* data/c.m4 (b4_yydestruct_generate, b4_symbol_actions): New.

[bison.git] / data / c.m4

diff --git a/data/c.m4 b/data/c.m4
index b67a44384c12fca19e62cf1c5ea1cda4df30eb6d..d6de2a935a992feed89a8d964e9cc0edd4763981 100644 (file)
--- a/data/c.m4
+++ b/data/c.m4
@@ -320,3 +320,50 @@ m4_define([b4_c_arg],
 m4_define([b4_syncline],
 [m4_if(b4_synclines_flag, 1,
        [[#]line $1 $2])])
+
+
+# b4_symbol_actions(FILENAME, LINENO,
+#                   SYMBOL-TAG, SYMBOL-NUM,
+#                   SYMBOL-ACTION, SYMBOL-TYPENAME)
+# -------------------------------------------------
+m4_define([b4_symbol_actions],
+[m4_pushdef([b4_dollar_dollar], [yyvalue.$6])dnl
+m4_pushdef([b4_at_dollar], [yylocation])dnl
+      case $4: /* $3 */
+b4_syncline([$2], [$1])
+        $5;
+b4_syncline([@oline@], [@ofile@])
+        break;
+m4_popdef([b4_at_dollar])dnl
+m4_popdef([b4_dollar_dollar])dnl
+])
+
+
+# b4_yydestruct_generate(FUNTION-DECLARATOR)
+# ------------------------------------------
+# Generate the "yydestruct" function, which declaration is issued using
+# FUNTION-DECLARATOR, which may be "b4_c_ansi_function_def" for ISO C
+# or "b4_c_function_def" for K&R.
+m4_define([b4_yydestruct_generate],
+[[/*-----------------------------------------------.
+| Release the memory associated to this symbol.  |
+`-----------------------------------------------*/
+
+]$1([yydestruct],
+    [static void],
+    [[int yytype],         [yytype]],
+    [[YYSTYPE yyvalue],    [yyvalue]]b4_location_if([,
+    [[YYLTYPE yylocation], [yylocation]]]))[
+{
+  /* Pacify ``unused variable'' warnings.  */
+  (void) yyvalue;
+]b4_location_if([  (void) yylocation;
+])[
+  switch (yytype)
+    {
+]m4_map([b4_symbol_actions], m4_defn([b4_symbol_destructors]))[
+      default:
+        break;
+    }
+}]dnl
+])