I'm so disappointed that DMDScript doesn't support such core features of ECMAScript!

If you never plan to support closure, please don't declare DMDScript as a implementation of ECMA 262.


Test code
=========

// for browsers
if (typeof alert != 'undefined') {
	print = function () {
		alert(Array.prototype.slice.call(arguments).join(' '));
	}
}
// for jshost (jslibs)
else if (typeof LoadModule != 'undefined') {
	LoadModule('jsstd');
	print = function () {
		Print(Array.prototype.join.call(arguments, ' '), '\n');
	}
}
// for DMDScript
else if (typeof ScriptEngine == 'function' && ScriptEngine() == 'DMDScript') {
	_print = print;
	print = function () {
		_print(Array.prototype.join.call(arguments, ' '), '\n');
	}
}

void function () {

	function A(x) {
		function B() {
			return x * x;
		}
		return B;
	}

	var b1 = A(1);
	var b2 = A(2);

	print('b1() =', b1());
	print('b2() =', b2());
	print('b1', b1 == b2 ? '==' : '!=', 'b2');

}.call();

=================
Result of the browsers, rhino, jshost(SpiderMonkey):

b1() = 1
b2() = 4
b1 != b2

Result of DMDScript:

Digital Mars DMDScript 1.13
www.digitalmars.com
Compiled by Digital Mars DMD D compiler
Copyright (c) 1999-2007 by Digital Mars
written by Walter Bright
1 source files

b1() = NaN
b2() = NaN
b1 == b2


BTW, DMDScript doesn't allow definitely correct function calling syntax:

(function (s) { print(s) })('Hello world')
void function (s) { print(s) } ('Hello world')

So I must write

void function () {...}.call()

Too bad! You should fix it.

this is fixed in my modified dmdscript

http://www.akbkhome.com/svn/gtkDS/
download a tarball here.
http://devel.akbkhome.com/gtkjs/

The problem revolves around dmdscript caching function defintions, rather than creating new references where they are found. It required an additional opcode IRfunction, and a few changes to the call method for ddeclaredfunction.

Regards
Alan


hax wrote:
> I'm so disappointed that DMDScript doesn't support such core features of
> ECMAScript!
> 
> If you never plan to support closure, please don't declare DMDScript as a
> implementation of ECMA 262.
> 
> 
> Test code
> =========
> 
> // for browsers
> if (typeof alert != 'undefined') {
> 	print = function () {
> 		alert(Array.prototype.slice.call(arguments).join(' '));
> 	}
> }
> // for jshost (jslibs)
> else if (typeof LoadModule != 'undefined') {
> 	LoadModule('jsstd');
> 	print = function () {
> 		Print(Array.prototype.join.call(arguments, ' '), '\n');
> 	}
> }
> // for DMDScript
> else if (typeof ScriptEngine == 'function' && ScriptEngine() == 'DMDScript') {
> 	_print = print;
> 	print = function () {
> 		_print(Array.prototype.join.call(arguments, ' '), '\n');
> 	}
> }
> 
> void function () {
> 
> 	function A(x) {
> 		function B() {
> 			return x * x;
> 		}
> 		return B;
> 	}
> 
> 	var b1 = A(1);
> 	var b2 = A(2);
> 
> 	print('b1() =', b1());
> 	print('b2() =', b2());
> 	print('b1', b1 == b2 ? '==' : '!=', 'b2');
> 
> }.call();
> 
> =================
> Result of the browsers, rhino, jshost(SpiderMonkey):
> 
> b1() = 1
> b2() = 4
> b1 != b2
> 
> Result of DMDScript:
> 
> Digital Mars DMDScript 1.13
> www.digitalmars.com
> Compiled by Digital Mars DMD D compiler
> Copyright (c) 1999-2007 by Digital Mars
> written by Walter Bright
> 1 source files
> 
> b1() = NaN
> b2() = NaN
> b1 == b2
> 
> 
> BTW, DMDScript doesn't allow definitely correct function calling syntax:
> 
> (function (s) { print(s) })('Hello world')
> void function (s) { print(s) } ('Hello world')
> 
> So I must write
> 
> void function () {...}.call()
> 

> `
> end