search for: pcrepattern

...t;^I{,2}$", c("II", "III", "IIII")) > [1] TRUE TRUE FALSE Both the TRE and the PCRE specification only allow repetition quantifiers of the form {a} {a,b} {a,} https://laurikari.net/tre/documentation/regex-syntax/ https://www.pcre.org/original/doc/html/pcrepattern.html#SEC17 {,2} and {,4} are thus invalid and seem to result in undefined behaviour (which PCRE and TRE fill in different ways, but consistently not what was intended). > > grepl("^I{,2}$", c("II", "III", "IIII")) > [1] TRUE TRUE FALSE > &gt...

...IIII")) >> [1] TRUE TRUE FALSE > Both the TRE and the PCRE specification only allow repetition quantifiers of the form > {a} > {a,b} > {a,} > https://laurikari.net/tre/documentation/regex-syntax/ > https://www.pcre.org/original/doc/html/pcrepattern.html#SEC17 > {,2} and {,4} are thus invalid and seem to result in undefined behaviour (which PCRE and TRE fill in different ways, but consistently not what was intended). >> > grepl("^I{,2}$", c("II", "III", "IIII")) >> [1] T...

...token by >> PCRE.? I think this makes it a little clearer what's going on: >> >> ????? gsub("\\w", "a", "?", perl=TRUE) >> ????? [1] "?" >> >> So no match.? The PCRE docs >> https://www.pcre.org/original/doc/html/pcrepattern.html (this might be >> the old docs, but it works for our purposes here) mention we can turn on >> unicode property matching with the "(*UCP)" token: >> >> ?????? gsub("(*UCP)\\w", "a", "?", perl=TRUE) >> ?????? [1] "a"...

The help page for `?gsub` says (in the context of performance considerations): "... just one UTF-8 string will force all the matching to be done in Unicode" However, this thread on SO: https://stackoverflow.com/q/76749529 gives some indication that this is not true for `perl = TRUE`. Specifically: > strings <- c("89 562", "John Smith", "???????

>>>>> Jani V?limaa >>>>> on Tue, 14 Jan 2025 20:39:19 +0200 writes: > Hello, > I don't know what's changed or how to figure out why as.roman() started > to work different way lately on Mageia Cauldron. Cauldron is the > latest development version of Mageia Linux. > Expected bahavior: >>