Switch regular expression style (PCRE vs TRE)

Switch regular expression style (PCRE vs TRE)

set_PCRE()

set_TRE()

use_perl()

set_regexpr_style(style)

auto_set_regexpr_style()

Arguments

style

one of 'PCRE' or 'TRE'

Value

Logical indicating whether to use perl

References

https://stackoverflow.com/questions/47240375/regular-expressions-in-base-r-perl-true-vs-the-default-pcre-vs-tre

Author

Guangchuang Yu