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.frame.VirtualFrame;
import com.oracle.truffle.api.instrumentation.Tag;
import com.oracle.truffle.api.object.DynamicObject;
import com.oracle.truffle.js.runtime.Errors;
import com.oracle.truffle.js.runtime.JSContext;
import com.oracle.truffle.js.runtime.JSRealm;
import com.oracle.truffle.js.runtime.objects.Dead;
import com.oracle.truffle.js.runtime.objects.JSAttributes;
import com.oracle.truffle.js.runtime.objects.JSObject;
import com.oracle.truffle.js.runtime.objects.JSObjectUtil;
import com.oracle.truffle.js.runtime.objects.JSProperty;
import com.oracle.truffle.js.runtime.objects.PropertyDescriptor;
import java.util.Set;
public abstract class DeclareGlobalLexicalVariableNode extends DeclareGlobalNode {
private final boolean isConst;
@Child private JSGetOwnPropertyNode getOwnPropertyNode;
protected DeclareGlobalLexicalVariableNode(String varName, boolean isConst) {
super(varName);
this.isConst = isConst;
this.getOwnPropertyNode = JSGetOwnPropertyNode.create(false);
}
public static DeclareGlobalLexicalVariableNode create(String varName, boolean isConst) {
return DeclareGlobalLexicalVariableNodeGen.create(varName, isConst);
}
@Override
public void verify(JSContext context, JSRealm realm) {
super.verify(context, realm);
PropertyDescriptor desc = getOwnPropertyNode.execute(realm.getGlobalObject(), varName);
if (desc != null && !desc.getConfigurable()) {
errorProfile.enter();
throw Errors.createSyntaxErrorVariableAlreadyDeclared(varName, this);
}
}
@Override
public final void executeVoid(VirtualFrame frame, JSContext context, JSRealm realm) {
DynamicObject globalScope = realm.getGlobalScope();
assert !JSObject.hasOwnProperty(globalScope, varName);
assert JSObject.isExtensible(globalScope);
executeVoid(globalScope, context);
}
private int getAttributeFlags() {
return isConst ? (JSAttributes.notConfigurableEnumerableWritable() | JSProperty.CONST) : JSAttributes.notConfigurableEnumerableWritable();
}
protected abstract void executeVoid(DynamicObject globalScope, JSContext context);
@Specialization(guards = {"context.getPropertyCacheLimit() > 0"})
protected void doCached(DynamicObject globalScope, @SuppressWarnings("unused") JSContext context,
@Cached("makeDefineOwnPropertyCache(context)") PropertySetNode cache) {
cache.setValue(globalScope, Dead.instance());
}
@Specialization(replaces = {"doCached"})
protected void doUncached(DynamicObject globalScope, JSContext context) {
JSObjectUtil.putDeclaredDataProperty(context, globalScope, varName, Dead.instance(), getAttributeFlags());
}
protected final PropertySetNode makeDefineOwnPropertyCache(JSContext context) {
return PropertySetNode.createImpl(varName, false, context, true, true, getAttributeFlags(), true);
}
@Override
public boolean isLexicallyDeclared() {
return true;
}
@Override
protected DeclareGlobalNode copyUninitialized(Set<Class<? extends Tag>> materializedTags) {
return create(varName, isConst);
}
}