C++17 STL Cookbook

Removing consecutive whitespace between words

Because strings are often read from user input, they may contain wild formatting and often need to be sanitized. One example of this is strings containing too many whitespace.

In this section, we will implement a slick whitespace filtering algorithm, which removes excess whitespace from strings but leaves single whitespace characters untouched. We call that algorithm remove_multi_whitespace, and its interface will look very STL-like.