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/**
* (C) Copyright 2007-2008 Jeremy Maitin-Shepard
*
* Use, modification, and distribution are subject to the terms specified in the
* COPYING file.
**/
var _keyword_argument_list = [];
function _get_keyword_argument_setter (name) {
return function (value) { _keyword_argument_list.push(name); return value; };
}
function _get_keyword_argument_getter (name) {
return function () { _keyword_argument_list.push(name); return true; };
}
// This function must be called with all string arguments, all of
// which must begin with "$".
function define_keywords () {
for (var i = 0, alen = arguments.length; i < alen; ++i) {
var name = arguments[i];
this.__defineSetter__(name, _get_keyword_argument_setter(name));
this.__defineGetter__(name, _get_keyword_argument_getter(name));
}
}
var define_keyword = define_keywords;
function write_keywords (output, input, first_index) {
if (first_index == null) {
first_index = input.callee.length;
}
let max_index = input.length;
let count = max_index - first_index;
if (count > 0) {
let offset = _keyword_argument_list.length - 1;
for (let i = max_index - 1; i >= first_index; --i) {
let value = input[i];
if (value instanceof keyword_argument_forwarder) {
for (let x in value)
output[x] = value[x];
--count;
} else {
let name = _keyword_argument_list[offset--];
output[name] = value;
}
}
_keyword_argument_list.length -= count;
}
}
function keyword_argument_forwarder (args) {
if ("_processed_keywords" in args) {
for (let x in args) {
if (x[0] == "$")
this[x] = args[x];
}
} else {
write_keywords(this, args);
}
}
function keywords (args) {
write_keywords(args, arguments);
write_keywords(args, args);
args._processed_keywords = true;
}
function forward_keywords (args) {
return new keyword_argument_forwarder(args);
}
function protect_keywords () {
return new keyword_argument_forwarder(arguments);
}
provide("keywords");
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