In MatchĀ§

See primary documentation in context for method replace-with

multi method replace-with(Match:D: Str() $replacement --> Str:D)

Returns the invocant string where the Match object is replaced by $replacement.

my Str $some-string = "Some foo";
my Match $match = $some-string.match(/foo/);
my $another-string = $match.replace-with("string"); # Ā«Some stringĀ»