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[meta] Add is_trivially_destructible

This commit is contained in:
Behdad Esfahbod 2019-05-10 21:59:57 -07:00
parent 72cb5b8e52
commit f2398f34c0
2 changed files with 8 additions and 5 deletions
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6
src/hb-meta.hh
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@ -344,9 +344,9 @@ using hb_is_move_assignable = hb_is_assignable<hb_add_lvalue_reference<T>,
template <typename T> union hb_trivial { T value; }; template <typename T> union hb_trivial { T value; };
/* Don't know how to do the following. */ /* Don't know how to do the following. */
//template <typename T> template <typename T>
//using hb_is_trivially_destructible= hb_is_destructible<hb_trivial<T>>; using hb_is_trivially_destructible= hb_is_destructible<hb_trivial<T>>;
//#define hb_is_trivially_destructible(T) hb_is_trivially_destructible<T>::value #define hb_is_trivially_destructible(T) hb_is_trivially_destructible<T>::value
/* Don't know how to do the following. */ /* Don't know how to do the following. */
//template <typename T, typename ...Ts> //template <typename T, typename ...Ts>

7
src/test-meta.cc
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@ -27,6 +27,8 @@
#include "hb.hh" #include "hb.hh"
#include "hb-meta.hh" #include "hb-meta.hh"
#include <type_traits>
int int
main (int argc, char **argv) main (int argc, char **argv)
{ {
@ -57,6 +59,7 @@ main (int argc, char **argv)
static_assert (hb_is_convertible (const int&, const int), ""); static_assert (hb_is_convertible (const int&, const int), "");
struct X {}; struct X {};
struct Y : X {};
static_assert (hb_is_convertible (const X &, const X), ""); static_assert (hb_is_convertible (const X &, const X), "");
static_assert (hb_is_convertible (X &, const X), ""); static_assert (hb_is_convertible (X &, const X), "");
@ -77,8 +80,6 @@ main (int argc, char **argv)
static_assert (hb_is_convertible (int *, void *), ""); static_assert (hb_is_convertible (int *, void *), "");
static_assert (!hb_is_convertible (void *, int *), ""); static_assert (!hb_is_convertible (void *, int *), "");
struct Y : X {};
static_assert (hb_is_base_of (void, void), ""); static_assert (hb_is_base_of (void, void), "");
static_assert (hb_is_base_of (void, int), ""); static_assert (hb_is_base_of (void, int), "");
static_assert (!hb_is_base_of (int, void), ""); static_assert (!hb_is_base_of (int, void), "");
@ -112,6 +113,8 @@ main (int argc, char **argv)
static_assert (hb_is_trivially_copy_constructible (Y), ""); static_assert (hb_is_trivially_copy_constructible (Y), "");
static_assert (hb_is_trivially_move_constructible (X), ""); static_assert (hb_is_trivially_move_constructible (X), "");
static_assert (hb_is_trivially_move_constructible (Y), ""); static_assert (hb_is_trivially_move_constructible (Y), "");
static_assert (hb_is_trivially_destructible (Y), "");
/* TODO Add more meaningful tests. */ /* TODO Add more meaningful tests. */
return 0; return 0;