HaxeFoundation.haxe/std/js/_std/Reflect.hx

/*
 * Copyright (C)2005-2018 Haxe Foundation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */
@:coreApi class Reflect {

	@:pure
	public inline static function hasField( o : Dynamic, field : String ) : Bool {
		return js.Object.prototype.hasOwnProperty.call(o, field);
	}

	@:pure
	public static function field( o : Dynamic, field : String ) : Dynamic {
		try return o[cast field] catch( e : Dynamic ) return null;
	}

	public inline static function setField( o : Dynamic, field : String, value : Dynamic ) : Void {
		o[cast field] = value;
	}

	public static function getProperty( o : Dynamic, field : String ) : Dynamic untyped {
		var tmp;
		return if( o == null ) __define_feature__("Reflect.getProperty",null) else if( o.__properties__ && (tmp=o.__properties__["get_"+field]) ) o[tmp]() else o[field];
	}

	public static function setProperty( o : Dynamic, field : String, value : Dynamic ) : Void untyped {
		var tmp;
		if( o.__properties__ && (tmp=o.__properties__["set_"+field]) ) o[tmp](value) else o[field] = __define_feature__("Reflect.setProperty",value);
	}

	public inline static function callMethod( o : Dynamic, func : haxe.Constraints.Function, args : Array<Dynamic> ) : Dynamic {
		return (cast func : js.Function).apply(o,args);
	}

	public static function fields( o : Dynamic ) : Array<String> {
		var a = [];
		if (o != null) untyped {
			var hasOwnProperty = js.Object.prototype.hasOwnProperty;
			__js__("for( var f in o ) {");
			if( f != "__id__" && f != "hx__closures__" && hasOwnProperty.call(o, f) ) a.push(f);
			__js__("}");
		}
		return a;
	}

	@:access(js.Boot)
	public static function isFunction( f : Dynamic ) : Bool {
		return js.Syntax.typeof(f) == "function" && !(js.Boot.isClass(f) || js.Boot.isEnum(f));
	}

	public static function compare<T>( a : T, b : T ) : Int {
		return ( a == b ) ? 0 : (((cast a) > (cast b)) ? 1 : -1);
	}

	public static function compareMethods( f1 : Dynamic, f2 : Dynamic ) : Bool {
		if( f1 == f2 )
			return true;
		if( !isFunction(f1) || !isFunction(f2) )
			return false;
		return f1.scope == f2.scope && f1.method == f2.method && f1.method != null;
	}

	@:access(js.Boot)
	public static function isObject( v : Dynamic ) : Bool {
		if( v == null )
			return false;
		var t = js.Syntax.typeof(v);
		return (t == "string" || (t == "object" && v.__enum__ == null)) || (t == "function" && (js.Boot.isClass(v) || js.Boot.isEnum(v)) != null);
	}

	public static function isEnumValue( v : Dynamic ) : Bool {
		return v != null && v.__enum__ != null;
	}

	public static function deleteField( o : Dynamic, field : String ) : Bool {
		if( !hasField(o,field) ) return false;
		js.Syntax.delete(o, field);
		return true;
	}

	public static function copy<T>( o : T ) : T {
		var o2 : Dynamic = {};
		for( f in Reflect.fields(o) )
			Reflect.setField(o2,f,Reflect.field(o,f));
		return o2;
	}

	@:overload(function( f : Array<Dynamic> -> Void ) : Dynamic {})
	public static function makeVarArgs( f : Array<Dynamic> -> Dynamic ) : Dynamic {
		return function() {
			var a = untyped Array.prototype.slice.call(__js__("arguments"));
			return f(a);
		};
	}

}