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|
{
open Grammar
exception IllegalCharacter of char
}
let whitespace = [' ' '\t' '\r' '\n']+
let letter = ['a'-'z' 'A'-'Z']
let ident = letter+
rule token =
parse
| whitespace { token lexbuf }
| "(" { LPR }
| ")" { RPR }
| "[" { LBR }
| "]" { RBR }
| "->" { ARROW }
| ":=" { ASSIGN }
| "*" { ASTERISK }
| "\\" { BACKSLASH }
| "::" { DOUBLE_COLON }
| ":" { COLON }
| "," { COMMA }
| "." { DOT }
| "=>" { FATARROW }
| "_" { UNDERSCORE }
| "def" { DEF }
| "fst" { FST }
| "snd" { SND }
| "type" { TYPE }
| "bool" { BOOL }
| "true" { TRUE }
| "false" { FALSE }
| "bool-elim" { BOOL_ELIM }
| "at" { AT }
| ident { IDENT (Lexing.lexeme lexbuf) }
| eof { EOF }
| (_ as illegal_char) { raise (IllegalCharacter illegal_char) }
|