TRegExpr and negative lookahead ?

[guest58172]

Hello, it seems that negative lookaheads are not supported ? The following pattern does not compile for example: https://regex101.com/r/tDXjYu/1/. I know that there are other engines but actually i'm stuck because it's a synedit search so i cannot change it.

[Leledumbo]

SynEdit uses RegExpr unit from Sorokin, so you can refer to its documentation for what's supported.

[Thaddy]

Hello, it seems that negative lookaheads are not supported ? The following pattern does not compile for example: https://regex101.com/r/tDXjYu/1/. I know that there are other engines but actually i'm stuck because it's a synedit search so i cannot change it.

Do you mean back-propagation (supported) or real negative lookaheads (not supported directly)?

[guest58172]

SynEdit uses RegExpr unit from Sorokin, so you can refer to its documentation for what's supported.

At least i see clearly that it's not supported

[guest58172]

Hello, it seems that negative lookaheads are not supported ? The following pattern does not compile for example: https://regex101.com/r/tDXjYu/1/. I know that there are other engines but actually i'm stuck because it's a synedit search so i cannot change it.

Do you mean back-propagation (supported) or real negative lookaheads (not supported directly)?

Lookahead but would you have an example of back propagation for the regex i put in the first post (link) ?

[guest58172]

When i mentioned other engines i thought to BeRo but actually it does not support negative lookaheads either: https://github.com/BeRo1985/flre/issues/27.

That being said i can (and do) use char ranges with gaps to simulate a negated lookahead.