operator<<,>>(std::subtract_with_carry_engine)
|
template
<
class CharT, class Traits >
friend
std::basic_ostream
<CharT, Traits>
&
|
(1) | (since C++11) |
|
template
<
class CharT, class Traits >
friend
std::basic_istream
<CharT, Traits>
&
|
(2) | (since C++11) |
- If text was not previously written using an output stream pr, the behavior is undefined.
- Otherwise, if any of the following values is false, the behavior is undefined:
-
- is.getloc() == pr.getloc()
-
std::is_same
<decltype(is)
::
char_type
decltype(pr) :: char_type > :: value -
std::is_same
<decltype(is)
::
traits_type
decltype(pr) :: traits_type > :: value
- Otherwise, if text is not a valid textual representation of any state of decltype(e), the state of e is unchanged and is.setstate ( std::ios_base::failbit )
- Otherwise, given another engine eng of the same type as e. If text was previously written by pr << eng and there is no intervening invocations of e or of eng between pr << eng and is >> e, e == eng is true
These function templates are not visible to ordinary unqualified or qualified lookup, and can only be found by argument-dependent lookup when decltype(e)
Parameters
| os | - | output stream to insert the data to |
| is | - | input stream to extract the data from |
| e | - | pseudo-random number engine |
Return value
Complexity
Exceptions
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 3519 | C++11 | the form of insertion and extraction operators were unspecified | specified to be hidden friends |