Create a string that has the same value as the substring of the optionally specified numChars length starting at the beginning of the specified characterString. If numChars is not specified, CHAR_TRAITS::length(characterString) is used. Optionally specify the basicAllocator used to supply memory. If basicAllocator is not specified, a default‐constructed allocator is used. Throw out_of_range if numChars >= npos.

Synopsis

Declared in <bslstl_string.h>

basic_string(
    char8_t const* characterString,
    size_type numChars,
    allocator<char8_t> const& basicAllocator = ALLOCATOR());

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