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1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 part of dart.core; | 5 part of dart.core; |
6 | 6 |
7 /** | 7 /** |
8 * Error objects thrown in the case of a program failure. | 8 * Error objects thrown in the case of a program failure. |
9 * | 9 * |
10 * An `Error` object represents a program failure that the programmer | 10 * An `Error` object represents a program failure that the programmer |
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113 } | 113 } |
114 | 114 |
115 /** | 115 /** |
116 * Error thrown when attempting to throw [:null:]. | 116 * Error thrown when attempting to throw [:null:]. |
117 */ | 117 */ |
118 class NullThrownError extends Error { | 118 class NullThrownError extends Error { |
119 String toString() => "Throw of null."; | 119 String toString() => "Throw of null."; |
120 } | 120 } |
121 | 121 |
122 /** | 122 /** |
123 * Error thrown when attempting to dereference [:null:]. | |
124 */ | |
125 class NullDereferenceError extends Error implements NoSuchMethodError { | |
126 /** Message describing the problem. */ | |
127 final message; | |
128 | |
129 /** | |
130 * The [message] optionally describes the circumstances | |
131 * under which [:null:] was dereferenced. | |
132 */ | |
133 NullDereferenceError([this.message]); | |
134 | |
135 String toString() { | |
136 return "Cannot dereference null.${ message != null ? ' $message' : ''}"; | |
137 } | |
138 } | |
139 | |
140 /** | |
141 * Error thrown when a function is passed an unacceptable argument. | 123 * Error thrown when a function is passed an unacceptable argument. |
142 */ | 124 */ |
143 class ArgumentError extends Error { | 125 class ArgumentError extends Error { |
144 /** Whether value was provided. */ | 126 /** Whether value was provided. */ |
145 final bool _hasValue; | 127 final bool _hasValue; |
146 /** The invalid value. */ | 128 /** The invalid value. */ |
147 final invalidValue; | 129 final invalidValue; |
148 /** Name of the invalid argument, if available. */ | 130 /** Name of the invalid argument, if available. */ |
149 final String name; | 131 final String name; |
150 /** Message describing the problem. */ | 132 /** Message describing the problem. */ |
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582 * the first time it is read. If evaluating the initializer expression causes | 564 * the first time it is read. If evaluating the initializer expression causes |
583 * another read of the variable, this error is thrown. | 565 * another read of the variable, this error is thrown. |
584 */ | 566 */ |
585 class CyclicInitializationError extends Error { | 567 class CyclicInitializationError extends Error { |
586 final String variableName; | 568 final String variableName; |
587 CyclicInitializationError([this.variableName]); | 569 CyclicInitializationError([this.variableName]); |
588 String toString() => variableName == null | 570 String toString() => variableName == null |
589 ? "Reading static variable during its initialization" | 571 ? "Reading static variable during its initialization" |
590 : "Reading static variable '$variableName' during its initialization"; | 572 : "Reading static variable '$variableName' during its initialization"; |
591 } | 573 } |
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