зеркало из https://github.com/mozilla/pjs.git
84 строки
2.6 KiB
C++
84 строки
2.6 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express oqr
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is the JavaScript 2 Prototype.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the
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* terms of the GNU Public License (the "GPL"), in which case the
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* provisions of the GPL are applicable instead of those above.
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* If you wish to allow use of your version of this file only
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* under the terms of the GPL and not to allow others to use your
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* version of this file under the NPL, indicate your decision by
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* deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL. If you do not delete
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* the provisions above, a recipient may use your version of this
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* file under either the NPL or the GPL.
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*/
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#include "jstypes.h"
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#include "numerics.h"
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namespace JavaScript {
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namespace JSTypes {
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// the canonical undefined value.
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const JSValue kUndefinedValue;
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int JSValue::operator==(const JSValue& value) const
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{
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if (this->tag == value.tag) {
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#define CASE(T) case T##_tag: return (this->T == value.T)
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switch (tag) {
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CASE(i8); CASE(u8);
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CASE(i16); CASE(u16);
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CASE(i32); CASE(u32); CASE(f32);
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CASE(i64); CASE(u64); CASE(f64);
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CASE(object); CASE(array); CASE(function);
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#undef CASE
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// question: are all undefined values equal to one another?
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case undefined_tag: return 1;
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}
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}
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return 0;
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}
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Formatter& operator<<(Formatter& f, const JSValue& value)
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{
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switch (value.tag) {
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case JSValue::i32_tag:
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f << float64(value.i32);
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break;
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case JSValue::f64_tag:
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f << value.f64;
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break;
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case JSValue::object_tag:
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case JSValue::array_tag:
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case JSValue::function_tag:
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printFormat(stdOut, "0x%08X", value.object);
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break;
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default:
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f << "undefined";
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break;
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}
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return f;
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}
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} /* namespace JSTypes */
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} /* namespace JavaScript */
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