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Are you sure it was Thompson who added backtracking to grep? Note also that the POSIX standard intentionally omits backtracking regex. It is a shame that others
by grumpyprole 2y ago
Are you sure it was Thompson who added backtracking to grep? Note also that the POSIX standard intentionally omits backtracking regex. It is a shame that others have not deprecated them.
- AlotOfReading 2y agoWe're talking about backtracking and not back references, right? The original implementations of Ed and Grep in Unix did backtracking, not back references.
- grumpyprole 2y agoOops I mean't back references, since that is the problem feature (that requires backtracking).