示例#1
0
 public Map<String, JetType> getPrimitiveTypesMap() {
   if (primitiveTypesMap == null) {
     primitiveTypesMap = new HashMap<String, JetType>();
     for (JvmPrimitiveType jvmPrimitiveType : JvmPrimitiveType.values()) {
       PrimitiveType primitiveType = jvmPrimitiveType.getPrimitiveType();
       primitiveTypesMap.put(
           jvmPrimitiveType.getName(), standardLibrary.getPrimitiveJetType(primitiveType));
       primitiveTypesMap.put(
           "[" + jvmPrimitiveType.getName(),
           standardLibrary.getPrimitiveArrayJetType(primitiveType));
       primitiveTypesMap.put(
           jvmPrimitiveType.getWrapper().getFqName(),
           standardLibrary.getNullablePrimitiveJetType(primitiveType));
     }
     primitiveTypesMap.put("void", JetStandardClasses.getUnitType());
   }
   return primitiveTypesMap;
 }
 private JetType getPrimitiveType(char descriptor, boolean nullable) {
   if (!nullable) {
     for (JvmPrimitiveType jvmPrimitiveType : JvmPrimitiveType.values()) {
       if (jvmPrimitiveType.getJvmLetter() == descriptor) {
         return jetStandardLibrary.getPrimitiveJetType(jvmPrimitiveType.getPrimitiveType());
       }
     }
     if (descriptor == 'V') {
       return JetStandardClasses.getUnitType();
     }
   } else {
     for (JvmPrimitiveType jvmPrimitiveType : JvmPrimitiveType.values()) {
       if (jvmPrimitiveType.getJvmLetter() == descriptor) {
         return jetStandardLibrary.getNullablePrimitiveJetType(
             jvmPrimitiveType.getPrimitiveType());
       }
     }
     if (descriptor == 'V') {
       throw new IllegalStateException("incorrect signature: nullable void");
     }
   }
   throw new IllegalStateException("incorrect signature");
 }
  @Override
  public JetType visitFunctionLiteralExpression(
      JetFunctionLiteralExpression expression, ExpressionTypingContext context) {
    JetFunctionLiteral functionLiteral = expression.getFunctionLiteral();
    JetBlockExpression bodyExpression = functionLiteral.getBodyExpression();
    if (bodyExpression == null) return null;

    JetType expectedType = context.expectedType;
    boolean functionTypeExpected =
        expectedType != TypeUtils.NO_EXPECTED_TYPE
            && JetStandardClasses.isFunctionType(expectedType);

    NamedFunctionDescriptorImpl functionDescriptor =
        createFunctionDescriptor(expression, context, functionTypeExpected);

    List<JetType> parameterTypes = Lists.newArrayList();
    List<ValueParameterDescriptor> valueParameters = functionDescriptor.getValueParameters();
    for (ValueParameterDescriptor valueParameter : valueParameters) {
      parameterTypes.add(valueParameter.getOutType());
    }
    ReceiverDescriptor receiverParameter = functionDescriptor.getReceiverParameter();
    JetType receiver = receiverParameter != NO_RECEIVER ? receiverParameter.getType() : null;

    JetType returnType = TypeUtils.NO_EXPECTED_TYPE;
    JetScope functionInnerScope =
        FunctionDescriptorUtil.getFunctionInnerScope(
            context.scope, functionDescriptor, context.trace);
    JetTypeReference returnTypeRef = functionLiteral.getReturnTypeRef();
    if (returnTypeRef != null) {
      returnType = context.getTypeResolver().resolveType(context.scope, returnTypeRef);
      context
          .getServices()
          .checkFunctionReturnType(
              expression,
              context
                  .replaceScope(functionInnerScope)
                  .replaceExpectedType(returnType)
                  .replaceExpectedReturnType(returnType)
                  .replaceDataFlowInfo(context.dataFlowInfo));
    } else {
      if (functionTypeExpected) {
        returnType = JetStandardClasses.getReturnTypeFromFunctionType(expectedType);
      }
      returnType =
          context
              .getServices()
              .getBlockReturnedType(
                  functionInnerScope,
                  bodyExpression,
                  CoercionStrategy.COERCION_TO_UNIT,
                  context.replaceExpectedType(returnType).replaceExpectedReturnType(returnType));
    }
    JetType safeReturnType =
        returnType == null ? ErrorUtils.createErrorType("<return type>") : returnType;
    functionDescriptor.setReturnType(safeReturnType);

    boolean hasDeclaredValueParameters = functionLiteral.getValueParameterList() != null;
    if (!hasDeclaredValueParameters && functionTypeExpected) {
      JetType expectedReturnType = JetStandardClasses.getReturnTypeFromFunctionType(expectedType);
      if (JetStandardClasses.isUnit(expectedReturnType)) {
        functionDescriptor.setReturnType(JetStandardClasses.getUnitType());
        return DataFlowUtils.checkType(
            JetStandardClasses.getFunctionType(
                Collections.<AnnotationDescriptor>emptyList(),
                receiver,
                parameterTypes,
                JetStandardClasses.getUnitType()),
            expression,
            context);
      }
    }
    return DataFlowUtils.checkType(
        JetStandardClasses.getFunctionType(
            Collections.<AnnotationDescriptor>emptyList(),
            receiver,
            parameterTypes,
            safeReturnType),
        expression,
        context);
  }