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Find Nothing only in own arguments of generic type to make type raw and generate ''?" for contravariant position instead of use raw type

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This commit is contained in:
Zalim Bashorov
2015-12-07 16:20:06 +03:00
parent fa77808319
commit 1e0b133e19
3 changed files with 47 additions and 23 deletions
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compiler/backend/src/org/jetbrains/kotlin/codegen/state/JetTypeMapper.java
+27 -17
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@@ -20,7 +20,6 @@ import com.intellij.openapi.util.text.StringUtil;
import com.intellij.psi.PsiElement;
import kotlin.CollectionsKt;
import kotlin.Pair;
import kotlin.jvm.functions.Function1;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.kotlin.builtins.BuiltinsPackageFragment;
@@ -581,7 +580,14 @@ public class JetTypeMapper {
@NotNull TypeMappingMode mode
) {
if (signatureVisitor != null) {
if (hasNothingInArguments(type) || type.getArguments().isEmpty()) {
// Nothing mapping rules:
// Map<Nothing, Foo> -> Map
// Map<Foo, List<Nothing>> -> Map<Foo, List>
// In<Nothing, Foo> == In<*, Foo> -> In<?, Foo>
// In<Nothing, Nothing> -> In
// Inv<in Nothing, Foo> -> Inv
if (hasNothingInNonContravariantPosition(type) || type.getArguments().isEmpty()) {
signatureVisitor.writeAsmType(asmType);
return;
}
@@ -638,7 +644,11 @@ public class JetTypeMapper {
TypeParameterDescriptor parameter = item.getFirst();
TypeProjection argument = item.getSecond();
if (argument.isStarProjection()) {
if (
argument.isStarProjection() ||
// In<Nothing, Foo> == In<*, Foo> -> In<?, Foo>
KotlinBuiltIns.isNothing(argument.getType()) && parameter.getVariance() == Variance.IN_VARIANCE
) {
signatureVisitor.writeUnboundedWildcard();
}
else {
@@ -656,22 +666,22 @@ public class JetTypeMapper {
}
}
private static boolean hasNothingInArguments(KotlinType jetType) {
boolean hasNothingInArguments = CollectionsKt.any(jetType.getArguments(), new Function1<TypeProjection, Boolean>() {
@Override
public Boolean invoke(TypeProjection projection) {
return KotlinBuiltIns.isNothingOrNullableNothing(projection.getType());
}
});
private static boolean hasNothingInNonContravariantPosition(KotlinType kotlinType) {
List<TypeParameterDescriptor> parameters = kotlinType.getConstructor().getParameters();
List<TypeProjection> arguments = kotlinType.getArguments();
if (hasNothingInArguments) return true;
for (int i = 0; i < arguments.size(); i++) {
TypeProjection projection = arguments.get(i);
return CollectionsKt.any(jetType.getArguments(), new Function1<TypeProjection, Boolean>() {
@Override
public Boolean invoke(TypeProjection projection) {
return !projection.isStarProjection() && hasNothingInArguments(projection.getType());
}
});
if (projection.isStarProjection()) continue;
KotlinType type = projection.getType();
if (KotlinBuiltIns.isNullableNothing(type) ||
KotlinBuiltIns.isNothing(type) && parameters.get(i).getVariance() != Variance.IN_VARIANCE) return true;
}
return false;
}
@NotNull