Examples with JCExpression com.sun.tools.javac.tree.JCTree.JCExpression used on opensource projects

Example 76 with JCExpression

use of com.sun.tools.javac.tree.JCTree.JCExpression 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 77 with JCExpression

use of com.sun.tools.javac.tree.JCTree.JCExpression in project ceylon-compiler by ceylon.

the class ExpressionTransformer method transformExpression.

JCExpression transformExpression(final Tree.Term expr, BoxingStrategy boxingStrategy, Type expectedType, int flags) {
    if (expr == null) {
        return null;
    }
    at(expr);
    if (inStatement && boxingStrategy != BoxingStrategy.INDIFFERENT) {
        // We're not directly inside the ExpressionStatement anymore
        inStatement = false;
    }
    // Cope with things like ((expr))
    // FIXME: shouldn't that be in the visitor?
    Tree.Term term = expr;
    while (term instanceof Tree.Expression) {
        term = ((Tree.Expression) term).getTerm();
    }
    JCExpression result;
    if (term instanceof Tree.SequenceEnumeration) {
        // special case to be able to pass expected type to sequences
        result = transform((Tree.SequenceEnumeration) term, expectedType);
    } else if (term instanceof Tree.DefaultOp) {
        // special case to be able to pass expected type to else op
        result = transform((Tree.DefaultOp) term, expectedType);
    } else if (term instanceof Tree.LetExpression) {
        // special case to be able to pass expected type to let op
        result = transform((Tree.LetExpression) term, expectedType);
    } else if (term instanceof Tree.IfExpression) {
        // special case to be able to pass expected type to if op
        result = transform((Tree.IfExpression) term, expectedType);
    } else if (term instanceof Tree.SwitchExpression) {
        // special case to be able to pass expected type to switch op
        result = transform((Tree.SwitchExpression) term, expectedType);
    } else {
        CeylonVisitor v = gen().visitor;
        final ListBuffer<JCTree> prevDefs = v.defs;
        final boolean prevInInitializer = v.inInitializer;
        final ClassDefinitionBuilder prevClassBuilder = v.classBuilder;
        try {
            v.defs = new ListBuffer<JCTree>();
            v.inInitializer = false;
            v.classBuilder = gen().current();
            term.visit(v);
            if (v.hasResult()) {
                result = v.getSingleResult();
                if (result == null) {
                    throw new BugException(term, "visitor yielded multiple results");
                }
            } else {
                throw new BugException(term, "visitor didn't yield any result");
            }
        } catch (BugException e) {
            result = e.makeErroneous(this, expr);
        } finally {
            v.classBuilder = prevClassBuilder;
            v.inInitializer = prevInInitializer;
            v.defs = prevDefs;
        }
    }
    if ((flags & EXPR_TARGET_ACCEPTS_NULL) == 0 && expectedType != null && hasUncheckedNulls(expr) && expectedType.isSubtypeOf(typeFact().getObjectType())) {
        result = utilInvocation().checkNull(result);
        flags |= EXPR_HAS_NULL_CHECK_FENCE;
    }
    result = applyErasureAndBoxing(result, expr, boxingStrategy, expectedType, flags);
    return result;
}

Example 78 with JCExpression

use of com.sun.tools.javac.tree.JCTree.JCExpression in project ceylon-compiler by ceylon.

the class ExpressionTransformer method transformOptimizedIntegerPower.

private JCExpression transformOptimizedIntegerPower(Tree.Term base, Long power) {
    JCExpression baseExpr = transformExpression(base, BoxingStrategy.UNBOXED, base.getTypeModel());
    if (power == 1) {
        return baseExpr;
    }
    SyntheticName baseAlias = naming.alias("base");
    JCExpression multiplications = baseAlias.makeIdent();
    while (power > 1) {
        power--;
        multiplications = make().Binary(JCTree.MUL, multiplications, baseAlias.makeIdent());
    }
    return make().LetExpr(makeVar(baseAlias, makeJavaType(base.getTypeModel()), baseExpr), multiplications);
}

Example 79 with JCExpression

use of com.sun.tools.javac.tree.JCTree.JCExpression in project ceylon-compiler by ceylon.

the class ExpressionTransformer method transform.

public JCTree transform(Tree.Exists op) {
    // for the purpose of checking if something is null, we need it boxed and optional, otherwise
    // for some Java calls if we consider it non-optional we will get an unwanted null check
    Type termType = op.getTerm().getTypeModel();
    if (!typeFact().isOptionalType(termType)) {
        termType = typeFact().getOptionalType(termType);
    }
    JCExpression expression = transformExpression(op.getTerm(), BoxingStrategy.BOXED, termType);
    at(op);
    return make().Binary(JCTree.NE, expression, makeNull());
}

Example 80 with JCExpression

use of com.sun.tools.javac.tree.JCTree.JCExpression 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);
}