Function builtin_regmatches_assign 

fn builtin_regmatches_assign(
    args: &[RValue],
    _: &[(String, RValue)],
) -> Result<RValue, RError>

Replace matched substrings using regexpr/gregexpr match data.

Called as regmatches(x, m) <- value. The replacement function receives args (x, m, value):

• For regexpr data: value is a character vector of replacements
• For gregexpr data: value is a list of character vectors

@param x character vector that was searched @param m match data from regexpr() or gregexpr() @param value replacement strings @return character vector with matched substrings replaced