Re: [NTG-context] Off-topic: Struggles with LPEG grammar

On 21 Dec 2020, at 13:16, Mojca Miklavec wrote:

My only explanation would be that perhaps "^1" is so greedy that the rest of the pattern doesn't get found. But I don't want to believe that explanation.

Which (of course) means that that is exactly what happens ;) The ones that match are ababbb (a (ba+bb) b) => r4 r1(r3(r5 r4) r2(r5 r5)) r5 abbbab (a (bb+ba) b) => r4 r1(r2(r5 r5) r3(r5 r4)) r5 With the ^1, in the “bb” cases the first “b” eats all three “b”s: ababbb fails the r5 at the end abbbab fails the first r2 already (since the second r5 therein never happens) Best wishes, Taco