css 0.1.0 · OCaml Package

Utilities for parsing.

val remove_options : 'a option list -> 'a list

val with_loc : T.ctx -> 'a Angstrom.t -> ('a * T.loc) Angstrom.t

val is_hex : char -> bool

val is_digit : char -> bool

val fail_at : string -> 'a Angstrom.t

Parser failing with the given message where current position is added.

val parse_error_at : T.ctx -> T.parse_error -> 'a Angstrom.t

parse_error ctx e raises a T.Error with a parse error e and last position of ctx.

Util parsers

val opt_ : 'a Angstrom.t -> 'a option Angstrom.t

opt_ p returns None if p fails, else return Some r where r is the result of p.

val take_char : char option Angstrom.t

take_char is a parser returning None is there is no more char, else accept any character c, Angstrom.advance by 1 char and returns Some c.

val take_while_upto : (char -> bool) -> int -> string Angstrom.t

take_while_upto pred n accepts at most n characters or as long a pred returns true. Returns accepted characters as a string.

val take_while1_upto : (char -> bool) -> int -> string Angstrom.t

Same as take_while_upto but fails if no character is available.

val comment : T.ctx -> unit Angstrom.t

Accept a comment.

val is_ws : char -> bool

val ws : T.ctx -> unit Angstrom.t

ws ctx accepts any number of white spaces or comments.

Parser combinators

val map_fst : ('a -> ('b * 'c) Angstrom.t) -> 'a -> 'b Angstrom.t

val (&&&) : 'a Angstrom.t -> 'b Angstrom.t -> ('a * 'b) Angstrom.t

p1 &&& p2 returns a parser succeeding when p1 and p2 succeed, in any order.

val (|||) : 
  'a Angstrom.t ->
  'b Angstrom.t ->
  ('a option * 'b option) Angstrom.t

p1 ||| p2 returns a parser accepting values for p1 or p2 or both.

val alt_1_2 : 
  'a ->
  'a Angstrom.t ->
  'b ->
  'b Angstrom.t ->
  ('a * 'b) Angstrom.t

alt_1_2 def1 p1 def2 p2 is the same as (|||) but returns the provided default values for each parser.

Predefined character parsers

All these parser accept a character after optional white spaces or comments.

val lchar : char -> T.ctx -> char Angstrom.t

val lbracket : T.ctx -> char Angstrom.t

val rbracket : T.ctx -> char Angstrom.t

val lbrace : T.ctx -> char Angstrom.t

val rbrace : T.ctx -> char Angstrom.t

val lpar : T.ctx -> char Angstrom.t

val rpar : T.ctx -> char Angstrom.t

val dot : T.ctx -> char Angstrom.t

val colon : T.ctx -> char Angstrom.t

val semicolon : T.ctx -> char Angstrom.t

val ampersand : T.ctx -> char Angstrom.t

val comma : T.ctx -> char Angstrom.t

val dquote : T.ctx -> char Angstrom.t

val quote : T.ctx -> char Angstrom.t

val plus : T.ctx -> char Angstrom.t

val minus : T.ctx -> char Angstrom.t

val pipe : T.ctx -> char Angstrom.t

val sharp : T.ctx -> char Angstrom.t

val slash : T.ctx -> char Angstrom.t

val gt : T.ctx -> char Angstrom.t

val tilde : T.ctx -> char Angstrom.t

Parsing integers and sign

val sign : T.ctx -> char Angstrom.t

val integer : T.ctx -> int Angstrom.t

package css

Util parsers

Parser combinators

Predefined character parsers

Parsing integers and sign