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https://github.com/boostorg/conversion.git
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3 Commits
| Author | SHA1 | Date | |
|---|---|---|---|
 Antony Polukhin
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b74a4c34cb | ||
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Antony Polukhin
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452adac97f | ||
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Antony Polukhin
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5f82d5aa7d |
@@ -60,7 +60,7 @@ jobs:
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python tools/boostdep/depinst/depinst.py --include benchmark --include example --include examples --include tools --git_args "--depth 10 --jobs 3" $LIBRARY
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./bootstrap.sh
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./b2 -d0 headers
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./b2 -j4 variant=debug tools/inspect/build
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./b2 -j4 variant=debug tools/inspect
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- name: Run tests
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run: |
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@@ -5,8 +5,8 @@ Boost.Conversion is one of the [Boost C++ Libraries](https://github.com/boostorg
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@ | Build | Tests coverage | More info
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----------------|-------------- | -------------- |-----------
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Develop branch: | [](https://github.com/boostorg/conversion/actions/workflows/ci.yml) [](https://ci.appveyor.com/project/apolukhin/conversion/branch/develop) | [](https://coveralls.io/github/boostorg/conversion?branch=develop) | [details...](https://www.boost.org/development/tests/develop/developer/conversion.html)
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Master branch: | [](https://github.com/boostorg/conversion/actions/workflows/ci.yml) [](https://ci.appveyor.com/project/apolukhin/conversion/branch/master) | [](https://coveralls.io/github/boostorg/conversion?branch=master) | [details...](https://www.boost.org/development/tests/master/developer/conversion.html)
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Develop branch: | [](https://github.com/boostorg/conversion/actions/workflows/ci.yml) [](https://ci.appveyor.com/project/apolukhin/conversion/branch/develop) | [](https://coveralls.io/github/boostorg/conversion?branch=develop) | [details...](https://regression.boost.io/develop/developer/conversion.html)
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Master branch: | [](https://github.com/boostorg/conversion/actions/workflows/ci.yml) [](https://ci.appveyor.com/project/apolukhin/conversion/branch/master) | [](https://coveralls.io/github/boostorg/conversion?branch=master) | [details...](https://regression.boost.io/master/developer/conversion.html)
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[Latest developer documentation](https://www.boost.org/doc/libs/develop/doc/html/conversion.html)
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+3
-3
@@ -173,17 +173,17 @@ This includes C++ built-in pointers, `std::shared_ptr`,
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// Throws: std::bad_cast if ( dynamic_cast<Derived>(x) == 0 )
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// Returns: dynamic_cast<Derived>(x)
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template <class Derived, class Base>
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inline Derived polymorphic_cast(Base* x);
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constexpr Derived polymorphic_cast(Base* x);
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// Effects: assert( dynamic_cast<Derived>(x) == x );
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// Returns: static_cast<Derived>(x)
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template <class Derived, class Base>
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inline Derived polymorphic_downcast(Base* x);
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constexpr Derived polymorphic_downcast(Base* x);
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// Effects: assert( dynamic_cast<Derived>(&x) == &x );
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// Returns: static_cast<Derived>(x)
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template <class Derived, class Base>
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inline Derived polymorphic_downcast(Base& x);
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constexpr Derived polymorphic_downcast(Base& x);
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// Throws: std::bad_cast if ( dynamic_pointer_cast<Derived>(x) == 0 )
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// Returns: dynamic_pointer_cast<Derived>(x)
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@@ -14,7 +14,7 @@
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// 08 Nov 14 Add polymorphic_pointer_downcast (Boris Rasin)
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// 09 Jun 14 "cast.hpp" was renamed to "polymorphic_cast.hpp" and
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// inclusion of numeric_cast was removed (Antony Polukhin)
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// 23 Jun 05 numeric_cast removed and redirected to the new verion (Fernando Cacciola)
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// 23 Jun 05 numeric_cast removed and redirected to the new version (Fernando Cacciola)
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// 02 Apr 01 Removed BOOST_NO_LIMITS workarounds and included
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// <boost/limits.hpp> instead (the workaround did not
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// actually compile when BOOST_NO_LIMITS was defined in
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@@ -31,7 +31,7 @@
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// 19 Oct 00 Fix numeric_cast for floating-point types (Dave Abrahams)
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// 15 Jul 00 Suppress numeric_cast warnings for GCC, Borland and MSVC
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// (Dave Abrahams)
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// 30 Jun 00 More MSVC6 wordarounds. See comments below. (Dave Abrahams)
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// 30 Jun 00 More MSVC6 workarounds. See comments below. (Dave Abrahams)
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// 28 Jun 00 Removed implicit_cast<>. See comment below. (Beman Dawes)
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// 27 Jun 00 More MSVC6 workarounds
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// 15 Jun 00 Add workarounds for MSVC6
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@@ -62,6 +62,12 @@
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# include <typeinfo>
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# include <type_traits>
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#if defined(__cpp_constexpr) && __cpp_constexpr >= 201907L
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#define BOOST_CONVERSION_IMPL_CONSTEXPR_DYN_CAST constexpr
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#else
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#define BOOST_CONVERSION_IMPL_CONSTEXPR_DYN_CAST inline
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#endif
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namespace boost
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{
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// See the documentation for descriptions of how to choose between
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@@ -74,7 +80,7 @@ namespace boost
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// section 15.8 exercise 1, page 425.
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template <class Target, class Source>
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inline Target polymorphic_cast(Source* x)
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BOOST_CONVERSION_IMPL_CONSTEXPR_DYN_CAST Target polymorphic_cast(Source* x)
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{
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Target tmp = dynamic_cast<Target>(x);
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if ( tmp == 0 ) boost::throw_exception( std::bad_cast() );
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@@ -93,7 +99,7 @@ namespace boost
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// Contributed by Dave Abrahams
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template <class Target, class Source>
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inline Target polymorphic_downcast(Source* x)
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BOOST_CONVERSION_IMPL_CONSTEXPR_DYN_CAST Target polymorphic_downcast(Source* x)
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{
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BOOST_ASSERT( dynamic_cast<Target>(x) == x ); // detect logic error
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return static_cast<Target>(x);
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@@ -109,7 +115,7 @@ namespace boost
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// Contributed by Julien Delacroix
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template <class Target, class Source>
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inline typename std::enable_if<
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BOOST_CONVERSION_IMPL_CONSTEXPR_DYN_CAST typename std::enable_if<
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std::is_reference<Target>::value, Target
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>::type polymorphic_downcast(Source& x)
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{
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@@ -121,4 +127,6 @@ namespace boost
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} // namespace boost
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#undef BOOST_CONVERSION_IMPL_CONSTEXPR_DYN_CAST
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#endif // BOOST_POLYMORPHIC_CAST_HPP
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@@ -38,6 +38,48 @@ namespace
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};
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}
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constexpr bool compile_time_polymorphic_cast_check() {
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#if defined(__cpp_constexpr) && __cpp_constexpr >= 201907L
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Derived derived;
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Base* base = &derived;
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return polymorphic_cast<Derived*>(base) != nullptr;
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#endif
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return true;
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}
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static_assert(
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compile_time_polymorphic_cast_check(),
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"polymorphic_cast does not work at compile time"
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);
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constexpr bool compile_time_polymorphic_downcast_check() {
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#if defined(__cpp_constexpr) && __cpp_constexpr >= 201907L
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Derived derived;
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Base* base = &derived;
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return polymorphic_downcast<Derived*>(base) != nullptr;
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#endif
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return true;
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}
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static_assert(
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compile_time_polymorphic_downcast_check(),
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"polymorphic_downcast does not work at compile time"
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);
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constexpr bool compile_time_polymorphic_downcast2_check() {
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#if defined(__cpp_constexpr) && __cpp_constexpr >= 201907L
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Derived derived;
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Base& base = derived;
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Derived& derived_again = polymorphic_downcast<Derived&>(base);
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(void)derived_again;
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#endif
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return true;
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}
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static_assert(
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compile_time_polymorphic_downcast2_check(),
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"polymorphic_downcast does not work at compile time"
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);
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int main( int argc, char * argv[] )
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{
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