* parse.y (shadowing_lvar_gen): no duplicate error for "_".

git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@14186 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

3 files changed, 25 insertions, 17 deletions

diff --git a/ChangeLog b/ChangeLog
index 96bea66fa..e265aa7fe 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Tue Dec 11 01:21:21 2007  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* parse.y (shadowing_lvar_gen): no duplicate error for "_".
+
 Mon Dec 10 22:08:47 2007  Akinori MUSHA  <knu@iDaemons.org>
 
 	* array.c (rb_ary_slice_bang): If an invalid range is given, do
diff --git a/parse.y b/parse.y
index 1d2669c45..2f3a118d1 100644
--- a/parse.y
+++ b/parse.y
@@ -7626,20 +7626,24 @@ assignable_gen(struct parser_params *parser, ID id, NODE *val)
 static void
 shadowing_lvar_gen(struct parser_params *parser, ID name)
 {
-     if (dyna_in_block()) {
-	 if (dvar_curr(name)) {
-	     yyerror("duplicated argument name");
-	 }
-	 else if (dvar_defined(name) || local_id(name)) {
-	     rb_warningS("shadowing outer local variable - %s", rb_id2name(name));
-	     vtable_add(lvtbl->vars, name);
-	 }
-     }
-     else {
-	 if (local_id(name)) {
-	     yyerror("duplicated argument name");
-	 }
-     }
+    static ID uscore;
+
+    if (!uscore) uscore = rb_intern("_");
+    if (uscore == name) return;
+    if (dyna_in_block()) {
+	if (dvar_curr(name)) {
+	    yyerror("duplicated argument name");
+	}
+	else if (dvar_defined(name) || local_id(name)) {
+	    rb_warningS("shadowing outer local variable - %s", rb_id2name(name));
+	    vtable_add(lvtbl->vars, name);
+	}
+    }
+    else {
+	if (local_id(name)) {
+	    yyerror("duplicated argument name");
+	}
+    }
 }
 
 static void
diff --git a/version.h b/version.h
index 2624e6f27..d1de4cbee 100644
--- a/version.h
+++ b/version.h
@@ -1,7 +1,7 @@
 #define RUBY_VERSION "1.9.0"
-#define RUBY_RELEASE_DATE "2007-12-10"
+#define RUBY_RELEASE_DATE "2007-12-11"
 #define RUBY_VERSION_CODE 190
-#define RUBY_RELEASE_CODE 20071210
+#define RUBY_RELEASE_CODE 20071211
 #define RUBY_PATCHLEVEL 0
 
 #define RUBY_VERSION_MAJOR 1
@@ -9,7 +9,7 @@
 #define RUBY_VERSION_TEENY 0
 #define RUBY_RELEASE_YEAR 2007
 #define RUBY_RELEASE_MONTH 12
-#define RUBY_RELEASE_DAY 10
+#define RUBY_RELEASE_DAY 11
 
 #ifdef RUBY_EXTERN
 RUBY_EXTERN const char ruby_version[];