61 lines
2.1 KiB
Groff
61 lines
2.1 KiB
Groff
.\" Copyright (c) 2003 Hiten M. Pandya
|
|
.\"
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" This program is free software.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
|
|
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
.\"
|
|
.\" %FreeBSD: src/share/man/man9/CTASSERT.9,v 1.2 2003/05/30 21:13:32 ru Exp %
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.Dd May 15, 2003
|
|
.Os
|
|
.Dt CTASSERT 9
|
|
.Sh 名称
|
|
.Nm CTASSERT
|
|
.Nd コンパイル時のアサーションマクロ
|
|
.Sh 書式
|
|
.In sys/param.h
|
|
.In sys/systm.h
|
|
.Fn CTASSERT expression
|
|
.Sh 解説
|
|
.Fn CTASSERT
|
|
マクロは
|
|
.Fa expression
|
|
をコンパイル時に評価し、それが偽の場合にはコンパイラエラーを発生させます。
|
|
.Pp
|
|
.Fn CTASSERT
|
|
マクロは重要なデータ構造体または変数のサイズまたはアライメントを
|
|
コンパイル時にアサートするのに便利です。
|
|
これは実行時にコードを失敗させる事とは異なります。
|
|
.Sh 使用例
|
|
.Vt uuid
|
|
構造体の大きさが 16 バイトであることをアサートします。
|
|
.Pp
|
|
.Dl "CTASSERT(sizeof(struct uuid) == 16);"
|
|
.Sh 関連項目
|
|
.Xr KASSERT 9
|
|
.Sh 作者
|
|
このマニュアルページは
|
|
.An Hiten M. Pandya
|
|
.Aq hmp@FreeBSD.org
|
|
が書きました。
|