Wrap a pattern so it only matches whole tokens

The match may not be preceded or followed by a letter or digit, nor by a digit joined with a space or hyphen (so a 12-digit window inside a 16-digit card number is not reported as an Aadhaar number).

Usage

bounded(core)

Arguments

core

An ICU regular expression.

Value

A regular expression.

Examples

p <- bounded("[0-9]{4}")
stringi::stri_detect_regex(c("PIN 1234", "card 12345678"), p)
#> [1]  TRUE FALSE