Examples of org.codehaus.groovy.ast.expr.ConstantExpression

org.codehaus.groovy.ast.expr.ConstantExpression
Represents a constant expression such as null, true, false @author James Strachan @version $Revision: 21186 $

    public static BinaryExpression cmpX(Expression lhv, Expression rhv) {
        return new BinaryExpression(lhv, CMP, rhv);
    }


    public static ConstantExpression constX(Object val) {
        return new ConstantExpression(val);
    }

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    public static ConstantExpression constX(Object val) {
        return new ConstantExpression(val);
    }


    public static ConstantExpression constX(Object val, boolean keepPrimitive) {
        return new ConstantExpression(val, keepPrimitive);
    }

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    public static BinaryExpression eqX(Expression lhv, Expression rhv) {
        return new BinaryExpression(lhv, EQ, rhv);
    }


    public static BooleanExpression equalsNullX(Expression argExpr) {
        return new BooleanExpression(eqX(argExpr, new ConstantExpression(null)));
    }

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    public static BooleanExpression isInstanceOfX(Expression objectExpression, ClassNode cNode) {
        return new BooleanExpression(new BinaryExpression(objectExpression, INSTANCEOF, classX(cNode)));
    }


    public static BooleanExpression isOneX(Expression expr) {
        return new BooleanExpression(new BinaryExpression(expr, EQ, new ConstantExpression(1)));
    }

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    public static boolean isOrImplements(ClassNode type, ClassNode interfaceType) {
        return type.equals(interfaceType) || type.implementsInterface(interfaceType);
    }


    public static BooleanExpression isTrueX(Expression argExpr) {
        return new BooleanExpression(new BinaryExpression(argExpr, EQ, new ConstantExpression(Boolean.TRUE)));
    }

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    public static BooleanExpression isTrueX(Expression argExpr) {
        return new BooleanExpression(new BinaryExpression(argExpr, EQ, new ConstantExpression(Boolean.TRUE)));
    }


    public static BooleanExpression isZeroX(Expression expr) {
        return new BooleanExpression(new BinaryExpression(expr, EQ, new ConstantExpression(0)));
    }

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    public static BinaryExpression neX(Expression lhv, Expression rhv) {
        return new BinaryExpression(lhv, NE, rhv);
    }


    public static BooleanExpression notNullX(Expression argExpr) {
        return new BooleanExpression(new BinaryExpression(argExpr, NE, new ConstantExpression(null)));
    }

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        Parameter[] parameters = new Parameter[]{new Parameter(ClassHelper.METACLASS_TYPE, "mc")};
        if (!node.hasMethod("setMetaClass", parameters)) {
            metaClassField = setMetaClassFieldIfNotExists(node, metaClassField);
            Statement setMetaClassCode;
            if (Modifier.isFinal(metaClassField.getModifiers())) {
                ConstantExpression text = new ConstantExpression("cannot set read-only meta class");
                ConstructorCallExpression cce = new ConstructorCallExpression(ClassHelper.make(IllegalArgumentException.class), text);
                setMetaClassCode = new ExpressionStatement(cce);
            } else {
                List list = new ArrayList();
                list.add(new BytecodeInstruction() {

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            if (fieldNode.isStatic()) {
                // GROOVY-3311: pre-defined constants added by groovy compiler for numbers/characters should be
                // initialized first so that code dependent on it does not see their values as empty
                Expression initialValueExpression = fieldNode.getInitialValueExpression();
                if (initialValueExpression instanceof ConstantExpression) {
                    ConstantExpression cexp = (ConstantExpression) initialValueExpression;
                    cexp = transformToPrimitiveConstantIfPossible(cexp);
                    if (fieldNode.isFinal() && ClassHelper.isStaticConstantInitializerType(cexp.getType()) && cexp.getType().equals(fieldNode.getType())) {
                        return; // GROOVY-5150: primitive type constants will be initialized directly
                    }
                    staticList.add(0, statement);
                } else {
                    staticList.add(statement);

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        for (FieldNode fn : node.getFields()) {
            if (!fn.isStatic() || !fn.isSynthetic() || !fn.getName().startsWith("$const$")) continue;
            if (fn.getInitialExpression()==null) continue;
            final FieldExpression fe = new FieldExpression(fn);
            if (fn.getType().equals(ClassHelper.REFERENCE_TYPE)) fe.setUseReferenceDirectly(true);
            ConstantExpression init = (ConstantExpression) fn.getInitialExpression();
            ExpressionStatement statement =
                    new ExpressionStatement(
                            new BinaryExpression(
                                    fe,
                                    Token.newSymbol(Types.EQUAL, fn.getLineNumber(), fn.getColumnNumber()),
                                    init));
            fn.setInitialValueExpression(null);
            init.setConstantName(null);
            methodCode.addStatement(statement);
            swapInitRequired = true;
        }


        if (swapInitRequired) {

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