Examples with TypeInferenceObserver org.finos.legend.pure.m3.compiler.postprocessing.inference.TypeInferenceObserver used on opensource projects

Example 1 with TypeInferenceObserver

use of org.finos.legend.pure.m3.compiler.postprocessing.inference.TypeInferenceObserver in project legend-pure by finos.

the class TypeInferenceContext method register.

public void register(GenericType templateGenType, GenericType genericType, TypeInferenceContext targetGenericsContext, TypeInferenceObserver observer) {
    Objects.requireNonNull(targetGenericsContext);
    if (genericType != null) {
        GenericType genericTypeCopy = (GenericType) org.finos.legend.pure.m3.navigation.generictype.GenericType.copyGenericType(genericType, true, this.processorSupport);
        String name = org.finos.legend.pure.m3.navigation.generictype.GenericType.getTypeParameterName(templateGenType);
        if (name != null) {
            ParameterValueWithFlag existing = this.states.getLast().getTypeParameterValueWithFlag(name);
            List<RegistrationRequest> forwards = Lists.mutable.empty();
            if (existing == null) {
                // New registration
                this.states.getLast().putTypeParameterValue(name, genericTypeCopy, targetGenericsContext, false);
            } else if (org.finos.legend.pure.m3.navigation.generictype.GenericType.isGenericTypeConcrete(existing.getParameterValue()) && org.finos.legend.pure.m3.navigation.generictype.GenericType.isGenericTypeConcrete(genericTypeCopy)) {
                // Merge two concrete types
                GenericType merged = (GenericType) org.finos.legend.pure.m3.navigation.generictype.GenericType.findBestCommonGenericType(Lists.mutable.with(existing.getParameterValue(), genericTypeCopy), TypeParameter.isCovariant(templateGenType), false, genericType.getSourceInformation(), this.processorSupport);
                this.states.getLast().putTypeParameterValue(name, merged, targetGenericsContext, false);
                // See if the replacement is the more concrete version of a previously semi-concrete type (List<T> replaced by List<String>)
                CoreInstance existingRawType = ((GenericType) existing.getParameterValue())._rawType();
                CoreInstance replacementRawType = merged._rawType();
                if (existingRawType.equals(replacementRawType)) {
                    Iterator<? extends GenericType> existingTypeArguments = ((GenericType) existing.getParameterValue())._typeArguments().iterator();
                    Iterator<? extends GenericType> replacementTypeArguments = merged._typeArguments().iterator();
                    while (existingTypeArguments.hasNext()) {
                        GenericType existingArgument = existingTypeArguments.next();
                        GenericType replacementArgument = replacementTypeArguments.next();
                        if (!org.finos.legend.pure.m3.navigation.generictype.GenericType.isGenericTypeConcrete(existingArgument) && org.finos.legend.pure.m3.navigation.generictype.GenericType.isGenericTypeConcrete(replacementArgument)) {
                            forwards.add(new RegistrationRequest(existing.getTargetGenericsContext(), existingArgument, replacementArgument));
                        }
                    }
                }
            } else if (this.states.size() > 1) {
                // We  are processing elements of a collection, record what we learn for the element which will later
                // be processed by TypeInference.potentiallyUpdateParentTypeParamForInstanceValueWithManyElements later
                this.states.getLast().putTypeParameterValue(name, genericTypeCopy, targetGenericsContext, false);
            } else if (org.finos.legend.pure.m3.navigation.generictype.GenericType.isGenericTypeConcrete(existing.getParameterValue())) {
                // Replace the existing concrete registration with a generic one and move the concrete one to the referenced type
                this.states.getLast().putTypeParameterValue(name, genericTypeCopy, targetGenericsContext, false);
                forwards.add(new RegistrationRequest(targetGenericsContext, genericTypeCopy, existing.getParameterValue()));
            } else if (org.finos.legend.pure.m3.navigation.generictype.GenericType.isGenericTypeConcrete(genericTypeCopy)) {
                if (!existing.getTargetGenericsContext().equals(this)) {
                    // forward the registration of this concrete type to the already referenced type
                    forwards.add(new RegistrationRequest(existing.getTargetGenericsContext(), existing.getParameterValue(), genericTypeCopy));
                }
            } else {
                if (!existing.getTargetGenericsContext().equals(this)) {
                    // forward the registration of this generic type to the already referenced type
                    forwards.add(new RegistrationRequest(existing.getTargetGenericsContext(), existing.getParameterValue(), genericTypeCopy));
                }
            }
            observer.register(templateGenType, genericTypeCopy, this, targetGenericsContext);
            observer.shiftTab();
            forwards.forEach(request -> request.context.register((GenericType) request.template, (GenericType) request.value, targetGenericsContext, observer));
            observer.unShiftTab();
        }
        if (org.finos.legend.pure.m3.navigation.generictype.GenericType.isGenericTypeConcrete(templateGenType) && org.finos.legend.pure.m3.navigation.generictype.GenericType.isGenericTypeConcrete(genericTypeCopy)) {
            if (!Type.isBottomType(ImportStub.withImportStubByPass(templateGenType._rawTypeCoreInstance(), this.processorSupport), this.processorSupport) && !Type.isBottomType(ImportStub.withImportStubByPass(genericTypeCopy._rawTypeCoreInstance(), this.processorSupport), this.processorSupport) && !Type.isTopType(ImportStub.withImportStubByPass(templateGenType._rawTypeCoreInstance(), this.processorSupport), this.processorSupport) && !Type.isTopType(ImportStub.withImportStubByPass(genericTypeCopy._rawTypeCoreInstance(), this.processorSupport), this.processorSupport)) {
                ListIterable<? extends CoreInstance> typeValues;
                ListIterable<? extends CoreInstance> mulValues;
                ListIterable<? extends CoreInstance> typeTemplates;
                ListIterable<? extends CoreInstance> mulTemplates;
                if (Type.subTypeOf(ImportStub.withImportStubByPass(templateGenType._rawTypeCoreInstance(), this.processorSupport), ImportStub.withImportStubByPass(genericTypeCopy._rawTypeCoreInstance(), this.processorSupport), this.processorSupport)) {
                    typeTemplates = extractTypes(org.finos.legend.pure.m3.navigation.generictype.GenericType.resolveClassTypeParameterUsingInheritance(templateGenType, genericTypeCopy, this.processorSupport));
                    mulTemplates = extractMuls(org.finos.legend.pure.m3.navigation.generictype.GenericType.resolveClassMultiplicityParameterUsingInheritance(templateGenType, ImportStub.withImportStubByPass(genericTypeCopy._rawTypeCoreInstance(), this.processorSupport), this.processorSupport));
                    typeValues = ListHelper.wrapListIterable(genericTypeCopy._typeArguments());
                    mulValues = ListHelper.wrapListIterable(genericTypeCopy._multiplicityArguments());
                } else {
                    typeTemplates = ListHelper.wrapListIterable(templateGenType._typeArguments());
                    mulTemplates = ListHelper.wrapListIterable(templateGenType._multiplicityArguments());
                    typeValues = extractTypes(org.finos.legend.pure.m3.navigation.generictype.GenericType.resolveClassTypeParameterUsingInheritance(genericTypeCopy, templateGenType, this.processorSupport));
                    mulValues = extractMuls(org.finos.legend.pure.m3.navigation.generictype.GenericType.resolveClassMultiplicityParameterUsingInheritance(genericTypeCopy, ImportStub.withImportStubByPass(templateGenType._rawTypeCoreInstance(), this.processorSupport), this.processorSupport));
                }
                for (int z = 0; z < mulValues.size(); z++) {
                    registerMul((Multiplicity) mulTemplates.get(z), (Multiplicity) mulValues.get(z), targetGenericsContext, observer);
                }
                for (int z = 0; z < typeValues.size(); z++) {
                    GenericType first = (GenericType) typeTemplates.get(z);
                    GenericType second = (GenericType) typeValues.get(z);
                    if (org.finos.legend.pure.m3.navigation.generictype.GenericType.isGenericTypeConcrete(first) && first._rawTypeCoreInstance() instanceof org.finos.legend.pure.m3.coreinstance.meta.pure.metamodel.type.FunctionType && org.finos.legend.pure.m3.navigation.generictype.GenericType.isGenericTypeConcrete(second) && second._rawTypeCoreInstance() instanceof org.finos.legend.pure.m3.coreinstance.meta.pure.metamodel.type.FunctionType) {
                        org.finos.legend.pure.m3.coreinstance.meta.pure.metamodel.type.FunctionType firstFuncType = (org.finos.legend.pure.m3.coreinstance.meta.pure.metamodel.type.FunctionType) first._rawTypeCoreInstance();
                        org.finos.legend.pure.m3.coreinstance.meta.pure.metamodel.type.FunctionType secondFuncType = (org.finos.legend.pure.m3.coreinstance.meta.pure.metamodel.type.FunctionType) second._rawTypeCoreInstance();
                        observer.register(first, second, this, targetGenericsContext);
                        observer.shiftTab();
                        ListIterable<? extends VariableExpression> firstParams = ListHelper.wrapListIterable(firstFuncType._parameters());
                        ListIterable<? extends VariableExpression> secondParams = ListHelper.wrapListIterable(secondFuncType._parameters());
                        for (int i = 0; i < firstParams.size(); i++) {
                            register(firstParams.get(i)._genericType(), secondParams.get(i)._genericType(), targetGenericsContext, observer);
                            registerMul(firstParams.get(i)._multiplicity(), secondParams.get(i)._multiplicity(), targetGenericsContext, observer);
                        }
                        register(firstFuncType._returnType(), secondFuncType._returnType(), targetGenericsContext, observer);
                        registerMul(firstFuncType._returnMultiplicity(), secondFuncType._returnMultiplicity(), targetGenericsContext, observer);
                        observer.unShiftTab();
                    } else {
                        register(first, second, targetGenericsContext, observer);
                    }
                }
            }
        }
    }
}

Example 2 with TypeInferenceObserver

use of org.finos.legend.pure.m3.compiler.postprocessing.inference.TypeInferenceObserver in project legend-pure by finos.

the class FunctionExpressionProcessor method firstPassTypeInference.

private boolean firstPassTypeInference(FunctionExpression functionExpression, ListIterable<? extends ValueSpecification> parametersValues, ProcessorState processorState, Matcher matcher, ModelRepository repository, Context context, ProcessorSupport processorSupport) throws PureCompilationException {
    TypeInferenceObserver observer = processorState.getObserver();
    int i = 0;
    observer.startProcessingFunctionExpression(functionExpression);
    boolean inferenceSuccess = true;
    observer.shiftTab();
    observer.startFirstPassParametersProcessing();
    observer.shiftTab();
    observer.shiftTab();
    org.eclipse.collections.api.block.function.Function<CoreInstance, Void> processElement = coreInstance -> {
        PostProcessor.processElement(matcher, coreInstance, processorState, processorSupport);
        return null;
    };
    for (ValueSpecification boundVariable : parametersValues) {
        observer.processingParameter(functionExpression, i, boundVariable);
        observer.shiftTab();
        MilestoningDatesPropagationFunctions.possiblyExecuteInNewMilestoningDateContext(functionExpression, boundVariable, processElement, processorState, repository, context, processorSupport);
        boolean success = this.isInferenceSuccess(boundVariable, processorSupport);
        observer.inferenceResult(success);
        inferenceSuccess = inferenceSuccess && success;
        addTraceForParameterValue(functionExpression, i, boundVariable, processorSupport);
        i++;
        observer.unShiftTab();
    }
    observer.unShiftTab();
    observer.unShiftTab();
    return inferenceSuccess;
}

Example 3 with TypeInferenceObserver

use of org.finos.legend.pure.m3.compiler.postprocessing.inference.TypeInferenceObserver in project legend-pure by finos.

the class FunctionExpressionProcessor method process.

@Override
public void process(FunctionExpression functionExpression, final ProcessorState state, final Matcher matcher, final ModelRepository repository, final Context context, final ProcessorSupport processorSupport) {
    TypeInferenceObserver observer = state.getObserver();
    state.pushTypeInferenceContext();
    ListIterable<? extends ValueSpecification> parametersValues = ListHelper.wrapListIterable(functionExpression._parametersValues());
    // Process the function's parameters (FIRST PASS)
    boolean inferenceSuccess = firstPassTypeInference(functionExpression, parametersValues, state, matcher, repository, context, processorSupport);
    // Function matching
    ListIterable<? extends Function<?>> foundFunctions = null != functionExpression._funcCoreInstance() ? Lists.immutable.with((Function<?>) ImportStub.withImportStubByPass(functionExpression._funcCoreInstance(), processorSupport)) : Lists.immutable.empty();
    String functionName = null;
    if (foundFunctions.isEmpty()) {
        // Check if the function is a property
        InstanceValue propertyNameInstanceVal = functionExpression._propertyName();
        if (null != propertyNameInstanceVal) {
            ValueSpecification source = parametersValues.get(0);
            String propertyName = ImportStub.withImportStubByPass(propertyNameInstanceVal._valuesCoreInstance().toList().get(0), processorSupport).getName();
            GenericType sourceGenericType = extractAndValidateGenericType(processorSupport, propertyName, source);
            // Is it an enum?
            if (org.finos.legend.pure.m3.navigation.generictype.GenericType.subTypeOf(sourceGenericType, org.finos.legend.pure.m3.navigation.type.Type.wrapGenericType(processorSupport.package_getByUserPath(M3Paths.Enumeration), processorSupport), processorSupport)) {
                reprocessEnumValueInExtractEnumValue(functionExpression, propertyName, state, repository, processorSupport);
            } else {
                Multiplicity sourceMultiplicity = source._multiplicity();
                if (org.finos.legend.pure.m3.navigation.multiplicity.Multiplicity.isToOne(sourceMultiplicity, true)) {
                    AbstractProperty<?> propertyFunc = findFunctionForPropertyBasedOnMultiplicity(functionExpression, sourceGenericType, state, processorSupport, matcher);
                    if (null != propertyFunc) {
                        if (MilestoningFunctions.isGeneratedMilestonedQualifiedPropertyWithMissingDates(propertyFunc, processorSupport)) {
                            propertyFunc = (AbstractProperty<?>) MilestoningDatesPropagationFunctions.getMilestoningQualifiedPropertyWithAllDatesSupplied(functionExpression, state, repository, context, processorSupport, propertyNameInstanceVal, source, propertyName, propertyFunc);
                        }
                        foundFunctions = Lists.immutable.with(propertyFunc);
                    }
                } else {
                    // Automap
                    reprocessPropertyForManySources(functionExpression, parametersValues, M3Properties.propertyName, sourceGenericType, repository, processorSupport);
                    // The parameters values are now different, so update
                    parametersValues = functionExpression._parametersValues().toList();
                    // Have another go at type inference
                    inferenceSuccess = firstPassTypeInference(functionExpression, parametersValues, state, matcher, repository, context, processorSupport);
                // return;
                }
            }
        } else // Check if the function is a qualifiedProperty
        {
            InstanceValue qualifiedPropertyNameVal = functionExpression._qualifiedPropertyName();
            if (null != qualifiedPropertyNameVal) {
                ValueSpecification source = parametersValues.get(0);
                String qualifiedPropertyName = ImportStub.withImportStubByPass(qualifiedPropertyNameVal._valuesCoreInstance().toList().get(0), processorSupport).getName();
                GenericType sourceGenericType = extractAndValidateGenericType(processorSupport, qualifiedPropertyName, source);
                Multiplicity sourceMultiplicity = source._multiplicity();
                // }
                if (org.finos.legend.pure.m3.navigation.multiplicity.Multiplicity.isToOne(sourceMultiplicity, true)) {
                    ListIterable<QualifiedProperty<?>> qualifiedPropertyFuncs = findFunctionsForQualifiedPropertyBasedOnMultiplicity(functionExpression, sourceGenericType, parametersValues, processorSupport, matcher, state);
                    if (qualifiedPropertyFuncs.size() == 1 && MilestoningFunctions.isGeneratedMilestonedQualifiedPropertyWithMissingDates(qualifiedPropertyFuncs.getFirst(), processorSupport)) {
                        Function<?> mqp = (Function<?>) MilestoningDatesPropagationFunctions.getMilestoningQualifiedPropertyWithAllDatesSupplied(functionExpression, state, repository, context, processorSupport, qualifiedPropertyNameVal, source, qualifiedPropertyName, qualifiedPropertyFuncs.getFirst());
                        foundFunctions = Lists.immutable.with(mqp);
                    } else {
                        foundFunctions = qualifiedPropertyFuncs;
                    }
                } else {
                    // Automap
                    reprocessPropertyForManySources(functionExpression, parametersValues, M3Properties.qualifiedPropertyName, sourceGenericType, repository, processorSupport);
                    // The parameters values are now different, so update
                    parametersValues = functionExpression._parametersValues().toList();
                    // Have another go at type inference
                    inferenceSuccess = firstPassTypeInference(functionExpression, parametersValues, state, matcher, repository, context, processorSupport);
                }
            }
        }
        if (foundFunctions.isEmpty()) {
            // Match the functionExpression with the Function library (may still need to do it even if the function is a property because it may have been reprocessed as a Collect!)
            foundFunctions = FunctionExpressionMatcher.findMatchingFunctionsInTheRepository(functionExpression, true, processorSupport);
            functionName = getFunctionName(functionExpression);
        }
    }
    Function<?> finalFunction = null;
    boolean someInferenceFailed = false;
    for (Function<?> foundFunction : foundFunctions) {
        functionExpression._funcRemove();
        functionExpression._funcCoreInstance(foundFunction);
        state.getTypeInferenceContext().setScope(foundFunction);
        FunctionType foundFunctionType = (FunctionType) processorSupport.function_getFunctionType(foundFunction);
        observer.functionMatched(foundFunction, foundFunctionType);
        // SECOND PASS
        ListIterable<? extends VariableExpression> paramsType = foundFunctionType._parameters().toList();
        // enumValues, autoMaps, etc...
        parametersValues = functionExpression._parametersValues().toList();
        boolean success = true;
        if (!inferenceSuccess) {
            observer.firstPassInferenceFailed();
            observer.shiftTab();
            observer.shiftTab();
            observer.matchTypeParamsFromFoundFunction(foundFunction);
            observer.shiftTab();
            for (int z = 0; z < parametersValues.size(); z++) {
                ValueSpecification instance = parametersValues.get(z);
                if (isInferenceSuccess(instance, processorSupport)) {
                    observer.matchParam(z);
                    GenericType templateGenType = paramsType.get(z)._genericType();
                    TypeInferenceContext typeInferenceContext = state.getTypeInferenceContext();
                    typeInferenceContext.register(templateGenType, instance._genericType(), typeInferenceContext.getTopContext(), observer);
                    typeInferenceContext.registerMul(paramsType.get(z)._multiplicity(), instance._multiplicity(), typeInferenceContext.getTopContext(), observer);
                } else {
                    observer.paramInferenceFailed(z);
                }
            }
            observer.unShiftTab();
            observer.reverseMatching();
            for (int z = 0; z < parametersValues.size(); z++) {
                final ValueSpecification instance = parametersValues.get(z);
                observer.processingParameter(functionExpression, z, instance);
                GenericType templateGenType = paramsType.get(z)._genericType();
                Multiplicity templateMultiplicity = paramsType.get(z)._multiplicity();
                GenericType resolvedGenericType = (GenericType) org.finos.legend.pure.m3.navigation.generictype.GenericType.makeTypeArgumentAsConcreteAsPossible(templateGenType, state.getTypeInferenceContext().getTypeParameterToGenericType(), state.getTypeInferenceContext().getMultiplicityParameterToMultiplicity(), processorSupport);
                Multiplicity resolvedMultiplicity = (Multiplicity) org.finos.legend.pure.m3.navigation.multiplicity.Multiplicity.makeMultiplicityAsConcreteAsPossible(templateMultiplicity, state.getTypeInferenceContext().getMultiplicityParameterToMultiplicity());
                if (isLambdaWithEmptyParamType(instance, processorSupport)) {
                    observer.shiftTab();
                    final VariableExpression templateToMatchLambdaTo = Objects.requireNonNull(getRawTypeFromGenericType(foundFunction, processorSupport))._parameters().toList().get(z);
                    observer.register(templateToMatchLambdaTo, templateToMatchLambdaTo, state.getTypeInferenceContext(), state.getTypeInferenceContext());
                    for (final CoreInstance val : ((InstanceValue) instance)._valuesCoreInstance()) {
                        if (val instanceof LambdaFunction) {
                            org.eclipse.collections.api.block.function.Function<CoreInstance, Boolean> processParamTypesOfLambdaUsedAsAFunctionExpressionParamValue = coreInstance -> !TypeInference.processParamTypesOfLambdaUsedAsAFunctionExpressionParamValue(instance, (LambdaFunction<?>) val, templateToMatchLambdaTo, matcher, state, repository, processorSupport);
                            success = success && MilestoningDatesPropagationFunctions.possiblyExecuteInNewMilestoningDateContext(functionExpression, val, processParamTypesOfLambdaUsedAsAFunctionExpressionParamValue, state, repository, context, processorSupport);
                            // Manage return type in any case
                            GenericType templateGenericType = templateToMatchLambdaTo._genericType();
                            ClassInstance functionClass = (ClassInstance) processorSupport.package_getByUserPath(M3Paths.Function);
                            if (org.finos.legend.pure.m3.navigation.generictype.GenericType.isGenericTypeConcrete(templateGenericType, processorSupport) && org.finos.legend.pure.m3.navigation.type.Type.subTypeOf(ImportStub.withImportStubByPass(templateGenericType._rawTypeCoreInstance(), processorSupport), functionClass, processorSupport)) {
                                GenericType templateGenFunctionType = templateGenericType._typeArguments().toList().get(0);
                                if (org.finos.legend.pure.m3.navigation.generictype.GenericType.isGenericTypeConcrete(templateGenFunctionType, processorSupport) && !org.finos.legend.pure.m3.navigation.type.Type.isTopType(Instance.getValueForMetaPropertyToOneResolved(templateGenFunctionType, M3Properties.rawType, processorSupport), processorSupport)) {
                                    GenericType templateReturnType = null != ImportStub.withImportStubByPass(templateGenFunctionType._rawTypeCoreInstance(), processorSupport) ? ((FunctionType) ImportStub.withImportStubByPass(templateGenFunctionType._rawTypeCoreInstance(), processorSupport))._returnType() : null;
                                    // Generics in lambdas are relative to their environment (i.e. the function in which they are defined)
                                    TypeInferenceContext lambdaInferenceContext = state.getTypeInferenceContext().getTopContext();
                                    if (null != templateReturnType) {
                                        FunctionType lambdaFunctionType = Objects.requireNonNull(getRawTypeFromGenericType((LambdaFunction<?>) val, processorSupport));
                                        GenericType concreteGenericType = (GenericType) org.finos.legend.pure.m3.navigation.generictype.GenericType.makeTypeArgumentAsConcreteAsPossible(lambdaFunctionType._returnType(), lambdaInferenceContext.getTypeParameterToGenericType(), lambdaInferenceContext.getMultiplicityParameterToMultiplicity(), processorSupport);
                                        lambdaFunctionType._returnTypeRemove();
                                        lambdaFunctionType._returnType(concreteGenericType);
                                        if (!org.finos.legend.pure.m3.navigation.generictype.GenericType.isGenericTypeConcrete(templateReturnType, processorSupport)) {
                                            TypeInferenceContext typeInferenceContext = state.getTypeInferenceContext();
                                            typeInferenceContext.register(templateReturnType, concreteGenericType, typeInferenceContext.getParent(), observer);
                                        }
                                    }
                                    Multiplicity templateReturnMultiplicity = null != ImportStub.withImportStubByPass(templateGenFunctionType._rawTypeCoreInstance(), processorSupport) ? ((FunctionType) ImportStub.withImportStubByPass(templateGenFunctionType._rawTypeCoreInstance(), processorSupport))._returnMultiplicity() : null;
                                    if (null != templateReturnMultiplicity) {
                                        FunctionType lambdaFunctionType = Objects.requireNonNull(getRawTypeFromGenericType((LambdaFunction<?>) val, processorSupport));
                                        Multiplicity concreteMultiplicity = (Multiplicity) org.finos.legend.pure.m3.navigation.multiplicity.Multiplicity.makeMultiplicityAsConcreteAsPossible(Instance.getValueForMetaPropertyToOneResolved(lambdaFunctionType, M3Properties.returnMultiplicity, processorSupport), lambdaInferenceContext.getMultiplicityParameterToMultiplicity());
                                        lambdaFunctionType._returnMultiplicityRemove();
                                        lambdaFunctionType._returnMultiplicity(concreteMultiplicity);
                                        if (null != concreteMultiplicity) {
                                            TypeInferenceContext typeInferenceContext = state.getTypeInferenceContext();
                                            typeInferenceContext.registerMul(templateReturnMultiplicity, concreteMultiplicity, typeInferenceContext.getParent(), observer);
                                        }
                                    }
                                }
                            }
                        }
                    }
                    observer.unShiftTab();
                } else {
                    state.pushTypeInferenceContextAhead();
                    TypeInferenceContext typeInferenceContext = state.getTypeInferenceContext();
                    typeInferenceContext.setScope(instance instanceof SimpleFunctionExpression ? ((SimpleFunctionExpression) instance)._funcCoreInstance() : null);
                    typeInferenceContext.register(instance._genericType(), resolvedGenericType, typeInferenceContext.getParent(), observer);
                    typeInferenceContext.registerMul(instance._multiplicity(), resolvedMultiplicity, typeInferenceContext.getParent(), observer);
                    cleanProcess(instance, state, repository, context, processorSupport);
                    PostProcessor.processElement(matcher, instance, state, processorSupport);
                    state.popTypeInferenceContextAhead();
                }
            }
            observer.unShiftTab();
            observer.unShiftTab();
        } else {
            observer.parameterInferenceSucceeded();
            observer.shiftTab();
            observer.shiftTab();
            parametersValues.forEachWithIndex((instance, z) -> {
                TypeInferenceContext typeInferenceContext = state.getTypeInferenceContext();
                typeInferenceContext.register(paramsType.get(z)._genericType(), instance._genericType(), typeInferenceContext.getTopContext(), observer);
                typeInferenceContext.registerMul(paramsType.get(z)._multiplicity(), instance._multiplicity(), typeInferenceContext.getTopContext(), observer);
            });
            // WARNING / returnType may need reverse matching to be found
            GenericType returnGenericType = (GenericType) org.finos.legend.pure.m3.navigation.generictype.GenericType.makeTypeArgumentAsConcreteAsPossible(foundFunctionType._returnType(), state.getTypeInferenceContext().getTypeParameterToGenericType(), state.getTypeInferenceContext().getMultiplicityParameterToMultiplicity(), processorSupport);
            observer.returnType(returnGenericType);
            if (!org.finos.legend.pure.m3.navigation.generictype.GenericType.isGenericTypeConcrete(returnGenericType, processorSupport) && !state.getTypeInferenceContext().isTop(org.finos.legend.pure.m3.navigation.generictype.GenericType.getTypeParameterName(returnGenericType, processorSupport))) {
                observer.shiftTab();
                observer.returnTypeNotConcrete();
                // reverse matching
                parametersValues.forEachWithIndex((instance, z) -> {
                    GenericType templateGenType = paramsType.get(z)._genericType();
                    Multiplicity templateMultiplicity = paramsType.get(z)._multiplicity();
                    GenericType resolvedGenericType = (GenericType) org.finos.legend.pure.m3.navigation.generictype.GenericType.makeTypeArgumentAsConcreteAsPossible(templateGenType, state.getTypeInferenceContext().getTypeParameterToGenericType(), state.getTypeInferenceContext().getMultiplicityParameterToMultiplicity(), processorSupport);
                    Multiplicity resolvedMultiplicity = (Multiplicity) org.finos.legend.pure.m3.navigation.multiplicity.Multiplicity.makeMultiplicityAsConcreteAsPossible(templateMultiplicity, state.getTypeInferenceContext().getMultiplicityParameterToMultiplicity());
                    state.pushTypeInferenceContextAhead();
                    state.getTypeInferenceContext().setScope(instance instanceof FunctionExpression ? ((FunctionExpression) instance)._funcCoreInstance() : null);
                    observer.processingParameter(functionExpression, z, instance);
                    TypeInferenceContext typeInferenceContext = state.getTypeInferenceContext();
                    typeInferenceContext.register(instance._genericType(), resolvedGenericType, typeInferenceContext.getParent(), observer);
                    typeInferenceContext.registerMul(instance._multiplicity(), resolvedMultiplicity, typeInferenceContext.getParent(), observer);
                    observer.shiftTab();
                    observer.reprocessingTheParameter();
                    observer.shiftTab();
                    cleanProcess(instance, state, repository, context, processorSupport);
                    PostProcessor.processElement(matcher, instance, state, processorSupport);
                    observer.unShiftTab();
                    observer.finishedProcessParameter();
                    observer.unShiftTab();
                    state.popTypeInferenceContextAhead();
                });
                observer.unShiftTab();
                returnGenericType = (GenericType) org.finos.legend.pure.m3.navigation.generictype.GenericType.makeTypeArgumentAsConcreteAsPossible(foundFunctionType._returnType(), state.getTypeInferenceContext().getTypeParameterToGenericType(), state.getTypeInferenceContext().getMultiplicityParameterToMultiplicity(), processorSupport);
                observer.newReturnType(returnGenericType);
            }
            observer.unShiftTab();
            observer.unShiftTab();
            observer.finishedRegisteringParametersAndMultiplicities();
        }
        // We can infer the parameter types for Lambdas given as parameters (now that we know which function to use).
        if (success) {
            TypeInference.storeInferredTypeParametersInFunctionExpression(functionExpression, state, processorSupport, foundFunction);
            // Get the return type information
            // Pair<CoreInstance, CoreInstance> result = FunctionExpression.resolveFunctionGenericReturnTypeAndMultiplicity(functionExpression, context, processorSupport);
            // result.getOne();
            GenericType returnGenericType = (GenericType) org.finos.legend.pure.m3.navigation.generictype.GenericType.makeTypeArgumentAsConcreteAsPossible(foundFunctionType._returnType(), state.getTypeInferenceContext().getTypeParameterToGenericType(), state.getTypeInferenceContext().getMultiplicityParameterToMultiplicity(), processorSupport);
            Multiplicity returnMultiplicity = (Multiplicity) org.finos.legend.pure.m3.navigation.multiplicity.Multiplicity.makeMultiplicityAsConcreteAsPossible(foundFunctionType._returnMultiplicity(), state.getTypeInferenceContext().getMultiplicityParameterToMultiplicity());
            if (!org.finos.legend.pure.m3.navigation.generictype.GenericType.isGenericTypeConcrete(returnGenericType, processorSupport) && !state.getTypeInferenceContext().isTop(org.finos.legend.pure.m3.navigation.generictype.GenericType.getTypeParameterName(returnGenericType, processorSupport))) {
                throw new PureCompilationException(functionExpression.getSourceInformation(), "The system is not capable of inferring the return type of the function '" + functionExpression.getValueForMetaPropertyToOne(M3Properties.func).getValueForMetaPropertyToOne(M3Properties.functionName).getName() + "'. Check your signatures!");
            }
            // Update the type
            GenericType genericTypeCopy = (GenericType) org.finos.legend.pure.m3.navigation.generictype.GenericType.copyGenericTypeAsInferredGenericType(returnGenericType, functionExpression.getSourceInformation(), processorSupport);
            functionExpression._genericType(genericTypeCopy);
            // Update the multiplicity
            Multiplicity returnMultiplicityCopy = (Multiplicity) org.finos.legend.pure.m3.navigation.multiplicity.Multiplicity.copyMultiplicity(returnMultiplicity, functionExpression.getSourceInformation(), processorSupport);
            functionExpression._multiplicity(returnMultiplicityCopy);
        } else {
            // Inference failed...
            FunctionType functionType = (FunctionType) processorSupport.function_getFunctionType(foundFunction);
            GenericType returnGenericType = functionType._returnType();
            GenericType genericTypeCopy = (GenericType) org.finos.legend.pure.m3.navigation.generictype.GenericType.copyGenericTypeAsInferredGenericType(returnGenericType, functionExpression.getSourceInformation(), processorSupport);
            functionExpression._genericType(genericTypeCopy);
            Multiplicity returnMultiplicity = functionType._returnMultiplicity();
            Multiplicity returnMultiplicityCopy = (Multiplicity) org.finos.legend.pure.m3.navigation.multiplicity.Multiplicity.copyMultiplicity(returnMultiplicity, functionExpression.getSourceInformation(), processorSupport);
            functionExpression._multiplicity(returnMultiplicityCopy);
        }
        if (null == functionName) {
            finalFunction = foundFunction;
        } else if (!success) {
            someInferenceFailed = true;
        } else {
            Function<?> bestMatch = FunctionExpressionMatcher.getBestFunctionMatch(foundFunctions, parametersValues, functionName, functionExpression.getSourceInformation(), false, processorSupport);
            if (bestMatch == foundFunction) {
                finalFunction = foundFunction;
            }
        }
        if (null != finalFunction) {
            break;
        }
        // Clean up before re-trying
        if (1 < foundFunctions.size()) {
            for (ValueSpecification parameterValue : parametersValues) {
                cleanProcess(parameterValue, state, repository, context, processorSupport);
            }
            inferenceSuccess = firstPassTypeInference(functionExpression, parametersValues, state, matcher, repository, context, processorSupport);
        }
    }
    if (null != finalFunction) {
        finalFunction._applications(Lists.immutable.<FunctionExpression>withAll(finalFunction._applications()).newWith(functionExpression));
        // Update the function in the function expression in the reverse
        if ("new_Class_1__String_1__KeyExpression_MANY__T_1_".equals(finalFunction.getName()) || "new_Class_1__String_1__T_1_".equals(finalFunction.getName())) {
            this.addTraceForKeyExpressions(functionExpression, processorSupport);
        }
        if ("copy_T_1__String_1__KeyExpression_MANY__T_1_".equals(finalFunction.getName()) || "copy_T_1__String_1__T_1_".equals(finalFunction.getName())) {
            this.addTraceForKeyExpressions(functionExpression, processorSupport);
        }
        if ("letFunction_String_1__T_m__T_m_".equals(finalFunction.getName())) {
            try {
                state.getVariableContext().getParent().registerValue(((InstanceValue) parametersValues.get(0))._valuesCoreInstance().toList().get(0).getName(), parametersValues.get(1));
            } catch (VariableNameConflictException e) {
                throw new PureCompilationException(functionExpression.getSourceInformation(), e.getMessage());
            }
        }
    } else if (!someInferenceFailed) {
        throwNoMatchException(functionExpression, state, processorSupport);
    }
    observer.unShiftTab();
    observer.finishedProcessingFunctionExpression(functionExpression);
    state.popTypeInferenceContext();
}