michael@0: /*
michael@0:  * Check that builtin character classes within ranges produce syntax
michael@0:  * errors.
michael@0:  *
michael@0:  * Note that, per the extension in bug 351463, SpiderMonkey permits hyphens
michael@0:  * adjacent to character class escapes in character classes, treating them as a
michael@0:  * hyphen pattern character. Therefore /[\d-\s]/ is okay
michael@0:  *
michael@0:  * Note: /\b/ is the backspace escape, which is a single pattern character,
michael@0:  * though it looks deceptively like a character class.
michael@0:  */
michael@0: 
michael@0: function isRegExpSyntaxError(pattern) {
michael@0:     try {
michael@0:         var re = new RegExp(pattern);
michael@0:     } catch (e) {
michael@0:         if (e instanceof SyntaxError)
michael@0:             return true;
michael@0:     }
michael@0:     return false;
michael@0: }
michael@0: 
michael@0: assertEq(isRegExpSyntaxError('[C-\\s]'), true);
michael@0: assertEq(isRegExpSyntaxError('[C-\\d]'), true);
michael@0: assertEq(isRegExpSyntaxError('[C-\\W]'), true);
michael@0: assertEq(isRegExpSyntaxError('[C-]'), false);
michael@0: assertEq(isRegExpSyntaxError('[-C]'), false);
michael@0: assertEq(isRegExpSyntaxError('[C-C]'), false);
michael@0: assertEq(isRegExpSyntaxError('[C-C]'), false);
michael@0: assertEq(isRegExpSyntaxError('[\\b-\\b]'), false);
michael@0: assertEq(isRegExpSyntaxError('[\\B-\\B]'), false);
michael@0: assertEq(isRegExpSyntaxError('[\\b-\\B]'), false);
michael@0: assertEq(isRegExpSyntaxError('[\\B-\\b]'), true);
michael@0: assertEq(isRegExpSyntaxError('[\\b-\\w]'), true);
michael@0: assertEq(isRegExpSyntaxError('[\\B-\\w]'), true);
michael@0: 
michael@0: /* Extension. */
michael@0: assertEq(isRegExpSyntaxError('[\\s-\\s]'), false);
michael@0: assertEq(isRegExpSyntaxError('[\\W-\\s]'), false);
michael@0: assertEq(isRegExpSyntaxError('[\\s-\\W]'), false);
michael@0: assertEq(isRegExpSyntaxError('[\\W-C]'), false);
michael@0: assertEq(isRegExpSyntaxError('[\\d-C]'), false);
michael@0: assertEq(isRegExpSyntaxError('[\\s-C]'), false);
michael@0: assertEq(isRegExpSyntaxError('[\\w-\\b]'), false);
michael@0: assertEq(isRegExpSyntaxError('[\\w-\\B]'), false);