package core_extended
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in-package search v0.2.0
Extra components that are not as closely vetted or as stable as Core
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Dune Dependency
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core_extended-v0.14.0.tar.gz
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doc/src/core_extended.selection/selector.ml.html
Source file selector.ml
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module Stable = struct open Core_kernel.Core_kernel_stable open Sexplib.Type module Date_selector = struct module V1 = struct type t = | GT of Date.V1.t | LT of Date.V1.t | Between of Date.V1.t * Date.V1.t | On of Date.V1.t [@@deriving bin_io, compare, sexp] let t_of_sexp sexp = let module Date = Core_kernel.Date in match sexp with | Atom _ as d -> On (Date.t_of_sexp d) | List [Atom ">"; Atom _ as d] -> GT (Date.t_of_sexp d) | List [Atom ">="; Atom _ as d] -> GT (Date.add_days (Date.t_of_sexp d) (-1)) | List [Atom "<"; Atom _ as d] -> LT (Date.t_of_sexp d) | List [Atom "<="; Atom _ as d] -> LT (Date.add_days (Date.t_of_sexp d) (1)) | List [Atom _ as d1; Atom "><"; Atom _ as d2] | List [Atom "><"; Atom _ as d1; Atom _ as d2] | List [Atom _ as d1; Atom _ as d2] -> (* The basic cases (GT, LT etc.) are being matched here, since they are lists of two atoms. Here the check whether the first atom is a date is done with try-with. *) begin try Between ((Date.t_of_sexp d1), (Date.t_of_sexp d2)) with _ -> t_of_sexp sexp end | _ -> t_of_sexp sexp end module Current = V1 end module String_selector = struct module Regexp = struct module V1 = struct module T = struct (* This type is stable in spite of using the Re2's non-stable type because bin_io and sexp conversion functions are explicitly defined below. *) type t = string * Re.re let to_string (s, _) = s let of_regexp s = s, Re.Perl.compile_pat s let of_string s = of_regexp s let compare t1 t2 = String.V1.compare (to_string t1) (to_string t2) end include T include (Binable.Of_stringable.V1 [@alert "-legacy"])(T) let t_of_sexp sexp = let open Core_kernel in let open Poly in let fail () = of_sexp_error "expected string bounded with / on both sides" sexp in match sexp with | List _ -> of_sexp_error "expected Atom" sexp | Atom s -> if String.length s < 2 then fail () else if s.[0] = '/' && s.[String.length s - 1] = '/' then let s = String.sub s ~pos:1 ~len:(String.length s - 2) in of_regexp s else fail () let sexp_of_t (s, _) = Sexp.V1.Atom ("/" ^ s ^ "/") end module Current = V1 end module V1 = struct type t = | Equal of string list | Matches of Regexp.V1.t list | Mixed of [ `Regexp of Regexp.V1.t | `Literal of string ] list [@@deriving bin_io, compare, sexp] let t_of_sexp sexp = let parse_atom a = match a with | List _ -> assert false | Atom s -> if Core_kernel.(let open Poly in String.length s >= 1 && s.[0] = '/') then `Regexp (Regexp.V1.t_of_sexp a) else `Literal s in try match sexp with | Atom _ as a -> begin match parse_atom a with | `Regexp r -> Matches [r] | `Literal s -> Equal [s] end | List l -> Mixed (Core_kernel.List.map l ~f:(fun sexp -> match sexp with | List _ -> Core_kernel.of_sexp_error "expected Atom" sexp | Atom _ as a -> parse_atom a)) with | e -> try t_of_sexp sexp with _ -> raise e end module Current = V1 end module String_list_selector = struct module V1 = struct type t = string list [@@deriving bin_io, sexp] let t_of_sexp sexp = match sexp with | Sexp.V1.Atom s -> [s] | _ -> t_of_sexp sexp end module Current = V1 end end open Core_kernel open Poly module type Selector = sig type selector type value val eval : selector -> value -> bool end module Date_selector = struct include Stable.Date_selector.Current type selector = t type value = Date.t let eval t d = match t with | GT gtd -> Date.(>) d gtd | LT ltd -> Date.(<) d ltd | Between (d1, d2) -> Date.(>=) d d1 && Date.(<=) d d2 | On ond -> Date.(=) d ond end module String_selector = struct module Regexp : sig type t = Stable.String_selector.Regexp.Current.t [@@deriving bin_io, sexp] val of_regexp : string -> t val to_string : t -> string val matches : t -> string -> bool val to_regexp : t -> Re.re end = struct include Stable.String_selector.Regexp.Current let to_regexp (_, p) = p let matches (_, rex) s = Re.execp rex s end include Stable.String_selector.Current type selector = t type value = String.t let eval t s = match t with | Equal el -> Option.is_some (List.find el ~f:(fun e -> e = s)) | Matches ml -> Option.is_some (List.find ml ~f:(fun rex -> Regexp.matches rex s)) | Mixed ml -> Option.is_some (List.find ml ~f:(function | `Regexp rex -> Regexp.matches rex s | `Literal l -> l = s)) end module String_list_selector = struct include Stable.String_list_selector.Current type selector = t type value = string let eval t s = match List.find t ~f:(fun m -> m = s) with | None -> false | Some _ -> true end
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