Rob Pike’s simple C regex matcher in Go August 2022 Back in 1998, Rob Pike – of Go and Plan 9 fame – wrote a simple regular expression matcher in C for The Practice of Programming, a book he wrote with fellow Unix hacker Brian Kernighan. If you haven’t read Kernighan’s “exegesis” of this code, it’s definitely worth the 30-minute time investment it takes to go through that slowly. With Go’s C herit