diff options
| author | Lars Knoll <lars.knoll@qt.io> | 2020-06-05 21:01:29 +0200 |
|---|---|---|
| committer | Lars Knoll <lars.knoll@qt.io> | 2020-07-08 14:13:56 +0200 |
| commit | 0e2cfdedf261a9d29d7466bd26545549479d9f8a (patch) | |
| tree | 8c6b3eaaad7463bf2e019b0694286aa065544138 /src/corelib/global | |
| parent | 16bc995fd1eba4f7485226f319e7736ca19040bc (diff) | |
Constrain the comparison operators for our container classes
This had already been in very few places, where we ran into issues with
this before. More generic constraints here will significantly reduce the
amount of error messages a user has to parse in case he tries to instantiate
an operator by accident (or with a lacking comparison operator for one of
it's template arguments).
Change-Id: I1521d19c55d99732d9742402bd534c390a8e4242
Reviewed-by: Paul Wicking <paul.wicking@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Diffstat (limited to 'src/corelib/global')
| -rw-r--r-- | src/corelib/global/qtypeinfo.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/corelib/global/qtypeinfo.h b/src/corelib/global/qtypeinfo.h index 8b31fb4a81..9b85a41266 100644 --- a/src/corelib/global/qtypeinfo.h +++ b/src/corelib/global/qtypeinfo.h @@ -432,6 +432,11 @@ struct has_operator_less_than : detail::expand_operator_less_than<T> {}; template<typename T> constexpr bool has_operator_less_than_v = has_operator_less_than<T>::value; +template <typename ...T> +using compare_eq_result = std::enable_if_t<std::conjunction_v<QTypeTraits::has_operator_equal<T>...>, bool>; + +template <typename ...T> +using compare_lt_result = std::enable_if_t<std::conjunction_v<QTypeTraits::has_operator_less_than<T>...>, bool>; } |