diff options
Diffstat (limited to 'gcc/vec.h')
| -rw-r--r-- | gcc/vec.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/gcc/vec.h b/gcc/vec.h index b8e6270149f..bfc1811f651 100644 --- a/gcc/vec.h +++ b/gcc/vec.h @@ -510,6 +510,17 @@ class GTY((user)) vec { }; +/* Type to provide NULL values for vec<T, A, L>. This is used to + provide nil initializers for vec instances. Since vec must be + a POD, we cannot have proper ctor/dtor for it. To initialize + a vec instance, you can assign it the value vNULL. */ +struct vnull +{ + template <typename T, typename A, typename L> + operator vec<T, A, L> () { return vec<T, A, L>(); } +}; +extern vnull vNULL; + /* Embeddable vector. These vectors are suitable to be embedded in other data structures so that they can be pre-allocated in a @@ -1432,7 +1443,7 @@ template<typename T, typename A> inline vec<T, A, vl_ptr> vec<T, A, vl_ptr>::copy (ALONE_MEM_STAT_DECL) const { - vec<T, A, vl_ptr> new_vec = vec<T, A, vl_ptr>(); + vec<T, A, vl_ptr> new_vec = vNULL; if (length ()) new_vec.vec_ = vec_->copy (); return new_vec; |
