[GROOVY-3971] adding method to class in ASTBuilder not working

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.7-rc-2
• Fix Version/s: 2.4.0-beta-1
• Component/s: ast builder
• Environment: Groovy 1.7-RC-2 on jre1.6.0_04 on Windows Vista SP2
• Assignee: Paul King
• Reporter: Gavin Grover
• Created: 03/Jan/10 21:22
• Updated: 11/Jun/14 14:25
• Resolved: 09/Jun/14 02:09

Description

The following code produces class MyClass OK, but running the class produces error:
Exception in thread "main" java.lang.NoSuchMethodError: main

Here's the ASTBuilder code I used:

import static org.objectweb.asm.Opcodes.ACC_PUBLIC
import static org.objectweb.asm.Opcodes.ACC_STATIC
import org.codehaus.groovy.ast.builder.AstBuilder
import org.codehaus.groovy.control.CompilerConfiguration
import org.codehaus.groovy.control.CompilationUnit

def classes= new AstBuilder().buildFromSpec{
  classNode 'MyClass', ACC_PUBLIC, {
    classNode Object //superclass
    interfaces{
      classNode GroovyObject
    }
    mixins{}
    genericsTypes{}
    method('main', ACC_PUBLIC & ACC_STATIC, Void.class) {
      parameters{
        parameter 'args': String[].class
      }
      exceptions{}
      block{
        methodCall {
          variable "this"
          constant "println"
          argumentList {
            constant "Hello, world!"
          }
        }
      }
    }
  }
}

def gcl= new GroovyClassLoader()
def sec= null
def ccfg= CompilerConfiguration.DEFAULT
def cu= new CompilationUnit(ccfg, sec, gcl)
cu.addClassNode(classes[0])
cu.compile() 

Also tried this but same result:

import static org.objectweb.asm.Opcodes.ACC_PUBLIC
import static org.objectweb.asm.Opcodes.ACC_STATIC
import org.codehaus.groovy.ast.*
import java.security.CodeSource
import org.codehaus.groovy.ast.builder.AstBuilder
import org.codehaus.groovy.control.CompilerConfiguration
import org.codehaus.groovy.control.CompilationUnit
import org.codehaus.groovy.control.CompilePhase

def classes= new AstBuilder().buildFromString(CompilePhase.CONVERSION, """\
public class MyClass{
  public static void main(String[] args){
    println "Hello, world!"
  }
}
""")

def gcl= new GroovyClassLoader()
def sec= null //new CodeSource()
def ccfg= CompilerConfiguration.DEFAULT
def cu= new CompilationUnit(ccfg, sec, gcl)
cu.addClassNode(classes[1])
cu.compile()