create_regex: Create a regex from components.
In assertive.strings: Assertions to Check Properties of Strings

Description Usage Arguments Value Examples

View source: R/internal-string.R

Creates a regex from regex components.

1	create_regex(..., l = list(), sep = "[- ]?")

`...`	Character vectors of regex components.
`l`	A list of character vectors for alternate specification.
`sep`	Regex for separating components of complete regex. Defaults to "an optional space or hyphen".

A string containing a regex. Each element in the vectors are pasted together, separated by the sep value. Those character vectors are then preceded by "^" (regex for 'start of string'() and followed by "$" (regex for end of string). Finally, the regexes are collapsed with "|" (regex for 'or').

## Not run: 
cas_number_components <- c(
  "[[:digit:]]{1,7}", "[[:digit:]]{2}", "[[:digit:]]"
)
cas_number_rx <- create_regex(rx_components, sep = "-")

## End(Not run)