Fix semdiff syntactic output
[hiphop-php.git] / hphp / util / safe-cast.h
blob85bc13fe010b5dcd547d357d530822a46dc184ca
1 /*
2 +----------------------------------------------------------------------+
3 | HipHop for PHP |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 2010-present Facebook, Inc. (http://www.facebook.com) |
6 +----------------------------------------------------------------------+
7 | This source file is subject to version 3.01 of the PHP license, |
8 | that is bundled with this package in the file LICENSE, and is |
9 | available through the world-wide-web at the following url: |
10 | http://www.php.net/license/3_01.txt |
11 | If you did not receive a copy of the PHP license and are unable to |
12 | obtain it through the world-wide-web, please send a note to |
13 | license@php.net so we can mail you a copy immediately. |
14 +----------------------------------------------------------------------+
16 #ifndef incl_HPHP_SAFE_CAST_H_
17 #define incl_HPHP_SAFE_CAST_H_
19 #include <string>
20 #include <boost/numeric/conversion/cast.hpp>
22 #include <folly/Conv.h>
24 #include "hphp/util/compilation-flags.h"
25 #include "hphp/util/portability.h"
27 namespace HPHP {
29 //////////////////////////////////////////////////////////////////////
31 [[noreturn]]
32 void safe_cast_failure(const std::string&, const char*, const char*);
34 //////////////////////////////////////////////////////////////////////
37 * Optionally DEBUG-only wrappers around boost::numeric_cast that convert any
38 * thrown exceptions to a failed assertion.
41 template<typename To, typename From>
42 To always_safe_cast(From val) {
43 try {
44 return boost::numeric_cast<To>(val);
45 } catch (std::bad_cast& bce) {
46 safe_cast_failure(
47 folly::to<std::string>(val),
48 // The function is always safe_cast, but will indicate which
49 // types were involved.
50 __PRETTY_FUNCTION__,
51 bce.what()
56 template<typename To, typename From>
57 To safe_cast(From val) {
58 return debug ? always_safe_cast<To>(val) : static_cast<To>(val);
61 //////////////////////////////////////////////////////////////////////
65 #endif