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Break around comments following an infix operator #2478

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merged 2 commits into from
Dec 14, 2023

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gpetiot
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@gpetiot gpetiot commented Nov 9, 2023

Fix #2057

I'm opening this PR to get feedback on the new output. The ambiguity of where to place comments here is annoying, the solution is drastic, but I find the result easier to read.

@gpetiot gpetiot requested a review from Julow November 9, 2023 00:46
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I like the new output. This is a rare situation I hope and being more sparse doesn't hurt.
I had to debug instability problems due to this formatting in the past.

@gpetiot gpetiot marked this pull request as ready for review November 10, 2023 16:57
@gpetiot gpetiot force-pushed the break-around-infix-op-comments branch from f6c0b10 to b025b49 Compare November 24, 2023 09:02
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gpetiot commented Nov 24, 2023

@jberdine do you object to the new formatting before I merge?

it looks suboptimal in some instances (x + (* xxx *) x gets split) when it used to be formatted fine, but there is no easy way to fix the bug and preserve these cases.

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jberdine commented Nov 24, 2023 via email

@gpetiot gpetiot requested a review from jberdine November 27, 2023 01:57
@gpetiot gpetiot force-pushed the break-around-infix-op-comments branch from b025b49 to 8fb5257 Compare December 7, 2023 07:52
@gpetiot gpetiot force-pushed the break-around-infix-op-comments branch from 8fb5257 to e901da8 Compare December 14, 2023 09:09
@gpetiot gpetiot merged commit 315ab42 into ocaml-ppx:main Dec 14, 2023
8 checks passed
@gpetiot gpetiot deleted the break-around-infix-op-comments branch December 14, 2023 09:24
Julow added a commit to Julow/opam-repository that referenced this pull request Nov 29, 2024
….27.0)

CHANGES:

### Highlight

- \* Support OCaml 5.2 syntax (ocaml-ppx/ocamlformat#2519, ocaml-ppx/ocamlformat#2544, ocaml-ppx/ocamlformat#2590, ocaml-ppx/ocamlformat#2596, ocaml-ppx/ocamlformat#2621, ocaml-ppx/ocamlformat#2628, @Julow, @EmileTrotignon, @hhugo)
  This includes local open in types, raw identifiers, and the new
  representation for functions.
  This might change the formatting of some functions due to the formatting code
  being completely rewritten.

- Support OCaml 5.3 syntax (ocaml-ppx/ocamlformat#2609, ocaml-ppx/ocamlformat#2610, ocaml-ppx/ocamlformat#2611, ocaml-ppx/ocamlformat#2622, ocaml-ppx/ocamlformat#2623, ocaml-ppx/ocamlformat#2562, ocaml-ppx/ocamlformat#2624, ocaml-ppx/ocamlformat#2625, ocaml-ppx/ocamlformat#2627, @Julow, @Zeta611)
  This adds support for effect patterns, short functor type arguments and utf8
  identifiers.
  To format code using the new `effect` syntax, add this option to your
  `.ocamlformat`:
  ```
  ocaml-version = 5.3
  ```

- Documentation comments are now formatted by default (ocaml-ppx/ocamlformat#2390, @Julow)
  Use the option `parse-docstrings = false` to restore the previous behavior.

- \* Consistent indentation of polymorphic variant arguments (ocaml-ppx/ocamlformat#2427, @Julow)
  Increases the indentation by one to make the formatting consistent with
  normal variants. For example:
  ```
    ...
    (* before *)
      (`Msg
        (foo bar))
    (* after *)
      (`Msg
         (foo bar))
  ```

- Build on OCaml 5.3 (ocaml-ppx/ocamlformat#2603, @adamchol, @Julow)

### Added

- Improve the emacs plugin (ocaml-ppx/ocamlformat#2577, ocaml-ppx/ocamlformat#2600, @gridbugs, @thibautbenjamin)
  Allow a custom command to be used to run ocamlformat and add compatibility
  with emacs ocaml tree-sitter modes.

- Added option `let-binding-deindent-fun` (ocaml-ppx/ocamlformat#2521, @henrytill)
  to control the indentation of the `fun` in:
  ```
  let f =
   fun foo ->
    bar
  ```

- Added back the flag `--disable-outside-detected-project` (ocaml-ppx/ocamlformat#2439, @gpetiot)
  It was removed in version 0.22.

- Support newer Odoc syntax (ocaml-ppx/ocamlformat#2631, ocaml-ppx/ocamlformat#2632, ocaml-ppx/ocamlformat#2633, @Julow)

### Changed

- \* Consistent formatting of comments (ocaml-ppx/ocamlformat#2371, ocaml-ppx/ocamlformat#2550, @Julow)
  This is mostly an internal change but some comments might be formatted differently.

- \* Improve formatting of type constraints with type variables (ocaml-ppx/ocamlformat#2437, @gpetiot)
  For example:
  ```
  let f : type a b c.
      a -> b -> c =
    ...
  ```

- \* Improve formatting of functor arguments (ocaml-ppx/ocamlformat#2505, @Julow)
  This also reduce the indentation of functor arguments with long signatures.

- Improvements to the Janestreet profile (ocaml-ppx/ocamlformat#2445, ocaml-ppx/ocamlformat#2314, ocaml-ppx/ocamlformat#2460, ocaml-ppx/ocamlformat#2593, ocaml-ppx/ocamlformat#2612, @Julow, @tdelvecchio-jsc)

- \* Undo let-bindings and methods normalizations (ocaml-ppx/ocamlformat#2523, ocaml-ppx/ocamlformat#2529, @gpetiot)
  This remove the rewriting of some forms of let-bindings and methods:
  + `let f x = (x : int)` is no longer rewritten into `let f x : int = x`
  + `let f (type a) (type b) ...` is no longer rewritten into `let f (type a b) ...`
  + `let f = fun x -> ...` is no longer rewritten into `let f x = ...`

- \* The `break-colon` option is now taken into account for method type constraints (ocaml-ppx/ocamlformat#2529, @gpetiot)

- \* Force a break around comments following an infix operator (fix non-stabilizing comments) (ocaml-ppx/ocamlformat#2478, @gpetiot)
  This adds a line break:
  ```
    a
    ||
    (* this comment is now on its own line *)
    b
  ```

### Fixed

- Fix placement of comments in some cases (ocaml-ppx/ocamlformat#2471, ocaml-ppx/ocamlformat#2503, ocaml-ppx/ocamlformat#2506, ocaml-ppx/ocamlformat#2540, ocaml-ppx/ocamlformat#2541, ocaml-ppx/ocamlformat#2592, ocaml-ppx/ocamlformat#2617, @gpetiot, @Julow)
  Some comments were being moved or causing OCamlformat to crash.
  OCamlformat refuses to format if a comment would be missing in its output, to avoid loosing code.

- Fix attributes being dropped or moved (ocaml-ppx/ocamlformat#2247, ocaml-ppx/ocamlformat#2459, ocaml-ppx/ocamlformat#2551, ocaml-ppx/ocamlformat#2564, ocaml-ppx/ocamlformat#2602, @EmileTrotignon, @tdelvecchio-jsc, @Julow)
  OCamlformat refuses to format if the formatted code has a different meaning than the original code, for example, if an attribute is removed.
  We also try to avoid moving attributes even if that doesn't change the original code, for example we no longer format `open[@attr] M` as `open M [@@attr]`.

- Remove trailing space inside a wrapping empty signature (ocaml-ppx/ocamlformat#2443, @Julow)
- Fix extension-point spacing in structures (ocaml-ppx/ocamlformat#2450, @Julow)
- \* Consistent break after string constant argument (ocaml-ppx/ocamlformat#2453, @Julow)
- \* Fix cinaps comment formatting to not change multiline string contents (ocaml-ppx/ocamlformat#2463, @tdelvecchio-jsc)
- \* Fix the indentation of tuples in attributes and extensions (ocaml-ppx/ocamlformat#2488, @Julow)
- \* Fix weird indentation and line breaks after comments (ocaml-ppx/ocamlformat#2507, ocaml-ppx/ocamlformat#2589, ocaml-ppx/ocamlformat#2606, @Julow)
- \* Fix unwanted alignment in if-then-else (ocaml-ppx/ocamlformat#2511, @Julow)
- Fix missing parentheses around constraint expressions with attributes (ocaml-ppx/ocamlformat#2513, @alanechang)
- Fix formatting of type vars in GADT constructors (ocaml-ppx/ocamlformat#2518, @Julow)
- Fix `[@ocamlformat "disable"]` in some cases (ocaml-ppx/ocamlformat#2242, ocaml-ppx/ocamlformat#2525, @EmileTrotignon)
  This caused a bug inside `class type` constructs and when attached to a `let ... in`
- Display `a##b` instead of `a ## b` and similarly for operators that start with # (ocaml-ppx/ocamlformat#2580, @v-gb)
- \* Fix arrow type indentation with `break-separators=before` (ocaml-ppx/ocamlformat#2598, @Julow)
- Fix missing parentheses around a let in class expressions (ocaml-ppx/ocamlformat#2599, @Julow)
- Fix formatting of paragraphs in lists in documentation (ocaml-ppx/ocamlformat#2607, @Julow)
- Avoid unwanted space in references and links text in documentation (ocaml-ppx/ocamlformat#2608, @Julow)
- \* Improve the indentation of attributes in patterns (ocaml-ppx/ocamlformat#2613, @Julow)
- \* Avoid large indentation in patterns after `let%ext` (ocaml-ppx/ocamlformat#2615, @Julow)
Julow added a commit to Julow/opam-repository that referenced this pull request Nov 29, 2024
….27.0)

CHANGES:

### Highlight

- \* Support OCaml 5.2 syntax (ocaml-ppx/ocamlformat#2519, ocaml-ppx/ocamlformat#2544, ocaml-ppx/ocamlformat#2590, ocaml-ppx/ocamlformat#2596, ocaml-ppx/ocamlformat#2621, ocaml-ppx/ocamlformat#2628, @Julow, @EmileTrotignon, @hhugo)
  This includes local open in types, raw identifiers, and the new
  representation for functions.
  This might change the formatting of some functions due to the formatting code
  being completely rewritten.

- Support OCaml 5.3 syntax (ocaml-ppx/ocamlformat#2609, ocaml-ppx/ocamlformat#2610, ocaml-ppx/ocamlformat#2611, ocaml-ppx/ocamlformat#2622, ocaml-ppx/ocamlformat#2623, ocaml-ppx/ocamlformat#2562, ocaml-ppx/ocamlformat#2624, ocaml-ppx/ocamlformat#2625, ocaml-ppx/ocamlformat#2627, @Julow, @Zeta611)
  This adds support for effect patterns, short functor type arguments and utf8
  identifiers.
  To format code using the new `effect` syntax, add this option to your
  `.ocamlformat`:
  ```
  ocaml-version = 5.3
  ```

- Documentation comments are now formatted by default (ocaml-ppx/ocamlformat#2390, @Julow)
  Use the option `parse-docstrings = false` to restore the previous behavior.

- \* Consistent indentation of polymorphic variant arguments (ocaml-ppx/ocamlformat#2427, @Julow)
  Increases the indentation by one to make the formatting consistent with
  normal variants. For example:
  ```
    ...
    (* before *)
      (`Msg
        (foo bar))
    (* after *)
      (`Msg
         (foo bar))
  ```

- Build on OCaml 5.3 (ocaml-ppx/ocamlformat#2603, @adamchol, @Julow)

### Added

- Improve the emacs plugin (ocaml-ppx/ocamlformat#2577, ocaml-ppx/ocamlformat#2600, @gridbugs, @thibautbenjamin)
  Allow a custom command to be used to run ocamlformat and add compatibility
  with emacs ocaml tree-sitter modes.

- Added option `let-binding-deindent-fun` (ocaml-ppx/ocamlformat#2521, @henrytill)
  to control the indentation of the `fun` in:
  ```
  let f =
   fun foo ->
    bar
  ```

- Added back the flag `--disable-outside-detected-project` (ocaml-ppx/ocamlformat#2439, @gpetiot)
  It was removed in version 0.22.

- Support newer Odoc syntax (ocaml-ppx/ocamlformat#2631, ocaml-ppx/ocamlformat#2632, ocaml-ppx/ocamlformat#2633, @Julow)

### Changed

- \* Consistent formatting of comments (ocaml-ppx/ocamlformat#2371, ocaml-ppx/ocamlformat#2550, @Julow)
  This is mostly an internal change but some comments might be formatted differently.

- \* Improve formatting of type constraints with type variables (ocaml-ppx/ocamlformat#2437, @gpetiot)
  For example:
  ```
  let f : type a b c.
      a -> b -> c =
    ...
  ```

- \* Improve formatting of functor arguments (ocaml-ppx/ocamlformat#2505, @Julow)
  This also reduce the indentation of functor arguments with long signatures.

- Improvements to the Janestreet profile (ocaml-ppx/ocamlformat#2445, ocaml-ppx/ocamlformat#2314, ocaml-ppx/ocamlformat#2460, ocaml-ppx/ocamlformat#2593, ocaml-ppx/ocamlformat#2612, @Julow, @tdelvecchio-jsc)

- \* Undo let-bindings and methods normalizations (ocaml-ppx/ocamlformat#2523, ocaml-ppx/ocamlformat#2529, @gpetiot)
  This remove the rewriting of some forms of let-bindings and methods:
  + `let f x = (x : int)` is no longer rewritten into `let f x : int = x`
  + `let f (type a) (type b) ...` is no longer rewritten into `let f (type a b) ...`
  + `let f = fun x -> ...` is no longer rewritten into `let f x = ...`

- \* The `break-colon` option is now taken into account for method type constraints (ocaml-ppx/ocamlformat#2529, @gpetiot)

- \* Force a break around comments following an infix operator (fix non-stabilizing comments) (ocaml-ppx/ocamlformat#2478, @gpetiot)
  This adds a line break:
  ```
    a
    ||
    (* this comment is now on its own line *)
    b
  ```

### Fixed

- Fix placement of comments in some cases (ocaml-ppx/ocamlformat#2471, ocaml-ppx/ocamlformat#2503, ocaml-ppx/ocamlformat#2506, ocaml-ppx/ocamlformat#2540, ocaml-ppx/ocamlformat#2541, ocaml-ppx/ocamlformat#2592, ocaml-ppx/ocamlformat#2617, @gpetiot, @Julow)
  Some comments were being moved or causing OCamlformat to crash.
  OCamlformat refuses to format if a comment would be missing in its output, to avoid loosing code.

- Fix attributes being dropped or moved (ocaml-ppx/ocamlformat#2247, ocaml-ppx/ocamlformat#2459, ocaml-ppx/ocamlformat#2551, ocaml-ppx/ocamlformat#2564, ocaml-ppx/ocamlformat#2602, @EmileTrotignon, @tdelvecchio-jsc, @Julow)
  OCamlformat refuses to format if the formatted code has a different meaning than the original code, for example, if an attribute is removed.
  We also try to avoid moving attributes even if that doesn't change the original code, for example we no longer format `open[@attr] M` as `open M [@@attr]`.

- Remove trailing space inside a wrapping empty signature (ocaml-ppx/ocamlformat#2443, @Julow)
- Fix extension-point spacing in structures (ocaml-ppx/ocamlformat#2450, @Julow)
- \* Consistent break after string constant argument (ocaml-ppx/ocamlformat#2453, @Julow)
- \* Fix cinaps comment formatting to not change multiline string contents (ocaml-ppx/ocamlformat#2463, @tdelvecchio-jsc)
- \* Fix the indentation of tuples in attributes and extensions (ocaml-ppx/ocamlformat#2488, @Julow)
- \* Fix weird indentation and line breaks after comments (ocaml-ppx/ocamlformat#2507, ocaml-ppx/ocamlformat#2589, ocaml-ppx/ocamlformat#2606, @Julow)
- \* Fix unwanted alignment in if-then-else (ocaml-ppx/ocamlformat#2511, @Julow)
- Fix missing parentheses around constraint expressions with attributes (ocaml-ppx/ocamlformat#2513, @alanechang)
- Fix formatting of type vars in GADT constructors (ocaml-ppx/ocamlformat#2518, @Julow)
- Fix `[@ocamlformat "disable"]` in some cases (ocaml-ppx/ocamlformat#2242, ocaml-ppx/ocamlformat#2525, @EmileTrotignon)
  This caused a bug inside `class type` constructs and when attached to a `let ... in`
- Display `a##b` instead of `a ## b` and similarly for operators that start with # (ocaml-ppx/ocamlformat#2580, @v-gb)
- \* Fix arrow type indentation with `break-separators=before` (ocaml-ppx/ocamlformat#2598, @Julow)
- Fix missing parentheses around a let in class expressions (ocaml-ppx/ocamlformat#2599, @Julow)
- Fix formatting of paragraphs in lists in documentation (ocaml-ppx/ocamlformat#2607, @Julow)
- Avoid unwanted space in references and links text in documentation (ocaml-ppx/ocamlformat#2608, @Julow)
- \* Improve the indentation of attributes in patterns (ocaml-ppx/ocamlformat#2613, @Julow)
- \* Avoid large indentation in patterns after `let%ext` (ocaml-ppx/ocamlformat#2615, @Julow)
Julow added a commit to Julow/opam-repository that referenced this pull request Dec 2, 2024
….27.0)

CHANGES:

### Highlight

- \* Support OCaml 5.2 syntax (ocaml-ppx/ocamlformat#2519, ocaml-ppx/ocamlformat#2544, ocaml-ppx/ocamlformat#2590, ocaml-ppx/ocamlformat#2596, ocaml-ppx/ocamlformat#2621, ocaml-ppx/ocamlformat#2628, @Julow, @EmileTrotignon, @hhugo)
  This includes local open in types, raw identifiers, and the new
  representation for functions.
  This might change the formatting of some functions due to the formatting code
  being completely rewritten.

- Support OCaml 5.3 syntax (ocaml-ppx/ocamlformat#2609, ocaml-ppx/ocamlformat#2610, ocaml-ppx/ocamlformat#2611, ocaml-ppx/ocamlformat#2622, ocaml-ppx/ocamlformat#2623, ocaml-ppx/ocamlformat#2562, ocaml-ppx/ocamlformat#2624, ocaml-ppx/ocamlformat#2625, ocaml-ppx/ocamlformat#2627, @Julow, @Zeta611)
  This adds support for effect patterns, short functor type arguments and utf8
  identifiers.
  To format code using the new `effect` syntax, add this option to your
  `.ocamlformat`:
  ```
  ocaml-version = 5.3
  ```

- Documentation comments are now formatted by default (ocaml-ppx/ocamlformat#2390, @Julow)
  Use the option `parse-docstrings = false` to restore the previous behavior.

- \* Consistent indentation of polymorphic variant arguments (ocaml-ppx/ocamlformat#2427, @Julow)
  Increases the indentation by one to make the formatting consistent with
  normal variants. For example:
  ```
    ...
    (* before *)
      (`Msg
        (foo bar))
    (* after *)
      (`Msg
         (foo bar))
  ```

- Build on OCaml 5.3 (ocaml-ppx/ocamlformat#2603, @adamchol, @Julow)

### Added

- Improve the emacs plugin (ocaml-ppx/ocamlformat#2577, ocaml-ppx/ocamlformat#2600, @gridbugs, @thibautbenjamin)
  Allow a custom command to be used to run ocamlformat and add compatibility
  with emacs ocaml tree-sitter modes.

- Added option `let-binding-deindent-fun` (ocaml-ppx/ocamlformat#2521, @henrytill)
  to control the indentation of the `fun` in:
  ```
  let f =
   fun foo ->
    bar
  ```

- Added back the flag `--disable-outside-detected-project` (ocaml-ppx/ocamlformat#2439, @gpetiot)
  It was removed in version 0.22.

- Support newer Odoc syntax (ocaml-ppx/ocamlformat#2631, ocaml-ppx/ocamlformat#2632, ocaml-ppx/ocamlformat#2633, @Julow)

### Changed

- \* Consistent formatting of comments (ocaml-ppx/ocamlformat#2371, ocaml-ppx/ocamlformat#2550, @Julow)
  This is mostly an internal change but some comments might be formatted differently.

- \* Improve formatting of type constraints with type variables (ocaml-ppx/ocamlformat#2437, @gpetiot)
  For example:
  ```
  let f : type a b c.
      a -> b -> c =
    ...
  ```

- \* Improve formatting of functor arguments (ocaml-ppx/ocamlformat#2505, @Julow)
  This also reduce the indentation of functor arguments with long signatures.

- Improvements to the Janestreet profile (ocaml-ppx/ocamlformat#2445, ocaml-ppx/ocamlformat#2314, ocaml-ppx/ocamlformat#2460, ocaml-ppx/ocamlformat#2593, ocaml-ppx/ocamlformat#2612, @Julow, @tdelvecchio-jsc)

- \* Undo let-bindings and methods normalizations (ocaml-ppx/ocamlformat#2523, ocaml-ppx/ocamlformat#2529, @gpetiot)
  This remove the rewriting of some forms of let-bindings and methods:
  + `let f x = (x : int)` is no longer rewritten into `let f x : int = x`
  + `let f (type a) (type b) ...` is no longer rewritten into `let f (type a b) ...`
  + `let f = fun x -> ...` is no longer rewritten into `let f x = ...`

- \* The `break-colon` option is now taken into account for method type constraints (ocaml-ppx/ocamlformat#2529, @gpetiot)

- \* Force a break around comments following an infix operator (fix non-stabilizing comments) (ocaml-ppx/ocamlformat#2478, @gpetiot)
  This adds a line break:
  ```
    a
    ||
    (* this comment is now on its own line *)
    b
  ```

### Fixed

- Fix placement of comments in some cases (ocaml-ppx/ocamlformat#2471, ocaml-ppx/ocamlformat#2503, ocaml-ppx/ocamlformat#2506, ocaml-ppx/ocamlformat#2540, ocaml-ppx/ocamlformat#2541, ocaml-ppx/ocamlformat#2592, ocaml-ppx/ocamlformat#2617, @gpetiot, @Julow)
  Some comments were being moved or causing OCamlformat to crash.
  OCamlformat refuses to format if a comment would be missing in its output, to avoid loosing code.

- Fix attributes being dropped or moved (ocaml-ppx/ocamlformat#2247, ocaml-ppx/ocamlformat#2459, ocaml-ppx/ocamlformat#2551, ocaml-ppx/ocamlformat#2564, ocaml-ppx/ocamlformat#2602, @EmileTrotignon, @tdelvecchio-jsc, @Julow)
  OCamlformat refuses to format if the formatted code has a different meaning than the original code, for example, if an attribute is removed.
  We also try to avoid moving attributes even if that doesn't change the original code, for example we no longer format `open[@attr] M` as `open M [@@attr]`.

- Remove trailing space inside a wrapping empty signature (ocaml-ppx/ocamlformat#2443, @Julow)
- Fix extension-point spacing in structures (ocaml-ppx/ocamlformat#2450, @Julow)
- \* Consistent break after string constant argument (ocaml-ppx/ocamlformat#2453, @Julow)
- \* Fix cinaps comment formatting to not change multiline string contents (ocaml-ppx/ocamlformat#2463, @tdelvecchio-jsc)
- \* Fix the indentation of tuples in attributes and extensions (ocaml-ppx/ocamlformat#2488, @Julow)
- \* Fix weird indentation and line breaks after comments (ocaml-ppx/ocamlformat#2507, ocaml-ppx/ocamlformat#2589, ocaml-ppx/ocamlformat#2606, @Julow)
- \* Fix unwanted alignment in if-then-else (ocaml-ppx/ocamlformat#2511, @Julow)
- Fix missing parentheses around constraint expressions with attributes (ocaml-ppx/ocamlformat#2513, @alanechang)
- Fix formatting of type vars in GADT constructors (ocaml-ppx/ocamlformat#2518, @Julow)
- Fix `[@ocamlformat "disable"]` in some cases (ocaml-ppx/ocamlformat#2242, ocaml-ppx/ocamlformat#2525, @EmileTrotignon)
  This caused a bug inside `class type` constructs and when attached to a `let ... in`
- Display `a##b` instead of `a ## b` and similarly for operators that start with # (ocaml-ppx/ocamlformat#2580, @v-gb)
- \* Fix arrow type indentation with `break-separators=before` (ocaml-ppx/ocamlformat#2598, @Julow)
- Fix missing parentheses around a let in class expressions (ocaml-ppx/ocamlformat#2599, @Julow)
- Fix formatting of paragraphs in lists in documentation (ocaml-ppx/ocamlformat#2607, @Julow)
- Avoid unwanted space in references and links text in documentation (ocaml-ppx/ocamlformat#2608, @Julow)
- \* Improve the indentation of attributes in patterns (ocaml-ppx/ocamlformat#2613, @Julow)
- \* Avoid large indentation in patterns after `let%ext` (ocaml-ppx/ocamlformat#2615, @Julow)
Julow added a commit to Julow/opam-repository that referenced this pull request Dec 2, 2024
….27.0)

CHANGES:

### Highlight

- \* Support OCaml 5.2 syntax (ocaml-ppx/ocamlformat#2519, ocaml-ppx/ocamlformat#2544, ocaml-ppx/ocamlformat#2590, ocaml-ppx/ocamlformat#2596, ocaml-ppx/ocamlformat#2621, ocaml-ppx/ocamlformat#2628, @Julow, @EmileTrotignon, @hhugo)
  This includes local open in types, raw identifiers, and the new
  representation for functions.
  This might change the formatting of some functions due to the formatting code
  being completely rewritten.

- Support OCaml 5.3 syntax (ocaml-ppx/ocamlformat#2609, ocaml-ppx/ocamlformat#2610, ocaml-ppx/ocamlformat#2611, ocaml-ppx/ocamlformat#2622, ocaml-ppx/ocamlformat#2623, ocaml-ppx/ocamlformat#2562, ocaml-ppx/ocamlformat#2624, ocaml-ppx/ocamlformat#2625, ocaml-ppx/ocamlformat#2627, @Julow, @Zeta611)
  This adds support for effect patterns, short functor type arguments and utf8
  identifiers.
  To format code using the new `effect` syntax, add this option to your
  `.ocamlformat`:
  ```
  ocaml-version = 5.3
  ```

- Documentation comments are now formatted by default (ocaml-ppx/ocamlformat#2390, @Julow)
  Use the option `parse-docstrings = false` to restore the previous behavior.

- \* Consistent indentation of polymorphic variant arguments (ocaml-ppx/ocamlformat#2427, @Julow)
  Increases the indentation by one to make the formatting consistent with
  normal variants. For example:
  ```
    ...
    (* before *)
      (`Msg
        (foo bar))
    (* after *)
      (`Msg
         (foo bar))
  ```

- Build on OCaml 5.3 (ocaml-ppx/ocamlformat#2603, @adamchol, @Julow)

### Added

- Improve the emacs plugin (ocaml-ppx/ocamlformat#2577, ocaml-ppx/ocamlformat#2600, @gridbugs, @thibautbenjamin)
  Allow a custom command to be used to run ocamlformat and add compatibility
  with emacs ocaml tree-sitter modes.

- Added option `let-binding-deindent-fun` (ocaml-ppx/ocamlformat#2521, @henrytill)
  to control the indentation of the `fun` in:
  ```
  let f =
   fun foo ->
    bar
  ```

- Added back the flag `--disable-outside-detected-project` (ocaml-ppx/ocamlformat#2439, @gpetiot)
  It was removed in version 0.22.

- Support newer Odoc syntax (ocaml-ppx/ocamlformat#2631, ocaml-ppx/ocamlformat#2632, ocaml-ppx/ocamlformat#2633, @Julow)

### Changed

- \* Consistent formatting of comments (ocaml-ppx/ocamlformat#2371, ocaml-ppx/ocamlformat#2550, @Julow)
  This is mostly an internal change but some comments might be formatted differently.

- \* Improve formatting of type constraints with type variables (ocaml-ppx/ocamlformat#2437, @gpetiot)
  For example:
  ```
  let f : type a b c.
      a -> b -> c =
    ...
  ```

- \* Improve formatting of functor arguments (ocaml-ppx/ocamlformat#2505, @Julow)
  This also reduce the indentation of functor arguments with long signatures.

- Improvements to the Janestreet profile (ocaml-ppx/ocamlformat#2445, ocaml-ppx/ocamlformat#2314, ocaml-ppx/ocamlformat#2460, ocaml-ppx/ocamlformat#2593, ocaml-ppx/ocamlformat#2612, @Julow, @tdelvecchio-jsc)

- \* Undo let-bindings and methods normalizations (ocaml-ppx/ocamlformat#2523, ocaml-ppx/ocamlformat#2529, @gpetiot)
  This remove the rewriting of some forms of let-bindings and methods:
  + `let f x = (x : int)` is no longer rewritten into `let f x : int = x`
  + `let f (type a) (type b) ...` is no longer rewritten into `let f (type a b) ...`
  + `let f = fun x -> ...` is no longer rewritten into `let f x = ...`

- \* The `break-colon` option is now taken into account for method type constraints (ocaml-ppx/ocamlformat#2529, @gpetiot)

- \* Force a break around comments following an infix operator (fix non-stabilizing comments) (ocaml-ppx/ocamlformat#2478, @gpetiot)
  This adds a line break:
  ```
    a
    ||
    (* this comment is now on its own line *)
    b
  ```

### Fixed

- Fix placement of comments in some cases (ocaml-ppx/ocamlformat#2471, ocaml-ppx/ocamlformat#2503, ocaml-ppx/ocamlformat#2506, ocaml-ppx/ocamlformat#2540, ocaml-ppx/ocamlformat#2541, ocaml-ppx/ocamlformat#2592, ocaml-ppx/ocamlformat#2617, @gpetiot, @Julow)
  Some comments were being moved or causing OCamlformat to crash.
  OCamlformat refuses to format if a comment would be missing in its output, to avoid loosing code.

- Fix attributes being dropped or moved (ocaml-ppx/ocamlformat#2247, ocaml-ppx/ocamlformat#2459, ocaml-ppx/ocamlformat#2551, ocaml-ppx/ocamlformat#2564, ocaml-ppx/ocamlformat#2602, @EmileTrotignon, @tdelvecchio-jsc, @Julow)
  OCamlformat refuses to format if the formatted code has a different meaning than the original code, for example, if an attribute is removed.
  We also try to avoid moving attributes even if that doesn't change the original code, for example we no longer format `open[@attr] M` as `open M [@@attr]`.

- Remove trailing space inside a wrapping empty signature (ocaml-ppx/ocamlformat#2443, @Julow)
- Fix extension-point spacing in structures (ocaml-ppx/ocamlformat#2450, @Julow)
- \* Consistent break after string constant argument (ocaml-ppx/ocamlformat#2453, @Julow)
- \* Fix cinaps comment formatting to not change multiline string contents (ocaml-ppx/ocamlformat#2463, @tdelvecchio-jsc)
- \* Fix the indentation of tuples in attributes and extensions (ocaml-ppx/ocamlformat#2488, @Julow)
- \* Fix weird indentation and line breaks after comments (ocaml-ppx/ocamlformat#2507, ocaml-ppx/ocamlformat#2589, ocaml-ppx/ocamlformat#2606, @Julow)
- \* Fix unwanted alignment in if-then-else (ocaml-ppx/ocamlformat#2511, @Julow)
- Fix missing parentheses around constraint expressions with attributes (ocaml-ppx/ocamlformat#2513, @alanechang)
- Fix formatting of type vars in GADT constructors (ocaml-ppx/ocamlformat#2518, @Julow)
- Fix `[@ocamlformat "disable"]` in some cases (ocaml-ppx/ocamlformat#2242, ocaml-ppx/ocamlformat#2525, @EmileTrotignon)
  This caused a bug inside `class type` constructs and when attached to a `let ... in`
- Display `a##b` instead of `a ## b` and similarly for operators that start with # (ocaml-ppx/ocamlformat#2580, @v-gb)
- \* Fix arrow type indentation with `break-separators=before` (ocaml-ppx/ocamlformat#2598, @Julow)
- Fix missing parentheses around a let in class expressions (ocaml-ppx/ocamlformat#2599, @Julow)
- Fix formatting of paragraphs in lists in documentation (ocaml-ppx/ocamlformat#2607, @Julow)
- Avoid unwanted space in references and links text in documentation (ocaml-ppx/ocamlformat#2608, @Julow)
- \* Improve the indentation of attributes in patterns (ocaml-ppx/ocamlformat#2613, @Julow)
- \* Avoid large indentation in patterns after `let%ext` (ocaml-ppx/ocamlformat#2615, @Julow)
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Bug: Unable to process a file in xen-api
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