C++ (Cpp) AbstractFramePtr::environmentChain Examples

Example #1

File: GeneratorObject.cpp Project: subsevenx2001/gecko-dev

bool
GeneratorObject::suspend(JSContext* cx, HandleObject obj, AbstractFramePtr frame, jsbytecode* pc,
                         Value* vp, unsigned nvalues)
{
    MOZ_ASSERT(*pc == JSOP_INITIALYIELD || *pc == JSOP_YIELD);

    Rooted<GeneratorObject*> genObj(cx, &obj->as<GeneratorObject>());
    MOZ_ASSERT(!genObj->hasExpressionStack());

    if (*pc == JSOP_YIELD && genObj->isClosing() && genObj->is<LegacyGeneratorObject>()) {
        RootedValue val(cx, ObjectValue(*frame.callee()));
        ReportValueError(cx, JSMSG_BAD_GENERATOR_YIELD, JSDVG_IGNORE_STACK, val, nullptr);
        return false;
    }

    uint32_t yieldIndex = GET_UINT24(pc);
    genObj->setYieldIndex(yieldIndex);
    genObj->setEnvironmentChain(*frame.environmentChain());

    if (nvalues) {
        ArrayObject* stack = NewDenseCopiedArray(cx, nvalues, vp);
        if (!stack)
            return false;
        genObj->setExpressionStack(*stack);
    }

    return true;
}