* Strip the surrounding '{' and '}'. */
- decl++;
- *--p = '\0';
-
- /* Strip surrounding white spaces. */
- while (strchr (blank, *decl))
- ++decl;
- while (strchr (blank, p[-1]))
- *--p = '\0';
+ /* Strip the surrounding '{' and '}', and any blanks just inside
+ the braces. */
+ while (*--p == ' ' || *p == '\t')
+ continue;
+ p[1] = '\0';
+ while (*++decl == ' ' || *decl == '\t')
+ continue;
if (! name_start)
complain_at (loc, _("missing identifier in parameter declaration"));
size_t name_len;
for (name_len = 1;
- name_start[name_len] && strchr (alphanum, name_start[name_len]);
+ memchr (alphanum, name_start[name_len], sizeof alphanum);
name_len++)
continue;
free (name);
}
- scanner_last_string_free ();
+ gram_scanner_last_string_free ();
}
-/*----------------------------------------------------.
-| When debugging the parser, display tokens' values. |
-`----------------------------------------------------*/
static void
-print_token_value (FILE *file, int type, YYSTYPE const *value)
+version_check (location const *loc, char const *version)
{
- fputc (' ', file);
- switch (type)
+ if (strverscmp (version, PACKAGE_VERSION) > 0)
{
- case ID:
- fprintf (file, " = %s", value->symbol->tag);
- break;
-
- case INT:
- fprintf (file, " = %d", value->integer);
- break;
-
- case STRING:
- fprintf (file, " = \"%s\"", value->chars);
- break;
-
- case TYPE:
- fprintf (file, " = <%s>", value->uniqstr);
- break;
-
- case BRACED_CODE:
- case PERCENT_DESTRUCTOR:
- case PERCENT_LEX_PARAM:
- case PERCENT_PARSE_PARAM:
- case PERCENT_PRINTER:
- case PERCENT_UNION:
- case PROLOGUE:
- case EPILOGUE:
- fprintf (file, " = {{ %s }}", value->chars);
- break;
-
- default:
- fprintf (file, "unknown token type");
- break;
+ complain_at (*loc, "require bison %s, but have %s",
+ version, PACKAGE_VERSION);
+ exit (63);
}
}
char const *
token_name (int type)
{
- return yytname[type];
+ return yytname[YYTRANSLATE (type)];
+}
+
+static char const *
+char_name (char c)
+{
+ if (c == '\'')
+ return "'\\''";
+ else
+ {
+ char buf[4];
+ buf[0] = '\''; buf[1] = c; buf[2] = '\''; buf[3] = '\0';
+ return quotearg_style (escape_quoting_style, buf);
+ }
}
projects / bison.git / blobdiff