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Merlin 5.2.1-502 for OCaml 5.2 and 4.17.1 for OCaml 5.1 and 4.14

We are happy to announce the joint release of Merlin 5.2.1-502 and 4.17.1. This release adds many new features to Merlin including the ability to add hints to a source tree, serch for values using a type signature and expanding PPX annotations to preview their source code. There are also bug fixes for both the Merlin binary and editor modes.

More information can be found in the Discuss announcement.

Contributions are always welcome at Merlin | Issues

See full changelog
  • merlin binary
    • A new WRAPPING_PREFIX configuration directive that can be used to tell Merlin what to append to the current unit name in the presence of wrapping (ocaml/merlin#1788)
    • Add -unboxed-types and -no-unboxed-types as OCaml ignored flags (ocaml/merlin#1795, fixes ocaml/merlin#1794)
    • Destruct: Refinement in the presence of optional arguments (ocaml/merlin#1800 ocaml/merlin#1807, fixes ocaml/merlin#1770)
    • Implement new expand-node command for expanding PPX annotations (ocaml/merlin#1745)
    • Implement new inlay-hints command for adding hints on a source tree (ocaml/merlin#1812)
    • Implement new search-by-type command for searching values by types (ocaml/merlin#1828)
    • Canonicalise paths in occurrences. This helps deduplicate the results and
    • Show more user-friendly paths. (ocaml/merlin#1840)
    • Fix dot-merlin-reader ignoring SOURCE_ROOT and STDLIB directives (ocaml/merlin#1839, ocaml/merlin#1803)
  • editor modes
    • Vim:
      • Fix Python-3.12 syntax warnings in merlin.py (ocaml/merlin#1798)
      • Dead code / doc removal for previously deleted MerlinPhrase command (ocaml/merlin#1804)
    • Emacs:
      • Improve the way that result of polarity search is displayed (#1814)
      • Add merlin-search-by-type, merlin-search-by-polarity and change the behaviour of merlin-search to switch between by-type or by-polarity depending on the query (ocaml/merlin#1828)