void clear(); |
Removes all characters from the string as if by executing erase(begin(), end())
. The allocated memory will not be released, effectively leaving the capacity
of the string unchanged.
All pointers, references, and iterators are invalidated.
Parameters
(none).
Return value
(none).
Notes
Unlike for std::vector::clear
, the C++ standard does not explicitly require that capacity
is unchanged by this function, but existing implementations do not change capacity.
Exceptions
(none) | (until C++11) |
noexcept specification: noexcept | (since C++11) |
Complexity
Linear in the size of the string.
Example
#include <cassert> #include <string> int main() { std::string s{ "Exemplar" }; std::string::size_type const capacity = s.capacity(); s.clear(); assert(capacity == s.capacity()); assert(s.empty()); assert(0 == s.size()); }
See also
removes characters (public member function) |
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