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unique_ptr and make_unique
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@ -130,6 +130,9 @@ AC_C_BIGENDIAN
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# Nice to have when an assertion triggers
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LYX_CHECK_CALLSTACK_PRINTING
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# C++14 only
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LYX_CHECK_DEF(make_unique, memory, [using std::make_unique;])
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# Needed for our char_type
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AC_CHECK_SIZEOF(wchar_t)
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@ -106,6 +106,7 @@ liblyxsupport_a_SOURCES = \
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trivstring.cpp \
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trivstring.h \
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types.h \
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unique_ptr.h \
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userinfo.cpp \
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userinfo.h \
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unicode.cpp \
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74
src/support/unique_ptr.h
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74
src/support/unique_ptr.h
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@ -0,0 +1,74 @@
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// -*- C++ -*-
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/**
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* \file unique_ptr.h
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Guillaume Munch
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*
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* Full author contact details are available in file CREDITS.
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*/
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#ifndef LYX_UNIQUE_PTR_H
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#define LYX_UNIQUE_PTR_H
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#include <memory>
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namespace lyx { using std::unique_ptr; }
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/// Define lyx::make_unique() across platforms
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#ifdef HAVE_DEF_MAKE_UNIQUE
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namespace lyx { using std::make_unique; }
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#else
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// For all other compilers:
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// using https://isocpp.org/files/papers/N3656.txt
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#include <cstddef>
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#include <type_traits>
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#include <utility>
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namespace lyx {
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namespace {
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template<class T> struct _Unique_if {
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typedef unique_ptr<T> _Single_object;
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};
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template<class T> struct _Unique_if<T[]> {
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typedef unique_ptr<T[]> _Unknown_bound;
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};
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template<class T, size_t N> struct _Unique_if<T[N]> {
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typedef void _Known_bound;
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};
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} //anon namespace
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template<class T, class... Args>
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typename _Unique_if<T>::_Single_object
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make_unique(Args&&... args) {
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return unique_ptr<T>(new T(std::forward<Args>(args)...));
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}
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template<class T>
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typename _Unique_if<T>::_Unknown_bound
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make_unique(size_t n) {
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typedef typename std::remove_extent<T>::type U;
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return unique_ptr<T>(new U[n]());
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}
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template<class T, class... Args>
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typename _Unique_if<T>::_Known_bound
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make_unique(Args&&...) = delete;
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} // namespace lyx
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#endif // definition of make_unique
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#endif // LYX_UNIQUE_PTR_H
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