From cd5a5a30c026d898a5637bbc1897b71ba7302437 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sun, 25 Sep 2005 22:56:15 +0000
Subject: * lib/optparse.rb (RequiredArgument#parse): not consume unmatched  
 argument.  fixed [ruby-dev:27316]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@9313 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 ChangeLog       |  5 +++++
 lib/optparse.rb | 26 +++++++++++---------------
 2 files changed, 16 insertions(+), 15 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index d71fdc818d..f5060ca48f 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Mon Sep 26 07:55:06 2005  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* lib/optparse.rb (RequiredArgument#parse): not consume unmatched
+	  argument.  fixed [ruby-dev:27316]
+
 Sun Sep 25 12:02:04 2005  Masatoshi SEKI  <m_seki@mva.biglobe.ne.jp>
 
 	* bin/erb: typo fixed.
diff --git a/lib/optparse.rb b/lib/optparse.rb
index 21d07c4665..7135c79b34 100644
--- a/lib/optparse.rb
+++ b/lib/optparse.rb
@@ -454,11 +454,14 @@ class OptionParser
       # Raises an exception if argument is not present.
       #
       def parse(arg, argv, &error)
-        unless arg
-          raise MissingArgument if argv.empty?
-          arg = argv.shift
+        opt = (val = parse_arg(val, &error))[1]
+        val = conv_arg(*val)
+        if opt and !arg
+          argv.shift
+        else
+          val[0] = nil
         end
-        conv_arg(*parse_arg(arg, &error))
+        val
       end
     end
 
@@ -479,24 +482,17 @@ class OptionParser
     end
 
     #
-    # ?
+    # Switch that takes an argument, which does not begin with '-'.
     #
-    class PlacedArgument < self
+    class PlacedArgument < RequiredArgument
       #
-      # ?
+      # Returns nil if argument is not present or begins with '-'.
       #
       def parse(arg, argv, &error)
         if !(val = arg) and (argv.empty? or /\A-/ =~ (val = argv[0]))
           return nil, block, nil
         end
-        opt = (val = parse_arg(val, &error))[1]
-        val = conv_arg(*val)
-        if opt and !arg
-          argv.shift
-        else
-          val[0] = nil
-        end
-        val
+        super
       end
     end
   end
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