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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
function GeneratorNext(val) {
// The IsSuspendedGenerator call below is not necessary for correctness.
// It's a performance optimization to check for the common case with a
// single call. It's also inlined in Baseline.
if (!IsSuspendedGenerator(this)) {
if (!IsObject(this) || !IsGeneratorObject(this))
return callFunction(CallGeneratorMethodIfWrapped, this, val, "GeneratorNext");
if (GeneratorObjectIsClosed(this))
return { value: undefined, done: true };
if (GeneratorIsRunning(this))
ThrowTypeError(JSMSG_NESTING_GENERATOR);
}
try {
return resumeGenerator(this, val, "next");
} catch (e) {
if (!GeneratorObjectIsClosed(this))
GeneratorSetClosed(this);
throw e;
}
}
function GeneratorThrow(val) {
if (!IsSuspendedGenerator(this)) {
if (!IsObject(this) || !IsGeneratorObject(this))
return callFunction(CallGeneratorMethodIfWrapped, this, val, "GeneratorThrow");
if (GeneratorObjectIsClosed(this))
throw val;
if (GeneratorIsRunning(this))
ThrowTypeError(JSMSG_NESTING_GENERATOR);
}
try {
return resumeGenerator(this, val, "throw");
} catch (e) {
if (!GeneratorObjectIsClosed(this))
GeneratorSetClosed(this);
throw e;
}
}
function GeneratorReturn(val) {
if (!IsSuspendedGenerator(this)) {
if (!IsObject(this) || !IsGeneratorObject(this))
return callFunction(CallGeneratorMethodIfWrapped, this, val, "GeneratorReturn");
if (GeneratorObjectIsClosed(this))
return { value: val, done: true };
if (GeneratorIsRunning(this))
ThrowTypeError(JSMSG_NESTING_GENERATOR);
}
try {
var rval = { value: val, done: true };
return resumeGenerator(this, rval, "return");
} catch (e) {
if (!GeneratorObjectIsClosed(this))
GeneratorSetClosed(this);
throw e;
}
}
function InterpretGeneratorResume(gen, val, kind) {
// If we want to resume a generator in the interpreter, the script containing
// the resumeGenerator/JSOp::Resume also has to run in the interpreter. The
// forceInterpreter() call below compiles to a bytecode op that prevents us
// from JITing this script.
forceInterpreter();
if (kind === "next")
return resumeGenerator(gen, val, "next");
if (kind === "throw")
return resumeGenerator(gen, val, "throw");
assert(kind === "return", "Invalid resume kind");
return resumeGenerator(gen, val, "return");
}
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