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static_visitor: Make destructor public

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otherwise in C++ 17 mode Clang 8 will complain about the
protected destructor:

```
main.cpp:16:33: error: temporary of type 'boost::static_visitor<>' has protected destructor
    boost::apply_visitor(output{}, v);
                                ^
/usr/local/opt/boost/include/boost/variant/static_visitor.hpp:53:5: note: declared protected here
    ~static_visitor() = default;
    ^
```

See also discussion in https://reviews.llvm.org/D53860
This commit is contained in:
Gregor Jasny
2019-03-09 15:25:03 +01:00
parent d069511e31
commit dd728220b0
1 changed files with 0 additions and 2 deletions
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2
include/boost/variant/static_visitor.hpp
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@@ -50,10 +50,8 @@ public: // typedefs
protected: // for use as base class only
#if !defined(BOOST_NO_CXX11_DEFAULTED_FUNCTIONS) && !defined(BOOST_NO_CXX11_NON_PUBLIC_DEFAULTED_FUNCTIONS)
static_visitor() = default;
~static_visitor() = default;
#else
static_visitor() BOOST_NOEXCEPT { }
~static_visitor() BOOST_NOEXCEPT { }
#endif
};