@NotNull
public static List<ValueParameterDescriptor> getValueParameters(
@NotNull FunctionDescriptor functionDescriptor, @NotNull KotlinType type) {
assert isFunctionOrExtensionFunctionType(type);
List<TypeProjection> parameterTypes = getParameterTypeProjectionsFromFunctionType(type);
List<ValueParameterDescriptor> valueParameters =
new ArrayList<ValueParameterDescriptor>(parameterTypes.size());
for (int i = 0; i < parameterTypes.size(); i++) {
TypeProjection parameterType = parameterTypes.get(i);
ValueParameterDescriptorImpl valueParameterDescriptor =
new ValueParameterDescriptorImpl(
functionDescriptor,
null,
i,
Annotations.Companion.getEMPTY(),
Name.identifier("p" + (i + 1)),
parameterType.getType(),
/* declaresDefaultValue = */ false,
/* isCrossinline = */ false,
/* isNoinline = */ false,
null,
SourceElement.NO_SOURCE);
valueParameters.add(valueParameterDescriptor);
}
return valueParameters;
}
@NotNull
public static List<TypeProjection> getParameterTypeProjectionsFromFunctionType(
@NotNull JetType type) {
assert isFunctionOrExtensionFunctionType(type);
List<TypeProjection> arguments = type.getArguments();
int first = isExtensionFunctionType(type) ? 1 : 0;
int last = arguments.size() - 2;
List<TypeProjection> parameterTypes = new ArrayList<TypeProjection>(last - first + 1);
for (int i = first; i <= last; i++) {
parameterTypes.add(arguments.get(i));
}
return parameterTypes;
}
@NotNull
public static List<TypeProjection> getParameterTypeProjectionsFromFunctionType(
@NotNull KotlinType type) {
assert isFunctionOrExtensionFunctionType(type);
List<TypeProjection> arguments = type.getArguments();
int first = isExtensionFunctionType(type) ? 1 : 0;
int last = arguments.size() - 2;
// TODO: fix bugs associated with this here and in neighboring methods, see KT-9820
assert first <= last + 1 : "Not an exact function type: " + type;
List<TypeProjection> parameterTypes = new ArrayList<TypeProjection>(last - first + 1);
for (int i = first; i <= last; i++) {
parameterTypes.add(arguments.get(i));
}
return parameterTypes;
}
@NotNull
public static KotlinType getReturnTypeFromFunctionType(@NotNull KotlinType type) {
assert isFunctionOrExtensionFunctionType(type);
List<TypeProjection> arguments = type.getArguments();
return arguments.get(arguments.size() - 1).getType();
}
