# Module type CamomileLibrary.Type.URe.Type

    module type Type = sig .. end

    type text

    type index

    type compiled_regexp

    module SubText: CamomileLibrary.Type.SubText.Type  with type ur_text = text and type ur_index = index

    val compile : CamomileLibrary.Type.URe.regexp ->
           compiled_regexp

Compile regular expressions.

    val regexp_match : ?sem:CamomileLibrary.Type.URe.match_semantics ->
           compiled_regexp ->
           text ->
           index ->
           SubText.t option array option

`regexp_match ?sem r t i` tries matching `r` and substrings of `t` beginning from `i`. If match successes, `Some g` is returned where `g` is the array containing the matched string of `n`-th group in the `n`-element. The matched string of the whole `r` is stored in the `0`-th element. If matching fails, `None` is returned.

    val string_match : compiled_regexp ->
           text ->
           index -> bool

`string_match r t i` tests whether `r` can match a substring of `t` beginning from `i`.

    val search_forward : ?sem:CamomileLibrary.Type.URe.match_semantics ->
           compiled_regexp ->
           text ->
           index ->
           SubText.t option array option

`search_forward ?sem r t i` searches a substring of `t` matching `r` from `i`. The returned value is similar to `CamomileLibrary.Type.URe.Type.regexp_match`.