(* camlp5r *)
(* $Id: plexer.mli,v 6.4 2013-06-14 03:03:31 deraugla Exp $ *)
(* Copyright (c) INRIA 2007-2012 *)

(** This module contains the lexer used for ocaml syntax (revised and
    normal). *)

value gmake : unit -> Plexing.lexer (string * string);
   (** [gmake ()] returns a lexer compatible with the extensible
    grammars. The returned tokens follow the normal syntax and the
    revised syntax lexing rules.

    The token type is "<tt>(string * string)</tt>" just like the pattern
    type.

       The meaning of the tokens are:
-      * [("", s)] is the keyword [s].
-      * [("", s)] is the keyword [s],
-      * [("LIDENT", s)] is the ident [s] starting with a lowercase letter,
-      * [("UIDENT", s)] is the ident [s] starting with an uppercase letter,
-      * [("INT", s)] is an integer constant whose string source is [s],
-      * [("INT_l", s)] is an 32 bits integer constant,
-      * [("INT_L", s)] is an 64 bits integer constant,
-      * [("INT_n", s)] is an native integer constant,
-      * [("FLOAT", s)] is a float constant whose string source is [s],
-      * [("STRING", s)] is the string constant [s],
-      * [("CHAR", s)] is the character constant [s],
-      * [("TILDEIDENT", s)] is the tilde character [~] followed by the
         ident [s],
-      * [("TILDEIDENTCOLON", s)] is the tilde character [~] followed by the
         ident [s] and a colon [:],
-      * [("QUESTIONIDENT", s)] is the question mark [?] followed by the
         ident [s],
-      * [("QUESTIONIDENTCOLON", s)] is the question mark [?] followed by the
         ident [s] and a colon [:],
-      * [("QUOTATION", "t:s")] is a quotation [t] holding the string [s],
-      * [("ANTIQUOT", "t:s")] is an antiquotation [t] holding the string [s],
-      * [("EOI", "")] is the end of input.

       The associated token patterns in the EXTEND statement hold the
       same names than the first string (constructor name) of the tokens
       expressions above.

       Warning: the string associated with the [STRING] constructor is
       the string found in the source without any interpretation. In
       particular, the backslashes are not interpreted. For example, if
       the input is ["\n"] the string is *not* a string with one
       element containing the "newline" character, but a string of two
       elements: the backslash and the ["n"] letter.

       Same thing for the string associated with the [CHAR] constructor.

       The functions [Plexing.eval_string] and [Plexing.eval_char] allow
       to convert them into the real corresponding string or char
       value. *)

value dollar_for_antiquotation : ref bool;
   (** When True (default), the next call to [Plexer.gmake ()] returns a
       lexer where the dollar sign is used for antiquotations. If False,
       the dollar sign can be used as token. *)

value specific_space_dot : ref bool;
   (** When [False] (default), the next call to [Plexer.gmake ()] returns a
       lexer where there is no difference between dots which have spaces
       before and dots which don't have spaces before. If [True], dots
       which have spaces before return the keyword " ." (space dot) and
       the ones which don't have spaces before return the keyword "."
       (dot alone). *)

value dot_newline_is : ref string;
   (** experimental
       Specific interpretation for a dot "." followed by a newline;
       by default, it is just a dot. Setting another value makes
       the lexer interpret it as this value. For example, in
       revised syntax (pa_r.ml) setting it to ";" allows to end
       phrases with a dot, instead of a semicolon. In normal syntax,
       the same can be done by setting it with ";;". *)

value no_quotations : ref bool;
   (** When True, all lexers built by [Plexer.gmake ()] do not lex the
       quotation syntax. Default is False (quotations are lexed). *)

value utf8_lexing : ref bool;
   (** When True, all lexers built by [Plexer.gmake ()] use utf-8 encoding
       to specify letters and punctuation marks. Default is False (all
       characters between '\128' and '\255' are considered as letters) *)

(*** For system use *)

value force_antiquot_loc : ref bool;
