21 Strings library [strings]

21.3 String classes [string.classes]

21.3.3 Class template basic_­string [basic.string]

21.3.3.7 Modifiers [string.modifiers]

21.3.3.7.5 basic_­string​::​erase [string.erase]

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constexpr basic_string& erase(size_type pos = 0, size_type n = npos);
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Effects: Determines the effective length xlen of the string to be removed as the smaller of n and size() - pos.
Removes the characters in the range [begin() + pos, begin() + pos + xlen).
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Returns: *this.
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Throws: out_­of_­range if pos > size().
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constexpr iterator erase(const_iterator p);
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Preconditions: p is a valid dereferenceable iterator on *this.
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Effects: Removes the character referred to by p.
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Returns: An iterator which points to the element immediately following p prior to the element being erased.
If no such element exists, end() is returned.
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Throws: Nothing.
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constexpr iterator erase(const_iterator first, const_iterator last);
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Preconditions: first and last are valid iterators on *this.
[first, last) is a valid range.
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Effects: Removes the characters in the range [first, last).
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Returns: An iterator which points to the element pointed to by last prior to the other elements being erased.
If no such element exists, end() is returned.
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Throws: Nothing.
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constexpr void pop_back();
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Preconditions: !empty().
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Effects: Equivalent to erase(end() - 1).
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Throws: Nothing.