As parseRRegexPattern, but only where the JavaScript regex matches what R matches: undefined for a pattern with an escape or a group ((?...)) the two read differently, a posix class there is no translation for, or one JavaScript cannot compile.
undefined
(?...)
As parseRRegexPattern, but only where the JavaScript regex matches what R matches:
undefinedfor a pattern with an escape or a group ((?...)) the two read differently, a posix class there is no translation for, or one JavaScript cannot compile.