Examples with RuleEnvironment org.eclipse.xsemantics.runtime.RuleEnvironment used on opensource projects

Example 21 with RuleEnvironment

use of org.eclipse.xsemantics.runtime.RuleEnvironment in project n4js by eclipse.

the class InternalTypeSystem method applyRuleExpectedTypeOfArgument.

protected Result<TypeRef> applyRuleExpectedTypeOfArgument(final RuleEnvironment G, final RuleApplicationTrace _trace_, final Argument argument, final Expression argumentExpression) throws RuleFailedException {
    // output parameter
    TypeRef T = null;
    final EObject expr = argument.eContainer();
    if ((expr instanceof NewExpression)) {
        boolean _contains = ((NewExpression) expr).getArguments().contains(argument);
        boolean _not = (!_contains);
        if (_not) {
        } else {
            /* G |- expr.callee : var TypeTypeRef ctorTypeRef */
            Expression _callee = ((NewExpression) expr).getCallee();
            TypeTypeRef ctorTypeRef = null;
            Result<TypeRef> result = typeInternal(G, _trace_, _callee);
            checkAssignableTo(result.getFirst(), TypeTypeRef.class);
            ctorTypeRef = (TypeTypeRef) result.getFirst();
            TypeRef typeRefOfInstanceToCreate = this.typeSystemHelper.createTypeRefFromStaticType(G, ctorTypeRef, ((TypeArgument[]) Conversions.unwrapArray(((NewExpression) expr).getTypeArgs(), TypeArgument.class)));
            Type _declaredType = typeRefOfInstanceToCreate.getDeclaredType();
            ContainerType<?> typeOfInstanceToCreate = ((ContainerType<?>) _declaredType);
            final RuleEnvironment G2 = RuleEnvironmentExtensions.wrap(G);
            this.typeSystemHelper.addSubstitutions(G2, typeRefOfInstanceToCreate);
            RuleEnvironmentExtensions.addThisType(G2, typeRefOfInstanceToCreate);
            TMethod ctor = this.containerTypesHelper.fromContext(((NewExpression) expr).eResource()).findConstructor(typeOfInstanceToCreate);
            TFormalParameter _fparForArgIdx = null;
            if (ctor != null) {
                _fparForArgIdx = ctor.getFparForArgIdx(ECollections.indexOf(((NewExpression) expr).getArguments(), argument, 0));
            }
            final TFormalParameter fpar = _fparForArgIdx;
            if ((fpar == null)) {
                T = TypeRefsFactory.eINSTANCE.createUnknownTypeRef();
            } else {
                final TypeRef paramType = fpar.getTypeRef();
                if ((paramType == null)) {
                    T = RuleEnvironmentExtensions.anyTypeRef(G2);
                } else {
                    /* G2 |- paramType ~> T */
                    Result<TypeArgument> result_1 = substTypeVariablesInternal(G2, _trace_, paramType);
                    checkAssignableTo(result_1.getFirst(), TypeRef.class);
                    T = (TypeRef) result_1.getFirst();
                }
            }
        }
    } else {
        if ((expr instanceof ParameterizedCallExpression)) {
            boolean _contains_1 = ((ParameterizedCallExpression) expr).getArguments().contains(argument);
            /* expr.arguments.contains(argument) */
            if (!_contains_1) {
                sneakyThrowRuleFailedException("expr.arguments.contains(argument)");
            }
            /* G |- expr.target : var TypeRef targetTypeRef */
            Expression _target = ((ParameterizedCallExpression) expr).getTarget();
            TypeRef targetTypeRef = null;
            Result<TypeRef> result_2 = typeInternal(G, _trace_, _target);
            checkAssignableTo(result_2.getFirst(), TypeRef.class);
            targetTypeRef = (TypeRef) result_2.getFirst();
            if ((targetTypeRef instanceof FunctionTypeExprOrRef)) {
                final FunctionTypeExprOrRef F = ((FunctionTypeExprOrRef) targetTypeRef);
                final int argIndex = ECollections.indexOf(((ParameterizedCallExpression) expr).getArguments(), argument, 0);
                final TFormalParameter fpar_1 = F.getFparForArgIdx(argIndex);
                if ((fpar_1 == null)) {
                    T = TypeRefsFactory.eINSTANCE.createUnknownTypeRef();
                } else {
                    final TypeRef paramType_1 = fpar_1.getTypeRef();
                    if ((paramType_1 == null)) {
                        T = RuleEnvironmentExtensions.anyTypeRef(G);
                    } else {
                        final RuleEnvironment G2_1 = RuleEnvironmentExtensions.wrap(G);
                        this.typeSystemHelper.addSubstitutions(G2_1, ((ParameterizedCallExpression) expr), F);
                        Expression _target_1 = ((ParameterizedCallExpression) expr).getTarget();
                        if ((_target_1 instanceof SuperLiteral)) {
                            N4ClassDeclaration _containerOfType = EcoreUtil2.<N4ClassDeclaration>getContainerOfType(expr, N4ClassDeclaration.class);
                            Type _definedType = null;
                            if (_containerOfType != null) {
                                _definedType = _containerOfType.getDefinedType();
                            }
                            final Type containingClass = _definedType;
                            if ((containingClass instanceof TClass)) {
                                RuleEnvironmentExtensions.addThisType(G2_1, TypeExtensions.ref(containingClass));
                                ParameterizedTypeRef _superClassRef = ((TClass) containingClass).getSuperClassRef();
                                boolean _tripleNotEquals = (_superClassRef != null);
                                if (_tripleNotEquals) {
                                    this.typeSystemHelper.addSubstitutions(G2_1, ((TClass) containingClass).getSuperClassRef());
                                }
                                if ((paramType_1 instanceof ThisTypeRefStructural)) {
                                    RuleEnvironmentExtensions.addThisType(G2_1, ((TClass) containingClass).getSuperClassRef());
                                }
                            }
                        }
                        /* G2 |- paramType ~> T */
                        Result<TypeArgument> result_3 = substTypeVariablesInternal(G2_1, _trace_, paramType_1);
                        checkAssignableTo(result_3.getFirst(), TypeRef.class);
                        T = (TypeRef) result_3.getFirst();
                    }
                }
            } else {
                T = TypeRefsFactory.eINSTANCE.createUnknownTypeRef();
            }
        }
    }
    return new Result<TypeRef>(T);
}

Example 22 with RuleEnvironment

use of org.eclipse.xsemantics.runtime.RuleEnvironment in project n4js by eclipse.

the class InternalTypeSystem method applyRuleTypeIndexedAccessExpression.

protected Result<TypeRef> applyRuleTypeIndexedAccessExpression(final RuleEnvironment G, final RuleApplicationTrace _trace_, final IndexedAccessExpression expr) throws RuleFailedException {
    // output parameter
    TypeRef T = null;
    /* { expr.target === null || expr.index === null; T = TypeRefsFactory.eINSTANCE.createUnknownTypeRef } or { expr.target instanceof SuperLiteral T = TypeRefsFactory.eINSTANCE.createUnknownTypeRef } or { G |- expr.target : var TypeRef targetTypeRef targetTypeRef = typeSystemHelper.resolveType(G, targetTypeRef); G |- expr.index : var TypeRef indexTypeRef; val targetDeclType = targetTypeRef.declaredType; val targetIsLiteralOfStringBasedEnum = targetDeclType instanceof TEnum && AnnotationDefinition.STRING_BASED.hasAnnotation(targetDeclType); val indexIsNumeric = { G |- indexTypeRef <: G.numberTypeRef }; val indexValue = ASTMetaInfoUtils.getCompileTimeValue(expr.index); val memberName = N4JSLanguageUtils.derivePropertyNameFromCompileTimeValue(indexValue); if (indexIsNumeric && (targetTypeRef.isArrayLike || targetIsLiteralOfStringBasedEnum)) { if (targetDeclType.generic && targetTypeRef.typeArgs.isEmpty) { T = G.anyTypeRef } else { val G2 = G.wrap typeSystemHelper.addSubstitutions(G2, targetTypeRef) G2.addThisType(targetTypeRef) val elementTypeRef = if(targetIsLiteralOfStringBasedEnum) { G.stringType.elementType } else { targetDeclType.elementType }; G2 |- elementTypeRef ~> T } } else if (memberName!==null) { val staticAccess = (targetTypeRef instanceof TypeTypeRef) val checkVisibility = false val scope = memberScopingHelper.createMemberScope(targetTypeRef, expr, checkVisibility, staticAccess) val memberDesc = if(memberName!==null && !memberName.isEmpty()) { scope.getSingleElement(qualifiedNameConverter.toQualifiedName(memberName)) }; val member = if(memberDesc!==null && !IEObjectDescriptionWithError.isErrorDescription(memberDesc)) { memberDesc.getEObjectOrProxy() }; if(member instanceof TMember && !member.eIsProxy) { G |- (member as TMember) : var TypeRef memberTypeRef val G2 = G.wrap typeSystemHelper.addSubstitutions(G2,targetTypeRef) G2.addThisType(targetTypeRef) G2 |- memberTypeRef ~> T } else if (targetTypeRef.dynamic) { T = G.anyTypeRefDynamic } else { T = TypeRefsFactory.eINSTANCE.createUnknownTypeRef } } else if (targetTypeRef.dynamic) { T = G.anyTypeRefDynamic } else { T = G.anyTypeRef } } */
    {
        RuleFailedException previousFailure = null;
        try {
            /* expr.target === null || expr.index === null */
            if (!((expr.getTarget() == null) || (expr.getIndex() == null))) {
                sneakyThrowRuleFailedException("expr.target === null || expr.index === null");
            }
            T = TypeRefsFactory.eINSTANCE.createUnknownTypeRef();
        } catch (Exception e) {
            previousFailure = extractRuleFailedException(e);
            /* { expr.target instanceof SuperLiteral T = TypeRefsFactory.eINSTANCE.createUnknownTypeRef } or { G |- expr.target : var TypeRef targetTypeRef targetTypeRef = typeSystemHelper.resolveType(G, targetTypeRef); G |- expr.index : var TypeRef indexTypeRef; val targetDeclType = targetTypeRef.declaredType; val targetIsLiteralOfStringBasedEnum = targetDeclType instanceof TEnum && AnnotationDefinition.STRING_BASED.hasAnnotation(targetDeclType); val indexIsNumeric = { G |- indexTypeRef <: G.numberTypeRef }; val indexValue = ASTMetaInfoUtils.getCompileTimeValue(expr.index); val memberName = N4JSLanguageUtils.derivePropertyNameFromCompileTimeValue(indexValue); if (indexIsNumeric && (targetTypeRef.isArrayLike || targetIsLiteralOfStringBasedEnum)) { if (targetDeclType.generic && targetTypeRef.typeArgs.isEmpty) { T = G.anyTypeRef } else { val G2 = G.wrap typeSystemHelper.addSubstitutions(G2, targetTypeRef) G2.addThisType(targetTypeRef) val elementTypeRef = if(targetIsLiteralOfStringBasedEnum) { G.stringType.elementType } else { targetDeclType.elementType }; G2 |- elementTypeRef ~> T } } else if (memberName!==null) { val staticAccess = (targetTypeRef instanceof TypeTypeRef) val checkVisibility = false val scope = memberScopingHelper.createMemberScope(targetTypeRef, expr, checkVisibility, staticAccess) val memberDesc = if(memberName!==null && !memberName.isEmpty()) { scope.getSingleElement(qualifiedNameConverter.toQualifiedName(memberName)) }; val member = if(memberDesc!==null && !IEObjectDescriptionWithError.isErrorDescription(memberDesc)) { memberDesc.getEObjectOrProxy() }; if(member instanceof TMember && !member.eIsProxy) { G |- (member as TMember) : var TypeRef memberTypeRef val G2 = G.wrap typeSystemHelper.addSubstitutions(G2,targetTypeRef) G2.addThisType(targetTypeRef) G2 |- memberTypeRef ~> T } else if (targetTypeRef.dynamic) { T = G.anyTypeRefDynamic } else { T = TypeRefsFactory.eINSTANCE.createUnknownTypeRef } } else if (targetTypeRef.dynamic) { T = G.anyTypeRefDynamic } else { T = G.anyTypeRef } } */
            {
                try {
                    Expression _target = expr.getTarget();
                    /* expr.target instanceof SuperLiteral */
                    if (!(_target instanceof SuperLiteral)) {
                        sneakyThrowRuleFailedException("expr.target instanceof SuperLiteral");
                    }
                    T = TypeRefsFactory.eINSTANCE.createUnknownTypeRef();
                } catch (Exception e_1) {
                    previousFailure = extractRuleFailedException(e_1);
                    /* G |- expr.target : var TypeRef targetTypeRef */
                    Expression _target_1 = expr.getTarget();
                    TypeRef targetTypeRef = null;
                    Result<TypeRef> result = typeInternal(G, _trace_, _target_1);
                    checkAssignableTo(result.getFirst(), TypeRef.class);
                    targetTypeRef = (TypeRef) result.getFirst();
                    targetTypeRef = this.typeSystemHelper.resolveType(G, targetTypeRef);
                    /* G |- expr.index : var TypeRef indexTypeRef */
                    Expression _index = expr.getIndex();
                    TypeRef indexTypeRef = null;
                    Result<TypeRef> result_1 = typeInternal(G, _trace_, _index);
                    checkAssignableTo(result_1.getFirst(), TypeRef.class);
                    indexTypeRef = (TypeRef) result_1.getFirst();
                    final Type targetDeclType = targetTypeRef.getDeclaredType();
                    final boolean targetIsLiteralOfStringBasedEnum = ((targetDeclType instanceof TEnum) && AnnotationDefinition.STRING_BASED.hasAnnotation(targetDeclType));
                    /* G |- indexTypeRef <: G.numberTypeRef */
                    ParameterizedTypeRef _numberTypeRef = RuleEnvironmentExtensions.numberTypeRef(G);
                    boolean _ruleinvocation = subtypeSucceeded(G, _trace_, indexTypeRef, _numberTypeRef);
                    final boolean indexIsNumeric = _ruleinvocation;
                    final CompileTimeValue indexValue = ASTMetaInfoUtils.getCompileTimeValue(expr.getIndex());
                    final String memberName = N4JSLanguageUtils.derivePropertyNameFromCompileTimeValue(indexValue);
                    if ((indexIsNumeric && (targetTypeRef.isArrayLike() || targetIsLiteralOfStringBasedEnum))) {
                        if ((targetDeclType.isGeneric() && targetTypeRef.getTypeArgs().isEmpty())) {
                            T = RuleEnvironmentExtensions.anyTypeRef(G);
                        } else {
                            final RuleEnvironment G2 = RuleEnvironmentExtensions.wrap(G);
                            this.typeSystemHelper.addSubstitutions(G2, targetTypeRef);
                            RuleEnvironmentExtensions.addThisType(G2, targetTypeRef);
                            TypeRef _xifexpression = null;
                            if (targetIsLiteralOfStringBasedEnum) {
                                _xifexpression = RuleEnvironmentExtensions.stringType(G).getElementType();
                            } else {
                                _xifexpression = targetDeclType.getElementType();
                            }
                            final TypeRef elementTypeRef = _xifexpression;
                            /* G2 |- elementTypeRef ~> T */
                            Result<TypeArgument> result_2 = substTypeVariablesInternal(G2, _trace_, elementTypeRef);
                            checkAssignableTo(result_2.getFirst(), TypeRef.class);
                            T = (TypeRef) result_2.getFirst();
                        }
                    } else {
                        if ((memberName != null)) {
                            final boolean staticAccess = (targetTypeRef instanceof TypeTypeRef);
                            final boolean checkVisibility = false;
                            final IScope scope = this.memberScopingHelper.createMemberScope(targetTypeRef, expr, checkVisibility, staticAccess);
                            IEObjectDescription _xifexpression_1 = null;
                            if (((memberName != null) && (!memberName.isEmpty()))) {
                                _xifexpression_1 = scope.getSingleElement(this.qualifiedNameConverter.toQualifiedName(memberName));
                            }
                            final IEObjectDescription memberDesc = _xifexpression_1;
                            EObject _xifexpression_2 = null;
                            if (((memberDesc != null) && (!IEObjectDescriptionWithError.isErrorDescription(memberDesc)))) {
                                _xifexpression_2 = memberDesc.getEObjectOrProxy();
                            }
                            final EObject member = _xifexpression_2;
                            if (((member instanceof TMember) && (!member.eIsProxy()))) {
                                /* G |- (member as TMember) : var TypeRef memberTypeRef */
                                TypeRef memberTypeRef = null;
                                Result<TypeRef> result_3 = typeInternal(G, _trace_, ((TMember) member));
                                checkAssignableTo(result_3.getFirst(), TypeRef.class);
                                memberTypeRef = (TypeRef) result_3.getFirst();
                                final RuleEnvironment G2_1 = RuleEnvironmentExtensions.wrap(G);
                                this.typeSystemHelper.addSubstitutions(G2_1, targetTypeRef);
                                RuleEnvironmentExtensions.addThisType(G2_1, targetTypeRef);
                                /* G2 |- memberTypeRef ~> T */
                                Result<TypeArgument> result_4 = substTypeVariablesInternal(G2_1, _trace_, memberTypeRef);
                                checkAssignableTo(result_4.getFirst(), TypeRef.class);
                                T = (TypeRef) result_4.getFirst();
                            } else {
                                boolean _isDynamic = targetTypeRef.isDynamic();
                                if (_isDynamic) {
                                    T = RuleEnvironmentExtensions.anyTypeRefDynamic(G);
                                } else {
                                    T = TypeRefsFactory.eINSTANCE.createUnknownTypeRef();
                                }
                            }
                        } else {
                            boolean _isDynamic_1 = targetTypeRef.isDynamic();
                            if (_isDynamic_1) {
                                T = RuleEnvironmentExtensions.anyTypeRefDynamic(G);
                            } else {
                                T = RuleEnvironmentExtensions.anyTypeRef(G);
                            }
                        }
                    }
                }
            }
        }
    }
    return new Result<TypeRef>(T);
}

Example 23 with RuleEnvironment

use of org.eclipse.xsemantics.runtime.RuleEnvironment in project n4js by eclipse.

the class BoundSet method substituteInferenceVariable.

/**
 * Returns a copy of {@code typeRef} in which {@code infVar} is substituted by {@code typeArg} or {@code typeRef}
 * itself if no change has occurred.
 *
 * @return typeRef[infVar:=typeArg]
 */
private TypeRef substituteInferenceVariable(TypeRef typeRef, InferenceVariable infVar, TypeArgument typeArg) {
    final RuleEnvironment Gtemp = RuleEnvironmentExtensions.wrap(this.G);
    RuleEnvironmentExtensions.addTypeMapping(Gtemp, infVar, typeArg);
    final TypeRef result = (TypeRef) this.ts.substTypeVariables(Gtemp, typeRef).getValue();
    // assert !(TypeVarUtils.occursIn(infVar, result));
    return result;
}

Example 24 with RuleEnvironment

use of org.eclipse.xsemantics.runtime.RuleEnvironment in project n4js by eclipse.

the class InferenceContext method newInferenceVariablesFor.

/**
 * Introduces newly generated inference variables for each type parameter of the given function type (if generic)
 * and returns a non-generic function type in which all type variables owned by the given function type are replaced
 * by those inference variables; simply returns the given function type unchanged if it already is non-generic.
 * Returns given function type unchanged in case of error (so returned function type may actually be generic, but
 * only in error cases).
 * <p>
 * Example: given a function type such as
 *
 * <pre>
 * {function&lt;T,S>(G&lt;T,string>):S}
 * </pre>
 *
 * this method will add two new type variables α', β' and return
 *
 * <pre>
 * {function(G&lt;α',string>):β'}
 * </pre>
 *
 * Note that the returned function type is non-generic.
 */
public FunctionTypeExprOrRef newInferenceVariablesFor(FunctionTypeExprOrRef funTypeRef) {
    if (!funTypeRef.isGeneric())
        return funTypeRef;
    // NOTE: typeParam may contain null entries!
    final List<TypeVariable> typeParams = funTypeRef.getTypeVars();
    final InferenceVariable[] newInfVars = newInferenceVariables(typeParams.size(), true);
    final List<? extends TypeRef> newInfVarsRefs = Stream.of(newInfVars).map(TypeUtils::createTypeRef).collect(Collectors.toList());
    // new, empty RE
    final RuleEnvironment G_params2infVars = RuleEnvironmentExtensions.newRuleEnvironment(G);
    RuleEnvironmentExtensions.addTypeMappings(G_params2infVars, typeParams, newInfVarsRefs);
    final TypeArgument left_withInfVars = ts.substTypeVariables(G_params2infVars, funTypeRef).getValue();
    if (left_withInfVars instanceof FunctionTypeExprOrRef)
        return (FunctionTypeExprOrRef) left_withInfVars;
    // in case of substitution error: return original funTypeRef
    return funTypeRef;
}

Example 25 with RuleEnvironment

use of org.eclipse.xsemantics.runtime.RuleEnvironment in project n4js by eclipse.

the class Reducer method mightBeSubtypeOf.

private boolean mightBeSubtypeOf(FunctionTypeExprOrRef left, FunctionTypeExprOrRef right) {
    // step 1: replace all inference variables by UnknownTypeRef
    final TypeRef unknown = TypeRefsFactory.eINSTANCE.createUnknownTypeRef();
    final RuleEnvironment G_temp = RuleEnvironmentExtensions.newRuleEnvironment(G);
    for (InferenceVariable iv : ic.getInferenceVariables()) {
        RuleEnvironmentExtensions.addTypeMapping(G_temp, iv, unknown);
    }
    final TypeArgument leftSubst = ts.substTypeVariables(G_temp, left).getValue();
    final TypeArgument rightSubst = ts.substTypeVariables(G_temp, right).getValue();
    // step 2: now, perform subtype check reusing existing logic
    return ts.subtypeSucceeded(G, leftSubst, rightSubst);
}