Rewrite double.parse.

runtime/lib/string_patch.dart

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 patch class String {
   /* patch */ factory String.fromCharCodes(Iterable<int> charCodes) {
     return _StringBase.createFromCharCodes(charCodes);
   }
 }
 
@@ skipping 498 matching lines @@
   }
 
   int get hashCode native "String_getHashCode";
 
   // Checks for one-byte whitespaces only.
   // TODO(srdjan): Investigate if 0x85 (NEL) and 0xA0 (NBSP) are valid
   // whitespaces for one byte strings.
   bool _isWhitespace(int codePoint) {
     return
       (codePoint == 32) || // Space.
-      ((9 <= codePoint) && (codePoint <= 13)); // CR, LF, TAB, etc.
+      ((9 <= codePoint) && (codePoint <= 13)) ||  // CR, LF, TAB, etc.
+      (codePoint == 0xA0);  // NBSP.
   }
 
   String _substringUncheckedNative(int startIndex, int endIndex)
       native "OneByteString_substringUnchecked";
 
   List<String> _splitWithCharCode(int charCode)
       native "OneByteString_splitWithCharCode";
 
   List<String> split(Pattern pattern) {
     if ((pattern._cid == _OneByteString._classId) && (pattern.length == 1)) {
@@ skipping 37 matching lines @@
     throw new UnsupportedError(
         "_TwoByteString can only be allocated by the VM");
   }
 
   // Checks for one-byte whitespaces only.
   // TODO(srdjan): Investigate if 0x85 (NEL) and 0xA0 (NBSP) are valid
   // whitespaces. Add checking for multi-byte whitespace codepoints.
   bool _isWhitespace(int codePoint) {
     return
       (codePoint == 32) || // Space.
-      ((9 <= codePoint) && (codePoint <= 13)); // CR, LF, TAB, etc.
+      ((9 <= codePoint) && (codePoint <= 13)) || // CR, LF, TAB, etc.
+      (codePoint == 0xA0);  // NBSP.
   }
 }
 
 
 class _FourByteString extends _StringBase implements String {
   factory _FourByteString._uninstantiable() {
     throw new UnsupportedError(
         "_FourByteString can only be allocated by the VM");
   }
 
@@ skipping 77 matching lines @@
 class _CodeUnits extends Object with ListMixin<int>,
                                      UnmodifiableListMixin<int> {
   /** The string that this is the code units of. */
   String _string;
 
   _CodeUnits(this._string);
 
   int get length => _string.length;
   int operator[](int i) => _string.codeUnitAt(i);
 }