Description

Mutable Container2D is a Container2D that also provides non-const access to its elements.

Requirements

In addition to the requirements defined in Container2D, a Mutable Container2D also provides the following:

Reference type	`X::reference`	A type that behaves as reference to the Mutable Container2D 's value type.
Iterator type	`X::iterator`	A mutable iterator similar to Const iterator type, which can be used to iterate over the Mutable Container2D (and modify the elements). Typically the iterator iterates along a row, and when the end of one row is reached it jumps to the beginning of the next row.
Column iterator type	`X::column_iterator`	A mutable iterator that can be used to modify the elements in one column of the Mutable Container2D.
Row iterator type	`X::row_iterator`	A mutable iterator that can be used to modify the elements in one row of the Mutable Container2D.

Name	Expression	Precondition	Return type	Postcondition
Beginning of range	`a.begin()`		`iterator`	`iterator` is derefenceable, unless `a` is empty
Beginning of column	`a.begin_column(size_t column)`	`0 <= column < a.columns()`	`column_iterator`	`column_iterator` is derefenceable, unless `a` is empty
Beginning of row	`a.begin_row(size_t row)`	`0 <= row < a.rows()`	`row_iterator`	`row_iterator` is derefenceable, unless `a` is empty
End of range	`a.end()`		`iterator`
End of column	`a.end_column(size_t column)`	`column<a.columns()`	`column_iterator`
End of row	`a.end_row(size_t row)`	`row<a.rows()`	`row_iterator`
Element Access	`a(size_t row, size_t column)`	`0 <= row < a.rows()` and `0 <= column < a.columns()`	`reference`

Examples of concept Mutable Container2D include: