40 lines
2.0 KiB
OCaml
40 lines
2.0 KiB
OCaml
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(* camlp4r *)
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(***********************************************************************)
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(* *)
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(* Camlp4 *)
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(* *)
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(* Daniel de Rauglaudre, projet Cristal, INRIA Rocquencourt *)
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(* *)
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(* Copyright 2001 Institut National de Recherche en Informatique et *)
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(* Automatique. Distributed only by permission. *)
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(* *)
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(***********************************************************************)
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(* $Id$ *)
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(* Module [Plexer]: a lexical analyzer *)
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value make : unit -> Token.lexer;
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(* Some lexer provided. See the module [Token]. The tokens returned
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follow the Objective Caml and the Revised syntax lexing rules.
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The meaning of the tokens are:
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- * [("", s)] is the keyword [s].
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- * [("LIDENT", s)] is the ident [s] starting with a lowercase letter.
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- * [("UIDENT", s)] is the ident [s] starting with an uppercase letter.
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- * [("INT", s)] is an integer constant whose string source is [s].
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- * [("FLOAT", s)] is a float constant whose string source is [s].
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- * [("STRING", s)] is the string constant [s].
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- * [("CHAR", s)] is the character constant [s].
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- * [("QUOTATION", "t:s")] is a quotation [t] holding the string [s].
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- * [("ANTIQUOT", "t:s")] is an antiquotation [t] holding the string [s].
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- * [("LOCATE", "i:s")] is a location directive at pos [i] holding [s].
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- * [("EOI", "")] is the end of input.
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The associated token patterns in the EXTEND statement hold the
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same names than the first string (constructor name) of the tokens
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expressions above.
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The lexer do not use global (mutable) variables: instantiations
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of [Plexer.make ()] do not perturb each other. *)
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