X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/ef1b427325c10362bd5880c22de310ed96dbc235..e0c653e7e660c353c59b054de571474450aa4c92:/src/parse-gram.y diff --git a/src/parse-gram.y b/src/parse-gram.y index 9c59e737..cada04f7 100644 --- a/src/parse-gram.y +++ b/src/parse-gram.y @@ -1,7 +1,7 @@ %{/* Bison Grammar Parser -*- C -*- - Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, - Inc. + Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software + Foundation, Inc. This file is part of Bison, the GNU Compiler Compiler. @@ -21,8 +21,6 @@ #include #include "system.h" -#include - #include "complain.h" #include "conflicts.h" #include "files.h" @@ -117,6 +115,7 @@ static int current_prec = 0; %token PERCENT_LEFT "%left" %token PERCENT_RIGHT "%right" %token PERCENT_NONASSOC "%nonassoc" +%token PERCENT_PRECEDENCE "%precedence" %token PERCENT_PREC "%prec" %token PERCENT_DPREC "%dprec" @@ -168,9 +167,9 @@ static int current_prec = 0; %token PIPE "|" %token PROLOGUE "%{...%}" %token SEMICOLON ";" -%token TYPE "type" -%token TYPE_TAG_ANY "<*>" -%token TYPE_TAG_NONE "<>" +%token TAG "" +%token TAG_ANY "<*>" +%token TAG_NONE "<>" %type CHAR %printer { fputs (char_name ($$), stderr); } CHAR @@ -184,20 +183,20 @@ static int current_prec = 0; %printer { fprintf (stderr, "{\n%s\n}", $$); } braceless content.opt "{...}" "%{...%}" EPILOGUE -%type TYPE ID ID_COLON variable -%printer { fprintf (stderr, "<%s>", $$); } TYPE +%type TAG ID ID_COLON variable +%printer { fprintf (stderr, "<%s>", $$); } TAG %printer { fputs ($$, stderr); } ID variable %printer { fprintf (stderr, "%s:", $$); } ID_COLON %type INT %printer { fprintf (stderr, "%d", $$); } INT -%type id id_colon symbol string_as_id +%type id id_colon symbol symbol.prec string_as_id %printer { fprintf (stderr, "%s", $$->tag); } id symbol string_as_id %printer { fprintf (stderr, "%s:", $$->tag); } id_colon %type precedence_declarator -%type symbols.1 generic_symlist generic_symlist_item +%type symbols.1 symbols.prec generic_symlist generic_symlist_item %% input: @@ -256,7 +255,7 @@ prologue_declaration: muscle_code_grow ("initial_action", action.code, @2); code_scanner_last_string_free (); } -| "%language" STRING { language_argmatch ($2, 1, &@1); } +| "%language" STRING { language_argmatch ($2, grammar_prio, @1); } | "%lex-param" "{...}" { add_param ("lex_param", $2, @2); } | "%locations" { locations_flag = true; } | "%name-prefix" STRING { spec_name_prefix = $2; } @@ -302,7 +301,7 @@ prologue_declaration: skeleton_user = uniqstr_new (skeleton_build); free (skeleton_build); } - skeleton_arg (skeleton_user, 1, &@1); + skeleton_arg (skeleton_user, grammar_prio, @1); } | "%token-table" { token_table_flag = true; } | "%verbose" { report_flag |= report_states; } @@ -354,9 +353,9 @@ grammar_declaration: ; -/*----------* - | %union. | - *----------*/ +/*---------. +| %union. | +`---------*/ %token PERCENT_UNION "%union"; @@ -388,7 +387,7 @@ symbol_declaration: current_class = unknown_sym; current_type = NULL; } -| "%type" TYPE symbols.1 +| "%type" TAG symbols.1 { symbol_list *list; tag_seen = true; @@ -399,7 +398,7 @@ symbol_declaration: ; precedence_declaration: - precedence_declarator type.opt symbols.1 + precedence_declarator tag.opt symbols.prec { symbol_list *list; ++current_prec; @@ -414,16 +413,30 @@ precedence_declaration: ; precedence_declarator: - "%left" { $$ = left_assoc; } -| "%right" { $$ = right_assoc; } -| "%nonassoc" { $$ = non_assoc; } + "%left" { $$ = left_assoc; } +| "%right" { $$ = right_assoc; } +| "%nonassoc" { $$ = non_assoc; } +| "%precedence" { $$ = precedence_assoc; } ; -type.opt: +tag.opt: /* Nothing. */ { current_type = NULL; } -| TYPE { current_type = $1; tag_seen = true; } +| TAG { current_type = $1; tag_seen = true; } +; + +/* Just like symbols.1 but accept INT for the sake of POSIX. */ +symbols.prec: + symbol.prec + { $$ = symbol_list_sym_new ($1, @1); } +| symbols.prec symbol.prec + { $$ = symbol_list_prepend ($1, symbol_list_sym_new ($2, @2)); } ; +symbol.prec: + symbol { $$ = $1; } + | symbol INT { $$ = $1; symbol_user_token_number_set ($1, $2, @2); } + ; + /* One or more symbols to be %typed. */ symbols.1: symbol @@ -438,15 +451,15 @@ generic_symlist: ; generic_symlist_item: - symbol { $$ = symbol_list_sym_new ($1, @1); } -| TYPE { $$ = symbol_list_type_new ($1, @1); } -| "<*>" { $$ = symbol_list_default_tagged_new (@1); } -| "<>" { $$ = symbol_list_default_tagless_new (@1); } + symbol { $$ = symbol_list_sym_new ($1, @1); } +| TAG { $$ = symbol_list_type_new ($1, @1); } +| "<*>" { $$ = symbol_list_default_tagged_new (@1); } +| "<>" { $$ = symbol_list_default_tagless_new (@1); } ; /* One token definition. */ symbol_def: - TYPE + TAG { current_type = $1; tag_seen = true; @@ -525,19 +538,19 @@ rhs: { grammar_current_rule_prec_set ($3, @3); } | rhs "%dprec" INT { grammar_current_rule_dprec_set ($3, @3); } -| rhs "%merge" TYPE +| rhs "%merge" TAG { grammar_current_rule_merge_set ($3, @3); } ; -/*----------------------------* - | variable and content.opt. | - *---------------------------*/ +/*---------------------------. +| variable and content.opt. | +`---------------------------*/ variable: ID - | STRING { $$ = uniqstr_new ($1); } /* deprecated and not M4-friendly */ - ; +| STRING { $$ = uniqstr_new ($1); } /* deprecated and not M4-friendly */ +; /* Some content or empty by default. */ content.opt: @@ -549,9 +562,9 @@ content.opt: ; -/*-------------* - | braceless. | - *-------------*/ +/*------------. +| braceless. | +`------------*/ braceless: "{...}" @@ -566,9 +579,9 @@ braceless: ; -/*---------------* - | Identifiers. | - *---------------*/ +/*--------------. +| Identifiers. | +`--------------*/ /* Identifiers are returned as uniqstr values by the scanner. Depending on their use, we may need to make them genuine symbols. */