Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

Remove the first characters.

void
remove_prefix(
    size_type n);

decode_view d( "Program%20Files" );
d.remove_prefix( 8 );
assert( d == "Files" );

not this->empty()

Linear.