Sourceval prepare_lexbuf :
lexer_state ->
Stdlib.Lexing.lexbuf ->
Stdlib.Lexing.lexbuf Sourceexception Error of {msg : string;pos : Stdlib.Lexing.position;
} Sourceval sentence_interpreter :
Stdlib.Lexing.lexbuf ->
[ `IDENT of string | `COLON | `EOF | `UNEXPECTED of char ]