* lib/scanf.rb: fix max width modifier for %f.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@27077 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Sun Mar 28 10:03:51 2010  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* lib/scanf.rb: fix max width modifier for %f.
+
 Sun Mar 28 10:35:45 2010  Ryan Davis  <ryand-ruby@zenspider.com>
 
 	* lib/minitest/*.rb: Imported minitest 1.6.0 r5717.

lib/scanf.rb

@@ -410,11 +410,12 @@ module Scanf
 
           # %f
         when /%\*?[efgEFG]/
-          [ '([-+]?((\d+(?>(?=[^\d.]|$)))|(\d*(\.(\d*([eE][-+]?\d+)?)))))', :extract_float ]
+          [ '([-+]?(?:\d+(?![\d.])|\d*\.\d*(?:[eE][-+]?\d+)?))', :extract_float ]
 
           # %5f
         when /%\*?(\d+)[efgEFG]/
-          [ "(\\S{1,#{$1}})", :extract_float ]
+          [ '(?=[-+]?(?:\d+(?![\d.])|\d*\.\d*(?:[eE][-+]?\d+)?))' +
+            "(\\S{1,#{$1}})", :extract_float ]
 
           # %5s
         when /%\*?(\d+)s/

test/scanf/test_scanf.rb

@@ -269,7 +269,7 @@ module ScanfTests
       [ "%[[:upper:]]", "ABCdefGHI", [ "ABC" ] ],
 
 # Testing 'f'
-      [ "%2f", "x", [0.0] ],  # width-floats match anything (by design)
+      [ "%2f", "x", [] ],
       [ "%F", "1.23e45", [1.23e+45] ],
       [ "%e", "3.25ee", [3.25] ],
       [ "%E", "3..25", [3.0] ],