std::subtract_with_carry_engine<UIntType,w,s,r>:: seed

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std::subtract_with_carry_engine
void seed ( result_type value = 0u ) ;
(1) (since C++11)
template < class SeedSeq >
void seed ( SeedSeq & seq ) ;
(2) (since C++11)

Sets the state of the random-number engine.

1) Right after the state is set, * this == std:: subtract_with_carry_engine ( value ) is true .
2) Right after the state is set, * this == std:: subtract_with_carry_engine ( seq ) is true .

Parameters

value - seed value to use to set the state
seq - seed sequence to use to set the state

Exceptions

2) If SeedSeq is not std::seed_seq , throws the exceptions thrown by the seq.generate call.

Complexity

1) Same as std:: subtract_with_carry_engine ( value ) .
2) Same as std:: subtract_with_carry_engine ( seq ) .

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 2181 C++11 overload ( 2 ) would not throw even if the seq.generate call throws propagates the exception
LWG 3809 C++11 the default argument of value was default_seed changed to 0u

See also

constructs the engine
(public member function)
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