21 Strings library [strings]

21.4 Class template basic_string [basic.string]

21.4.6 basic_string modifiers [string.modifiers]

21.4.6.5 basic_string::erase [string::erase]

basic_string<charT,traits,Allocator>& erase(size_type pos = 0, size_type n = npos);

Requires: pos <= size()

Throws: out_of_range if pos > size().

Effects: Determines the effective length xlen of the string to be removed as the smaller of n and size() - pos.

The function then replaces the string controlled by *this with a string of length size() - xlen whose first pos elements are a copy of the initial elements of the original string controlled by *this, and whose remaining elements are a copy of the elements of the original string controlled by *this beginning at position pos + xlen.

Returns: *this.

iterator erase(const_iterator p);

Effects: removes the character referred to by p.

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.

iterator erase(const_iterator first, const_iterator last);

Requires: first and last are valid iterators on *this, defining a range [first,last).

Effects: removes the characters in the range [first,last).

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.

void pop_back();

Requires: !empty()

Effects: Equivalent to erase(size() - 1, 1).