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#' regex
#'
#' Creates or modifies the search type to use regular expression matching
#'
#' @param object to make specification
#' @param ... additional arguments passes to \code{\link{pattern}}
#'
#' \code{regex}
#'
#' @seealso
#' \code{\link{pattern}}
#'
#' @examples
#' pat <- regex("a.+")
#' detect( c('alpha','beta'), pat )
#'
#' @rdname regex
#' @export
regex <- function( object, ... ) UseMethod('regex')
#' @rdname regex
#' @export
regex.default <- function( object, ... ) pattern( as.character(object), 'regex', ... )
#' @rdname regex
#' @export
regex.character <- function( object, ... ) pattern( object, 'regex', ... )
#' @rdname regex
#' @export
# Note: an alternative is to clobber the options
regex.SearchableOrPattern <- function( object, ... ) {
object@type = 'regex'
object@options = list(...)
return(object)
}
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