Who could give me some comments on LPeg code snippets?

[leeya <leeyacn@...>]

I read test.lua script from lpeg-0.9 and had a little confusion to code snippet below:

 

t = {m.match({[1] = m.C(m.C(1) * m.V(1) + -1)}, "abc")}
checkeq(t, {"abc", "a", "bc", "b", "c", "c", ""})

 

Who could give me some comments of above code? Why the output is {"abc", "a", "bc", "b", "c", "c", ""} sequence?

The same question was given as following too,

t = m.match(m.Ct(m.C(m.C(1) * 1 * m.C(1))), "alo")
checkeq(t, {"alo", "a", "o"}) 

 

Thanks a lot.