private boolean canImportMembersFrom(
@NotNull Collection<? extends DeclarationDescriptor> descriptors,
@NotNull JetSimpleNameExpression reference,
@NotNull BindingTrace trace,
@NotNull LookupMode lookupMode) {
if (lookupMode == LookupMode.ONLY_CLASSES) {
return true;
}
if (descriptors.size() == 1) {
return canImportMembersFrom(descriptors.iterator().next(), reference, trace, lookupMode);
}
TemporaryBindingTrace temporaryTrace =
TemporaryBindingTrace.create(
trace, "trace to find out if members can be imported from", reference);
boolean canImport = false;
for (DeclarationDescriptor descriptor : descriptors) {
canImport |= canImportMembersFrom(descriptor, reference, temporaryTrace, lookupMode);
}
if (!canImport) {
temporaryTrace.commit();
}
return canImport;
}
@Override
public JetTypeInfo visitObjectLiteralExpression(
@NotNull final JetObjectLiteralExpression expression, final ExpressionTypingContext context) {
DelegatingBindingTrace delegatingBindingTrace =
context.trace.get(TRACE_DELTAS_CACHE, expression.getObjectDeclaration());
if (delegatingBindingTrace != null) {
delegatingBindingTrace.addAllMyDataTo(context.trace);
JetType type = context.trace.get(EXPRESSION_TYPE, expression);
return DataFlowUtils.checkType(type, expression, context, context.dataFlowInfo);
}
final JetType[] result = new JetType[1];
final TemporaryBindingTrace temporaryTrace =
TemporaryBindingTrace.create(
context.trace, "trace to resolve object literal expression", expression);
ObservableBindingTrace.RecordHandler<PsiElement, ClassDescriptor> handler =
new ObservableBindingTrace.RecordHandler<PsiElement, ClassDescriptor>() {
@Override
public void handleRecord(
WritableSlice<PsiElement, ClassDescriptor> slice,
PsiElement declaration,
final ClassDescriptor descriptor) {
if (slice == CLASS && declaration == expression.getObjectDeclaration()) {
JetType defaultType =
DeferredType.create(
context.trace,
createRecursionIntolerantLazyValueWithDefault(
ErrorUtils.createErrorType("Recursive dependency"),
new Function0<JetType>() {
@Override
public JetType invoke() {
return descriptor.getDefaultType();
}
}));
result[0] = defaultType;
if (!context.trace.get(PROCESSED, expression)) {
temporaryTrace.record(EXPRESSION_TYPE, expression, defaultType);
temporaryTrace.record(PROCESSED, expression);
}
}
}
};
ObservableBindingTrace traceAdapter = new ObservableBindingTrace(temporaryTrace);
traceAdapter.addHandler(CLASS, handler);
TopDownAnalyzer.processClassOrObject(
context.replaceBindingTrace(traceAdapter).replaceContextDependency(INDEPENDENT),
context.scope.getContainingDeclaration(),
expression.getObjectDeclaration());
DelegatingBindingTrace cloneDelta =
new DelegatingBindingTrace(
new BindingTraceContext().getBindingContext(),
"cached delta trace for object literal expression resolve",
expression);
temporaryTrace.addAllMyDataTo(cloneDelta);
context.trace.record(TRACE_DELTAS_CACHE, expression.getObjectDeclaration(), cloneDelta);
temporaryTrace.commit();
return DataFlowUtils.checkType(result[0], expression, context, context.dataFlowInfo);
}
private <D extends CallableDescriptor, F extends D>
OverloadResolutionResultsImpl<F> doResolveCallOrGetCachedResults(
@NotNull ResolutionResultsCache.MemberType<F> memberType,
@NotNull BasicCallResolutionContext context,
@NotNull List<ResolutionTask<D, F>> prioritizedTasks,
@NotNull CallTransformer<D, F> callTransformer,
@NotNull JetReferenceExpression reference) {
OverloadResolutionResultsImpl<F> results = null;
TracingStrategy tracing =
prioritizedTasks.isEmpty()
? TracingStrategy.EMPTY
: prioritizedTasks.iterator().next().tracing;
TemporaryBindingTrace traceToResolveCall =
TemporaryBindingTrace.create(context.trace, "trace to resolve call", context.call);
CallKey callKey = CallResolverUtil.createCallKey(context);
if (callKey != null) {
OverloadResolutionResultsImpl<F> cachedResults =
context.resolutionResultsCache.getResolutionResults(callKey, memberType);
if (cachedResults != null) {
DelegatingBindingTrace deltasTraceForResolve =
context.resolutionResultsCache.getResolutionTrace(callKey);
assert deltasTraceForResolve != null;
deltasTraceForResolve.addAllMyDataTo(traceToResolveCall);
results = cachedResults;
}
}
if (results == null) {
BasicCallResolutionContext newContext = context.replaceBindingTrace(traceToResolveCall);
results = doResolveCall(newContext, prioritizedTasks, callTransformer, reference);
DelegatingBindingTrace deltasTraceForTypeInference =
((OverloadResolutionResultsImpl) results).getTrace();
if (deltasTraceForTypeInference != null) {
deltasTraceForTypeInference.addAllMyDataTo(traceToResolveCall);
}
completeTypeInferenceDependentOnFunctionLiterals(newContext, results, tracing);
cacheResults(memberType, context, results, traceToResolveCall, tracing);
}
traceToResolveCall.commit();
if (!prioritizedTasks.isEmpty() && context.contextDependency == ContextDependency.INDEPENDENT) {
results = completeTypeInferenceDependentOnExpectedType(context, results, tracing);
}
if (extension != null) {
extension.run(results, context);
}
return results;
}
@NotNull
private <D extends CallableDescriptor, F extends D>
OverloadResolutionResultsImpl<F> performResolutionGuardedForExtraFunctionLiteralArguments(
@NotNull ResolutionTask<D, F> task, @NotNull CallTransformer<D, F> callTransformer) {
OverloadResolutionResultsImpl<F> results = performResolution(task, callTransformer);
// If resolution fails, we should check for some of the following situations:
// class A {
// val foo = Bar() // The following is intended to be an anonymous initializer,
// // but is treated as a function literal argument
// {
// ...
// }
// }
//
// fun foo() {
// bar {
// buzz()
// {...} // intended to be a returned from the outer literal
// }
// }
ImmutableSet<OverloadResolutionResults.Code> someFailed =
ImmutableSet.of(MANY_FAILED_CANDIDATES, SINGLE_CANDIDATE_ARGUMENT_MISMATCH);
if (someFailed.contains(results.getResultCode())
&& !task.call.getFunctionLiteralArguments().isEmpty()
&& task.contextDependency
== ContextDependency.INDEPENDENT) { // For nested calls there are no such cases
// We have some candidates that failed for some reason
// And we have a suspect: the function literal argument
// Now, we try to remove this argument and see if it helps
DelegatingCall callWithoutFLArgs =
new DelegatingCall(task.call) {
@NotNull
@Override
public List<JetExpression> getFunctionLiteralArguments() {
return Collections.emptyList();
}
};
TemporaryBindingTrace temporaryTrace =
TemporaryBindingTrace.create(
task.trace, "trace for resolution guarded for extra function literal arguments");
ResolutionTask<D, F> newTask =
task.replaceBindingTrace(temporaryTrace).replaceCall(callWithoutFLArgs);
OverloadResolutionResultsImpl<F> resultsWithFunctionLiteralsStripped =
performResolution(newTask, callTransformer);
if (resultsWithFunctionLiteralsStripped.isSuccess()
|| resultsWithFunctionLiteralsStripped.isAmbiguity()) {
task.tracing.danglingFunctionLiteralArgumentSuspected(
task.trace, task.call.getFunctionLiteralArguments());
}
}
return results;
}
@NotNull
private <D extends CallableDescriptor, F extends D>
OverloadResolutionResultsImpl<F> performResolution(
@NotNull ResolutionTask<D, F> task, @NotNull CallTransformer<D, F> callTransformer) {
for (ResolutionCandidate<D> resolutionCandidate : task.getCandidates()) {
TemporaryBindingTrace candidateTrace =
TemporaryBindingTrace.create(task.trace, "trace to resolve candidate");
Collection<CallCandidateResolutionContext<D>> contexts =
callTransformer.createCallContexts(resolutionCandidate, task, candidateTrace);
for (CallCandidateResolutionContext<D> context : contexts) {
candidateResolver.performResolutionForCandidateCall(context, task);
/* important for 'variable as function case': temporary bind reference to descriptor (will be rewritten)
to have a binding to variable while 'invoke' call resolve */
task.tracing.bindReference(context.candidateCall.getTrace(), context.candidateCall);
Collection<ResolvedCallWithTrace<F>> calls =
callTransformer.transformCall(context, this, task);
for (ResolvedCallWithTrace<F> call : calls) {
task.tracing.bindReference(call.getTrace(), call);
task.tracing.bindResolvedCall(call.getTrace(), call);
task.getResolvedCalls().add(call);
}
}
}
OverloadResolutionResultsImpl<F> results =
ResolutionResultsHandler.INSTANCE.computeResultAndReportErrors(
task.trace, task.tracing, task.getResolvedCalls());
if (!results.isSingleResult() && !results.isIncomplete()) {
argumentTypeResolver.checkTypesWithNoCallee(task.toBasic());
}
return results;
}
@NotNull
private <D extends CallableDescriptor, F extends D>
OverloadResolutionResultsImpl<F> doResolveCall(
@NotNull BasicCallResolutionContext context,
@NotNull List<ResolutionTask<D, F>> prioritizedTasks, // high to low priority
@NotNull CallTransformer<D, F> callTransformer,
@NotNull JetReferenceExpression reference) {
ResolutionDebugInfo.Data debugInfo = ResolutionDebugInfo.create();
context.trace.record(
ResolutionDebugInfo.RESOLUTION_DEBUG_INFO, context.call.getCallElement(), debugInfo);
context.trace.record(RESOLUTION_SCOPE, context.call.getCalleeExpression(), context.scope);
if (context.dataFlowInfo.hasTypeInfoConstraints()) {
context.trace.record(
NON_DEFAULT_EXPRESSION_DATA_FLOW,
context.call.getCalleeExpression(),
context.dataFlowInfo);
}
debugInfo.set(ResolutionDebugInfo.TASKS, prioritizedTasks);
if (context.checkArguments == CheckValueArgumentsMode.ENABLED) {
argumentTypeResolver.analyzeArgumentsAndRecordTypes(context);
}
TemporaryBindingTrace traceForFirstNonemptyCandidateSet = null;
OverloadResolutionResultsImpl<F> resultsForFirstNonemptyCandidateSet = null;
for (ResolutionTask<D, F> task : prioritizedTasks) {
TemporaryBindingTrace taskTrace =
TemporaryBindingTrace.create(
context.trace, "trace to resolve a task for", task.reference);
OverloadResolutionResultsImpl<F> results =
performResolutionGuardedForExtraFunctionLiteralArguments(
task.replaceBindingTrace(taskTrace), callTransformer);
if (results.isSuccess() || results.isAmbiguity()) {
taskTrace.commit();
if (results.isSuccess()) {
debugInfo.set(ResolutionDebugInfo.RESULT, results.getResultingCall());
}
resolveFunctionArguments(context, results);
return results;
}
if (results.getResultCode() == INCOMPLETE_TYPE_INFERENCE) {
results.setTrace(taskTrace);
return results;
}
boolean updateResults =
traceForFirstNonemptyCandidateSet == null
|| (resultsForFirstNonemptyCandidateSet.getResultCode()
== CANDIDATES_WITH_WRONG_RECEIVER
&& results.getResultCode() != CANDIDATES_WITH_WRONG_RECEIVER);
if (!task.getCandidates().isEmpty() && !results.isNothing() && updateResults) {
traceForFirstNonemptyCandidateSet = taskTrace;
resultsForFirstNonemptyCandidateSet = results;
}
}
if (traceForFirstNonemptyCandidateSet != null) {
traceForFirstNonemptyCandidateSet.commit();
if (resultsForFirstNonemptyCandidateSet.isSingleResult()) {
debugInfo.set(
ResolutionDebugInfo.RESULT, resultsForFirstNonemptyCandidateSet.getResultingCall());
}
resolveFunctionArguments(context, resultsForFirstNonemptyCandidateSet);
} else {
context.trace.report(UNRESOLVED_REFERENCE.on(reference, reference));
argumentTypeResolver.checkTypesWithNoCallee(context, RESOLVE_FUNCTION_ARGUMENTS);
}
return resultsForFirstNonemptyCandidateSet != null
? resultsForFirstNonemptyCandidateSet
: OverloadResolutionResultsImpl.<F>nameNotFound();
}