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| author | Max Kellermann <max@duempel.org> | 2014-07-14 16:44:17 +0200 |
|---|---|---|
| committer | Max Kellermann <max@duempel.org> | 2014-07-14 17:08:57 +0200 |
| commit | d8558a3af333ee02603a4a07c5bc7031d624f72b (patch) | |
| tree | af5978c6edd777a889b1b0443830e8317f0cce2d /src | |
| parent | 72eedb1c98a02aac3b08cc58b92018a4cd42d5fc (diff) | |
| download | mpd-d8558a3af333ee02603a4a07c5bc7031d624f72b.tar.gz mpd-d8558a3af333ee02603a4a07c5bc7031d624f72b.tar.xz mpd-d8558a3af333ee02603a4a07c5bc7031d624f72b.zip | |
util/Cast: add "const" overload
Diffstat (limited to 'src')
| -rw-r--r-- | src/util/Cast.hxx | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/util/Cast.hxx b/src/util/Cast.hxx index c49d18eaa..887137da4 100644 --- a/src/util/Cast.hxx +++ b/src/util/Cast.hxx @@ -93,4 +93,17 @@ ContainerCast(A &a, A C::*member) return *OffsetCast<C, A>(&a, ContainerAttributeOffset<C, A>(member)); } +/** + * Cast the given pointer to a struct member to its parent structure. + */ +template<class C, class A> +#if defined(__clang__) || GCC_CHECK_VERSION(4,7) +constexpr +#endif +static inline const C & +ContainerCast(const A &a, A C::*member) +{ + return *OffsetCast<const C, const A>(&a, ContainerAttributeOffset<C, A>(member)); +} + #endif |