From 5307cbaa75272c27609533c0aa83350681f98351 Mon Sep 17 00:00:00 2001 From: Paolo Carlini Date: Sun, 24 Apr 2011 09:42:16 +0000 Subject: [PATCH] re PR other/48748 (Undocumented type traits used in libstdc++-4.6) 2011-04-24 Paolo Carlini PR other/48748 * doc/extend.texi (Type Traits): Document __is_standard_layout, __is_literal_type, and __is_trivial; update throughout about possibly cv-qualified void types. From-SVN: r172911 --- gcc/ChangeLog | 7 ++++++ gcc/doc/extend.texi | 57 ++++++++++++++++++++++++++++----------------- 2 files changed, 43 insertions(+), 21 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index da0b9a87d57..1f191ee2e18 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2011-04-24 Paolo Carlini + + PR other/48748 + * doc/extend.texi (Type Traits): Document __is_standard_layout, + __is_literal_type, and __is_trivial; update throughout about + possibly cv-qualified void types. + 2011-04-24 Gerald Pfeifer * doc/sourcebuild.texi (Ada Tests): Adjust reference to ACATS diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi index 67a4b1f8583..eddff9539d0 100644 --- a/gcc/doc/extend.texi +++ b/gcc/doc/extend.texi @@ -14305,63 +14305,63 @@ If @code{type} is const qualified or is a reference type then the trait is false. Otherwise if @code{__has_trivial_assign (type)} is true then the trait is true, else if @code{type} is a cv class or union type with copy assignment operators that are known not to throw an exception then the trait is true, -else it is false. Requires: @code{type} shall be a complete type, an array -type of unknown bound, or is a @code{void} type. +else it is false. Requires: @code{type} shall be a complete type, +(possibly cv-qualified) @code{void}, or an array of unknown bound. @item __has_nothrow_copy (type) If @code{__has_trivial_copy (type)} is true then the trait is true, else if @code{type} is a cv class or union type with copy constructors that are known not to throw an exception then the trait is true, else it is false. -Requires: @code{type} shall be a complete type, an array type of -unknown bound, or is a @code{void} type. +Requires: @code{type} shall be a complete type, (possibly cv-qualified) +@code{void}, or an array of unknown bound. @item __has_nothrow_constructor (type) If @code{__has_trivial_constructor (type)} is true then the trait is true, else if @code{type} is a cv class or union type (or array thereof) with a default constructor that is known not to throw an -exception then the trait is true, else it is false. Requires: -@code{type} shall be a complete type, an array type of unknown bound, -or is a @code{void} type. +exception then the trait is true, else it is false. Requires: +@code{type} shall be a complete type, (possibly cv-qualified) +@code{void}, or an array of unknown bound. @item __has_trivial_assign (type) If @code{type} is const qualified or is a reference type then the trait is false. Otherwise if @code{__is_pod (type)} is true then the trait is true, else if @code{type} is a cv class or union type with a trivial copy assignment ([class.copy]) then the trait is true, else it is -false. Requires: @code{type} shall be a complete type, an array type -of unknown bound, or is a @code{void} type. +false. Requires: @code{type} shall be a complete type, (possibly +cv-qualified) @code{void}, or an array of unknown bound. @item __has_trivial_copy (type) If @code{__is_pod (type)} is true or @code{type} is a reference type then the trait is true, else if @code{type} is a cv class or union type with a trivial copy constructor ([class.copy]) then the trait is true, else it is false. Requires: @code{type} shall be a complete -type, an array type of unknown bound, or is a @code{void} type. +type, (possibly cv-qualified) @code{void}, or an array of unknown bound. @item __has_trivial_constructor (type) If @code{__is_pod (type)} is true then the trait is true, else if @code{type} is a cv class or union type (or array thereof) with a trivial default constructor ([class.ctor]) then the trait is true, -else it is false. Requires: @code{type} shall be a complete type, an -array type of unknown bound, or is a @code{void} type. +else it is false. Requires: @code{type} shall be a complete +type, (possibly cv-qualified) @code{void}, or an array of unknown bound. @item __has_trivial_destructor (type) If @code{__is_pod (type)} is true or @code{type} is a reference type then the trait is true, else if @code{type} is a cv class or union type (or array thereof) with a trivial destructor ([class.dtor]) then the trait is true, else it is false. Requires: @code{type} shall be a complete -type, an array type of unknown bound, or is a @code{void} type. +type, (possibly cv-qualified) @code{void}, or an array of unknown bound. @item __has_virtual_destructor (type) If @code{type} is a class type with a virtual destructor ([class.dtor]) then the trait is true, else it is false. Requires: -@code{type} shall be a complete type, an array type of unknown bound, -or is a @code{void} type. +@code{type} shall be a complete type, (possibly cv-qualified) +@code{void}, or an array of unknown bound. @item __is_abstract (type) If @code{type} is an abstract class ([class.abstract]) then the trait is true, else it is false. Requires: @code{type} shall be a complete -type, an array type of unknown bound, or is a @code{void} type. +type, (possibly cv-qualified) @code{void}, or an array of unknown bound. @item __is_base_of (base_type, derived_type) If @code{base_type} is a base class of @code{derived_type} @@ -14386,22 +14386,37 @@ any, are bit-fields of length 0, and @code{type} has no virtual members, and @code{type} has no virtual base classes, and @code{type} has no base classes @code{base_type} for which @code{__is_empty (base_type)} is false. Requires: @code{type} shall -be a complete type, an array type of unknown bound, or is a -@code{void} type. +be a complete type, (possibly cv-qualified) @code{void}, or an array +of unknown bound. @item __is_enum (type) If @code{type} is a cv enumeration type ([basic.compound]) the trait is true, else it is false. +@item __is_literal_type (type) +If @code{type} is a literal type ([basic.types]) the trait is +true, else it is false. Requires: @code{type} shall be a complete type, +(possibly cv-qualified) @code{void}, or an array of unknown bound. + @item __is_pod (type) If @code{type} is a cv POD type ([basic.types]) then the trait is true, -else it is false. Requires: @code{type} shall be a complete type, -an array type of unknown bound, or is a @code{void} type. +else it is false. Requires: @code{type} shall be a complete type, +(possibly cv-qualified) @code{void}, or an array of unknown bound. @item __is_polymorphic (type) If @code{type} is a polymorphic class ([class.virtual]) then the trait is true, else it is false. Requires: @code{type} shall be a complete -type, an array type of unknown bound, or is a @code{void} type. +type, (possibly cv-qualified) @code{void}, or an array of unknown bound. + +@item __is_standard_layout (type) +If @code{type} is a standard-layout type ([basic.types]) the trait is +true, else it is false. Requires: @code{type} shall be a complete +type, (possibly cv-qualified) @code{void}, or an array of unknown bound. + +@item __is_trivial (type) +If @code{type} is a trivial type ([basic.types]) the trait is +true, else it is false. Requires: @code{type} shall be a complete +type, (possibly cv-qualified) @code{void}, or an array of unknown bound. @item __is_union (type) If @code{type} is a cv union type ([basic.compound]) the trait is -- 2.30.2