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author | 2012-01-12 16:08:29 +0100 | |
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committer | 2012-01-12 16:08:29 +0100 | |
commit | 23a6061a81ffa0c214d521287b6af0a31bfa22f0 (patch) | |
tree | f1ca9ba9240b98b8695a9f1870e56602734cf97c /parsing/tok.ml | |
parent | de109d8c0c68f569b907e6e24271f259ba28888e (diff) | |
parent | 39efc41237ec906226a3a53d7396d51173495204 (diff) |
Merge commit 'upstream/8.4_beta+dfsg' into experimental/master
Diffstat (limited to 'parsing/tok.ml')
-rw-r--r-- | parsing/tok.ml | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/parsing/tok.ml b/parsing/tok.ml new file mode 100644 index 00000000..bd7645c2 --- /dev/null +++ b/parsing/tok.ml @@ -0,0 +1,90 @@ +(************************************************************************) +(* v * The Coq Proof Assistant / The Coq Development Team *) +(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2010 *) +(* \VV/ **************************************************************) +(* // * This file is distributed under the terms of the *) +(* * GNU Lesser General Public License Version 2.1 *) +(************************************************************************) + +(** The type of token for the Coq lexer and parser *) + +type t = + | KEYWORD of string + | METAIDENT of string + | PATTERNIDENT of string + | IDENT of string + | FIELD of string + | INT of string + | STRING of string + | LEFTQMARK + | EOI + +let extract_string = function + | KEYWORD s -> s + | IDENT s -> s + | STRING s -> s + | METAIDENT s -> s + | PATTERNIDENT s -> s + | FIELD s -> s + | INT s -> s + | LEFTQMARK -> "?" + | EOI -> "" + +let to_string = function + | KEYWORD s -> Format.sprintf "%S" s + | IDENT s -> Format.sprintf "IDENT %S" s + | METAIDENT s -> Format.sprintf "METAIDENT %S" s + | PATTERNIDENT s -> Format.sprintf "PATTERNIDENT %S" s + | FIELD s -> Format.sprintf "FIELD %S" s + | INT s -> Format.sprintf "INT %s" s + | STRING s -> Format.sprintf "STRING %S" s + | LEFTQMARK -> "LEFTQMARK" + | EOI -> "EOI" + +let match_keyword kwd = function + | KEYWORD kwd' when kwd = kwd' -> true + | _ -> false + +let print ppf tok = Format.fprintf ppf "%s" (to_string tok) + +(** For camlp5, conversion from/to [Plexing.pattern], + and a match function analoguous to [Plexing.default_match] *) + +let of_pattern = function + | "", s -> KEYWORD s + | "IDENT", s -> IDENT s + | "METAIDENT", s -> METAIDENT s + | "PATTERNIDENT", s -> PATTERNIDENT s + | "FIELD", s -> FIELD s + | "INT", s -> INT s + | "STRING", s -> STRING s + | "LEFTQMARK", _ -> LEFTQMARK + | "EOI", _ -> EOI + | _ -> failwith "Tok.of_pattern: not a constructor" + +let to_pattern = function + | KEYWORD s -> "", s + | IDENT s -> "IDENT", s + | METAIDENT s -> "METAIDENT", s + | PATTERNIDENT s -> "PATTERNIDENT", s + | FIELD s -> "FIELD", s + | INT s -> "INT", s + | STRING s -> "STRING", s + | LEFTQMARK -> "LEFTQMARK", "" + | EOI -> "EOI", "" + +let match_pattern = + let err () = raise Stream.Failure in + function + | "", "" -> (function KEYWORD s -> s | _ -> err ()) + | "IDENT", "" -> (function IDENT s -> s | _ -> err ()) + | "METAIDENT", "" -> (function METAIDENT s -> s | _ -> err ()) + | "PATTERNIDENT", "" -> (function PATTERNIDENT s -> s | _ -> err ()) + | "FIELD", "" -> (function FIELD s -> s | _ -> err ()) + | "INT", "" -> (function INT s -> s | _ -> err ()) + | "STRING", "" -> (function STRING s -> s | _ -> err ()) + | "LEFTQMARK", "" -> (function LEFTQMARK -> "" | _ -> err ()) + | "EOI", "" -> (function EOI -> "" | _ -> err ()) + | pat -> + let tok = of_pattern pat in + function tok' -> if tok = tok' then snd pat else err () |