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(* camlp5r *)
(* mlsyntax.ml *)
(* Copyright (c) INRIA 2007-2017 *)
value symbolchar_or f st ?{lim} s =
let list =
['!'; '$'; '%'; '&'; '*'; '+'; '-'; '.'; '/'; ':'; '<'; '='; '>'; '?';
'@'; '^'; '|'; '~']
in
let lim = match lim with [ None -> String.length s | Some j -> j ] in
loop st where rec loop i =
if i == lim then True
else if List.mem s.[i] list || f s.[i] then loop (i + 1)
else False
;
value symbolchar = symbolchar_or (fun x -> False) ;
value dotsymbolchar st ?{lim} s =
let list = [ '!'; '$'; '%'; '&'; '*'; '+'; '-'; '/'; ':'; '='; '>'; '?';
'@'; '^'; '|' ]
in
let lim = match lim with [ None -> String.length s | Some j -> j ] in
loop st where rec loop i =
if i == lim then True
else if List.mem s.[i] list then loop (i + 1)
else False
;
value kwdopchar =
let list = [ '$'; '&'; '*'; '+'; '-'; '/'; '<'; '='; '>';
'@'; '^'; '|' ]
in
fun s i ->
if i == String.length s then True
else List.mem s.[i] list
;
module Original = struct
value is_prefixop =
let list = ['!'; '?'; '~'] in
let excl = ["!="; "??"; "?!"] in
fun x ->
not (List.mem x excl) && String.length x >= 2 &&
List.mem x.[0] list && symbolchar_or (fun x -> '#' = x) 1 x
;
value is_infixop0_0 =
let list = ['|'] in
let excl = ["||"] in
fun x ->
not (List.mem x excl) && String.length x >= 2 &&
List.mem x.[0] list && symbolchar 1 x
;
value is_infixop0_1 =
let list = ['&'] in
let excl = ["&&"] in
fun x ->
not (List.mem x excl) && String.length x >= 2 &&
List.mem x.[0] list && symbolchar 1 x
;
value is_infixop0_2 =
let list = ['='; '<'; '>'; '$'] in
let excl = ["<-"] in
fun x ->
not (List.mem x excl) && (x = "$" || String.length x >= 2) &&
List.mem x.[0] list && symbolchar 1 x
;
value is_infixop0 s =
is_infixop0_0 s
|| is_infixop0_1 s
|| is_infixop0_2 s
;
value is_infixop1 =
let list = ['@'; '^'] in
fun x ->
String.length x >= 2 && List.mem x.[0] list &&
symbolchar 1 x
;
value is_infixop2 =
let list = ['+'; '-'] in
fun x ->
x <> "->" && String.length x >= 2 && List.mem x.[0] list &&
symbolchar 1 x
;
value is_infixop3 =
let list = ['*'; '/'; '%'] in
let excl = ["**"] in
fun x ->
not (List.mem x excl) && String.length x >= 2 && List.mem x.[0] list &&
symbolchar 1 x
;
value is_infixop4 x =
String.length x >= 3 && x.[0] == '*' && x.[1] == '*' &&
symbolchar 2 x
;
value is_hashop =
let list = ['#'] in
let excl = ["#"] in
fun x ->
not (List.mem x excl) && String.length x >= 2 &&
List.mem x.[0] list && symbolchar_or (fun x -> '#' = x) 1 x
;
value is_operator0 = do {
let ht = Hashtbl.create 73 in
let ct = Hashtbl.create 73 in
List.iter (fun x -> Hashtbl.add ht x True)
["asr"; "land"; "lor"; "lsl"; "lsr"; "lxor"; "mod"; "or"];
List.iter (fun x -> Hashtbl.add ct x True)
['!'; '&'; '*'; '+'; '-'; '/'; ':'; '<'; '='; '>'; '@'; '^'; '|'; '~';
'?'; '%'; '.'; '$'];
fun x ->
try Hashtbl.find ht x with
[ Not_found -> try Hashtbl.find ct x.[0] with _ -> False ]
};
value is_andop s =
String.length s > 3 &&
String.sub s 0 3 = "and" &&
kwdopchar s 3 &&
dotsymbolchar 4 s
;
value is_letop s =
String.length s > 3 &&
String.sub s 0 3 = "let" &&
kwdopchar s 3 &&
dotsymbolchar 4 s
;
value is_operator s =
is_operator0 s || is_hashop s
;
value is_infix_operator op =
is_operator op && (match op.[0] with [ '!'| '?'| '~' -> False | _ -> True ])
;
value is_dotop s =
String.length s >= 2 &&
String.get s 0 = '.' &&
dotsymbolchar 1 ~{lim=2} s &&
symbolchar 2 s
;
value is_special_op s = is_operator s || is_letop s || is_andop s || is_dotop s ;
end ;
module Revised = struct
include Original ;
value is_infixop0_2 =
let list = ['='; '<'; '>'; '$'] in
let excl = ["<-"] in
fun x ->
not (List.mem x excl) && String.length x >= 2 &&
List.mem x.[0] list && symbolchar 1 x
;
value is_infixop0 s =
is_infixop0_0 s
|| is_infixop0_1 s
|| is_infixop0_2 s
;
value is_operator0 s = s <> "$" && is_operator s ;
value is_operator s =
is_operator0 s || is_hashop s
;
value is_infix_operator op =
is_operator op && (match op.[0] with [ '!'| '?'| '~' -> False | _ -> True ])
;
value is_dotop s =
String.length s >= 2 &&
String.get s 0 = '.' &&
dotsymbolchar 1 ~{lim=2} s &&
symbolchar 2 s
;
value is_special_op s = is_operator s || is_letop s || is_andop s || is_dotop s ;
end ;
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