Teoti Graphix, LLC

// where the project will be output
var output:File = File.desktopDirectory.resolvePath("project/src");
 
// create a factory that will create AST
var factory:AS3Factory = new AS3Factory();
// create a new project to hold .as files
var project:IAS3Project = factory.newASProject(output.nativePath);
 
// create a public class with package 'com.acme.core'
var file:ISourceFile = project.newClass("com.acme.core.HelloWorld");
var typeNode:IClassTypeNode = file.compilationNode.typeNode as IClassTypeNode;
// mark he class final (can do the same for IsDynamic)
typeNode.isFinal = true;
//add metadata to the class
var event:IMetaDataNode = typeNode.newMetaData("Event");
event.addNamedStringParameter("name", "myEvent");
event.addNamedStringParameter("type", "flash.events.Event");
 
var style:IMetaDataNode = typeNode.newMetaData("Style");
style.addNamedStringParameter("name", "myStyle");
style.addNamedStringParameter("type", "Number");
style.addNamedStringParameter("inherit", "no");
 
var bindable:IMetaDataNode = typeNode.newMetaData("Bindable");
 
// add class comment
typeNode.description = "A class comment.\n " +
	"<p>Long description documentation.</p>";
 
typeNode.addDocTag("author", "Michael Schmalle");
typeNode.addDocTag("copyright", "Teoti Graphix, LLC");
typeNode.addDocTag("productversion", "1.0");
typeNode.addDocTag("see", "MyOtherClass More details here.");
 
// add a method
var method:IMethodNode = typeNode.newMethod(
	"helloTest", Modifier.PUBLIC, IdentifierNode.createType("String"));
// add a parameter
var param:IParameterNode = method.addParameter(
	"arg0", IdentifierNode.createType("String"), "''");
// add a comment to the method
method.description = "A hello test method.\n <p>Long description.</p>";
method.addDocTag("since", "1.0");
// add a description to the parameter
param.description = "The String argument at 0";
// add a return tag to the method
method.addReturnDescription("A String indicating the result.");
 
// add a method with rest
// add a method
var methodRest:IMethodNode = typeNode.newMethod(
	"helloRestTest", Modifier.create("mx_internal"), 
	IdentifierNode.createType("my.domain.ITest"));
 
// add a parameter
var arg0:IParameterNode = methodRest.addParameter(
	"arg0", IdentifierNode.createType("int"));
var rest:IParameterNode = methodRest.addRestParameter("theRest");
 
var result:String = BuilderFactory.instance.buildFile(file);
 
trace(result);

package com.acme.core {
    [Event(name="myEvent",type="flash.events.Event")]
    [Style(name="myStyle",type="Number",inherit="no")]
    [Bindable]
    /**
     * A class comment.
     * 
     * <p>Long description documentation.</p> 
     * 
     * @author Michael Schmalle
     * @copyright Teoti Graphix, LLC
     * @productversion 1.0
     * @see MyOtherClass More details here.
     */
    public final class HelloWorld {
        /**
         * A hello test method.
         * 
         * <p>Long description.</p> 
         * 
         * @since 1.0
         * @param arg0 The String argument at 0
         * @return A String indicating the result.
         */
        public function helloTest(arg0:String = ''):String {
        }
        mx_internal function helloRestTest(arg0:int, ...theRest):ITest {
        }
    }
}