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|
(*
* This file is part of Coccinelle, lincensed under the terms of the GPL v2.
* See copyright.txt in the Coccinelle source code for more information.
* The Coccinelle source code can be obtained at http://coccinelle.lip6.fr
*)
(* Lexer for the command line mode *)
{
exception Lexical of string
let tok = Lexing.lexeme
type cli_tok =
Id of string
| NotEq
| EqEq
| Other of string
| EOF
let pretty_print tok =
match tok with
Id s -> s
| NotEq -> "when !="
| EqEq -> "when =="
| Other s -> s
| EOF -> ""
}
let special = ':'
let letter = ['A'-'Z' 'a'-'z' '_']
let dec = ['0'-'9']
let alphanum = (letter | dec)
let id = letter (alphanum | special)*
rule token = parse
| "when" [' ' '\t']* "!=" [' ' '\t']* { NotEq }
| "when" [' ' '\t']* "==" [' ' '\t']* { EqEq }
| [' ' '\t']+ { Other(" ") }
| id { Id(tok lexbuf) }
| eof { EOF }
| _ { Other(tok lexbuf) }
|
