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-0.38.0.tbz
sha256=89e049b3102f6670a213d34d802ea3ab0fc530a8959d2f1a1e8db830063429a3
sha512=2fbbf124fc61e1f22242d13505e9af39d4a3c7cf03def1c33ee8bd915195be9b817636667302e9c6ceddc74a9a4a54926340e21c96fd770a2bc6752400315cfd

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 =
  Location.raise_errorf ~loc "Invalid %s encoding" 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