joseoliv

package main

// import a Cyan package
import cyan.math
import cyan.reflect
// import a Java package
import java.lang

   
@doc{*

joseoliv

package main

object Program
    func run {
        "Hello world" println
    }
end

joseoliv

package metaobjectTest


@doc{*
  This annotation takes two parameters. The first is a number. There should be
  an error from the line of the annotation plus this number. The second parameter 
  is the error message that the compiler should issue (or a similar message).
  The compiler checks if there is an error in the indicated line. If not,
  an error message is issued. That is, suppose the code
        @cep(1, "Expression expected)

joseoliv

package metaobjectTest


@doc{*
  Annotation 'symbolToString' takes a single parameter and produces
  a string whose contents is the parameter. Then the annotation is
  an expression of type String. 
  
  This annotation is used mainly in generic prototypes to convert
  a generic parameter to a string.

joseoliv

package metaobjectTest


@doc{*
  Annotation 'shout' can be attached to a method. It changes 
  all strings to uppercase letters. This is a demonstration
  metaobject, of course.
*}
object Shout

joseoliv

package metaobjectTest


@doc{*
  Metaobject 'shouldCallSuperMethod' is an action function. Its 
  associated metaobject declares a method 'eval' that may be 
  called by other metaobjects. It cannot be associated to 
  an annotation:
        // compile-time error
        @shouldCallSuperMethod

joseoliv

package metaobjectTest


@doc{*
  Annotation 'GetPackageValueFromKey' is String expression. It is
  "" if its parameter is not a key of the package of the current 
  prototype. If it is, the expression is the value associated to 
  the key in the package but transformed into a string by either 
  method toString of Java or method asString of Cyan.
  

joseoliv

package metaobjectTest


@doc{*
  Annotation 'getProgramValueFromKey' is String expression. It is
  "" if its parameter is not a program key. If it is, the expression
  is the value associated to the key in the program but 
  transformed into a string by either method toString of Java or
  method asString of Cyan.
  

joseoliv

package metaobjectTest


@doc{*
  Annotation 'setVariable' can be attached to the program or a package.
  It takes two parameters, a key and a value, and associates the
  program or package key to the value. If the attached annotation is
  the program, the value can be got from method 
        Object getProgramValueFromKey(String key)
  of WrProgram. If the attached annotation is a package, the value can 

joseoliv

package metaobjectTest

import cyan.io

@doc{*
  Annotation 'runPastCode' 
*}
object RunPastCode