| // 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. |
|
|
| /**
|
| * @assertion A constant expression is an expression whose value can never
|
| * change, and that can be evaluated entirely at compile time.
|
| * A constant expression is one of the following:
|
| * . . .
|
| * • An expression of the form e1 + e2 where e1 and e2 are constant expressions
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| * that evaluate to a numeric or string value or to null.
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| * • An expression of one of the forms −e, e1 - e2, e1 * e2, e1 / e2, e1 ˜/ e2,
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| * e1 > e2, e1 < e2, e1 >= e2, e1 <= e2 or e1 % e2, where e, e1 and e2 are
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| * constant expressions that evaluate to a numeric value or to null.
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| * @description Checks that an expression of the form e1 <= e2 cannot be used
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| * to initialize a constant variable if e1 is a string.
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| * @compile-error
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| * @author iefremov
|
| */
|
|
|
| const m = "1" <= 1;
|
|
|
| main() {
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| try {
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| print(m);
|
| } catch (x) {}
|
| }
|
