[ruby-dev:22951] StringScanner context

なかだです。

クラス定義の中でstrscanをrequireすると、トップレベルとは別の
StringScannerができてしまいます。

$ ruby -vwe 'class Foo; require "strscan"; end; p StringScanner.constants, Foo::StringScanner.constants'
ruby 1.9.0 (2004-02-17) [i686-linux]
["Id", "Version"]
["Error"]


* ext/strscan/strscan.c (Init_strscan): should not be affected by
  outer bindings.

Index: ext/strscan/strscan.c
===================================================================
RCS file: /cvs/ruby/src/ruby/ext/strscan/strscan.c,v
retrieving revision 1.8
diff -u -2 -p -d -r1.8 strscan.c
--- ext/strscan/strscan.c	17 Feb 2004 09:02:41 -0000	1.8
+++ ext/strscan/strscan.c	18 Feb 2004 07:12:03 -0000
@@ -800,8 +800,12 @@ void
 Init_strscan()
 {
-    volatile VALUE tmp;
+    ID id_scanerr = rb_intern("ScanError");
+    VALUE tmp;
 
     StringScanner = rb_define_class("StringScanner", rb_cObject);
-    ScanError = rb_eval_string("class StringScanner; class Error < StandardError; end; end; ScanError = StringScanner::Error unless defined?(ScanError); StringScanner::Error");
+    ScanError = rb_define_class_under(StringScanner, "Error", rb_eStandardError);
+    if (!rb_const_defined(rb_cObject, id_scanerr)) {
+	rb_const_set(rb_cObject, id_scanerr, ScanError);
+    }
     tmp = rb_str_new2(STRSCAN_VERSION);
     rb_obj_freeze(tmp);


-- 
--- 僕の前にBugはない。
--- 僕の後ろにBugはできる。
    中田 伸悦