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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2013, 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 import 'dart:_foreign_helper' show JS; | 5 import 'dart:_js_helper' show Primitives; |
6 | 6 |
7 patch class Symbol implements core.Symbol { | 7 patch class Symbol implements core.Symbol { |
8 patch const Symbol(String name) | 8 patch const Symbol(String name) |
9 : this._name = name; | 9 : this._name = name; |
10 } | 10 } |
11 | 11 |
12 /** | |
13 * This is the low-level method that is used to implement | |
14 * [print]. It is possible to override this function from JavaScript | |
15 * by defining a function in JavaScript called "dartPrint". | |
16 */ | |
17 patch void printToConsole(String line) { | 12 patch void printToConsole(String line) { |
18 if (JS('bool', r'typeof dartPrint == "function"')) { | 13 Primitives.printString('$line'); |
19 // Support overriding print from JavaScript. | |
20 JS('void', r'dartPrint(#)', line); | |
21 return; | |
22 } | |
23 | |
24 // Inside browser or nodejs. | |
25 if (JS('bool', r'typeof console == "object"') && | |
26 JS('bool', r'typeof console.log == "function"')) { | |
27 JS('void', r'console.log(#)', line); | |
28 return; | |
29 } | |
30 | |
31 // Don't throw inside IE, the console is only defined if dev tools is open. | |
32 if (JS('bool', r'typeof window == "object"')) { | |
33 return; | |
34 } | |
35 | |
36 // Running in d8, the V8 developer shell, or in Firefox' js-shell. | |
37 if (JS('bool', r'typeof print == "function"')) { | |
38 JS('void', r'print(#)', line); | |
39 return; | |
40 } | |
41 | |
42 // This is somewhat nasty, but we don't want to drag in a bunch of | |
43 // dependencies to handle a situation that cannot happen. So we | |
44 // avoid using Dart [:throw:] and Dart [toString]. | |
45 JS('void', 'throw "Unable to print message: " + String(#)', line); | |
46 } | 14 } |
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