package pacomb

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package pacomb

pacomb
- Pacomb
  - Assoc
  - Blank
  - Charset
  - Comb
  - Container
    
    Make
    
    T
    
    Param
    
    Ref
  - Grammar
  - Hashtbl_eq
  - Input
    
    Preprocessor
    
    Tbl
    
    WithPP
    
    PP
  - Keywords
    
    Make
    
    S
    
    Spec
  - Lex
  - Pos
  - Regexp
  - UnionFind
  - Utf8
  - Word_list

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A small module for efficient regular expressions.

type regexp =

| Chr of char
| Set of Charset.t
| Seq of regexp list
| Alt of regexp list
| Opt of regexp
| Str of regexp
| Pls of regexp
| Sav of regexp

Type of a regular expression.

type t = regexp

Short synonym of regexp.

val pp : Stdlib.Format.formatter -> regexp -> unit

pp ff re outputs the regexp re to the formatter ff.

val accepts_empty : regexp -> bool

accepts_empty re tells whether the empty input is valid for re.

val accepted_first_chars : regexp -> Charset.t

accepted_first_chars re returns the set of characters that are possible, valid first characters for matching re.

exception Regexp_error of Input.buffer * Input.pos

Exception raised when a regexp does not match. Note that the given buffer and position correspond to the first character that cannot be matched.

val from_string : string -> regexp

from_string s convert a string into a regexp following Str syntax.

val regexp : ?name:string -> regexp -> string Lex.t

create a terminal from a regexp. Returns the whole matched string

val regexp_grps : ?name:string -> ?grps:int list -> regexp -> string list Lex.t

create a terminal from a regexp. Returns the groups list, last to finish to be parsed is first in the result. The optional argument grps allows selection of the produced groups. As usual, 0 means the whole regexp and n > 0 the sub string corresponding to the nth opening parenthesis.

val blank_regexp : string -> Blank.t

create a blank function from a string representing a regexp