package earley

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package earley

earley.core
- Earley_core
  - Blanks
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  - Earley
    
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  - Internals
    
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  - Regexp
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earley.ocaml
- Earley_ocaml
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earley.str
- Earley_str

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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 * string ref

Type of a regular expression.

exception Regexp_error of Input.buffer * int

Exception that is raised when a regexp cannot be read.

val print_regexp : out_channel -> regexp -> unit

val accept_empty : regexp -> bool

val accepted_first_chars : regexp -> Charset.t

val regexp_from_string : string -> regexp * string ref array

val read_regexp : regexp -> Input.buffer -> int -> Input.buffer * int

read_regexp re buf pos attempts to parse using the buffer buf at position pos using the regular expression re. The return value is a triple of the parsed string, the buffer after parsing and the position after parsing. The exception Regexp_error(err_buf, err_pos is raised in case of failure at the given position.