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dispatchkit: boxed_value: Fix noexcept warning for Data ctor

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Using gcc 13.3.0 I get many warnings like the following:

```
In file included from .../include/c++/13.3.0/bits/stl_iterator.h:85,
                 from .../include/c++/13.3.0/bits/stl_algobase.h:67,
                 from .../include/c++/13.3.0/bits/stl_tree.h:63,
                 from .../include/c++/13.3.0/map:62,
                 from .../ChaiScript/static_libs/../include/chaiscript/chaiscript_stdlib.hpp:10,
                 from .../ChaiScript/static_libs/chaiscript_stdlib.cpp:1:
.../include/c++/13.3.0/bits/stl_construct.h: In instantiation of ‘constexpr decltype (::new(void*(0)) _Tp) std::construct_at(_Tp*, _Args&& ...) [with _Tp = chaiscript::Boxed_Value::Data; _Args = {chaiscript::Type_Info, chaiscript::detail::Any, bool, std::nullptr_t, bool&}; decltype (::new(void*(0)) _Tp) = chaiscript::Boxed_Value::Data*]’:
.../include/c++/13.3.0/bits/stl_construct.h:115:21:   required from ‘constexpr void std::_Construct(_Tp*, _Args&& ...) [with _Tp = chaiscript::Boxed_Value::Data; _Args = {chaiscript::Type_Info, chaiscript::detail::Any, bool, std::nullptr_t, bool&}]’
.../include/c++/13.3.0/bits/alloc_traits.h:661:19:   required from ‘static constexpr void std::allocator_traits<std::allocator<void> >::construct(allocator_type&, _Up*, _Args&& ...) [with _Up = chaiscript::Boxed_Value::Data; _Args = {chaiscript::Type_Info, chaiscript::detail::Any, bool, std::nullptr_t, bool&}; allocator_type = std::allocator<void>]’
.../include/c++/13.3.0/bits/shared_ptr_base.h:604:39:   required from ‘std::_Sp_counted_ptr_inplace<_Tp, _Alloc, _Lp>::_Sp_counted_ptr_inplace(_Alloc, _Args&& ...) [with _Args = {chaiscript::Type_Info, chaiscript::detail::Any, bool, std::nullptr_t, bool&}; _Tp = chaiscript::Boxed_Value::Data; _Alloc = std::allocator<void>; __gnu_cxx::_Lock_policy _Lp = __gnu_cxx::_S_atomic]’
.../include/c++/13.3.0/bits/shared_ptr_base.h:971:16:   required from ‘std::__shared_count<_Lp>::__shared_count(_Tp*&, std::_Sp_alloc_shared_tag<_Alloc>, _Args&& ...) [with _Tp = chaiscript::Boxed_Value::Data; _Alloc = std::allocator<void>; _Args = {chaiscript::Type_Info, chaiscript::detail::Any, bool, std::nullptr_t, bool&}; __gnu_cxx::_Lock_policy _Lp = __gnu_cxx::_S_atomic]’
.../include/c++/13.3.0/bits/shared_ptr_base.h:1712:14:   required from ‘std::__shared_ptr<_Tp, _Lp>::__shared_ptr(std::_Sp_alloc_shared_tag<_Tp>, _Args&& ...) [with _Alloc = std::allocator<void>; _Args = {chaiscript::Type_Info, chaiscript::detail::Any, bool, std::nullptr_t, bool&}; _Tp = chaiscript::Boxed_Value::Data; __gnu_cxx::_Lock_policy _Lp = __gnu_cxx::_S_atomic]’
.../include/c++/13.3.0/bits/shared_ptr.h:464:59:   required from ‘std::shared_ptr<_Tp>::shared_ptr(std::_Sp_alloc_shared_tag<_Tp>, _Args&& ...) [with _Alloc = std::allocator<void>; _Args = {chaiscript::Type_Info, chaiscript::detail::Any, bool, std::nullptr_t, bool&}; _Tp = chaiscript::Boxed_Value::Data]’
.../include/c++/13.3.0/bits/shared_ptr.h:1009:14:   required from ‘std::shared_ptr<std::_NonArray<_Tp> > std::make_shared(_Args&& ...) [with _Tp = chaiscript::Boxed_Value::Data; _Args = {chaiscript::Type_Info, chaiscript::detail::Any, bool, std::nullptr_t, bool&}; _NonArray<_Tp> = chaiscript::Boxed_Value::Data]’
.../ChaiScript/static_libs/../include/chaiscript/language/../dispatchkit/boxed_value.hpp:74:38:   required from here
.../include/c++/13.3.0/bits/stl_construct.h:95:14: warning: noexcept-expression evaluates to ‘false’ because of a call to ‘chaiscript::Boxed_Value::Data::Data(const chaiscript::Type_Info&, chaiscript::detail::Any, bool, const void*, bool)’ [-Wnoexcept]
   95 |     noexcept(noexcept(::new((void*)0) _Tp(std::declval<_Args>()...)))
      |              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from .../ChaiScript/static_libs/../include/chaiscript/language/chaiscript_common.hpp:21,
                 from .../ChaiScript/static_libs/../include/chaiscript/chaiscript_stdlib.hpp:17:
.../ChaiScript/static_libs/../include/chaiscript/language/../dispatchkit/boxed_value.hpp:34:7: note: but ‘chaiscript::Boxed_Value::Data::Data(const chaiscript::Type_Info&, chaiscript::detail::Any, bool, const void*, bool)’ does not throw; perhaps it should be declared ‘noexcept’
   34 |       Data(const Type_Info &ti, chaiscript::detail::Any to, bool is_ref, const void *t_void_ptr, bool t_return_value)
      |       ^~~~
/
```

Fix this by adding a noexcept like the warning suggests.
This commit is contained in:
Clemens Terasa 2025-02-19 19:13:18 +01:00
parent 406a7ba1ef
commit 681104b68f
1 changed files with 1 additions and 1 deletions
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2
include/chaiscript/dispatchkit/boxed_value.hpp
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@ -31,7 +31,7 @@ namespace chaiscript {
/// structure which holds the internal state of a Boxed_Value
/// \todo Get rid of Any and merge it with this, reducing an allocation in the process
struct Data {
Data(const Type_Info &ti, chaiscript::detail::Any to, bool is_ref, const void *t_void_ptr, bool t_return_value)
Data(const Type_Info &ti, chaiscript::detail::Any to, bool is_ref, const void *t_void_ptr, bool t_return_value) noexcept
: m_type_info(ti)
, m_obj(std::move(to))
, m_data_ptr(ti.is_const() ? nullptr : const_cast<void *>(t_void_ptr))