strstreambuf::freeze

导致流缓冲区不可用通过流缓冲区操作。

void freeze(
   bool _Freezeit = true
);

参数

• _Freezeit
  指示您是否为 bool 希望流冻结。

备注

如果 _Freezeit 为true，该函数修改存储的 strstreambuf 模式进行冻结的控件序列。否则，它使未冻结的控件序列。

str 提示 freeze。

说明
冻结的缓冲区不会在 strstreambuf 损坏时被释放。它会释放避免内存泄漏之前，必须解冻缓冲区。

示例

// strstreambuf_freeze.cpp
// compile with: /EHsc

#include <iostream>
#include <strstream>

using namespace std;

void report(strstream &x)
{
    if (!x.good())
        cout << "stream bad" << endl;
    else
        cout << "stream good" << endl;
}

int main()
{
    strstream x;

    x << "test1";
    cout << "before freeze: ";
    report(x);

    // Calling str freezes stream.
    cout.write(x.rdbuf()->str(), 5) << endl;
    cout << "after freeze: ";
    report(x);

    // Stream is bad now, wrote on frozen stream
    x << "test1.5";
    cout << "after write to frozen stream: ";
    report(x);

    // Unfreeze stream, but it is still bad
    x.rdbuf()->freeze(false);
    cout << "after unfreezing stream: ";
    report(x);

    // Clear stream
    x.clear();
    cout << "after clearing stream: ";
    report(x);

    x << "test3";
    cout.write(x.rdbuf()->str(), 10) << endl;

    // Clean up.  Failure to unfreeze stream will cause a
    // memory leak.
    x.rdbuf()->freeze(false);
}

要求

标头: <strstream>

命名空间: std

请参见

参考

strstreambuf Class

iostream编程

(mfc)约定