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package com.oracle.truffle.js.nodes.access;

import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.instrumentation.Tag;
import com.oracle.truffle.api.object.DynamicObject;
import com.oracle.truffle.api.profiles.ConditionProfile;
import com.oracle.truffle.js.nodes.JavaScriptNode;
import com.oracle.truffle.js.nodes.function.JSFunctionCallNode;
import com.oracle.truffle.js.nodes.unary.IsCallableNode;
import com.oracle.truffle.js.runtime.Errors;
import com.oracle.truffle.js.runtime.JSContext;
import com.oracle.truffle.js.runtime.Symbol;
import com.oracle.truffle.js.runtime.builtins.JSFunction;
import com.oracle.truffle.js.runtime.builtins.JSOrdinary;
import com.oracle.truffle.js.runtime.objects.IteratorRecord;
import com.oracle.truffle.js.runtime.objects.JSDynamicObject;
import com.oracle.truffle.js.runtime.objects.Undefined;

import java.util.Set;

GetIterator(obj, hint = async).
/** * GetIterator(obj, hint = async). */
public abstract class GetAsyncIteratorNode extends GetIteratorNode { @Child private PropertySetNode setState; @Child private GetMethodNode getIteratorMethodNode; @Child private GetMethodNode getAsyncIteratorMethodNode; private final ConditionProfile asyncToSync = ConditionProfile.createBinaryProfile(); protected GetAsyncIteratorNode(JSContext context, JavaScriptNode objectNode) { super(context, objectNode); this.setState = PropertySetNode.createSetHidden(JSFunction.ASYNC_FROM_SYNC_ITERATOR_KEY, context); this.getAsyncIteratorMethodNode = GetMethodNode.create(context, null, Symbol.SYMBOL_ASYNC_ITERATOR); } @Override @Specialization(guards = {"!isForeignObject(iteratedObject)"}) protected IteratorRecord doGetIterator(Object iteratedObject, @Cached("create()") IsCallableNode isCallableNode, @Cached("createCall()") JSFunctionCallNode methodCallNode, @Cached("create()") IsJSObjectNode isObjectNode) { Object method = getAsyncIteratorMethodNode.executeWithTarget(iteratedObject); if (asyncToSync.profile(method == Undefined.instance)) { Object syncMethod = getIteratorMethodNode().executeWithTarget(iteratedObject); IteratorRecord syncIteratorRecord = getIterator(iteratedObject, syncMethod, isCallableNode, methodCallNode, isObjectNode); DynamicObject asyncIterator = createAsyncFromSyncIterator(syncIteratorRecord); return IteratorRecord.create(asyncIterator, getNextMethodNode.getValue(asyncIterator), false); } return getIterator(iteratedObject, method, isCallableNode, methodCallNode, isObjectNode); } @Override protected JavaScriptNode copyUninitialized(Set<Class<? extends Tag>> materializedTags) { return GetAsyncIteratorNodeGen.create(context, cloneUninitialized(objectNode, materializedTags)); } private DynamicObject createAsyncFromSyncIterator(IteratorRecord syncIteratorRecord) { DynamicObject syncIterator = syncIteratorRecord.getIterator(); if (!JSDynamicObject.isJSDynamicObject(syncIterator)) { throw Errors.createTypeErrorNotAnObject(syncIterator, this); } DynamicObject obj = JSOrdinary.create(context, context.getAsyncFromSyncIteratorFactory()); setState.setValue(obj, syncIteratorRecord); return obj; } }