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Showing content from https://timsong-cpp.github.io/cppwp/n4659/string.swap below:

[string.swap]

24 Strings library [strings] 24.3 String classes [string.classes] 24.3.2 Class template basic_­string [basic.string] 24.3.2.6 basic_­string modifiers [string.modifiers] 24.3.2.6.8 basic_­string​::​swap [string.swap]

void swap(basic_string& s) noexcept(allocator_traits<Allocator>::propagate_on_container_swap::value || allocator_traits<Allocator>::is_always_equal::value);

Postconditions: *this contains the same sequence of characters that was in s, s contains the same sequence of characters that was in *this.

Complexity: Constant time.


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