Examples with TypeParameter org.eclipse.ceylon.model.typechecker.model.TypeParameter used on opensource projects

Example 6 with TypeParameter

use of org.eclipse.ceylon.model.typechecker.model.TypeParameter in project ceylon by eclipse.

the class AbstractTransformer method nonWideningTypeDecl.

TypedReference nonWideningTypeDecl(TypedReference typedReference, Type currentType) {
    TypedReference refinedTypedReference = getRefinedDeclaration(typedReference, currentType);
    if (refinedTypedReference != null) {
        /*
             * We are widening if the type:
             * - is not object
             * - is erased to object
             * - refines a declaration that is not erased to object
             */
        Type declType = typedReference.getType();
        Type refinedDeclType = refinedTypedReference.getType();
        if (declType == null || refinedDeclType == null)
            return typedReference;
        boolean isWidening = isWidening(declType, refinedDeclType);
        if (!isWidening) {
            // make sure we get the instantiated refined decl
            if (refinedDeclType.getDeclaration() instanceof TypeParameter && !(declType.getDeclaration() instanceof TypeParameter))
                refinedDeclType = nonWideningType(typedReference, refinedTypedReference);
            if (!typedReference.getTypeArguments().containsKey(simplifyType(refinedDeclType).getDeclaration())) {
                isWidening = isWideningTypeArguments(declType, refinedDeclType, true);
            }
        }
        if (isWidening)
            return refinedTypedReference;
    }
    return typedReference;
}

Example 7 with TypeParameter

use of org.eclipse.ceylon.model.typechecker.model.TypeParameter in project ceylon by eclipse.

the class AbstractTransformer method makeReifiedTypeArgumentResolved.

private JCExpression makeReifiedTypeArgumentResolved(Type pt, boolean qualified, TypeArgumentAccessor typeArgumentAccessor, boolean wantsRaw) {
    if (pt.isUnion()) {
        // FIXME: refactor this shite
        List<JCExpression> typeTestArguments = List.nil();
        java.util.List<Type> typeParameters = pt.getCaseTypes();
        if (typeParameters.size() == 2) {
            Type alternative = null;
            if (typeParameters.get(0).isEmpty())
                alternative = typeParameters.get(1);
            else if (typeParameters.get(1).isEmpty())
                alternative = typeParameters.get(0);
            if (alternative != null && alternative.isTuple()) {
                JCExpression tupleType = makeTupleTypeDescriptor(alternative, true);
                if (tupleType != null)
                    return tupleType;
            }
        }
        for (int i = typeParameters.size() - 1; i >= 0; i--) {
            typeTestArguments = typeTestArguments.prepend(makeReifiedTypeArgument(typeParameters.get(i)));
        }
        return make().Apply(null, makeSelect(makeTypeDescriptorType(), "union"), typeTestArguments);
    } else if (pt.isIntersection()) {
        List<JCExpression> typeTestArguments = List.nil();
        java.util.List<Type> typeParameters = pt.getSatisfiedTypes();
        for (int i = typeParameters.size() - 1; i >= 0; i--) {
            typeTestArguments = typeTestArguments.prepend(makeReifiedTypeArgument(typeParameters.get(i)));
        }
        return make().Apply(null, makeSelect(makeTypeDescriptorType(), "intersection"), typeTestArguments);
    } else if (pt.isNothing()) {
        return makeNothingTypeDescriptor();
    }
    TypeDeclaration declaration = pt.getDeclaration();
    if (declaration instanceof Constructor) {
        pt = pt.getExtendedType();
        declaration = pt.getDeclaration();
    }
    if (pt.isClassOrInterface()) {
        // see if we have an alias for it
        if (supportsReifiedAlias((ClassOrInterface) declaration)) {
            JCExpression qualifier = naming.makeDeclarationName(declaration, DeclNameFlag.QUALIFIED);
            return makeSelect(qualifier, naming.getTypeDescriptorAliasName());
        }
        if (pt.isTuple()) {
            JCExpression tupleType = makeTupleTypeDescriptor(pt, false);
            if (tupleType != null)
                return tupleType;
        }
        // no alias, must build it
        List<JCExpression> typeTestArguments;
        JCExpression thisType = makeUnerasedClassLiteral(declaration);
        if (!wantsRaw) {
            typeTestArguments = makeReifiedTypeArgumentsResolved(pt.getTypeArgumentList(), qualified, typeArgumentAccessor);
            // do we have variance overrides?
            Map<TypeParameter, SiteVariance> varianceOverrides = pt.getVarianceOverrides();
            if (!varianceOverrides.isEmpty()) {
                // we need to pass them as second argument then, in an array
                ListBuffer<JCExpression> varianceElements = new ListBuffer<JCExpression>();
                for (TypeParameter typeParameter : declaration.getTypeParameters()) {
                    SiteVariance useSiteVariance = varianceOverrides.get(typeParameter);
                    String selector;
                    if (useSiteVariance != null) {
                        switch(useSiteVariance) {
                            case IN:
                                selector = "IN";
                                break;
                            case OUT:
                                selector = "OUT";
                                break;
                            default:
                                selector = "NONE";
                                break;
                        }
                    } else {
                        selector = "NONE";
                    }
                    JCExpression varianceElement = make().Select(makeIdent(syms().ceylonVarianceType), names().fromString(selector));
                    varianceElements.append(varianceElement);
                }
                JCNewArray varianceArray = make().NewArray(makeIdent(syms().ceylonVarianceType), List.<JCExpression>nil(), varianceElements.toList());
                typeTestArguments = typeTestArguments.prepend(varianceArray);
            }
        } else {
            typeTestArguments = List.nil();
        }
        typeTestArguments = typeTestArguments.prepend(thisType);
        JCExpression classDescriptor = make().Apply(null, makeSelect(makeTypeDescriptorType(), "klass"), typeTestArguments);
        Type qualifyingType = pt.getQualifyingType();
        JCExpression containerType = null;
        if (qualifyingType == null) {
            // it may be contained in a function or value, and we want its type
            // or static class members may have no qualifying type but we want the TDs to treat
            // them as members anyway
            Declaration enclosingDeclaration = getDeclarationContainer(declaration);
            if (enclosingDeclaration instanceof TypedDeclaration)
                containerType = makeTypedDeclarationTypeDescriptorResolved((TypedDeclaration) enclosingDeclaration, typeArgumentAccessor);
            else if (enclosingDeclaration instanceof TypeDeclaration) {
                qualifyingType = ((TypeDeclaration) enclosingDeclaration).getType();
            }
        }
        if (qualifyingType != null && qualifyingType.isConstructor()) {
            qualifyingType = qualifyingType.getQualifyingType();
        }
        if (qualifyingType != null) {
            if (declaration.isStatic() && supportsReified(declaration)) {
                // There is no outer instance with a $reified$T field
                final Type t = pt;
                containerType = makeReifiedTypeArgumentResolved(qualifyingType, true, new TypeArgumentAccessor() {

                    public JCExpression getTypeDescriptor(TypeParameter tp, boolean qualified) {
                        return makeSelect(naming.makeQualifiedThis(makeJavaType(t, JT_RAW)), naming.getTypeArgumentDescriptorName(tp));
                    }
                }, false);
            } else {
                containerType = makeReifiedTypeArgumentResolved(qualifyingType, true, typeArgumentAccessor, // we want raw containers, since we can't capture their TPs
                declaration.isStatic());
            }
        }
        if (containerType == null) {
            return classDescriptor;
        } else {
            return make().Apply(null, makeSelect(makeTypeDescriptorType(), "member"), List.of(containerType, classDescriptor));
        }
    } else if (pt.isTypeParameter()) {
        return typeArgumentAccessor.getTypeDescriptor((TypeParameter) declaration, qualified);
    } else {
        throw BugException.unhandledDeclarationCase(declaration);
    }
}

Example 8 with TypeParameter

use of org.eclipse.ceylon.model.typechecker.model.TypeParameter in project ceylon by eclipse.

the class AbstractTransformer method makeTypeArgs.

private ListBuffer<JCExpression> makeTypeArgs(Type simpleType, int flags) {
    Map<TypeParameter, Type> tas = simpleType.getTypeArguments();
    java.util.List<TypeParameter> tps = Strategy.getEffectiveTypeParameters(simpleType.getDeclaration());
    if (tps.size() != tas.size()) {
        tas = new HashMap<TypeParameter, Type>(tas);
        for (TypeParameter tp : tps) {
            if (tas.get(tp) == null) {
                Type pt = simpleType.getQualifyingType();
                while (pt != null) {
                    Type ta = pt.getTypeArguments().get(tp);
                    if (ta != null) {
                        tas.put(tp, ta);
                        break;
                    }
                    pt = pt.getQualifyingType();
                }
            }
        }
    }
    return makeTypeArgs(isCeylonCallable(simpleType), flags, tas, tps, simpleType);
}

Example 9 with TypeParameter

use of org.eclipse.ceylon.model.typechecker.model.TypeParameter in project ceylon by eclipse.

the class AbstractTransformer method declarationAppearsInInvariantPosition.

private boolean declarationAppearsInInvariantPosition(TypeDeclaration declaration, Type type) {
    if (type.isUnion()) {
        for (Type pt : type.getCaseTypes()) {
            if (declarationAppearsInInvariantPosition(declaration, pt))
                return true;
        }
        return false;
    }
    if (type.isIntersection()) {
        for (Type pt : type.getSatisfiedTypes()) {
            if (declarationAppearsInInvariantPosition(declaration, pt))
                return true;
        }
        return false;
    }
    if (type.isClassOrInterface()) {
        TypeDeclaration typeDeclaration = type.getDeclaration();
        java.util.List<TypeParameter> typeParameters = typeDeclaration.getTypeParameters();
        Map<TypeParameter, Type> typeArguments = type.getTypeArguments();
        for (TypeParameter tp : typeParameters) {
            Type typeArgument = typeArguments.get(tp);
            if (tp.isInvariant() || hasDependentTypeParameters(typeParameters, tp)) {
                if (Decl.equal(typeArgument.getDeclaration(), declaration)) {
                    return true;
                }
            }
            if (declarationAppearsInInvariantPosition(declaration, typeArgument))
                return true;
        }
    }
    return false;
}

Example 10 with TypeParameter

use of org.eclipse.ceylon.model.typechecker.model.TypeParameter in project ceylon by eclipse.

the class AbstractTransformer method getTypedReference.

TypedReference getTypedReference(TypedDeclaration decl) {
    java.util.List<Type> typeArgs = Collections.<Type>emptyList();
    if (decl instanceof Function) {
        // For methods create type arguments for any type parameters it might have
        Function m = (Function) decl;
        if (!m.getTypeParameters().isEmpty()) {
            typeArgs = new ArrayList<Type>(m.getTypeParameters().size());
            for (TypeParameter p : m.getTypeParameters()) {
                Type pt = p.getType();
                typeArgs.add(pt);
            }
        }
    }
    if (decl.getContainer() instanceof TypeDeclaration) {
        TypeDeclaration containerDecl = (TypeDeclaration) decl.getContainer();
        return containerDecl.getType().getTypedMember(decl, typeArgs);
    }
    return decl.appliedTypedReference(null, typeArgs);
}