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forbid import of functions and properties from objects

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This commit is contained in:
svtk
2012-01-12 18:39:25 +04:00
parent 5cb15c6e48
commit 390eb0cde3
5 changed files with 76 additions and 64 deletions
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compiler/frontend/src/org/jetbrains/jet/lang/diagnostics/Errors.java
+2
View File
@@ -84,6 +84,8 @@ public interface Errors {
SimpleDiagnosticFactory EXPRESSION_EXPECTED_NAMESPACE_FOUND = SimpleDiagnosticFactory.create(ERROR, "Expression expected, but a namespace name found");
ParameterizedDiagnosticFactory1<DeclarationDescriptor> CANNOT_IMPORT_FROM_ELEMENT = ParameterizedDiagnosticFactory1.create(ERROR, "Cannot import from ''{0}''", NAME);
ParameterizedDiagnosticFactory1<DeclarationDescriptor> CANNOT_BE_IMPORTED = ParameterizedDiagnosticFactory1.create(ERROR, "Cannot import ''{0}'', functions and properties can be imported only from packages", NAME);
SimpleDiagnosticFactory USELESS_IMPORT = SimpleDiagnosticFactory.create(ERROR, "Useless import");
SimpleDiagnosticFactory CANNOT_INFER_PARAMETER_TYPE = SimpleDiagnosticFactory.create(ERROR, "Cannot infer a type for this parameter. To specify it explicitly use the {(p : Type) => ...} notation");
compiler/frontend/src/org/jetbrains/jet/lang/resolve/ImportsResolver.java
+48 -46
View File
@@ -1,5 +1,7 @@
package org.jetbrains.jet.lang.resolve;
import com.google.common.base.Predicate;
import com.google.common.collect.Collections2;
import com.google.common.collect.Lists;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
@@ -75,13 +77,8 @@ public class ImportsResolver {
}
else {
assert importedReference instanceof JetSimpleNameExpression;
// for "import java.*" there's should be a correct resolving
// but for "import SomeClass" we want to get unresolved error, even if SomeClass descriptor exist in outer scope
JetScope resolveScope = importDirective.isAllUnder() ? namespaceScope : JetScope.EMPTY;
descriptors = lookupDescriptorsForSimpleNameReference((JetSimpleNameExpression) importedReference,
resolveScope, namespaceScope, !importDirective.isAllUnder());
namespaceScope, true, !importDirective.isAllUnder());
}
JetSimpleNameExpression referenceExpression = getLastReference(importedReference);
@@ -174,7 +171,7 @@ public class ImportsResolver {
}
else {
assert receiverExpression instanceof JetSimpleNameExpression;
declarationDescriptors = lookupDescriptorsForSimpleNameReference((JetSimpleNameExpression) receiverExpression, outerScope, false);
declarationDescriptors = lookupDescriptorsForSimpleNameReference((JetSimpleNameExpression) receiverExpression, outerScope, true, false);
}
JetExpression selectorExpression = importedReference.getSelectorExpression();
@@ -187,7 +184,7 @@ public class ImportsResolver {
Collection<? extends DeclarationDescriptor> result;
for (DeclarationDescriptor declarationDescriptor : declarationDescriptors) {
if (declarationDescriptor instanceof NamespaceDescriptor) {
result = lookupDescriptorsForSimpleNameReference(selector, ((NamespaceDescriptor) declarationDescriptor).getMemberScope(), isForLastPart);
result = lookupDescriptorsForSimpleNameReference(selector, ((NamespaceDescriptor) declarationDescriptor).getMemberScope(), true, isForLastPart);
if (!result.isEmpty()) return result;
}
if (declarationDescriptor instanceof ClassDescriptor) {
@@ -268,7 +265,7 @@ public class ImportsResolver {
//on second phase class descriptor is only a descriptor for class object
JetType classObjectType = classDescriptor.getClassObjectType();
if (classObjectType == null) return Collections.emptyList();
return lookupDescriptorsForSimpleNameReference(memberReference, classObjectType.getMemberScope(), true);
return lookupDescriptorsForSimpleNameReference(memberReference, classObjectType.getMemberScope(), false, true);
}
@NotNull
@@ -278,43 +275,22 @@ public class ImportsResolver {
ClassDescriptor innerClass = classDescriptor.getInnerClassOrObject(memberReference.getReferencedName());
if (innerClass == null) return Collections.emptyList();
descriptors = Collections.<DeclarationDescriptor>singletonList(innerClass);
storeResolutionResult(descriptors, memberReference, JetScope.EMPTY, true);
return descriptors;
return filterResolutionResult(descriptors, memberReference, JetScope.EMPTY, false, true);
}
private Collection<DeclarationDescriptor> lookupVariableMembers(@NotNull JetSimpleNameExpression memberReference, @NotNull VariableDescriptor variableDescriptor) {
private Collection<? extends DeclarationDescriptor> lookupVariableMembers(@NotNull JetSimpleNameExpression memberReference, @NotNull VariableDescriptor variableDescriptor) {
assert !firstPhase;
JetType variableType = variableDescriptor.getReturnType();
if (variableType == null) return Collections.emptyList();
return lookupDescriptorsForSimpleNameReference(memberReference, variableType.getMemberScope(), true);
return lookupDescriptorsForSimpleNameReference(memberReference, variableType.getMemberScope(), false, true);
}
@NotNull
private Collection<DeclarationDescriptor> lookupDescriptorsForSimpleNameReference(
private Collection<? extends DeclarationDescriptor> lookupDescriptorsForSimpleNameReference(
@NotNull JetSimpleNameExpression referenceExpression,
@NotNull JetScope outerScope,
boolean isLastPart) {
return lookupDescriptorsForSimpleNameReference(referenceExpression, outerScope, outerScope, isLastPart);
}
/**
*
* @param referenceExpression
* @param outerScope
* @param bindingScope scope for searching completion descriptors. In most cases it's equal to outer scope
* but for case "import SomeIdentifier" we want an unresolved reference error, so give empty
* outer scope.
* @param isLastPart is the part given by referenceExpression last in import directive. Parameter should be false
* if there's .* after it or some other parts in full qualified name.
* @return
*/
@NotNull
private Collection<DeclarationDescriptor> lookupDescriptorsForSimpleNameReference(
@NotNull JetSimpleNameExpression referenceExpression,
@NotNull JetScope outerScope,
@NotNull JetScope bindingScope,
boolean namespaceLevel,
boolean isLastPart) {
List<DeclarationDescriptor> descriptors = Lists.newArrayList();
@@ -336,32 +312,58 @@ public class ImportsResolver {
}
}
storeResolutionResult(descriptors, referenceExpression, bindingScope, isLastPart);
return descriptors;
return filterResolutionResult(descriptors, referenceExpression, outerScope, namespaceLevel, isLastPart);
}
private void storeResolutionResult(
private Collection<? extends DeclarationDescriptor> filterResolutionResult(
@NotNull Collection<? extends DeclarationDescriptor> descriptors,
@NotNull JetSimpleNameExpression referenceExpression,
@NotNull JetScope resolutionScope,
boolean namespaceLevel, //functions and properties can be imported
boolean isLastPart) {
if (firstPhase) return;
if (descriptors.size() == 1 && !(isLastPart && descriptors.iterator().next() instanceof NamespaceDescriptor)) {
trace.record(BindingContext.REFERENCE_TARGET, referenceExpression, descriptors.iterator().next());
if (firstPhase) {
return Collections2.filter(descriptors, new Predicate<DeclarationDescriptor>() {
@Override
public boolean apply(@Nullable DeclarationDescriptor descriptor) {
return (descriptor instanceof ClassDescriptor) ||
(descriptor instanceof NamespaceDescriptor);
}
});
}
else if (descriptors.size() > 1) {
trace.record(BindingContext.AMBIGUOUS_REFERENCE_TARGET, referenceExpression, descriptors);
Collection<? extends DeclarationDescriptor> filteredDescriptors;
if (namespaceLevel) {
filteredDescriptors = descriptors;
}
else {
trace.report(UNRESOLVED_REFERENCE.on(referenceExpression));
filteredDescriptors = Collections2.filter(descriptors, new Predicate<DeclarationDescriptor>() {
@Override
public boolean apply(@Nullable DeclarationDescriptor descriptor) {
return (descriptor instanceof NamespaceDescriptor) ||
(descriptor instanceof ClassDescriptor) ||
(descriptor instanceof VariableDescriptor && ((VariableDescriptor) descriptor).isObjectDeclaration());
}
});
}
if (descriptors.size() == 1 && filteredDescriptors.size() <= 1) {
trace.record(BindingContext.REFERENCE_TARGET, referenceExpression, descriptors.iterator().next());
}
if (filteredDescriptors.isEmpty()) {
if (!descriptors.isEmpty()) {
trace.report(CANNOT_BE_IMPORTED.on(referenceExpression, descriptors.iterator().next()));
}
else {
trace.report(UNRESOLVED_REFERENCE.on(referenceExpression));
}
}
else if (filteredDescriptors.size() > 1) {
trace.record(BindingContext.AMBIGUOUS_REFERENCE_TARGET, referenceExpression, descriptors);
}
// If it's not an ambiguous case - store resolution scope
if (descriptors.size() <= 1) {
trace.record(BindingContext.RESOLUTION_SCOPE, referenceExpression, resolutionScope);
}
return filteredDescriptors;
}
}
}