import org.codehaus.groovy.transform.GroovyASTTransformationClass;

@GroovyASTTransformationClass({"MagicFieldTransform"})

import org.junit.Test

@MagicField @MagicInterface
class MagicFieldTransformTest {
    @Test
    void transformHasBeenApplied() {
        assert getClass().declaredFields.find { it.name == "magicField" }
        assert magicField == "magicValue"
        assert this instanceof Marker
    }

import org.junit.Test

@GroovyMagicField
class GroovyMagicFieldTransformTest {
    @Test
    void transformHasBeenApplied() {
        assert getClass().declaredFields.find { it.name == "magicField" }
        assert magicField == "magicValue"
    }

import org.junit.Test

@GroovyMagicField
class GroovyMagicFieldTransformTest {
    @Test
    void transformHasBeenApplied() {
        assert getClass().declaredFields.find { it.name == "magicField" }
        assert magicField == "magicValue"
    }

@GroovyASTTransformation
class GroovyMagicFieldTransform implements ASTTransformation {
    void visit(ASTNode[] nodes, SourceUnit source) {
        def clazz = (ClassNode) nodes[1]
        clazz.addField("magicField", Modifier.PUBLIC, ClassHelper.STRING_TYPE, new ConstantExpression("magicValue"))
    }

@GroovyASTTransformation
public class MagicFieldTransform implements ASTTransformation {
    public void visit(ASTNode[] nodes, SourceUnit source) {
        ClassNode clazz = (ClassNode) nodes[1];
        clazz.addField("magicField", Modifier.PUBLIC, ClassHelper.STRING_TYPE, new ConstantExpression("magicValue"));
    }

@GroovyASTTransformation
class GroovyMagicFieldTransform implements ASTTransformation, Opcodes {
    void visit(ASTNode[] nodes, SourceUnit source) {
        def clazz = (ClassNode) nodes[1]
        clazz.addField("magicField", ACC_PUBLIC, ClassHelper.STRING_TYPE, new StringExpressionThroughAsm())
    }

    private class StringExpressionThroughAsm extends BytecodeExpression {
        StringExpressionThroughAsm() {