optparse.rb: get rid of eval

* lib/optparse.rb: try Float() and Integer() instead of eval,
  which does too much things.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59312 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/optparse.rb

@@ -1842,7 +1842,7 @@ XXX
   #
   # Float number format, and converts to Float.
   #
-  float = "(?:#{decimal}(?:\\.(?:#{decimal})?)?|\\.#{decimal})(?:E[-+]?#{decimal})?"
+  float = "(?:#{decimal}(?=(.)?)(?:\\.(?:#{decimal})?)?|\\.#{decimal})(?:E[-+]?#{decimal})?"
   floatpat = %r"\A[-+]?#{float}\z"io
   accept(Float, floatpat) {|s,| s.to_f if s}
 
@@ -1851,11 +1851,13 @@ XXX
   # for float format, and Rational for rational format.
   #
   real = "[-+]?(?:#{octal}|#{float})"
-  accept(Numeric, /\A(#{real})(?:\/(#{real}))?\z/io) {|s, d, n|
+  accept(Numeric, /\A(#{real})(?:\/(#{real}))?\z/io) {|s, d, f, n,|
     if n
       Rational(d, n)
-    elsif s
+    elsif f
-      eval(s)
+      Float(s)
+    else
+      Integer(s)
     end
   }
 
@@ -1889,10 +1891,14 @@ XXX
   # integer format, Float for float format.
   #
   DecimalNumeric = floatpat     # decimal integer is allowed as float also.
-  accept(DecimalNumeric, floatpat) {|s,|
+  accept(DecimalNumeric, floatpat) {|s, f|
     begin
-      eval(s)
+      if f
-    rescue SyntaxError
+        Float(s)
+      else
+        Integer(s)
+      end
+    rescue ArgumentError
       raise OptionParser::InvalidArgument, s
     end if s
   }

test/optparse/test_acceptable.rb

@@ -85,6 +85,9 @@ class TestOptionParser::Acceptable < TestOptionParser
     assert_equal(%w"", no_error {@opt.parse!(%w"--numeric 1/2")})
     assert_equal(Rational(1, 2), @numeric)
 
+    assert_equal(%w"", no_error {@opt.parse!(%w"--numeric 010")})
+    assert_equal(8, @numeric)
+
     assert_equal(%w"", no_error {@opt.parse!(%w"--numeric 1.2/2.3")})
     assert_equal(Rational(12, 23), @numeric)