diff options
Diffstat (limited to 'entity/concepts.hpp')
| -rw-r--r-- | entity/concepts.hpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/entity/concepts.hpp b/entity/concepts.hpp index e30a2c5e..871f6bbe 100644 --- a/entity/concepts.hpp +++ b/entity/concepts.hpp @@ -36,6 +36,8 @@ concept FieldWriter_memfn = requires(T& x, move_qualified<FieldType> value, F f) template<typename F, typename T, typename FieldType> concept FieldWriter_ptr = requires(T& x, move_qualified<FieldType> value, F f) { + requires std::is_reference_v<decltype(x.*f)>; + requires !std::is_const_v<std::remove_reference_t<decltype(x.*f)>>; { x.*f = value }; }; |