mirror of https://github.com/tc39/test262.git
69 lines
2.3 KiB
JavaScript
69 lines
2.3 KiB
JavaScript
// Copyright (C) 2016 the V8 project authors. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-regular-expressions-patterns
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es6id: B.1.4
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description: Quantifiable assertions `?!` ("not followed by")
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info: |
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Term[U] ::
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[~U] QuantifiableAssertion Quantifier
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QuantifiableAssertion::
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( ?= Disjunction )
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( ?! Disjunction )
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The production Term::QuantifiableAssertionQuantifier evaluates the same as
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the production Term::AtomQuantifier but with QuantifiableAssertion
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substituted for Atom.
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The production Assertion::QuantifiableAssertion evaluates by evaluating
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QuantifiableAssertion to obtain a Matcher and returning that Matcher.
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Assertion (21.2.2.6) evaluation rules for the Assertion::(?=Disjunction)
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and Assertion::(?!Disjunction) productions are also used for the
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QuantifiableAssertion productions, but with QuantifiableAssertion
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substituted for Assertion.
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---*/
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var match;
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match = /[a-e](?!Z)*/.exec('aZZZZ bZZZ cZZ dZ e');
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assert.sameValue(match[0], 'a', 'quantifier: *');
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match = /[a-e](?!Z)+/.exec('aZZZZ bZZZ cZZ dZ e');
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assert.sameValue(match[0], 'e', 'quantifier: +');
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match = /[a-e](?!Z)?/.exec('aZZZZ bZZZ cZZ dZ e');
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assert.sameValue(match[0], 'a', 'quantifier: ?');
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match = /[a-e](?!Z){2}/.exec('aZZZZ bZZZ cZZ dZ e');
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assert.sameValue(match[0], 'e', 'quantifier: { DecimalDigits }');
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match = /[a-e](?!Z){2,}/.exec('aZZZZ bZZZ cZZ dZ e');
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assert.sameValue(match[0], 'e', 'quantifier: { DecimalDigits , }');
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match = /[a-e](?!Z){2,3}/.exec('aZZZZ bZZZ cZZ dZ e');
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assert.sameValue(
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match[0], 'e', 'quantifier: { DecimalDigits , DecimalDigits }'
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);
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match = /[a-e](?!Z)*?/.exec('aZZZZ bZZZ cZZ dZ e');
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assert.sameValue(match[0], 'a', 'quantifier: * ?');
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match = /[a-e](?!Z)+?/.exec('aZZZZ bZZZ cZZ dZ e');
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assert.sameValue(match[0], 'e', 'quantifier: + ?');
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match = /[a-e](?!Z)??/.exec('aZZZZ bZZZ cZZ dZ e');
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assert.sameValue(match[0], 'a', 'quantifier: ? ?');
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match = /[a-e](?!Z){2}?/.exec('aZZZZ bZZZ cZZ dZ e');
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assert.sameValue(match[0], 'e', 'quantifier: { DecimalDigits } ?');
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match = /[a-e](?!Z){2,}?/.exec('aZZZZ bZZZ cZZ dZ e');
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assert.sameValue(match[0], 'e', 'quantifier: { DecimalDigits , } ?');
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match = /[a-e](?!Z){2,3}?/.exec('aZZZZ bZZZ cZZ dZ e');
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assert.sameValue(
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match[0], 'e', 'quantifier: { DecimalDigits , DecimalDigits } ?'
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);
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