view src/impl/hoofbaby/util/conv.d @ 0:3425707ddbf6

Initial import (hopefully this mercurial stuff works...)
author fraserofthenight
date Mon, 06 Jul 2009 08:06:28 -0700
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/**
 * Hoofbaby -- http://www.dsource.org/projects/hoofbaby
 * Copyright (C) 2009 Robert Fraser
 * 
 * This program is free software; you can redistribute it andor
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

module hoofbaby.util.conv;

//------------------------------------------------------------------------------
// Fast casting

/**
 * Cast without a typecheck. Use only if you're certain T is actually a U.
 * 
 * Params:
 *     v = The value to cast from
 * Returns: v as a T
 */
public T as(T, U)(U v)
{
	static assert(is(T : U));
	return cast(T) (cast(void*) v);
}

public T checkedCast(T, U)(U v)
{
	static assert(is(T : U));
	if(v is null)
		return null;
	T ret = cast(T) v;
	assert(ret !is null, "Expected " ~ T.stringof ~ ", but got " ~ v.classinfo.name);
	return ret;
}

//------------------------------------------------------------------------------
// Mixin generation