public static @NotNull BindingContext resolveToExpression(
@NotNull final ResolveSession resolveSession, @NotNull JetExpression expression) {
final DelegatingBindingTrace trace =
new DelegatingBindingTrace(
resolveSession.getBindingContext(), "trace to resolve expression", expression);
JetFile file = (JetFile) expression.getContainingFile();
@SuppressWarnings("unchecked")
PsiElement topmostCandidateForAdditionalResolve =
JetPsiUtil.getTopmostParentOfTypes(
expression,
JetNamedFunction.class,
JetClassInitializer.class,
JetProperty.class,
JetDelegationSpecifierList.class);
if (topmostCandidateForAdditionalResolve != null) {
if (topmostCandidateForAdditionalResolve instanceof JetNamedFunction) {
functionAdditionalResolve(
resolveSession, (JetNamedFunction) topmostCandidateForAdditionalResolve, trace, file);
} else if (topmostCandidateForAdditionalResolve instanceof JetClassInitializer) {
initializerAdditionalResolve(
resolveSession,
(JetClassInitializer) topmostCandidateForAdditionalResolve,
trace,
file);
} else if (topmostCandidateForAdditionalResolve instanceof JetProperty) {
propertyAdditionalResolve(
resolveSession, (JetProperty) topmostCandidateForAdditionalResolve, trace, file);
} else if (topmostCandidateForAdditionalResolve instanceof JetDelegationSpecifierList) {
delegationSpecifierAdditionalResolve(
resolveSession,
(JetDelegationSpecifierList) topmostCandidateForAdditionalResolve,
trace,
file);
} else {
assert false : "Invalid type of the topmost parent";
}
return trace.getBindingContext();
}
// Setup resolution scope explicitly
if (trace.getBindingContext().get(BindingContext.RESOLUTION_SCOPE, expression) == null) {
JetScope scope = getExpressionMemberScope(resolveSession, expression);
if (scope != null) {
trace.record(BindingContext.RESOLUTION_SCOPE, expression, scope);
}
}
return trace.getBindingContext();
}
public static JetScope getExpressionMemberScope(
@NotNull ResolveSession resolveSession, @NotNull JetExpression expression) {
DelegatingBindingTrace trace =
new DelegatingBindingTrace(
resolveSession.getBindingContext(),
"trace to resolve a member scope of expression",
expression);
if (expression instanceof JetReferenceExpression) {
QualifiedExpressionResolver qualifiedExpressionResolver =
resolveSession.getInjector().getQualifiedExpressionResolver();
// In some type declaration
if (expression.getParent() instanceof JetUserType) {
JetUserType qualifier = ((JetUserType) expression.getParent()).getQualifier();
if (qualifier != null) {
Collection<? extends DeclarationDescriptor> descriptors =
qualifiedExpressionResolver.lookupDescriptorsForUserType(
qualifier, getExpressionResolutionScope(resolveSession, expression), trace);
for (DeclarationDescriptor descriptor : descriptors) {
if (descriptor instanceof LazyPackageDescriptor) {
return ((LazyPackageDescriptor) descriptor).getMemberScope();
}
}
}
}
// Inside import
if (PsiTreeUtil.getParentOfType(expression, JetImportDirective.class, false) != null) {
NamespaceDescriptor rootPackage = resolveSession.getPackageDescriptorByFqName(FqName.ROOT);
assert rootPackage != null;
if (expression.getParent() instanceof JetDotQualifiedExpression) {
JetExpression element =
((JetDotQualifiedExpression) expression.getParent()).getReceiverExpression();
String name = ((JetFile) expression.getContainingFile()).getPackageName();
NamespaceDescriptor filePackage =
name != null
? resolveSession.getPackageDescriptorByFqName(new FqName(name))
: rootPackage;
assert filePackage != null : "File package should be already resolved and be found";
JetScope scope = filePackage.getMemberScope();
Collection<? extends DeclarationDescriptor> descriptors;
if (element instanceof JetDotQualifiedExpression) {
descriptors =
qualifiedExpressionResolver.lookupDescriptorsForQualifiedExpression(
(JetDotQualifiedExpression) element,
rootPackage.getMemberScope(),
scope,
trace,
false,
false);
} else {
descriptors =
qualifiedExpressionResolver.lookupDescriptorsForSimpleNameReference(
(JetSimpleNameExpression) element,
rootPackage.getMemberScope(),
scope,
trace,
false,
false,
false);
}
for (DeclarationDescriptor descriptor : descriptors) {
if (descriptor instanceof NamespaceDescriptor) {
return ((NamespaceDescriptor) descriptor).getMemberScope();
}
}
} else {
return rootPackage.getMemberScope();
}
}
// Inside package declaration
JetNamespaceHeader namespaceHeader =
PsiTreeUtil.getParentOfType(expression, JetNamespaceHeader.class, false);
if (namespaceHeader != null) {
NamespaceDescriptor packageDescriptor =
resolveSession.getPackageDescriptorByFqName(
namespaceHeader.getParentFqName((JetReferenceExpression) expression));
if (packageDescriptor != null) {
return packageDescriptor.getMemberScope();
}
}
}
return null;
}