iposva@google.com
f6c5bcec42
better error messages from the VM. Review URL: https://codereview.chromium.org//12297010 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@18614 260f80e4-7a28-3924-810f-c04153c831b5
96 lines
3.5 KiB
Dart
96 lines
3.5 KiB
Dart
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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patch class Error {
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/* patch */ static String _objectToString(Object object) {
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return Object._toString(object);
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}
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}
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patch class NoSuchMethodError {
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// The compiler emits a call to _throwNew when it cannot resolve a static
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// method at compile time. The receiver is actually the literal class of the
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// unresolved method.
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static void _throwNew(Object receiver,
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String memberName,
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List arguments,
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List argumentNames,
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List existingArgumentNames) {
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int numNamedArguments = argumentNames == null ? 0 : argumentNames.length;
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int numPositionalArguments = arguments == null ? 0 : arguments.length;
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numPositionalArguments -= numNamedArguments;
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List positionalArguments;
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if (numPositionalArguments == 0) {
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positionalArguments = [];
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} else {
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positionalArguments = arguments.getRange(0, numPositionalArguments);
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}
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Map<String, dynamic> namedArguments = new Map<String, dynamic>();
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for (int i = 0; i < numNamedArguments; i++) {
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var arg_value = arguments[numPositionalArguments + i];
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namedArguments[argumentNames[i]] = arg_value;
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}
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throw new NoSuchMethodError(receiver,
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memberName,
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positionalArguments,
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namedArguments,
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existingArgumentNames);
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}
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const NoSuchMethodError(Object this._receiver,
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String this._memberName,
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List this._arguments,
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Map<String,dynamic> this._namedArguments,
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[List existingArgumentNames = null])
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: this._existingArgumentNames = existingArgumentNames;
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/* patch */ String toString() {
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StringBuffer actual_buf = new StringBuffer();
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int i = 0;
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if (_arguments != null) {
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for (; i < _arguments.length; i++) {
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if (i > 0) {
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actual_buf.add(", ");
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}
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actual_buf.add(Error.safeToString(_arguments[i]));
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}
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}
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if (_namedArguments != null) {
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_namedArguments.forEach((String key, var value) {
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if (i > 0) {
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actual_buf.add(", ");
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}
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actual_buf.add(key);
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actual_buf.add(": ");
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actual_buf.add(Error.safeToString(value));
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i++;
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});
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}
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StringBuffer msg_buf = new StringBuffer();
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if (_existingArgumentNames == null) {
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msg_buf.add(
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"NoSuchMethodError : method not found: '$_memberName'\n"
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"Receiver: ${Error.safeToString(_receiver)}\n"
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"Arguments: [$actual_buf]");
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} else {
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String actualParameters = actual_buf.toString();
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StringBuffer formal_buf = new StringBuffer();
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for (int i = 0; i < _existingArgumentNames.length; i++) {
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if (i > 0) {
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formal_buf.add(", ");
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}
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formal_buf.add(_existingArgumentNames[i]);
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}
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String formalParameters = formal_buf.toString();
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msg_buf.add(
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"NoSuchMethodError: incorrect number of arguments passed to "
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"method named '$_memberName'\n"
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"Receiver: ${Error.safeToString(_receiver)}\n"
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"Tried calling: $_memberName($actualParameters)\n"
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"Found: $_memberName($formalParameters)");
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}
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return msg_buf.toString();
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}
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}
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