Remove frog from the repository.

frog/lib/function_implementation.dart

-// Copyright (c) 2011, 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.
-
-/// Exception thrown when a function receives the wrong number of arguments at
-/// runtime. Overridden to provide a more informative error message.
-// TODO(jmesserly): should the base class support a message?
-class _ArgumentMismatchException extends ClosureArgumentMismatchException {
-  final String _message;
-  const _ArgumentMismatchException(this._message);
-  String toString() => "Closure argument mismatch: $_message";
-}
-
-/// Implementation details for [Function]
-/// Note: we don't expose this because it has no useful API. It's just some
-/// helpers for our dynamic calling convention. Maybe in the future there will
-/// be more stuff here, though.
-class _FunctionImplementation implements Function native "Function" {
-  /**
-   * Generates a dynamic call stub for a function.
-   * Our goal is to create a stub method like this on-the-fly:
-   *   function($0, $1, capture) { return this($0, $1, true, capture); }
-   *
-   * This stub then replaces the dynamic one on Function, with one that is
-   * specialized for that particular function, taking into account its default
-   * arguments.
-   */
-  _genStub(argsLength, [names]) native @'''
-    // Fast path #1: if no named arguments and arg count matches.
-    var thisLength = this.$length || this.length;
-    if (thisLength == argsLength && !names) {
-      return this;
-    }
-
-    var paramsNamed = this.$optional ? (this.$optional.length / 2) : 0;
-    var paramsBare = thisLength - paramsNamed;
-    var argsNamed = names ? names.length : 0;
-    var argsBare = argsLength - argsNamed;
-
-    // Check we got the right number of arguments
-    if (argsBare < paramsBare || argsLength > thisLength ||
-        argsNamed > paramsNamed) {
-      return function() {
-        $throw(new _ArgumentMismatchException(
-          'Wrong number of arguments to function. Expected ' + paramsBare +
-          ' positional arguments and at most ' + paramsNamed +
-          ' named arguments, but got ' + argsBare +
-          ' positional arguments and ' + argsNamed + ' named arguments.'));
-      };
-    }
-
-    // First, fill in all of the default values
-    var p = new Array(paramsBare);
-    if (paramsNamed) {
-      p = p.concat(this.$optional.slice(paramsNamed));
-    }
-    // Fill in positional args
-    var a = new Array(argsLength);
-    for (var i = 0; i < argsBare; i++) {
-      p[i] = a[i] = '$' + i;
-    }
-    // Then overwrite with supplied values for optional args
-    var lastParameterIndex;
-    var namesInOrder = true;
-    for (var i = 0; i < argsNamed; i++) {
-      var name = names[i];
-      a[i + argsBare] = name;
-      var j = this.$optional.indexOf(name);
-      if (j < 0 || j >= paramsNamed) {
-        return function() {
-          $throw(new _ArgumentMismatchException(
-            'Named argument "' + name + '" was not expected by function.' +
-            ' Did you forget to mark the function parameter [optional]?'));
-        };
-      } else if (lastParameterIndex && lastParameterIndex > j) {
-        namesInOrder = false;
-      }
-      p[j + paramsBare] = name;
-      lastParameterIndex = j;
-    }
-
-    if (thisLength == argsLength && namesInOrder) {
-      // Fast path #2: named arguments, but they're in order and all supplied.
-      return this;
-    }
-
-    // Note: using Function instead of 'eval' to get a clean scope.
-    // TODO(jmesserly): evaluate the performance of these stubs.
-    var f = 'function(' + a.join(',') + '){return $f(' + p.join(',') + ');}';
-    return new Function('$f', 'return ' + f + '').call(null, this);
-  ''' {
-    throw new _ArgumentMismatchException('');
-  }
-}