Examples with Type com.redhat.ceylon.model.typechecker.model.Type used on opensource projects

Example 16 with Type

use of com.redhat.ceylon.model.typechecker.model.Type in project ceylon-compiler by ceylon.

the class ExpressionTransformer method transformMemberExpression.

private JCExpression transformMemberExpression(Tree.StaticMemberOrTypeExpression expr, JCExpression primaryExpr, TermTransformer transformer) {
    JCExpression result = null;
    // do not throw, an error will already have been reported
    Declaration decl = expr.getDeclaration();
    if (decl == null) {
        return makeErroneous(expr, "compiler bug: expression with no declaration");
    }
    // creating a tmp variable (in which case we have a substitution for it)
    while (decl instanceof TypedDeclaration) {
        TypedDeclaration typedDecl = (TypedDeclaration) decl;
        if (!naming.isSubstituted(decl) && typedDecl.getOriginalDeclaration() != null) {
            decl = ((TypedDeclaration) decl).getOriginalDeclaration();
        } else {
            break;
        }
    }
    // (the header might look like a field while the implementation is a getter)
    if (decl.isNativeHeader()) {
        Declaration d = ModelUtil.getNativeDeclaration(decl, Backend.Java);
        if (d != null) {
            decl = d;
        }
    }
    // Explanation: primaryExpr and qualExpr both specify what is to come before the selector
    // but the important difference is that primaryExpr is used for those situations where
    // the result comes from the actual Ceylon code while qualExpr is used for those situations
    // where we need to refer to synthetic objects (like wrapper classes for toplevel methods)
    JCExpression qualExpr = null;
    String selector = null;
    // true for Java interop using fields, and for super constructor parameters, which must use
    // parameters rather than getter methods
    boolean mustUseField = false;
    // true for default parameter methods
    boolean mustUseParameter = false;
    if (decl instanceof Functional && (!(decl instanceof Class) || ((Class) decl).getParameterList() != null) && (!(decl instanceof Function) || !decl.isParameter() || functionalParameterRequiresCallable((Function) decl, expr)) && isFunctionalResult(expr.getTypeModel())) {
        result = transformFunctional(expr, (Functional) decl);
    } else if (Decl.isGetter(decl)) {
        // invoke the getter
        if (decl.isToplevel()) {
            primaryExpr = null;
            qualExpr = naming.makeName((Value) decl, Naming.NA_FQ | Naming.NA_WRAPPER | Naming.NA_MEMBER);
            selector = null;
        } else if (Decl.withinClassOrInterface(decl) && !Decl.isLocalToInitializer(decl)) {
            selector = naming.selector((Value) decl);
        } else {
            // method local attr
            if (!isRecursiveReference(expr)) {
                primaryExpr = naming.makeQualifiedName(primaryExpr, (Value) decl, Naming.NA_Q_LOCAL_INSTANCE);
            }
            selector = naming.selector((Value) decl);
        }
    } else if (Decl.isValueOrSharedOrCapturedParam(decl)) {
        if (decl.isToplevel()) {
            // ERASURE
            if (isNullValue(decl)) {
                result = makeNull();
            } else if (isBooleanTrue(decl)) {
                result = makeBoolean(true);
            } else if (isBooleanFalse(decl)) {
                result = makeBoolean(false);
            } else {
                // it's a toplevel attribute
                primaryExpr = naming.makeName((TypedDeclaration) decl, Naming.NA_FQ | Naming.NA_WRAPPER);
                selector = naming.selector((TypedDeclaration) decl);
            }
        } else if (Decl.isClassAttribute(decl) || Decl.isClassParameter(decl)) {
            mustUseField = Decl.isJavaField(decl) || (isWithinSuperInvocation() && primaryExpr == null && withinSuperInvocation == decl.getContainer());
            mustUseParameter = (primaryExpr == null && isWithinDefaultParameterExpression(decl.getContainer()));
            if (mustUseField || mustUseParameter) {
                if (decl instanceof FieldValue) {
                    selector = ((FieldValue) decl).getRealName();
                } else if (isWithinSuperInvocation() && ((Value) decl).isVariable() && ((Value) decl).isCaptured()) {
                    selector = Naming.getAliasedParameterName(((Value) decl).getInitializerParameter());
                } else {
                    selector = decl.getName();
                }
            } else {
                // invoke the getter, using the Java interop form of Util.getGetterName because this is the only case
                // (Value inside a Class) where we might refer to JavaBean properties
                selector = naming.selector((TypedDeclaration) decl);
            }
        } else if (decl.isCaptured() || decl.isShared()) {
            TypedDeclaration typedDecl = ((TypedDeclaration) decl);
            TypeDeclaration typeDecl = typedDecl.getType().getDeclaration();
            mustUseField = Decl.isBoxedVariable((TypedDeclaration) decl);
            if (Decl.isLocalNotInitializer(typeDecl) && typeDecl.isAnonymous() && // we need the box if it's a captured object
            !typedDecl.isSelfCaptured()) {
            // accessing a local 'object' declaration, so don't need a getter 
            } else if (decl.isCaptured() && !((TypedDeclaration) decl).isVariable() && // captured objects are never variable but need the box
            !typedDecl.isSelfCaptured()) {
            // accessing a local that is not getter wrapped
            } else {
                primaryExpr = naming.makeQualifiedName(primaryExpr, (TypedDeclaration) decl, Naming.NA_Q_LOCAL_INSTANCE);
                selector = naming.selector((TypedDeclaration) decl);
            }
        }
    } else if (Decl.isMethodOrSharedOrCapturedParam(decl)) {
        mustUseParameter = (primaryExpr == null && decl.isParameter() && isWithinDefaultParameterExpression(decl.getContainer()));
        if (!decl.isParameter() && (Decl.isLocalNotInitializer(decl) || (Decl.isLocalToInitializer(decl) && ((Function) decl).isDeferred()))) {
            primaryExpr = null;
            int flags = Naming.NA_MEMBER;
            if (!isRecursiveReference(expr)) {
                // Only want to quote the method name 
                // e.g. enum.$enum()
                flags |= Naming.NA_WRAPPER_UNQUOTED;
            } else if (!isReferenceInSameScope(expr)) {
                // always qualify it with this
                flags |= Naming.NA_WRAPPER | Naming.NA_WRAPPER_WITH_THIS;
            }
            qualExpr = naming.makeName((Function) decl, flags);
            selector = null;
        } else if (decl.isToplevel()) {
            primaryExpr = null;
            qualExpr = naming.makeName((Function) decl, Naming.NA_FQ | Naming.NA_WRAPPER | Naming.NA_MEMBER);
            selector = null;
        } else if (!isWithinInvocation()) {
            selector = null;
        } else {
            // not toplevel, not within method, must be a class member
            selector = naming.selector((Function) decl);
        }
    }
    boolean isCtor = decl instanceof Function && ((Function) decl).getTypeDeclaration() instanceof Constructor;
    if (result == null) {
        boolean useGetter = !(decl instanceof Function || isCtor) && !mustUseField && !mustUseParameter;
        if (qualExpr == null && selector == null && !(isCtor)) {
            useGetter = Decl.isClassAttribute(decl) && CodegenUtil.isErasedAttribute(decl.getName());
            if (useGetter) {
                selector = naming.selector((TypedDeclaration) decl);
            } else {
                selector = naming.substitute(decl);
            }
        }
        if (qualExpr == null) {
            qualExpr = primaryExpr;
        }
        // cases
        if (!mustUseParameter) {
            qualExpr = addQualifierForObjectMembersOfInterface(expr, decl, qualExpr);
            qualExpr = addInterfaceImplAccessorIfRequired(qualExpr, expr, decl);
            qualExpr = addThisOrObjectQualifierIfRequired(qualExpr, expr, decl);
            if (qualExpr == null && needDollarThis(expr)) {
                qualExpr = makeQualifiedDollarThis((Tree.BaseMemberExpression) expr);
            }
        }
        if (qualExpr == null && (decl.isStaticallyImportable() || (decl instanceof Value && Decl.isEnumeratedConstructor((Value) decl))) && // and not classes
        decl.getContainer() instanceof TypeDeclaration) {
            qualExpr = naming.makeTypeDeclarationExpression(null, (TypeDeclaration) decl.getContainer(), DeclNameFlag.QUALIFIED);
        }
        if (Decl.isPrivateAccessRequiringUpcast(expr)) {
            qualExpr = makePrivateAccessUpcast(expr, qualExpr);
        }
        if (transformer != null) {
            if (decl instanceof TypedDeclaration && ((TypedDeclaration) decl).getType().isTypeConstructor()) {
                // This is a bit of a hack, but we're "invoking a type constructor" 
                // so recurse to get the applied expression. 
                qualExpr = transformMemberExpression(expr, qualExpr, null);
                selector = null;
            }
            result = transformer.transform(qualExpr, selector);
        } else {
            Tree.Primary qmePrimary = null;
            if (expr instanceof Tree.QualifiedMemberOrTypeExpression) {
                qmePrimary = ((Tree.QualifiedMemberOrTypeExpression) expr).getPrimary();
            }
            boolean safeMemberJavaArray = expr instanceof Tree.QualifiedMemberExpression && ((Tree.QualifiedMemberExpression) expr).getMemberOperator() instanceof Tree.SafeMemberOp && isJavaArray(qmePrimary.getTypeModel());
            if ((safeMemberJavaArray || Decl.isValueTypeDecl(qmePrimary)) && // Safe operators always work on boxed things, so don't use value types
            (safeMemberJavaArray || (expr instanceof Tree.QualifiedMemberOrTypeExpression == false) || ((Tree.QualifiedMemberOrTypeExpression) expr).getMemberOperator() instanceof Tree.MemberOp) && // We never want to use value types on boxed things, unless they are java arrays
            (CodegenUtil.isUnBoxed(qmePrimary) || isJavaArray(qmePrimary.getTypeModel())) && // Java arrays length property does not go via value types
            (!isJavaArray(qmePrimary.getTypeModel()) || (!"length".equals(selector) && !"hashCode".equals(selector)))) {
                JCExpression primTypeExpr = makeJavaType(qmePrimary.getTypeModel(), JT_NO_PRIMITIVES | JT_VALUE_TYPE);
                result = makeQualIdent(primTypeExpr, selector);
                result = make().Apply(List.<JCTree.JCExpression>nil(), result, List.<JCTree.JCExpression>of(qualExpr));
            } else if (expr instanceof Tree.QualifiedMemberOrTypeExpression && isThrowableMessage((Tree.QualifiedMemberOrTypeExpression) expr)) {
                result = utilInvocation().throwableMessage(qualExpr);
            } else if (expr instanceof Tree.QualifiedMemberOrTypeExpression && isThrowableSuppressed((Tree.QualifiedMemberOrTypeExpression) expr)) {
                result = utilInvocation().suppressedExceptions(qualExpr);
            } else {
                result = makeQualIdent(qualExpr, selector);
                if (useGetter) {
                    result = make().Apply(List.<JCTree.JCExpression>nil(), result, List.<JCTree.JCExpression>nil());
                }
            }
        }
    }
    if (transformer == null && decl instanceof TypedDeclaration && ((TypedDeclaration) decl).getType().isTypeConstructor() && !expr.getTypeArguments().getTypeModels().isEmpty()) {
        // applying a type constructor
        ListBuffer<JCExpression> tds = ListBuffer.lb();
        for (Type t : expr.getTypeArguments().getTypeModels()) {
            tds.add(makeReifiedTypeArgument(t));
        }
        result = make().Apply(null, makeQualIdent(result, Naming.Unfix.apply.toString()), List.<JCExpression>of(make().NewArray(make().Type(syms().ceylonTypeDescriptorType), List.<JCExpression>nil(), tds.toList())));
    }
    return result;
}

Example 17 with Type

use of com.redhat.ceylon.model.typechecker.model.Type in project ceylon-compiler by ceylon.

the class ExpressionTransformer method transformQualifiedMemberPrimary.

JCExpression transformQualifiedMemberPrimary(Tree.QualifiedMemberOrTypeExpression expr) {
    if (expr.getTarget() == null)
        return makeErroneous(expr, "compiler bug: " + // make sure we don't die of a missing declaration too
        (expr.getDeclaration() != null ? expr.getDeclaration().getName() : expr) + " has a null target");
    // do not consider the primary to be an invocation since in foo.x() we're invoking x, not foo.
    boolean previousWithinInvocation = withinInvocation(false);
    try {
        // consider package qualifiers as non-prefixed, we always qualify them anyways, this is
        // only useful for the typechecker resolving
        Tree.Primary primary = expr.getPrimary();
        if (Decl.isConstructor(expr.getDeclaration())) {
            Constructor ctor = Decl.getConstructor(expr.getDeclaration());
            if (primary instanceof Tree.QualifiedMemberOrTypeExpression) {
                // foo.Class.Ctor => foo
                primary = ((Tree.QualifiedMemberOrTypeExpression) primary).getPrimary();
            } else if (primary instanceof Tree.BaseMemberExpression) {
            // foo.member.Ctor => foo
            } else if (primary instanceof Tree.BaseTypeExpression) {
                // Class.Ctor => null
                return null;
            }
        }
        if (isPackage(primary))
            return null;
        Type type = expr.getTarget().getQualifyingType();
        if (expr.getMemberOperator() instanceof Tree.SafeMemberOp && !isOptional(type)) {
            Type optionalType = typeFact().getOptionalType(type);
            optionalType.setUnderlyingType(type.getUnderlyingType());
            type = optionalType;
        }
        BoxingStrategy boxing = expr.getMemberOperator() instanceof Tree.SafeMemberOp == false && Decl.isValueTypeDecl(primary) && CodegenUtil.isUnBoxed(primary) ? BoxingStrategy.UNBOXED : BoxingStrategy.BOXED;
        JCExpression result;
        if (isSuper(primary)) {
            result = transformSuper(expr);
        } else if (isSuperOf(primary)) {
            result = transformSuperOf(expr, expr.getPrimary(), expr.getDeclaration().getName());
        } else if (isThis(primary) && !expr.getDeclaration().isCaptured() && !expr.getDeclaration().isShared() && Decl.getDeclarationScope(expr.getScope()) instanceof Constructor) {
            result = null;
        } else if (Decl.isJavaStaticOrInterfacePrimary(primary)) {
            // Java static field or method access
            result = transformJavaStaticOrInterfaceMember((Tree.QualifiedMemberOrTypeExpression) primary, expr.getTypeModel());
        } else {
            result = transformExpression(primary, boxing, type);
        }
        return result;
    } finally {
        withinInvocation(previousWithinInvocation);
    }
}

Example 18 with Type

use of com.redhat.ceylon.model.typechecker.model.Type in project ceylon-compiler by ceylon.

the class ExpressionTransformer method getVarianceCastResult.

private VarianceCastResult getVarianceCastResult(Type expectedType, Type exprType) {
    // exactly the same type, doesn't need casting
    if (expectedType == null || exprType.isExactly(expectedType))
        return null;
    // if we're not trying to put it into an interface, there's no need
    if (!(expectedType.getDeclaration() instanceof Interface))
        return null;
    // the interface must have type arguments, otherwise we can't use raw types
    if (expectedType.getTypeArguments().isEmpty())
        return null;
    // see if any of those type arguments has variance
    boolean hasVariance = false;
    for (TypeParameter t : expectedType.getTypeArguments().keySet()) {
        if (expectedType.isContravariant(t) || expectedType.isCovariant(t)) {
            hasVariance = true;
            break;
        }
    }
    if (!hasVariance)
        return null;
    // see if we're inheriting the interface twice with different type parameters
    java.util.List<Type> satisfiedTypes = new LinkedList<Type>();
    for (Type superType : simplifyType(exprType).getSupertypes()) {
        if (Decl.equal(superType.getDeclaration(), expectedType.getDeclaration()))
            satisfiedTypes.add(superType);
    }
    // discard the supertypes that have the same erasure
    for (int i = 0; i < satisfiedTypes.size(); i++) {
        Type pt = satisfiedTypes.get(i);
        for (int j = i + 1; j < satisfiedTypes.size(); j++) {
            Type other = satisfiedTypes.get(j);
            if (pt.isExactly(other) || haveSameErasure(pt, other)) {
                satisfiedTypes.remove(j);
                break;
            }
        }
    }
    // we need at least two instantiations
    if (satisfiedTypes.size() <= 1)
        return null;
    boolean needsCast = false;
    // we need at least one that differs
    for (Type superType : satisfiedTypes) {
        if (!exprType.isExactly(superType)) {
            needsCast = true;
            break;
        }
    }
    // no cast needed if they are all the same type
    if (!needsCast)
        return null;
    // find the better cast match
    for (Type superType : satisfiedTypes) {
        if (expectedType.isExactly(superType))
            return new VarianceCastResult(superType);
    }
    // nothing better than a raw cast (Stef: not sure that can happen)
    return RawCastVarianceResult;
}

Example 19 with Type

use of com.redhat.ceylon.model.typechecker.model.Type in project ceylon-compiler by ceylon.

the class ExpressionTransformer method transformJavaStaticOrInterfaceMember.

private JCExpression transformJavaStaticOrInterfaceMember(Tree.QualifiedMemberOrTypeExpression qmte, Type staticType) {
    Declaration decl = qmte.getDeclaration();
    if (decl instanceof FieldValue) {
        Value member = (Value) decl;
        return naming.makeName(member, Naming.NA_FQ | Naming.NA_WRAPPER_UNQUOTED);
    } else if (decl instanceof Value) {
        Value member = (Value) decl;
        CallBuilder callBuilder = CallBuilder.instance(this);
        Type qualifyingType = ((TypeDeclaration) member.getContainer()).getType();
        callBuilder.invoke(naming.makeQualifiedName(makeJavaType(qualifyingType, JT_RAW | JT_NO_PRIMITIVES), member, Naming.NA_GETTER | Naming.NA_MEMBER));
        return utilInvocation().checkNull(callBuilder.build());
    } else if (decl instanceof Function) {
        Function method = (Function) decl;
        final ParameterList parameterList = method.getFirstParameterList();
        Type qualifyingType = qmte.getPrimary().getTypeModel();
        Tree.TypeArguments typeArguments = qmte.getTypeArguments();
        Reference producedReference = method.appliedReference(qualifyingType, typeArguments.getTypeModels());
        return utilInvocation().checkNull(makeJavaStaticInvocation(gen(), method, producedReference, parameterList));
    } else if (decl instanceof Class) {
        Class class_ = (Class) decl;
        if (class_.isStaticallyImportable()) {
            return naming.makeTypeDeclarationExpression(null, class_, Naming.DeclNameFlag.QUALIFIED);
        } else {
            final ParameterList parameterList = class_.getFirstParameterList();
            Reference producedReference = qmte.getTarget();
            return utilInvocation().checkNull(makeJavaStaticInvocation(gen(), class_, producedReference, parameterList));
        }
    } else if (decl instanceof Interface) {
        return naming.makeTypeDeclarationExpression(null, (Interface) decl, Naming.DeclNameFlag.QUALIFIED);
    } else {
        return makeErroneous(qmte, "compiler bug: unsupported static");
    }
}

Example 20 with Type

use of com.redhat.ceylon.model.typechecker.model.Type in project ceylon-compiler by ceylon.

the class ExpressionTransformer method transform.

public JCExpression transform(Tree.EntryOp op) {
    // no erasure cast needed for both terms
    JCExpression key = transformExpression(op.getLeftTerm());
    JCExpression elem = transformExpression(op.getRightTerm());
    Type leftType = op.getLeftTerm().getTypeModel();
    Type rightType = op.getRightTerm().getTypeModel();
    Type entryType = typeFact().getEntryType(leftType, rightType);
    JCExpression typeExpr = makeJavaType(entryType, CeylonTransformer.JT_CLASS_NEW);
    return at(op).NewClass(null, null, typeExpr, List.<JCExpression>of(makeReifiedTypeArgument(leftType), makeReifiedTypeArgument(rightType), key, elem), null);
}