Module regex_literal::util

A collection of helper functions that process literal conversions.

delimit and undelimit

provide text convertion between delimited and undelimited literals.

Others

unescape_from_bytes, and unescape removes any escape character / that is prefixed to delimiter sequences in the regular expression literals. escape and escape_into_bytes prepend / to all delimiters in input texts.

Functions

• delimit
  create a delimited regular expression with the given delimiter string.
• delimit_many
  testing: creating a string list of delimited regular expressions
• escape
  Use escape function for escaping any delimiter sequence in regular expression text.
• escape_into_bytes
  Use escape_into_bytes function for escaping delimiter sequences and converting regular expression text into bytes
• infer_char_size
  infer character length from 1st byte. reference: UTF-8
• offset_ws
  check if there is any leading whitespace from a given start byte index and return the offset between start and non-whitespace character
• undelimit
  Strip off the enclosing delimiter pair and unescape delimiters from the input content. undelimit is the reversed function of delimit .
• unescape
  Convert any escaped delimiter sequence in the input string slices. Use unescape function for removing the escape character ’' from each escaped delimiter sequences in input string slices. This returns two variants, a Cow wrapped string if succeeds, and an error in String type if fails. unescape is the reversed function of escape .
• unescape_from_bytes
  Use unescape_from_bytes function for removing the escape character ’' from each escaped delimiter sequence in input bytes. This returns two variants: a Cow typed string if succeeds, and an error if fails.