C ++ライブラリ-<basic_istream>
前書き
入力ストリームオブジェクトが文字のシーケンスから入力を読み取って解釈できるようにするために使用されます。 これらの入力操作を実行するための特定のメンバーが提供されます。
標準オブジェクトcinおよびwcinは、このクラステンプレートの特定のインスタンス化を使用します。
定義
- 以下はstd
- basic_istreamの定義です。
template <class charT, class traits = char_traits<charT>>
class basic_istream;
パラメーター
- charT -文字タイプ。
- traits -ストリームオブジェクトで使用される文字の基本的なプロパティを定義する文字特性クラス。
メンバーの種類
| Sr.No.
|
Member types
|
Definition
|
| 1
|
event
|
Type to indicate event type
|
| 2
|
event_callback
|
Event callback function type
|
| 3
|
failure
|
Base class for stream exceptions
|
| 4
|
fmtflags
|
Type for stream format flags
|
| 5
|
Init
|
Initialize standard stream objects
|
| 6
|
iostate
|
Type for stream state flags
|
| 7
|
openmode
|
Type for stream opening mode flags
|
| 8
|
seekdir
|
Type for stream seeking direction flag
|
パブリックメンバー関数
| Sr.No.
|
Member types
|
Definition
|
| 1
|
(constructor)
|
Construct object (public member function )
|
| 2
|
(destructor)
|
Destruct object (public member function )
|
書式付き入力
| Sr.No.
|
Input
|
Definition
|
| 1
|
input
|
Extract formatted input
|
書式なし入力
| Sr.No.
|
Input
|
Definition
|
| 1
|
gcount
|
It is used to get character count
|
| 2
|
get
|
It is used to get characters
|
| 3
|
getline
|
It is used to get line
|
| 4
|
ignore
|
It is used to extract and discard characters
|
| 5
|
peek
|
It is used to peek next character
|
| 6
|
read
|
It is used to read block of data
|
| 7
|
readsome
|
It is used to Read data available in buffer
|
| 8
|
putback
|
It is used to put character back
|
| 9
|
unget
|
It is used to unget character
|
ポジショニング
| Sr.No.
|
Position
|
Definition
|
| 1
|
tellg
|
It is used to get position in input sequence
|
| 2
|
seekg
|
It is used to set position in input sequence
|
同期
| Sr.No.
|
Synchronization
|
Definition
|
| 1
|
sync
|
It is used to synchronize input buffer
|
保護されたメンバー関数
状態フラグ関数
| Sr.No.
|
Member types
|
Definition
|
| 1
|
good
|
It is used to check whether state of stream is good
|
| 2
|
eof
|
It is used to check whether eofbit is set
|
| 3
|
fail
|
It is used to check whether either failbit or badbit is set
|
| 4
|
bad
|
It is used to check whether badbit is set
|
| 5
|
operator!
|
Evaluate stream
|
| 6
|
rdstate
|
It is used to get error state flags
|
| 7
|
setstate
|
It is used to set error state flag
|
| 8
|
clear
|
It is used to set error state flag
|
| 9
|
fill
|
Get/set fill character
|
| 10
|
exceptions
|
It is used to get/set exceptions mask
|
| 11
|
imbue
|
Imbue locale
|
| 12
|
tie
|
It is used to get/set tied stream
|
| 13
|
rdbuf
|
It is used to get/set stream buffer
|
| 14
|
narrow
|
Narrow character
|
| 15
|
widen
|
Widen character
|
