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/*
* Copyright (C) 2015 Yusuke Suzuki <utatane.tea@gmail.com>.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// 25.3.3.3 GeneratorResume ( generator, value )
// 25.3.3.4 GeneratorResumeAbrupt(generator, abruptCompletion)
function generatorResume(generator, sentValue, resumeMode)
{
"use strict";
// GeneratorState.
const Completed = -1;
const Executing = -2;
// ResumeMode.
const NormalMode = 0;
const ReturnMode = 1;
const ThrowMode = 2;
let state = generator.@generatorState;
let done = false;
let value = @undefined;
if (typeof state !== 'number')
throw new @TypeError("|this| should be a generator");
if (state === Executing)
throw new @TypeError("Generator is executing");
if (state === Completed) {
if (resumeMode === ThrowMode)
throw sentValue;
done = true;
if (resumeMode === ReturnMode)
value = sentValue;
} else {
try {
generator.@generatorState = Executing;
value = generator.@generatorNext.@call(generator.@generatorThis, generator, state, sentValue, resumeMode);
if (generator.@generatorState === Executing) {
generator.@generatorState = Completed;
done = true;
}
} catch (error) {
generator.@generatorState = Completed;
throw error;
}
}
return { done, value };
}
function next(value)
{
"use strict";
return @generatorResume(this, value, /* NormalMode */ 0);
}
function return(value)
{
"use strict";
return @generatorResume(this, value, /* ReturnMode */ 1);
}
function throw(exception)
{
"use strict";
return @generatorResume(this, exception, /* ThrowMode */ 2);
}