Source file tok.ml
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(** The type of token for the Rocq lexer and parser *)
let string_equal (s1 : string) s2 = s1 = s2
type 'c p =
| PKEYWORD : string -> string p
| PIDENT : string option -> string p
| PFIELD : string option -> string p
| PNUMBER : NumTok.Unsigned.t option -> NumTok.Unsigned.t p
| PSTRING : string option -> string p
| PLEFTQMARK : unit p
| PBULLET : string option -> string p
| PQUOTATION : string -> string p
| PEOI : unit p
let pattern_exact : type c. c p -> bool = function
| PKEYWORD _ -> true
| PIDENT id -> Option.has_some id
| PFIELD s -> Option.has_some s
| PNUMBER n -> Option.has_some n
| PSTRING s -> Option.has_some s
| PLEFTQMARK -> false
| PBULLET s -> Option.has_some s
| PQUOTATION _ -> true
| PEOI -> false
type t =
| KEYWORD of string
| IDENT of string
| FIELD of string
| NUMBER of NumTok.Unsigned.t
| STRING of string
| LEFTQMARK
| BULLET of string
| QUOTATION of string * string
| EOI
let equal_p (type a b) (t1 : a p) (t2 : b p) : (a, b) Util.eq option =
let streq s1 s2 = match s1, s2 with None, None -> true
| Some s1, Some s2 -> string_equal s1 s2 | _ -> false in
match t1, t2 with
| PIDENT s1, PIDENT s2 when streq s1 s2 -> Some Util.Refl
| PKEYWORD s1, PKEYWORD s2 when string_equal s1 s2 -> Some Util.Refl
| PIDENT (Some s1), PKEYWORD s2 when string_equal s1 s2 -> Some Util.Refl
| PKEYWORD s1, PIDENT (Some s2) when string_equal s1 s2 -> Some Util.Refl
| PFIELD s1, PFIELD s2 when streq s1 s2 -> Some Util.Refl
| PNUMBER None, PNUMBER None -> Some Util.Refl
| PNUMBER (Some n1), PNUMBER (Some n2) when NumTok.Unsigned.equal n1 n2 -> Some Util.Refl
| PSTRING s1, PSTRING s2 when streq s1 s2 -> Some Util.Refl
| PLEFTQMARK, PLEFTQMARK -> Some Util.Refl
| PBULLET s1, PBULLET s2 when streq s1 s2 -> Some Util.Refl
| PQUOTATION s1, PQUOTATION s2 when string_equal s1 s2 -> Some Util.Refl
| PEOI, PEOI -> Some Util.Refl
| _ -> None
let compare_p (type a b) (t1 : a p) (t2 : b p) : int =
match t1, t2 with
| PIDENT None, PIDENT None -> 0
| PIDENT None, _ -> -1
| _, PIDENT None -> 1
| (PIDENT (Some s1) | PKEYWORD s1), (PIDENT (Some s2) | PKEYWORD s2) -> String.compare s1 s2
| (PIDENT (Some _) | PKEYWORD _), _ -> -1
| _, (PIDENT (Some _) | PKEYWORD _) -> 1
| PFIELD s1, PFIELD s2 -> Option.compare String.compare s1 s2
| PFIELD _, _ -> -1
| _, PFIELD _ -> 1
| PNUMBER n1, PNUMBER n2 -> Option.compare NumTok.Unsigned.compare n1 n2
| PNUMBER _, _ -> -1
| _, PNUMBER _ -> 1
| PSTRING s1, PSTRING s2 -> Option.compare String.compare s1 s2
| PSTRING _, _ -> -1
| _, PSTRING _ -> 1
| PLEFTQMARK, PLEFTQMARK -> 0
| PLEFTQMARK, _ -> -1
| _, PLEFTQMARK -> 1
| PBULLET s1, PBULLET s2 -> Option.compare String.compare s1 s2
| PBULLET _, _ -> -1
| _, PBULLET _ -> 1
| PQUOTATION s1, PQUOTATION s2 -> String.compare s1 s2
| PQUOTATION _, _ -> -1
| _, PQUOTATION _ -> 1
| PEOI, PEOI -> 0
let token_text : type c. c p -> string = function
| PKEYWORD t -> "'" ^ t ^ "'"
| PIDENT None -> "identifier"
| PIDENT (Some t) -> "'" ^ t ^ "'"
| PNUMBER None -> "number"
| PNUMBER (Some n) -> "'" ^ NumTok.Unsigned.sprint n ^ "'"
| PSTRING None -> "string"
| PSTRING (Some s) -> "STRING \"" ^ s ^ "\""
| PLEFTQMARK -> "LEFTQMARK"
| PEOI -> "end of input"
| PFIELD None -> "FIELD"
| PFIELD (Some s) -> "FIELD \"" ^ s ^ "\""
| PBULLET None -> "BULLET"
| PBULLET (Some s) -> "BULLET \"" ^ s ^ "\""
| PQUOTATION lbl -> "QUOTATION \"" ^ lbl ^ "\""
let diff_mode = function
| KEYWORD s -> s
| IDENT s -> s
| STRING s ->
if diff_mode then
let escape_quotes s =
let len = String.length s in
let buf = Buffer.create len in
for i = 0 to len-1 do
let ch = String.get s i in
Buffer.add_char buf ch;
if ch = '"' then Buffer.add_char buf '"' else ()
done;
Buffer.contents buf
in
"\"" ^ (escape_quotes s) ^ "\""
else s
| FIELD s -> if diff_mode then "." ^ s else s
| NUMBER n -> NumTok.Unsigned.sprint n
| LEFTQMARK -> "?"
| BULLET s -> s
| QUOTATION(_,s) -> s
| EOI -> ""
let trim_quotation txt =
let len = String.length txt in
if len = 0 then None, txt
else
let c = txt.[0] in
if c = '(' || c = '[' || c = '{' then
let rec aux n =
if n < len && txt.[n] = c then aux (n+1)
else Some c, String.sub txt n (len - (2*n))
in
aux 0
else None, txt
let match_pattern (type c) (p : c p) : t -> c option =
let seq = string_equal in
match p with
| PKEYWORD s ->
(function KEYWORD s' when seq s s' -> Some s'
| NUMBER n when seq s (NumTok.Unsigned.sprint n) -> Some s
| STRING s' when seq s (CString.quote_coq_string s') -> Some s
| _ -> None)
| PIDENT None -> (function IDENT s' -> Some s' | _ -> None)
| PIDENT (Some s) -> (function (IDENT s' | KEYWORD s') when seq s s' -> Some s' | _ -> None)
| PFIELD None -> (function FIELD s -> Some s| _ -> None)
| PFIELD (Some s) -> (function FIELD s' when seq s s' -> Some s' | _ -> None)
| PNUMBER None -> (function NUMBER s -> Some s| _ -> None)
| PNUMBER (Some n) ->
let s = NumTok.Unsigned.sprint n in
(function NUMBER n' when s = NumTok.Unsigned.sprint n' -> Some n' | _ -> None)
| PSTRING None -> (function STRING s -> Some s | _ -> None)
| PSTRING (Some s) -> (function STRING s' when seq s s' -> Some s' | _ -> None)
| PLEFTQMARK -> (function LEFTQMARK -> Some () | _ -> None)
| PBULLET None -> (function BULLET s -> Some s | _ -> None)
| PBULLET (Some s) -> (function BULLET s' when seq s s' -> Some s' | _ -> None)
| PQUOTATION lbl -> (function QUOTATION(lbl',s') when string_equal lbl lbl' -> Some s' | _ -> None)
| PEOI -> (function EOI -> Some () | _ -> None)