Fix is_char_boundary documentation #72773
Merged
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Given the "start and/or end" wording in the original, the way I understood it was that the
str::is_char_boundary
method would also returntrue
for the last byte in a UTF-8 code point sequence. (Which would have meant that for a string consisting of nothing but 1 and 2 byte UTF-8 code point sequences, it would return nothing buttrue
.)In practice the method returns
true
only for the starting byte of each sequence and the end of the string: PlaygroundI was also somewhat tempted to remove the The start and end of the string are considered to be boundaries, since that's implied by the first sentence, but I decided to avoid bikeshedding over it and left it as it was since it's not wrong in relation to how the method behaves.