Examples with OperatorTranslation com.redhat.ceylon.compiler.java.codegen.Operators.OperatorTranslation used on opensource projects

Example 1 with OperatorTranslation

use of com.redhat.ceylon.compiler.java.codegen.Operators.OperatorTranslation in project ceylon-compiler by ceylon.

the class ExpressionTransformer method transform.

// Postfix operator
public JCExpression transform(Tree.PostfixOperatorExpression expr) {
    OperatorTranslation operator = Operators.getOperator(expr.getClass());
    if (operator == null) {
        return makeErroneous(expr, "compiler bug " + expr.getNodeType() + " is not yet supported");
    }
    OptimisationStrategy optimisationStrategy = operator.getUnOpOptimisationStrategy(expr, expr.getTerm(), this);
    boolean canOptimise = optimisationStrategy.useJavaOperator();
    // only fully optimise if we don't have to access the getter/setter
    if (canOptimise && CodegenUtil.isDirectAccessVariable(expr.getTerm())) {
        JCExpression term = transformExpression(expr.getTerm(), BoxingStrategy.UNBOXED, expr.getTypeModel(), EXPR_WIDEN_PRIM);
        return at(expr).Unary(operator.javacOperator, term);
    }
    Tree.Term term = unwrapExpressionUntilTerm(expr.getTerm());
    Interface compoundType = expr.getUnit().getOrdinalDeclaration();
    Type valueType = getSupertype(expr.getTerm(), compoundType);
    Type returnType = getMostPreciseType(term, getTypeArgument(valueType, 0));
    List<JCVariableDecl> decls = List.nil();
    List<JCStatement> stats = List.nil();
    JCExpression result = null;
    // we can optimise that case a bit sometimes
    boolean boxResult = !canOptimise;
    // (let $tmp = attr; attr = $tmp.getSuccessor(); $tmp;)
    if (term instanceof Tree.BaseMemberExpression || // special case for java statics Foo.attr where Foo does not need to be evaluated
    (term instanceof Tree.QualifiedMemberExpression && ((Tree.QualifiedMemberExpression) term).getStaticMethodReference())) {
        JCExpression getter;
        if (term instanceof Tree.BaseMemberExpression)
            getter = transform((Tree.BaseMemberExpression) term, null);
        else
            getter = transformMemberExpression((Tree.QualifiedMemberExpression) term, null, null);
        at(expr);
        // Type $tmp = attr
        JCExpression exprType = makeJavaType(returnType, boxResult ? JT_NO_PRIMITIVES : 0);
        Name varName = naming.tempName("op");
        // make sure we box the results if necessary
        getter = applyErasureAndBoxing(getter, term, boxResult ? BoxingStrategy.BOXED : BoxingStrategy.UNBOXED, returnType);
        JCVariableDecl tmpVar = make().VarDef(make().Modifiers(0), varName, exprType, getter);
        decls = decls.prepend(tmpVar);
        // attr = $tmp.getSuccessor()
        JCExpression successor;
        if (canOptimise) {
            // use +1/-1 if we can optimise a bit
            successor = make().Binary(operator == OperatorTranslation.UNARY_POSTFIX_INCREMENT ? JCTree.PLUS : JCTree.MINUS, make().Ident(varName), makeInteger(1));
            successor = unAutoPromote(successor, returnType);
        } else {
            successor = make().Apply(null, makeSelect(make().Ident(varName), operator.ceylonMethod), List.<JCExpression>nil());
            // make sure the result is boxed if necessary, the result of successor/predecessor is always boxed
            successor = boxUnboxIfNecessary(successor, true, term.getTypeModel(), CodegenUtil.getBoxingStrategy(term));
        }
        JCExpression assignment = transformAssignment(expr, term, successor);
        stats = stats.prepend(at(expr).Exec(assignment));
        // $tmp
        result = make().Ident(varName);
    } else if (term instanceof Tree.QualifiedMemberExpression) {
        // e.attr++
        // (let $tmpE = e, $tmpV = $tmpE.attr; $tmpE.attr = $tmpV.getSuccessor(); $tmpV;)
        Tree.QualifiedMemberExpression qualified = (Tree.QualifiedMemberExpression) term;
        boolean isSuper = isSuperOrSuperOf(qualified.getPrimary());
        boolean isPackage = isPackageQualified(qualified);
        // transform the primary, this will get us a boxed primary
        JCExpression e = transformQualifiedMemberPrimary(qualified);
        at(expr);
        // Type $tmpE = e
        JCExpression exprType = makeJavaType(qualified.getTarget().getQualifyingType(), JT_NO_PRIMITIVES);
        Name varEName = naming.tempName("opE");
        JCVariableDecl tmpEVar = make().VarDef(make().Modifiers(0), varEName, exprType, e);
        // Type $tmpV = $tmpE.attr
        JCExpression attrType = makeJavaType(returnType, boxResult ? JT_NO_PRIMITIVES : 0);
        Name varVName = naming.tempName("opV");
        JCExpression getter;
        if (isSuper) {
            getter = transformMemberExpression(qualified, transformSuper(qualified), null);
        } else if (isPackage) {
            getter = transformMemberExpression(qualified, null, null);
        } else {
            getter = transformMemberExpression(qualified, make().Ident(varEName), null);
        }
        // make sure we box the results if necessary
        getter = applyErasureAndBoxing(getter, term, boxResult ? BoxingStrategy.BOXED : BoxingStrategy.UNBOXED, returnType);
        JCVariableDecl tmpVVar = make().VarDef(make().Modifiers(0), varVName, attrType, getter);
        decls = decls.prepend(tmpVVar);
        if (!isSuper && !isPackage) {
            // define all the variables
            decls = decls.prepend(tmpEVar);
        }
        // $tmpE.attr = $tmpV.getSuccessor()
        JCExpression successor;
        if (canOptimise) {
            // use +1/-1 if we can optimise a bit
            successor = make().Binary(operator == OperatorTranslation.UNARY_POSTFIX_INCREMENT ? JCTree.PLUS : JCTree.MINUS, make().Ident(varVName), makeInteger(1));
            successor = unAutoPromote(successor, returnType);
        } else {
            successor = make().Apply(null, makeSelect(make().Ident(varVName), operator.ceylonMethod), List.<JCExpression>nil());
            // make sure the result is boxed if necessary, the result of successor/predecessor is always boxed
            successor = boxUnboxIfNecessary(successor, true, term.getTypeModel(), CodegenUtil.getBoxingStrategy(term));
        }
        JCExpression assignment = transformAssignment(expr, term, isSuper ? transformSuper(qualified) : make().Ident(varEName), successor);
        stats = stats.prepend(at(expr).Exec(assignment));
        // $tmpV
        result = make().Ident(varVName);
    } else {
        return makeErroneous(term, "compiler bug: " + term.getNodeType() + " is not supported yet");
    }
    return make().LetExpr(decls, stats, result);
}

Example 2 with OperatorTranslation

use of com.redhat.ceylon.compiler.java.codegen.Operators.OperatorTranslation in project ceylon-compiler by ceylon.

the class ExpressionTransformer method transformOverridableBinaryOperator.

private JCExpression transformOverridableBinaryOperator(OperatorTranslation originalOperator, OptimisationStrategy optimisationStrategy, JCExpression left, JCExpression right, Tree.Term leftTerm, Type leftType, Tree.Term rightTerm, Type expectedType) {
    JCExpression result = null;
    // optimise if we can
    if (optimisationStrategy.useJavaOperator()) {
        result = make().Binary(originalOperator.javacOperator, left, right);
        if (rightTerm != null) {
            result = unAutoPromote(result, expectedType);
        }
        return result;
    }
    boolean loseComparison = originalOperator == OperatorTranslation.BINARY_SMALLER || originalOperator == OperatorTranslation.BINARY_SMALL_AS || originalOperator == OperatorTranslation.BINARY_LARGER || originalOperator == OperatorTranslation.BINARY_LARGE_AS;
    // for comparisons we need to invoke compare()
    OperatorTranslation actualOperator = originalOperator;
    if (loseComparison) {
        actualOperator = Operators.OperatorTranslation.BINARY_COMPARE;
    }
    List<JCExpression> args = List.of(right);
    List<JCExpression> typeArgs = null;
    // Set operators need reified generics
    if (originalOperator == OperatorTranslation.BINARY_UNION || originalOperator == OperatorTranslation.BINARY_INTERSECTION || originalOperator == OperatorTranslation.BINARY_COMPLEMENT) {
        Type otherSetElementType = typeFact().getIteratedType(rightTerm.getTypeModel());
        args = args.prepend(makeReifiedTypeArgument(otherSetElementType));
        typeArgs = List.<JCExpression>of(makeJavaType(otherSetElementType, JT_TYPE_ARGUMENT));
    }
    if (optimisationStrategy.useValueTypeMethod()) {
        int flags = JT_NO_PRIMITIVES;
        if (optimisationStrategy == OptimisationStrategy.OPTIMISE_VALUE_TYPE && leftType.getDeclaration().getSelfType() != null) {
            leftType = leftType.getTypeArguments().get(leftType.getDeclaration().getSelfType().getDeclaration());
        }
        result = make().Apply(typeArgs, naming.makeQualIdent(makeJavaType(leftType, flags), actualOperator.ceylonMethod), args.prepend(left));
    } else {
        if ((originalOperator == OperatorTranslation.BINARY_LARGE_AS || originalOperator == OperatorTranslation.BINARY_LARGER || originalOperator == OperatorTranslation.BINARY_SMALL_AS || originalOperator == OperatorTranslation.BINARY_SMALLER || originalOperator == OperatorTranslation.BINARY_COMPARE) && willEraseToObject(leftType)) {
            left = make().TypeCast(makeJavaType(typeFact().getComparableDeclaration().getType(), JT_RAW), left);
            args = List.<JCExpression>of(make().TypeCast(makeJavaType(typeFact().getComparableDeclaration().getType(), JT_RAW), right));
        }
        result = make().Apply(typeArgs, makeSelect(left, actualOperator.ceylonMethod), args);
    }
    if (loseComparison) {
        // We cheat slightly bu using == instead of equals, but since those values
        // don't override equals the effect is the same
        result = make().Binary(originalOperator.javacValueOperator, result, makeLanguageValue(originalOperator.ceylonValue));
    }
    return result;
}

Example 3 with OperatorTranslation

use of com.redhat.ceylon.compiler.java.codegen.Operators.OperatorTranslation in project ceylon-compiler by ceylon.

the class ExpressionTransformer method transformOverridableUnaryOperator.

private JCExpression transformOverridableUnaryOperator(Tree.UnaryOperatorExpression op, Type expectedType) {
    at(op);
    Tree.Term term = op.getTerm();
    OperatorTranslation operator = Operators.getOperator(op.getClass());
    if (operator == null) {
        return makeErroneous(op, "compiler bug: " + op.getClass() + " is an unhandled operator class");
    }
    JCExpression ret;
    if (operator.getUnOpOptimisationStrategy(op, op.getTerm(), this).useJavaOperator()) {
        // optimisation for unboxed types
        JCExpression expr = transformExpression(term, BoxingStrategy.UNBOXED, expectedType, EXPR_WIDEN_PRIM);
        // unary + is essentially a NOOP
        if (operator == OperatorTranslation.UNARY_POSITIVE)
            return expr;
        ret = make().Unary(operator.javacOperator, expr);
        ret = unAutoPromote(ret, op.getTypeModel());
    } else {
        if (operator == OperatorTranslation.UNARY_POSITIVE) {
            // is the self type of Invertible, so use the type of op
            return transformExpression(term, BoxingStrategy.BOXED, op.getTypeModel());
        }
        ret = make().Apply(null, makeSelect(transformExpression(term, BoxingStrategy.BOXED, expectedType), Naming.getGetterName(operator.ceylonMethod)), List.<JCExpression>nil());
    }
    return ret;
}

Example 4 with OperatorTranslation

use of com.redhat.ceylon.compiler.java.codegen.Operators.OperatorTranslation in project ceylon-compiler by ceylon.

the class ExpressionTransformer method transform.

// 
// Binary operators
public JCExpression transform(Tree.NotEqualOp op) {
    OperatorTranslation operator = Operators.OperatorTranslation.BINARY_EQUAL;
    OptimisationStrategy optimisationStrategy = operator.getBinOpOptimisationStrategy(op, op.getLeftTerm(), op.getRightTerm(), this);
    // we want it unboxed only if the operator is optimised
    // we don't care about the left erased type, since equals() is on Object
    JCExpression left = transformExpression(op.getLeftTerm(), optimisationStrategy.getBoxingStrategy(), null, EXPR_WIDEN_PRIM);
    // we don't care about the right erased type, since equals() is on Object
    JCExpression expr = transformOverridableBinaryOperator(op.getLeftTerm(), op.getRightTerm(), null, operator, optimisationStrategy, left, op.getTypeModel());
    return at(op).Unary(JCTree.NOT, expr);
}

Example 5 with OperatorTranslation

use of com.redhat.ceylon.compiler.java.codegen.Operators.OperatorTranslation in project ceylon-compiler by ceylon.

the class ExpressionTransformer method transform.

// Prefix operator
public JCExpression transform(final Tree.PrefixOperatorExpression expr) {
    final OperatorTranslation operator = Operators.getOperator(expr.getClass());
    if (operator == null) {
        return makeErroneous(expr, "compiler bug: " + expr.getNodeType() + " is not supported yet");
    }
    OptimisationStrategy optimisationStrategy = operator.getUnOpOptimisationStrategy(expr, expr.getTerm(), this);
    final boolean canOptimise = optimisationStrategy.useJavaOperator();
    Tree.Term term = expr.getTerm();
    // only fully optimise if we don't have to access the getter/setter
    if (canOptimise && CodegenUtil.isDirectAccessVariable(term)) {
        JCExpression jcTerm = transformExpression(term, BoxingStrategy.UNBOXED, expr.getTypeModel(), EXPR_WIDEN_PRIM);
        return at(expr).Unary(operator.javacOperator, jcTerm);
    }
    Interface compoundType = expr.getUnit().getOrdinalDeclaration();
    Type valueType = getSupertype(term, compoundType);
    final Type returnType = getMostPreciseType(term, getTypeArgument(valueType, 0));
    // we work on boxed types unless we could have optimised
    return transformAssignAndReturnOperation(expr, term, !canOptimise, valueType, returnType, new AssignAndReturnOperationFactory() {

        @Override
        public JCExpression getNewValue(JCExpression previousValue) {
            // use +1/-1 if we can optimise a bit
            if (canOptimise) {
                JCExpression ret = make().Binary(operator == OperatorTranslation.UNARY_PREFIX_INCREMENT ? JCTree.PLUS : JCTree.MINUS, previousValue, makeInteger(1));
                ret = unAutoPromote(ret, returnType);
                return ret;
            }
            // make this call: previousValue.getSuccessor() or previousValue.getPredecessor()
            return make().Apply(null, makeSelect(previousValue, operator.ceylonMethod), List.<JCExpression>nil());
        }
    });
}