print $data;;

#some "random stuff" @include "some file" did you parse that?
#more 'random' stuff @include 'another file' you sure?
#and more random stuff @include yet\ another\ file positive?

print for $data =~ m[\@include\s('[^']+'|"[^"]+"|.+?(?<!\\))\s]g;;
"some file"
'another file'
yet\ another\ file