26 lines
641 B
JavaScript
26 lines
641 B
JavaScript
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// Copyright 2020 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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const access_log = [];
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const handler = {
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get: function(obj, prop) {
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access_log.push(prop);
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return prop in obj ? obj[prop] : "z";
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}
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};
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class ProxiedGroupRegExp extends RegExp {
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exec(s) {
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var result = super.exec(s);
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if (result) {
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result.groups = new Proxy(result.groups, handler);
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}
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return result;
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}
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}
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let re = new ProxiedGroupRegExp("(?<x>.)");
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assertEquals("a z", "a".replace(re, "$<x> $<y>"));
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assertEquals(["x", "y"], access_log);
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