ocrm.bsky.social
the game where you go into mines and start crafting! but for consoles (forked directly from smartcmd's github)
1// boost cast.hpp header file ----------------------------------------------//
2
3// (C) Copyright Kevlin Henney and Dave Abrahams 1999.
4// Distributed under the Boost
5// Software License, Version 1.0. (See accompanying file
6// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
7
8// See http://www.boost.org/libs/conversion for Documentation.
9
10// Revision History
11// 23 JUn 05 numeric_cast removed and redirected to the new verion (Fernando Cacciola)
12// 02 Apr 01 Removed BOOST_NO_LIMITS workarounds and included
13// <boost/limits.hpp> instead (the workaround did not
14// actually compile when BOOST_NO_LIMITS was defined in
15// any case, so we loose nothing). (John Maddock)
16// 21 Jan 01 Undid a bug I introduced yesterday. numeric_cast<> never
17// worked with stock GCC; trying to get it to do that broke
18// vc-stlport.
19// 20 Jan 01 Moved BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS to config.hpp.
20// Removed unused BOOST_EXPLICIT_TARGET macro. Moved
21// boost::detail::type to boost/type.hpp. Made it compile with
22// stock gcc again (Dave Abrahams)
23// 29 Nov 00 Remove nested namespace cast, cleanup spacing before Formal
24// Review (Beman Dawes)
25// 19 Oct 00 Fix numeric_cast for floating-point types (Dave Abrahams)
26// 15 Jul 00 Suppress numeric_cast warnings for GCC, Borland and MSVC
27// (Dave Abrahams)
28// 30 Jun 00 More MSVC6 wordarounds. See comments below. (Dave Abrahams)
29// 28 Jun 00 Removed implicit_cast<>. See comment below. (Beman Dawes)
30// 27 Jun 00 More MSVC6 workarounds
31// 15 Jun 00 Add workarounds for MSVC6
32// 2 Feb 00 Remove bad_numeric_cast ";" syntax error (Doncho Angelov)
33// 26 Jan 00 Add missing throw() to bad_numeric_cast::what(0 (Adam Levar)
34// 29 Dec 99 Change using declarations so usages in other namespaces work
35// correctly (Dave Abrahams)
36// 23 Sep 99 Change polymorphic_downcast assert to also detect M.I. errors
37// as suggested Darin Adler and improved by Valentin Bonnard.
38// 2 Sep 99 Remove controversial asserts, simplify, rename.
39// 30 Aug 99 Move to cast.hpp, replace value_cast with numeric_cast,
40// place in nested namespace.
41// 3 Aug 99 Initial version
42
43#ifndef BOOST_CAST_HPP
44#define BOOST_CAST_HPP
45
46# include <boost/config.hpp>
47# include <boost/assert.hpp>
48# include <typeinfo>
49# include <boost/type.hpp>
50# include <boost/limits.hpp>
51# include <boost/detail/select_type.hpp>
52
53// It has been demonstrated numerous times that MSVC 6.0 fails silently at link
54// time if you use a template function which has template parameters that don't
55// appear in the function's argument list.
56//
57// TODO: Add this to config.hpp?
58# if defined(BOOST_MSVC) && BOOST_MSVC < 1300
59# define BOOST_EXPLICIT_DEFAULT_TARGET , ::boost::type<Target>* = 0
60# else
61# define BOOST_EXPLICIT_DEFAULT_TARGET
62# endif
63
64namespace boost
65{
66// See the documentation for descriptions of how to choose between
67// static_cast<>, dynamic_cast<>, polymorphic_cast<> and polymorphic_downcast<>
68
69// polymorphic_cast --------------------------------------------------------//
70
71 // Runtime checked polymorphic downcasts and crosscasts.
72 // Suggested in The C++ Programming Language, 3rd Ed, Bjarne Stroustrup,
73 // section 15.8 exercise 1, page 425.
74
75 template <class Target, class Source>
76 inline Target polymorphic_cast(Source* x BOOST_EXPLICIT_DEFAULT_TARGET)
77 {
78 Target tmp = dynamic_cast<Target>(x);
79 if ( tmp == 0 ) throw std::bad_cast();
80 return tmp;
81 }
82
83// polymorphic_downcast ----------------------------------------------------//
84
85 // BOOST_ASSERT() checked polymorphic downcast. Crosscasts prohibited.
86
87 // WARNING: Because this cast uses BOOST_ASSERT(), it violates
88 // the One Definition Rule if used in multiple translation units
89 // where BOOST_DISABLE_ASSERTS, BOOST_ENABLE_ASSERT_HANDLER
90 // NDEBUG are defined inconsistently.
91
92 // Contributed by Dave Abrahams
93
94 template <class Target, class Source>
95 inline Target polymorphic_downcast(Source* x BOOST_EXPLICIT_DEFAULT_TARGET)
96 {
97 BOOST_ASSERT( dynamic_cast<Target>(x) == x ); // detect logic error
98 return static_cast<Target>(x);
99 }
100
101# undef BOOST_EXPLICIT_DEFAULT_TARGET
102
103} // namespace boost
104
105# include <boost/numeric/conversion/cast.hpp>
106
107#endif // BOOST_CAST_HPP