.kotlin.kotlin-compiler.1.3.11.source-code.DeferredType Maven / Gradle / Ivy
/*
* Copyright 2010-2016 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jetbrains.kotlin.types;
import kotlin.jvm.functions.Function0;
import kotlin.jvm.functions.Function1;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.kotlin.resolve.BindingTrace;
import org.jetbrains.kotlin.storage.NotNullLazyValue;
import org.jetbrains.kotlin.storage.StorageManager;
import org.jetbrains.kotlin.util.Box;
import org.jetbrains.kotlin.util.ReenteringLazyValueComputationException;
import static org.jetbrains.kotlin.resolve.BindingContext.DEFERRED_TYPE;
public class DeferredType extends WrappedType {
private static final Function1 RECURSION_PREVENTER = firstTime -> {
if (firstTime) throw new ReenteringLazyValueComputationException();
return ErrorUtils.createErrorType("Recursive dependency");
};
@NotNull
/*package private*/ static DeferredType create(
@NotNull StorageManager storageManager,
@NotNull BindingTrace trace,
@NotNull Function0 compute
) {
DeferredType deferredType = new DeferredType(storageManager.createLazyValue(compute));
trace.record(DEFERRED_TYPE, new Box<>(deferredType));
return deferredType;
}
@NotNull
/*package private*/ static DeferredType createRecursionIntolerant(
@NotNull StorageManager storageManager,
@NotNull BindingTrace trace,
@NotNull Function0 compute
) {
//noinspection unchecked
DeferredType deferredType =
new DeferredType(storageManager.createLazyValueWithPostCompute(compute, RECURSION_PREVENTER, t -> null));
trace.record(DEFERRED_TYPE, new Box<>(deferredType));
return deferredType;
}
private final NotNullLazyValue lazyValue;
private DeferredType(@NotNull NotNullLazyValue lazyValue) {
this.lazyValue = lazyValue;
}
public boolean isComputing() {
return lazyValue.isComputing();
}
@Override
public boolean isComputed() {
return lazyValue.isComputed();
}
@NotNull
@Override
public KotlinType getDelegate() {
return lazyValue.invoke();
}
@NotNull
@Override
public String toString() {
try {
if (lazyValue.isComputed()) {
return getDelegate().toString();
}
else {
return "";
}
}
catch (ReenteringLazyValueComputationException e) {
return "";
}
}
}