Patch methods in classes.

corelib/unified/math/base.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.
 
 // A part of the dart:math library.
 
 /**
  * Base of the natural logarithms.
  */
 final double E = 2.718281828459045;
@@ skipping 31 matching lines @@
 /**
  * Square root of 2.
  */
 final double SQRT2 = 1.4142135623730951;
 
 /**
  * Parses a [String] representation of an [int], and returns
  * an [int]. Throws a [BadNumberFormatException] if [str]
  * cannot be parsed as an [int].
  */
-int parseInt(String str) => MathNatives.parseInt(str);
+external int parseInt(String str);
 
 /**
  * Parses a [String] representation of a [double], and returns
  * a [double]. Throws a [BadNumberFormatException] if [str] cannot
  * be parsed as a [double].
  */
-double parseDouble(String str) => MathNatives.parseDouble(str);
+external double parseDouble(String str);
 
 num min(num a, num b) {
   int c = a.compareTo(b);
   if (c == 0) return a;
   if (c < 0) {
     if ((b is double) && b.isNaN()) return b;
     return a;
   }
   if ((a is double) && a.isNaN()) return a;
   return b;
 }
 
 num max(num a, num b) {
   // NaNs are handled correctly since the compareTo function always considers
   // them to be bigger than any other operand.
   return (a.compareTo(b) < 0) ? b : a;
 }
 
 /**
  * Returns the arc tangent of [a]/[b] with sign according to quadrant.
  */
-double atan2(num a, num b) => MathNatives.atan2(a, b);
+external double atan2(num a, num b);
 
 /**
  * If the [exponent] is an integer the result is of the same type as [x].
  * Otherwise it is a [double].
  */
-num pow(num x, num exponent) => MathNatives.pow(x, exponent);
+external num pow(num x, num exponent);
 
-double sin(num x) => MathNatives.sin(x);
-double cos(num x) => MathNatives.cos(x);
-double tan(num x) => MathNatives.tan(x);
-double acos(num x) => MathNatives.acos(x);
-double asin(num x) => MathNatives.asin(x);
-double atan(num x) => MathNatives.atan(x);
-double sqrt(num x) => MathNatives.sqrt(x);
-double exp(num x) => MathNatives.exp(x);
-double log(num x) => MathNatives.log(x);
+external double sin(num x);
+external double cos(num x);
+external double tan(num x);
+external double acos(num x);
+external double asin(num x);
+external double atan(num x);
+external double sqrt(num x);
+external double exp(num x);
+external double log(num x);