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assert

提供: cppreference.com
< cpp‎ | error

 
 
ユーティリティライブラリ
支援を入力します (basic types, RTTI, type traits)
動的なメモリ管理
エラー処理
プログラムユーティリティ
可変個引数関数
日付と時刻
関数オブジェクト
initializer_list(C++11)
bitset
hash(C++11)
関係演算子
Original:
Relational operators
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rel_ops::operator!=
rel_ops::operator>
rel_ops::operator<=
rel_ops::operator>=
ペアとタプル
Original:
Pairs and tuples
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pair
tuple(C++11)
piecewise_construct_t(C++11)
piecewise_construct(C++11)
フォワード、スワップ、および移動
Original:
Swap, forward and move
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swap
forward(C++11)
move(C++11)
move_if_noexcept(C++11)
declval(C++11)
 
エラー処理
例外処理
Original:
Exception handling
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exception
uncaught_exception
exception_ptr(C++11)
make_exception_ptr(C++11)
current_exception(C++11)
rethrow_exception(C++11)
nested_exception(C++11)
throw_with_nested(C++11)
rethrow_if_nested(C++11)
例外処理の失敗
Original:
Exception handling failures
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terminate
terminate_handler
get_terminate(C++11)
set_terminate
unexpected(廃止予定)
bad_exception
unexpected_handler(廃止予定)
get_unexpected(C++11)(廃止予定)
set_unexpected(廃止予定)
例外カテゴリ
Original:
Exception categories
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logic_error
invalid_argument
domain_error
length_error
out_of_range
runtime_error
range_error
overflow_error
underflow_error
エラーコード
Original:
Error codes
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エラーコード
errno
アサーション
Original:
Assertions
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assert
SYSTEM_ERROR施設
Original:
system_error facility
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error_category(C++11)
generic_category(C++11)
system_category(C++11)
error_condition(C++11)
errc(C++11)
error_code(C++11)
system_error(C++11)
 
Defined in header <cassert>
#ifdef NDEBUG

#define assert(condition) ((void)0)
#else
#define assert(condition) /*implementation defined*/

#endif
マクロassertの定義は、標準ライブラリで定義されていない別のマクロ、NDEBUGに依存.
Original:
The definition of the macro assert depends on another macro, NDEBUG, which is not defined by the standard library.
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NDEBUG<cassert>が含まれているソース·コード内の時点でマクロ名として定義されている場合、assertは何もしません.
Original:
If NDEBUG is defined as a macro name at the point in the source code where <cassert> is included, then assert does nothing.
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NDEBUGが定義されていない場合、その後assertチェックはその引数が(これは、スカラ型でなければなりません)がゼロに等しい場合。その場合は、assert標準エラー出力に実装固有の診断情報を出力し、std::abort呼び出します。診断情報がexpressionのテキストだけでなく、標準的なマクロ__FILE____LINE__、標準変数__func__の値を含むように要求される.
Original:
If NDEBUG is not defined, then assert checks if its argument (which must have scalar type) compares equal to zero. If it does, assert outputs implementation-specific diagnostic information on the standard error output and calls std::abort. The diagnostic information is required to include the text of expression, as well as the values of the standard macros __FILE__, __LINE__, and the standard variable __func__.
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目次

[編集] パラメータ

condition -
スカラー型の式
Original:
expression of scalar type
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[編集] 値を返します

(なし)
Original:
(none)
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[編集]

#include <iostream>
// uncomment to disable assert()
// #define NDEBUG
#include <cassert>
 
int main()
{
    assert(2+2==4);
    std::cout << "Execution continues past the first assert\n";
    assert(2+2==5);
    std::cout << "Execution continues past the second assert\n";
}

Output:

Execution continues past the first assert
test: test.cc:8: int main(): Assertion `2+2==5' failed.
Aborted

[編集] も参照してください

静的なアサーション
(C + + 11以来)をチェックコンパイル時アサーションを実行します
Original:
performs compile-time assertion checking (C + + 11以来)
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[edit]
(清掃なし)プログラムの異常終了が発生します
Original:
causes abnormal program termination (without cleaning up)
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(機能) [edit]