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 (24)

Authors

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

Maintainers

  1. O
    opensource@janestreet.com

Sources

ppxlib-0.37.0.tbz
sha256=2e223837e7cecc3bc84a432432c0a72f4e1d5be9165c9c33772f156db85db0b3
sha512=78c62c6de7a641b950de9b4b744841c8823918c545046693e291077adfcd069a812094c11d8d51f792c0b5f340307d38f452ff0a92520df63ed17a3ca9922e2e

Description

Ppxlib is the standard infrastructure for ppx rewriters and other programs that manipulate the in-memory representation of OCaml programs, a.k.a the "Parsetree".

It also comes bundled with two ppx rewriters that are commonly used to write tools that manipulate and/or generate Parsetree values; ppxlib.metaquot which allows to construct Parsetree values using the OCaml syntax directly and ppxlib.traverse which provides various ways of automatically traversing values of a given type, in particular allowing to inject a complex structured value into generated code.

Published: 14 Oct 2025

README

Ppxlib - Meta-programming for OCaml

ocaml-ci status trunk-build-status AppVeyor status

Ppxlib documentation

Overview

Ppxlib is the standard library for ppx rewriters and other programs that manipulate the in-memory representation of OCaml programs, a.k.a. the "Parsetree".

It also comes bundled with two ppx rewriters that are commonly used to write tools that manipulate and/or generate Parsetree values: ppxlib.metaquot, which allows constructing Parsetree values using the OCaml syntax directly, and ppxlib.traverse, which provides various ways of automatically traversing values of a given type, in particular allowing to inject a complex structured value into generated code.

For more information about ppxlib and how to use it, please consult the documentation.

What is the relation between ppxlib and other ppx libraries?

The ppx world has a long and storied history, and if you look around, you may find other projects that offer functionalities similar to ppxlib. The following blog post gives a good overview of the various libraries that have been developed over time. At this point, ppxlib is considered the de facto library for writing ppx rewriters.

History of the project

This repository was created by merging several older smaller projects that were developed at Jane Street. See the history for more details.

Dependencies (6)

  1. stdlib-shims
  2. sexplib0 >= "v0.12"
  3. ppx_derivers >= "1.0"
  4. ocaml-compiler-libs >= "v0.11.0"
  5. ocaml >= "4.08.0" & < "5.5.0"
  6. dune >= "3.8"

Dev Dependencies (6)

  1. odoc with-doc
  2. ocamlformat with-dev-setup & = "0.26.2"
  3. cinaps with-test & >= "v0.12.1"
  4. re with-test & >= "1.9.0"
  5. ocamlfind with-test
  6. sexplib0 with-test & >= "v0.15"

  1. arrayjit != "0.5.2"
  2. awsm-codegen
  3. bam-ppx >= "0.4"
  4. base_quickcheck >= "v0.17.1"
  5. bistro >= "0.6.0"
  6. bonsai >= "v0.16.0"
  7. bytestring
  8. clangml >= "4.7.0"
  9. cmdlang-to-base
  10. comby < "1.3.0"
  11. commons
  12. crs
  13. diff
  14. diffast-misc = "0.3.5.1"
  15. dream-html >= "3.11.2"
  16. dune >= "3.17.2"
  17. dunolint
  18. dunolint-lib < "0.0.20251006"
  19. dunolint-lib-base
  20. ego
  21. eliom >= "8.9.0"
  22. elpi >= "3.3.1"
  23. embedded_ocaml_templates < "0.3.1" | >= "0.7"
  24. extunix >= "0.4.4"
  25. frama-c >= "32.0~beta"
  26. fsml
  27. fstar >= "2025.06.20"
  28. GT = "0.5.1"
  29. gen_js_api < "1.0.8" | >= "1.1.1"
  30. genprint = "0.3"
  31. goblint >= "2.5.0"
  32. hack_parallel >= "1.0.1"
  33. hardcaml >= "v0.14.1" & != "v0.17.0"
  34. html_of_jsx >= "0.0.2"
  35. http_async
  36. js_of_ocaml >= "3.8.0"
  37. js_of_ocaml-compiler >= "6.1.0"
  38. js_of_ocaml-lwt >= "3.10.0" & < "6.1.0"
  39. js_of_ocaml-ocamlbuild >= "3.10.0" & < "5.0"
  40. js_of_ocaml-ppx >= "6.1.0"
  41. js_of_ocaml-ppx_deriving_json >= "3.7.1"
  42. js_of_ocaml-toplevel >= "3.10.0"
  43. js_of_ocaml-tyxml >= "3.10.0" & < "6.1.0"
  44. lablqml >= "0.7"
  45. lascar >= "0.7.0"
  46. learn-ocaml
  47. learn-ocaml-client
  48. lens >= "1.2.5"
  49. logs-ppx
  50. lwt_ppx >= "5.9.2"
  51. MlFront_Cli >= "2.1.4~prerel2" & < "2.3.1"
  52. MlFront_Config
  53. MlFront_Manip
  54. melange-json >= "1.2.0"
  55. melange-json-native
  56. merlin >= "4.7-412"
  57. metaquot >= "0.5.0"
  58. mlt_parser = "v0.13.0" | >= "v0.14.1"
  59. mlx
  60. neural_nets_lib != "0.5.2"
  61. noCanren >= "0.3.0~alpha1"
  62. node_of_ocaml
  63. nuscr >= "2.0.0"
  64. OCanren-ppx >= "0.3.0"
  65. obus >= "1.2.5"
  66. ocaml-monadic >= "0.5"
  67. ocamlmerlin-mlx
  68. ocf_ppx >= "1.0.0"
  69. ocsigen-i18n >= "4.0.0"
  70. octez-internal-libs
  71. ojs_base_ppx
  72. ometrics = "0.2.0"
  73. ortac-core
  74. ortac-qcheck-stm
  75. ortac-wrapper
  76. pancake
  77. pgocaml_ppx >= "4.3.0"
  78. pla >= "2.0"
  79. ppx-owl-opt
  80. ppx_accessor >= "v0.14.3"
  81. ppx_assert >= "v0.13.0"
  82. ppx_bap
  83. ppx_base >= "v0.13.0"
  84. ppx_bench >= "v0.17.1"
  85. ppx_bin_prot >= "v0.17.1"
  86. ppx_bitstring >= "5.0.0"
  87. ppx_blob >= "0.7.2"
  88. ppx_catch
  89. ppx_cold
  90. ppx_compare >= "v0.13.0"
  91. ppx_compose >= "0.2.1"
  92. ppx_const >= "2.0.1"
  93. ppx_conv_func >= "v0.13.0"
  94. ppx_counters
  95. ppx_css
  96. ppx_cstruct >= "6.0.0"
  97. ppx_cstubs >= "0.6.1" & < "0.7.0"
  98. ppx_csv_conv >= "v0.13.0"
  99. ppx_custom_printf >= "v0.14.1"
  100. ppx_decimal
  101. ppx_defer >= "0.5.0"
  102. ppx_demo
  103. ppx_derive_at_runtime != "v0.17.0"
  104. ppx_deriving >= "6.1.0"
  105. ppx_deriving_cad
  106. ppx_deriving_decoders < "0.2"
  107. ppx_deriving_encoding >= "0.4.2"
  108. ppx_deriving_ezjsonm >= "0.4.1"
  109. ppx_deriving_hardcaml >= "v0.13.0"
  110. ppx_deriving_hash >= "0.1.3"
  111. ppx_deriving_jsonschema
  112. ppx_deriving_jsont
  113. ppx_deriving_madcast >= "0.2"
  114. ppx_deriving_popper
  115. ppx_deriving_protobuf >= "3.0.0"
  116. ppx_deriving_qcheck
  117. ppx_deriving_scad
  118. ppx_deriving_variant_string
  119. ppx_deriving_yaml >= "0.4.1"
  120. ppx_deriving_yojson >= "3.10.0"
  121. ppx_diff >= "v0.17.1"
  122. ppx_disable_unused_warnings
  123. ppx_dream_eml
  124. ppx_embed_file
  125. ppx_enumerate >= "v0.13.0"
  126. ppx_expect = "v0.16.2" | >= "v0.17.3"
  127. ppx_expect_nobase
  128. ppx_factory = "0.1.0" | >= "0.2.0"
  129. ppx_fail >= "v0.13.0"
  130. ppx_fields_conv >= "v0.14.2"
  131. ppx_fixed_literal
  132. ppx_format
  133. ppx_fun
  134. ppx_gen_rec >= "2.0.0"
  135. ppx_getenv >= "2.1"
  136. ppx_globalize >= "v0.17.2"
  137. ppx_hardcaml
  138. ppx_hash >= "v0.13.0"
  139. ppx_here >= "v0.13.0"
  140. ppx_ignore_instrumentation
  141. ppx_import < "1.8.0" | >= "1.11.0"
  142. ppx_inline_test >= "v0.17.1"
  143. ppx_interact >= "0.2.0"
  144. ppx_irmin >= "3.0.0"
  145. ppx_jane >= "v0.13.0"
  146. ppx_js_style >= "v0.17.1"
  147. ppx_jsobject_conv = "0.8.0" | >= "0.21.1"
  148. ppx_jsonaf_conv >= "v0.15.1" & != "v0.17.0"
  149. ppx_let >= "v0.17.1"
  150. ppx_log
  151. ppx_lun >= "0.0.2"
  152. ppx_map
  153. ppx_matches >= "0.1.0"
  154. ppx_mica
  155. ppx_minidebug != "2.2.0"
  156. ppx_module_timer >= "v0.13.0"
  157. ppx_monad
  158. ppx_monoid >= "0.3.3"
  159. ppx_mysql >= "1.1.3"
  160. ppx_open
  161. ppx_optcomp >= "v0.17.1"
  162. ppx_optint
  163. ppx_optional >= "v0.13.0"
  164. ppx_partial
  165. ppx_pattern_bind >= "v0.13.1" & != "v0.17.0"
  166. ppx_pipebang >= "v0.13.0"
  167. ppx_protocol_conv >= "5.2.3"
  168. ppx_pyformat
  169. ppx_python >= "v0.15.0"
  170. ppx_quick_test >= "v0.17.1"
  171. ppx_seq
  172. ppx_sexp_conv >= "v0.17.1"
  173. ppx_sexp_message >= "v0.14.1"
  174. ppx_sexp_value >= "v0.13.0"
  175. ppx_show >= "0.2.0"
  176. ppx_stable >= "v0.17.1"
  177. ppx_stable_witness
  178. ppx_string >= "v0.14.1"
  179. ppx_string_conv
  180. ppx_string_interpolation
  181. ppx_subliner
  182. ppx_system
  183. ppx_ts
  184. ppx_tydi >= "v0.17.1"
  185. ppx_type_directed_value
  186. ppx_typed_fields != "v0.17.0"
  187. ppx_typerep_conv >= "v0.17.1"
  188. ppx_units
  189. ppx_unreachable
  190. ppx_update
  191. ppx_variants_conv >= "v0.17.1"
  192. ppx_viewpattern >= "0.1.1"
  193. ppx_xml_conv >= "v0.13.0"
  194. ppx_yojson_conv >= "v0.15.1" & != "v0.17.0"
  195. ppxlib-tools >= "0.37.0"
  196. ppxlib_jane >= "v0.17.3"
  197. qcow = "0.11.0"
  198. rdf_ppx
  199. reason >= "3.16.0"
  200. reason-react-ppx >= "0.13.0" & < "0.14.1"
  201. refl >= "0.4.1"
  202. res_tailwindcss
  203. sedlex >= "3.4"
  204. serde_derive
  205. server-reason-react
  206. speed
  207. spin >= "0.8.0"
  208. stdint-literals
  209. stk_ppx
  210. streamable != "v0.17.0"
  211. styled-ppx
  212. togglelog
  213. toplevel_expect_test >= "v0.14.1"
  214. tyxml-jsx >= "4.5.0"
  215. tyxml-syntax >= "4.5.0"
  216. visitors = "20210608" | >= "20251010"
  217. vlt >= "0.2.5"
  218. volgo < "0.0.21"
  219. volgo-base
  220. volgo-git-backend < "0.0.21"
  221. volgo-git-eio < "0.0.21"
  222. volgo-git-unix < "0.0.21"
  223. volgo-hg-backend < "0.0.21"
  224. volgo-hg-eio < "0.0.21"
  225. volgo-hg-unix < "0.0.21"
  226. volgo-vcs < "0.0.21"
  227. wasm_of_ocaml-compiler
  228. wtr < "3.0.0"
  229. wtr-ppx
  230. xtmpl_ppx >= "1.1.0"

Conflicts (3)

  1. ocaml-variants = "5.1.0~alpha1+options"
  2. ocaml-base-compiler = "5.1.0~alpha1"
  3. ocaml-migrate-parsetree < "2.0.0"