Comment by i3oi3

Are the examples all actual outputs of the program? It's entirely possible that my understanding of the grammar is off, but it looks like these examples are wrong:

$ echo 'cat dog' | trre 'c:bat|d:hog' bat hog

$ echo '' | trre ':a*' # <- do NOT do this dog

$ echo '' | trre ':(repeat-10-times){10}' dog