std::fpos<State>::state

 

C++

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streamoff

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fpos

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std::fpos

Member functions

fpos::state

 

State state() const;	(1)
void state( State st );	(2)

Manages the file position state.

1) Returns the value of the file position state

2) Replaces the file position state with the value of st.

For the specializations of std::fpos that are used in the standard library, State is always std::mbstate_t.

Parameters

st

-

new value for the state

Return value

1) the current value of the fpos state

2) (none)

Example

Run this code

#include <iostream>
#include <sstream>
#include <cwchar>
 
int main()
{
    std::istringstream s("test");
    std::mbstate_t st = s.tellg().state();
 
    if (std::mbsinit(&st))
        std::cout << "The stream is in the initial shift state\n";
}

Output:

The stream is in the initial shift state

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR	Applied to	Behavior as published	Correct behavior
LWG 441	C++98	overload (1) was not declared const (it is const in the synopsis)	added const

See also

mbstate_t

conversion state information necessary to iterate multibyte character strings (class)