On Sat, Oct 24, 2020 at 02:32:37AM +0300, Ville Voutilainen via Gcc-patches
wrote:
> Finishing testing on Linux-PPC64. Ok for trunk if tests pass?
>
> 2020-10-24 Ville Voutilainen <[email protected]>
>
> gcc/c-family/ChangeLog:
>
> Implement __is_nothrow_{constructible,assignable}
> * c-common.c (__is_nothrow_assignable): New.
> (__is_nothrow_constructible): Likewise.
> * c-common.h (RID_IS_NOTHROW_ASSIGNABLE): New.
> (RID_IS_NOTHROW_CONSTRUCTIBLE): Likewise.
>
> gcc/cp/ChangeLog:
>
> Implement __is_nothrow_{constructible,assignable}
> * cp-tree.h (CPTK_IS_NOTHROW_ASSIGNABLE): New.
> (CPTK_IS_NOTHROW_CONSTRUCTIBLE): Likewise.
> (is_nothrow_xible): Likewise.
> * method.c (__is_nothrow_xible): New.
> * parser.c (cp_parser_primary_expression): Handle the new RID_*.
> (cp_parser_trait_expr): Likewise.
> * semantics.c (trait_expr_value): Handle the new RID_*.
> (finish_trait_expr): Likewise.
>
> libstdc++-v3/ChangeLog:
>
> Implement __is_nothrow_{constructible,assignable}
> * include/std/type_traits (__is_nt_constructible_impl): Remove.
> (__is_nothrow_constructible_impl): Adjust.
> (is_nothrow_default_constructible): Likewise.
> (__is_nt_assignable_impl): Remove.
> (__is_nothrow_assignable_impl): Adjust.
> diff --git a/gcc/c-family/c-common.c b/gcc/c-family/c-common.c
> index e16ca3894bc..098a36e4d67 100644
> --- a/gcc/c-family/c-common.c
> +++ b/gcc/c-family/c-common.c
> @@ -527,6 +527,8 @@ const struct c_common_resword c_common_reswords[] =
> { "while", RID_WHILE, 0 },
> { "__is_assignable", RID_IS_ASSIGNABLE, D_CXXONLY },
> { "__is_constructible", RID_IS_CONSTRUCTIBLE, D_CXXONLY },
> + { "__is_nothrow_assignable", RID_IS_NOTHROW_ASSIGNABLE, D_CXXONLY },
> + { "__is_nothrow_constructible", RID_IS_NOTHROW_CONSTRUCTIBLE, D_CXXONLY },
>
> /* C++ transactional memory. */
> { "synchronized", RID_SYNCHRONIZED, D_CXX_OBJC | D_TRANSMEM },
> diff --git a/gcc/c-family/c-common.h b/gcc/c-family/c-common.h
> index 3d96092a297..24a4a8e7fe3 100644
> --- a/gcc/c-family/c-common.h
> +++ b/gcc/c-family/c-common.h
> @@ -176,6 +176,7 @@ enum rid
> RID_IS_TRIVIALLY_COPYABLE,
> RID_IS_UNION, RID_UNDERLYING_TYPE,
> RID_IS_ASSIGNABLE, RID_IS_CONSTRUCTIBLE,
> + RID_IS_NOTHROW_ASSIGNABLE, RID_IS_NOTHROW_CONSTRUCTIBLE,
>
> /* C++11 */
> RID_CONSTEXPR, RID_DECLTYPE, RID_NOEXCEPT, RID_NULLPTR, RID_STATIC_ASSERT,
> diff --git a/gcc/cp/cp-tree.h b/gcc/cp/cp-tree.h
> index 5c06ac3789e..1ce20989e13 100644
> --- a/gcc/cp/cp-tree.h
> +++ b/gcc/cp/cp-tree.h
> @@ -1323,7 +1323,9 @@ enum cp_trait_kind
> CPTK_IS_UNION,
> CPTK_UNDERLYING_TYPE,
> CPTK_IS_ASSIGNABLE,
> - CPTK_IS_CONSTRUCTIBLE
> + CPTK_IS_CONSTRUCTIBLE,
> + CPTK_IS_NOTHROW_ASSIGNABLE,
> + CPTK_IS_NOTHROW_CONSTRUCTIBLE
> };
>
> /* The types that we are processing. */
> @@ -6752,6 +6754,7 @@ extern void use_thunk (tree,
> bool);
> extern bool trivial_fn_p (tree);
> extern tree forward_parm (tree);
> extern bool is_trivially_xible (enum tree_code, tree,
> tree);
> +extern bool is_nothrow_xible (enum tree_code, tree, tree);
> extern bool is_xible (enum tree_code, tree, tree);
> extern tree get_defaulted_eh_spec (tree, tsubst_flags_t =
> tf_warning_or_error);
> extern bool maybe_explain_implicit_delete (tree);
> diff --git a/gcc/cp/method.c b/gcc/cp/method.c
> index 6e4c5f7e83b..2ffc86cbd81 100644
> --- a/gcc/cp/method.c
> +++ b/gcc/cp/method.c
> @@ -1933,6 +1933,21 @@ is_trivially_xible (enum tree_code code, tree to, tree
> from)
> return !nt;
> }
>
> +/* Returns true iff TO is nothrow assignable (if CODE is MODIFY_EXPR) or
> + constructible (otherwise) from FROM, which is a single type for
> + assignment or a list of types for construction. */
> +
> +bool
> +is_nothrow_xible (enum tree_code code, tree to, tree from)
> +{
> + tree expr;
> + expr = is_xible_helper (code, to, from, /*trivial*/false);
tree expr = is_xible_helper (code, to, from, /*trivial*/false);
would be nicer, otherwise the front-end changes look fine, thanks.
Marek
