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Fix compilation on C++20 mode

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MSVC standard library has removed std::not1, thus use the C++17 alternative if available
This commit is contained in:
Jean-Michaël Celerier
2020-12-14 12:08:04 +01:00
parent e4e12158e7
commit bbc499708c
1 changed files with 8 additions and 1 deletions
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include/boost/graph/transitive_closure.hpp
+8 -1
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@@ -158,9 +158,16 @@ void transitive_closure(const Graph& g, GraphTC& tc,
{
chain.push_back(v);
in_a_chain[v] = true;
typename std::vector< cg_vertex >::const_iterator next
#ifdef __cpp_lib_not_fn
= std::find_if(CG_vec[v].begin(), CG_vec[v].end(),
std::not1(detail::subscript(in_a_chain)));
std::not_fn(detail::subscript(in_a_chain)));
#else
= std::find_if(CG_vec[v].begin(), CG_vec[v].end(),
std::not1(detail::subscript(in_a_chain)));
#endif
if (next != CG_vec[v].end())
v = *next;
else