Minor code cleanup.

[bison.git] / src / parse-gram.y

diff --git a/src/parse-gram.y b/src/parse-gram.y
index b05ce2bd7439682752db06c2c6c92eeb20677b28..bcc257145fb692254a43c0619d20b7327dcd3db7 100644 (file)
--- a/src/parse-gram.y
+++ b/src/parse-gram.y
@@ -27,6 +27,7 @@
 #include "getargs.h"
 #include "gram.h"
 #include "muscle_tab.h"
+#include "named-ref.h"
 #include "quotearg.h"
 #include "reader.h"
 #include "symlist.h"
@@ -63,6 +64,7 @@ static symbol_class current_class = unknown_sym;
 static uniqstr current_type = NULL;
 static symbol *current_lhs;
 static location current_lhs_location;
+static named_ref *current_lhs_named_ref;
 static int current_prec = 0;
 
 #define YYTYPE_INT16 int_fast16_t
@@ -98,6 +100,7 @@ static int current_prec = 0;
   assoc assoc;
   uniqstr uniqstr;
   unsigned char character;
+  named_ref *named_ref;
 };
 
 /* Define the tokens together with their human representation.  */
@@ -157,6 +160,7 @@ static int current_prec = 0;
 ;
 
 %token BRACED_CODE     "{...}"
+%token BRACKETED_ID    "[identifier]"
 %token CHAR            "char"
 %token EPILOGUE        "epilogue"
 %token EQUAL           "="
@@ -182,20 +186,23 @@ static int current_prec = 0;
 %printer { fprintf (stderr, "{\n%s\n}", $$); }
         braceless content.opt "{...}" "%{...%}" EPILOGUE
 
-%type <uniqstr> TYPE ID ID_COLON variable
-%printer { fprintf (stderr, "<%s>", $$); } TYPE
-%printer { fputs ($$, stderr); } ID variable
+%type <uniqstr> BRACKETED_ID ID ID_COLON TYPE variable
+%printer { fputs ($$, stderr); } <uniqstr>
+%printer { fprintf (stderr, "[%s]", $$); } BRACKETED_ID
 %printer { fprintf (stderr, "%s:", $$); } ID_COLON
+%printer { fprintf (stderr, "<%s>", $$); } TYPE
 
 %type <integer> INT
-%printer { fprintf (stderr, "%d", $$); } INT
+%printer { fprintf (stderr, "%d", $$); } <integer>
 
-%type <symbol> id id_colon symbol symbol.prec string_as_id
-%printer { fprintf (stderr, "%s", $$->tag); } id symbol string_as_id
+%type <symbol> id id_colon string_as_id symbol symbol.prec
+%printer { fprintf (stderr, "%s", $$->tag); } <symbol>
 %printer { fprintf (stderr, "%s:", $$->tag); } id_colon
 
 %type <assoc> precedence_declarator
 %type <list>  symbols.1 symbols.prec generic_symlist generic_symlist_item
+%type <named_ref> named_ref.opt
+
 %%
 
 input:
@@ -519,7 +526,8 @@ rules_or_grammar_declaration:
 ;
 
 rules:
-  id_colon { current_lhs = $1; current_lhs_location = @1; } rhses.1
+  id_colon named_ref.opt { current_lhs = $1; current_lhs_location = @1;
+    current_lhs_named_ref = $2; } rhses.1
 ;
 
 rhses.1:
@@ -530,11 +538,12 @@ rhses.1:
 
 rhs:
   /* Nothing.  */
-    { grammar_current_rule_begin (current_lhs, current_lhs_location); }
-| rhs symbol
-    { grammar_current_rule_symbol_append ($2, @2); }
-| rhs "{...}"
-    { grammar_current_rule_action_append ($2, @2); }
+    { grammar_current_rule_begin (current_lhs, current_lhs_location,
+                                 current_lhs_named_ref); }
+| rhs symbol named_ref.opt
+    { grammar_current_rule_symbol_append ($2, @2, $3); }
+| rhs "{...}" named_ref.opt
+    { grammar_current_rule_action_append ($2, @2, $3); }
 | rhs "%prec" symbol
     { grammar_current_rule_prec_set ($3, @3); }
 | rhs "%dprec" INT
@@ -543,6 +552,12 @@ rhs:
     { grammar_current_rule_merge_set ($3, @3); }
 ;
 
+named_ref.opt:
+  /* Nothing. */ { $$ = 0; }
+|
+  BRACKETED_ID   { $$ = named_ref_new($1, @1); }
+;
+
 
 /*----------------------------*
  | variable and content.opt.  |
@@ -558,6 +573,7 @@ variable:
 /* Some content or empty by default. */
 content.opt:
   /* Nothing. */   { $$ = ""; }
+| ID { $$ = $1; }
 | STRING
 ;