Standard library for ppx rewriters
Library ppxlib
Module Ppxlib . Location

There are less functions in this module. However the API should be more stable than the Location module of OCaml.

type t = Astlib.Location.t = {
loc_start : Lexing.position;
loc_end : Lexing.position;
loc_ghost : bool;
val in_file : string -> t

Return an empty ghost range located in a given file.

val set_filename : t -> string -> t

Set the pos_fname both in loc_start and loc_end. Leave the rest as is.

val none : t

An arbitrary value of type t; describes an empty ghost range.

val init : Lexing.lexbuf -> string -> unit

Set the file name and line number of the lexbuf to be the start of the named file.

val raise_errorf : ?loc:t -> ( 'a, Stdppx.Caml.Format.formatter, unit, 'b ) format4 -> 'a

Raise a located error. Should be avoided as much as possible, in favor of error_extensionf.

val of_lexbuf : Lexing.lexbuf -> t

Return the location corresponding to the last matched regular expression

val report_exception : Stdppx.Caml.Format.formatter -> exn -> unit

Report an exception on the given formatter

val print : Stdppx.Caml.Format.formatter -> t -> unit

Prints File "...", line ..., characters ...-...:

type nonrec 'a loc = 'a Astlib.Location.loc = {
txt : 'a;
loc : t;
val compare_pos : Lexing.position -> Lexing.position -> int
val compare : t -> t -> int
module Error : sig ... end
val error_extensionf : loc:t -> ( 'a, Format.formatter, unit, string Astlib.Location.loc * Astlib.Ast_412.Parsetree.payload ) format4 -> 'a

Returns an error extension node. When encountered in the AST, the compiler recognizes it and displays the error properly.

exception Error of Error.t