package ppxlib

  1. Overview
  2. Docs
Standard infrastructure for ppx rewriters

Install 

dune-project
 Dependency

github.com Readme Changelog MIT License Edit opam file Versions (25)

Authors

  1. J
    Jane Street Group, LLC <opensource@janestreet.com>

Maintainers

  1. O
    opensource@janestreet.com

Sources

ppxlib-0.39.0.tbz
sha256=441a2814dbac3f5dc0c8dcefca263548e9b4d6dda1ef2990ce6a4999e108be3c
sha512=55ace8f9c8ddb6b495ace105c1b594b983fc37946bd3d9531c1c45160341d2b06e679785e2db76d885eaf481dbf11806e7d9674281c1599f28c38f39ba6b7ae6

doc/src/ppxlib.astlib/encoding_503.ml.html

Source file encoding_503.ml

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module Ext_name = struct
  let ppat_effect = "ppxlib.migration.ppat_effect_503"
end

let invalid_encoding ~loc name = Error.invalid_encoding ~loc ~version:"5.3" name

module To_502 = struct
  let encode_ppat_effect ~loc ~effect_ ~k =
    let open Ast_502.Parsetree in
    Ppat_extension
      ( Location.{ txt = Ext_name.ppat_effect; loc },
        PPat
          ( {
              ppat_desc = Ppat_tuple [ effect_; k ];
              ppat_attributes = [];
              ppat_loc_stack = [];
              ppat_loc = loc;
            },
            None ) )

  let decode_ppat_effect ~loc payload =
    let open Ast_502.Parsetree in
    match payload with
    | PPat ({ ppat_desc = Ppat_tuple [ effect_; cont ]; _ }, None) ->
        (effect_, cont)
    | _ -> invalid_encoding ~loc Ext_name.ppat_effect
end