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

Example 1 with ClassOrInterface

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

the class AbstractTransformer method canOptimiseReifiedTypeTest.

/**
 * Determine whether we can use a plain {@code instanceof} instead of
 * a full {@code Util.isReified()} for a {@code is} test
 */
private boolean canOptimiseReifiedTypeTest(Type type) {
    if (isJavaArray(type)) {
        if (isJavaObjectArray(type)) {
            MultidimensionalArray multiArray = getMultiDimensionalArrayInfo(type);
            // we can test, even if not fully reified in Java
            return multiArray.type.getDeclaration() instanceof ClassOrInterface;
        } else {
            // primitive array we can test
            return true;
        }
    }
    // we can optimise it if we've got a ClassOrInterface with only Anything type parameters
    TypeDeclaration typeDeclaration = type.getDeclaration();
    if (typeDeclaration instanceof ClassOrInterface == false)
        return false;
    for (Entry<TypeParameter, Type> entry : type.getTypeArguments().entrySet()) {
        TypeParameter tp = entry.getKey();
        // skip type params for qualifying types
        if (!tp.getDeclaration().equals(typeDeclaration))
            continue;
        if (!type.isCovariant(tp)) {
            return false;
        }
        java.util.List<Type> bounds = tp.getSatisfiedTypes();
        Type ta = entry.getValue();
        if ((bounds == null || bounds.isEmpty()) && !isAnything(ta)) {
            return false;
        }
        for (Type bound : bounds) {
            if (!ta.isSupertypeOf(bound)) {
                return false;
            }
        }
    }
    // they're all Anything (or supertypes of their upper bound) we can optimise, unless we have a container with type arguments
    Type qualifyingType = type.getQualifyingType();
    if (qualifyingType == null && // ignore qualifying types of static java declarations
    (ModelUtil.isCeylonDeclaration(type.getDeclaration()) || !type.getDeclaration().isStatic())) {
        Declaration declaration = type.getDeclaration();
        do {
            // it may be contained in a function or value, and we want its type
            Declaration enclosingDeclaration = getDeclarationContainer(declaration);
            if (enclosingDeclaration instanceof TypedDeclaration) {
                // must be in scope
                if (enclosingDeclaration.isParameterized())
                    return false;
                // look up the containers
                declaration = enclosingDeclaration;
            } else if (enclosingDeclaration instanceof TypeDeclaration) {
                // we can't optimise if that container has type arguments as they are not provided
                if (enclosingDeclaration.isParameterized())
                    return false;
                // look up the containers
                declaration = enclosingDeclaration;
            } else {
                // that's fucked up
                break;
            }
        // go up every containing typed declaration
        } while (declaration != null);
        // we can optimise!
        return true;
    } else if (qualifyingType != null) {
        // we can only optimise if the qualifying type can also be optimised
        return canOptimiseReifiedTypeTest(qualifyingType);
    } else {
        // we can optimise!
        return true;
    }
}

Example 2 with ClassOrInterface

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

the class AbstractTransformer method getFirstRefinedDeclaration.

private TypedDeclaration getFirstRefinedDeclaration(TypedDeclaration decl) {
    if (decl.getContainer() instanceof ClassOrInterface == false)
        return decl;
    java.util.List<Type> signature = org.eclipse.ceylon.model.typechecker.model.ModelUtil.getSignature(decl);
    boolean variadic = org.eclipse.ceylon.model.typechecker.model.ModelUtil.isVariadic(decl);
    boolean overloaded = decl.isOverloaded() || decl.isAbstraction();
    Declaration refinedDeclaration = decl.getRefinedDeclaration();
    if (refinedDeclaration != null) {
        overloaded |= refinedDeclaration.isOverloaded() || refinedDeclaration.isAbstraction();
    }
    ClassOrInterface container = (ClassOrInterface) decl.getContainer();
    HashSet<TypeDeclaration> visited = new HashSet<TypeDeclaration>();
    // start looking for it, but skip this type, only lookup upwards of it
    TypedDeclaration firstRefinedDeclaration = getFirstRefinedDeclaration(container, decl, signature, variadic, visited, true, overloaded);
    // only keep the first refined decl if its type can be trusted: if it is not itself widening
    if (firstRefinedDeclaration != null) {
        if (CodegenUtil.hasUntrustedType(firstRefinedDeclaration))
            firstRefinedDeclaration = getFirstRefinedDeclaration(firstRefinedDeclaration);
    }
    return firstRefinedDeclaration != null ? firstRefinedDeclaration : decl;
}

Example 3 with ClassOrInterface

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

the class AbstractTransformer method canUseFastFailTypeTest.

private boolean canUseFastFailTypeTest(Type type) {
    if (type.getDeclaration() instanceof ClassOrInterface == false)
        return false;
    boolean isRaw = type.getDeclaration().isParameterized();
    Type qualifyingType = type.getQualifyingType();
    if (qualifyingType == null && // ignore qualifying types of static java declarations
    (ModelUtil.isCeylonDeclaration(type.getDeclaration()) || !type.getDeclaration().isStatic())) {
        Declaration declaration = type.getDeclaration();
        boolean local = false;
        do {
            // getDeclarationContainer will skip some containers we don't want to consider, so it's not good
            // for checking locality, rely on isLocal for that.
            local |= Decl.isLocal(declaration);
            // it may be contained in a function or value, and we want its type
            Declaration enclosingDeclaration = getDeclarationContainer(declaration);
            if (enclosingDeclaration instanceof TypedDeclaration) {
                local = true;
                // look up the containers
                declaration = enclosingDeclaration;
            } else if (enclosingDeclaration instanceof TypeDeclaration) {
                // contain type parameters, unless the local is raw
                if (enclosingDeclaration.isParameterized() && local && !isRaw)
                    return false;
                // look up the containers
                declaration = enclosingDeclaration;
            } else {
                // that's fucked up
                break;
            }
        // go up every containing typed declaration
        } while (declaration != null);
        // we can fast-fail!
        return true;
    } else if (qualifyingType != null) {
        // we can only fast-fail if the qualifying type can also be fast-failed
        return canUseFastFailTypeTest(qualifyingType);
    } else {
        // we can fast-fail!
        return true;
    }
}

Example 4 with ClassOrInterface

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

the class AbstractTransformer method supportsReified.

public static boolean supportsReified(Declaration declaration) {
    if (declaration instanceof ClassOrInterface) {
        // Java constructors don't support reified type arguments
        return ModelUtil.isCeylonDeclaration((TypeDeclaration) declaration);
    } else if (Decl.isConstructor(declaration)) {
        // Java constructors don't support reified type arguments
        return ModelUtil.isCeylonDeclaration(ModelUtil.getConstructor(declaration));
    } else if (declaration instanceof Function) {
        if (((Function) declaration).isParameter()) {
            // those can never be parameterised
            return false;
        }
        if (declaration.isToplevel())
            return true;
        // Java methods don't support reified type arguments
        Function m = (Function) CodegenUtil.getTopmostRefinedDeclaration(declaration);
        // See what its container is
        ClassOrInterface container = ModelUtil.getClassOrInterfaceContainer(m);
        // that must be Ceylon so it supports it
        if (container == null)
            return true;
        return supportsReified(container);
    } else {
        throw BugException.unhandledDeclarationCase(declaration);
    }
}

Example 5 with ClassOrInterface

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

the class AbstractTransformer method collectQualifyingTypeArguments.

/**
 * Collects all the type parameters and arguments required for an interface that's been pulled up to the
 * toplevel, including its containing type and method type parameters.
 */
private void collectQualifyingTypeArguments(java.util.List<TypeParameter> qualifyingTypeParameters, Map<TypeParameter, Type> qualifyingTypeArguments, java.util.List<Reference> qualifyingTypes) {
    // make sure we only add type parameters with the same name once, as duplicates are erased from the target interface
    // since they cannot be accessed
    Set<String> names = new HashSet<String>();
    // walk the qualifying types backwards to make sure we only add a TP with the same name once and the outer one wins
    for (int i = qualifyingTypes.size() - 1; i >= 0; i--) {
        Reference qualifiedType = qualifyingTypes.get(i);
        Map<TypeParameter, Type> tas = qualifiedType.getTypeArguments();
        java.util.List<TypeParameter> tps = qualifiedType.getDeclaration().getTypeParameters();
        // add any type params for this type
        if (tps != null) {
            int index = 0;
            for (TypeParameter tp : tps) {
                // add it only once
                if (names.add(tp.getName())) {
                    // start putting all these type parameters at 0 and then in order
                    // so that outer type params end up before inner type params but
                    // order is preserved within each type
                    qualifyingTypeParameters.add(index++, tp);
                    qualifyingTypeArguments.put(tp, tas.get(tp));
                }
            }
        }
        // add any container method TP
        Declaration declaration = qualifiedType.getDeclaration();
        if (Decl.isLocal(declaration)) {
            Scope scope = declaration.getContainer();
            // collect every container method until the next type or package
            java.util.List<Function> methods = new LinkedList<Function>();
            while (scope != null && scope instanceof ClassOrInterface == false && scope instanceof Package == false) {
                if (scope instanceof Function) {
                    methods.add((Function) scope);
                }
                scope = scope.getContainer();
            }
            // methods are sorted inner to outer, which is the order we're following here for types
            for (Function method : methods) {
                java.util.List<TypeParameter> methodTypeParameters = method.getTypeParameters();
                if (methodTypeParameters != null) {
                    int index = 0;
                    for (TypeParameter tp : methodTypeParameters) {
                        // add it only once
                        if (names.add(tp.getName())) {
                            // start putting all these type parameters at 0 and then in order
                            // so that outer type params end up before inner type params but
                            // order is preserved within each type
                            qualifyingTypeParameters.add(index++, tp);
                            qualifyingTypeArguments.put(tp, tp.getType());
                        }
                    }
                }
            }
        }
    }
}