Release 0.38.0 CHANGES: - Add support for OCaml 5.5 (#622, @patricoferris, @NathanReb) - Add support for OCaml 5.4 bivariant type parameters, they can now be used alongside ppx-es. (#629, @NathanReb) - Add `Attribute.Floating.declare_with_attr_loc` and `.declare_with_name_loc`, by analogy to the same functions at top level of `Attribute`. (#631, @ceastlund) - Migrate `Ptyp_open` nodes using an extension point (#625, @patricoferris) - Add Ast_builder and Ast_pattern utilities to manipulate encoded effect patterns (#624, @NathanReb) - Fix a bug where ppat_effects would be encoded/decoded instead of copied by the 5.4 <-> 5.3 migrations (#624, @NathanReb) - Fix infinite loop when duplicate attributes are present, raising an error instead (#613, @ceastlund, @patricoferris) - Ignore extensions inside attributes for the unused extension check (#616, @Skepfyr) - Fix a bug that inserted `Location.none` into `Longident`s when using OCaml 5.4 and above (#619, @patricoferris) - Add support for OCaml 5.4 labeled tuples, they can now be used alongside ppx-es. Also adds Ast_builder and Ast_pattern utilities to manipulate them. (#607, @NathanReb)

Release 0.37.0 CHANGES: - Add initial OCaml 5.4 support (#570, @patricoferris, @NathanReb) - Add `Longident.to/of_compiler` to astlib to simplify maintenance of ppx-es that interacts with other parts of the compiler-libs such as the type checker. (#603, @NathanReb) - Fix a bug where some infix operators such as `mod` would be printed as raw identifiers by our `Pprintast`. (#601, @NathanReb) - Fix 5.2 -> 5.3 migration of constants. Those used to always have a `none` location which can lead to unhelpful error messages. (#569, @NathanReb) - Add a new context-free rule type that replaces AST nodes that have the registered attributes attached to them. (#574, @Skepfyr) - Allow users to derive code from module bindings and module declarations (#576, @patricoferris) - Expose `Ppxlib.Location.Error.t = Astlib.Location.Error.t` (#593, @ceastlund) - Add `@@@ppxlib.inline.end`, deprecate `@@@deriving.end`. (#594, @ceastlund) - Clean the AST of any ppxlib migration attributes whenever printing using Pretty_print mode and the use_compiler_pp flag. (#598, @patricoferris) - Add custom printer support to `pp_ast` functions via the `?printer` config parameter. (#526, @pedrobslisboa)

Release 0.36.2 CHANGES: - Make Ast_builder's default `value_binding` constructor generate the proper `pvb_constraint` from the pattern and expression arguments. (#589, @NathanReb) - Fix pprintast to output correct syntax from `Ppat_constraint (pat, Ptyp_poly ...)` nodes until they are completely dropped. (#588, @NathanReb)

Release 0.36.1 CHANGES: - Fix ppxlib driver's AST to source printer. Our copy of pprintast was not properly updated which resulted in incorrect printing of value bindings' constraints (#585, @NathanReb)

Release 0.36.0 CHANGES: - Change `Location.none` to match the compiler's `Location.none` as of OCaml 4.08. This fixes a bug in `loc_of_attribute` (#540, @ncik-roberts, @patricoferris) - Bump ppxlib's AST to 5.2.0 (#514, @patricoferris) - Add the `[@@@expand_inline]` transformation and support for floating attribute context free transformations. (#560, @jaymody) - Add a `-raise-embedded-errors` flag to the driver. Setting this flag raises the first `ocaml.error` embedded in the final AST. - Export `Ast_pattern.fail`. (#563, @ceastlund) - Make `Ast_traverse.sexp_of` more concise, and add a test. (#561, @ceastlund)

Release 0.35.0 CHANGES: - Allow use of effect syntax in preprocessed files without causing migration failures. (#552, @hhugo, @NathanReb) - Remove support for compilers older than 4.08 (#556, @NathanReb) - Add a `--use-compiler-pp` flag to the standalone driver. This flag can be set when the driver outputs source code to make it use the compiler's `Pprintast` instead of ppxlib's. (#555, @NathanReb)

Release 0.34.0 CHANGES: 5.3 support is being added gradually over the course of its development. This section should be updated with each relevant PR. Note to maintainers: until 5.3 support is officially released, this section should be excluded from the release, see [RELEASING.md](RELEASING.md) for details. - Add initial OCaml 5.3 support (#487, @NathanReb, @hhugo, @nojb) - Initialise OCaml 5.3's lexer with the `keywords` setting from `OCAMLPARAM` or the new `-keywords` driver's CLI option to allow the standalone ppx driver to process old packages using `effect` as an identifier (#535, @dra27, @NathanReb) - Add `Pprintast.binding`, `longident` and `payload` (#542, @mattiasdrp) - Fix `deriving_inline` round-trip check so that it works with 5.01 <-> 5.02 migrations (#519, @NathanReb) - Add ppxlib's AST pretty-printing utilities in `Ppxlib.Pp_ast` and a `ppxlib-pp-ast` executable in a new separate `ppxlib-tools` package (#517, #525, #537, @NathanReb) - Change `-dparsetree` from a sexp output to a pretty printed AST, closer to what the compiler's `-dparsetree` is. (#530, @NathanReb) - Add Parsetree documentation comments to `Ast_builder` functions (#518, @patricoferris) - Support class type declarations in derivers with the new, optional arguments `{str,sig}_class_type_decl` in `Deriving.add` (#538, @patricoferris)

Release 0.33.0 CHANGES: - Fix a bug where `Code_path.main_module_name` would not properly remove extensions from the filename and therefore return an invalid module name. (#512, @NathanReb) - Add `-unused-type-warnings` flag to the driver to allow users to disable only the generation of warning 34 silencing structure items when using `[@@deriving ...]` on type declarations. (#511, @mbarbin, @NathanReb) - Make `-unused-code-warnings` flag to the driver also controls the generation of warning 34 silencing structure items when using `[@@deriving ...]` on type declarations. (#510, @mbarbin, @NathanReb) - Driver: Add `-unused-code-warnings=force` command-line flag argument. (#490, @mbarbin) - new functions `Ast_builder.{e,p}list_tail` that take an extra tail expression/pattern argument parameter compared to `Ast_builder.{e,p}list`, so they can build ASTs like `a :: b :: c` instead of only `[ a; b ]`. (#498, #502, @v-gb, @NathanReb) - Fix `Longident.parse` so it also handles indexing operators such as `.!()`, `.%(;..)<-`, or `Vec.(.%())` (#494, @Octachron) - Add a `special_function'` variant which directly takes a `Longident.t` argument to avoid the issue that `Longident.t` cover distinct syntaxic classes which cannot be easily parsed by a common parser (#496, @Octachron). - Keep location ranges consistent when migrating `Pexp_function` nodes from 5.2+ to older versions (#504, @jchavarri) - Fix `-locations-check` behaviour so it is no longer required to pass `-check` as well to enable location checks. (#506, @NathanReb)

Release 0.32.1 CHANGES: - Add support for OCaml 5.2 - Insert errors from caught located exceptions in place of the code that should have been generated by context-free rules. (#472, @NathanReb)

Release 0.32.0 CHANGES: - Add an optional `embed_errors` argument to `Context_free.map_top_down` that controls how to deal with exceptions thrown by context-free rules. (#468, @NathanReb) - Fix `Longident.parse` so it properly handles unparenthesized dotted operators such as `+.` or `*.`. (#111, @rgrinberg, @NathanReb) - raising an exception does no longer cancel the whole context free phase(#453, @Burnleydev1) - Sort embedded errors that are appended to the AST by location so the compiler reports the one closer to the beginning of the file first. (#463, @NathanReb) - Update `Attribute.get` to ignore `loc_ghost`. (#460, @ceastlund) - Add API to manipulate attributes that are used as flags (#408, @dianaoigo) - Update changelog to use ISO 8061 date format: YYYY-MM-DD. (#445, @ceastlund) - Replace `Caml` with `Stdlib`. (#427, @ceastlund) - When a transformation raises, the last valid AST is used as input to the upcoming transformations. All such errors are collected and appended as extension nodes to the final AST (#447, @Burnleydev1) - Fix a small mistake in the man pages: Embededding errors is done by default with `-as-pp`, not with `-dump-ast` (#464, @pitag-ha) - Set appropriate binary mode when writing to `stdout` especially for Windows compatibility. (#466, @jonahbeckford)