OCaml Changelog

Changed

• Compatible with OCaml 5.2.0 (#2510, @gpetiot, @Julow)

Changed

• Compatible with OCaml 5.1.0 (#2412, @Julow) The syntax of let-bindings changed sligthly in this version.
• Improved ocp-indent compatibility (#2428, @Julow)
• * Removed extra break in constructor declaration with comment (#2429, @Julow)
• * De-indent the object keyword in class types (#2425, @Julow)
• * Consistent formatting of arrows in class types (#2422, @Julow)

Fixed

• Fix dropped attributes on a begin-end in a match case (#2421, @Julow)
• Fix dropped attributes on begin-end in an if-then-else branch (#2436, @gpetiot)
• Fix non-stabilizing comments before a functor type argument (#2420, @Julow)
• Fix crash caused by module types with nested with module (#2419, @Julow)
• Fix ';;' formatting between doc-comments and toplevel directives (#2432, @gpetiot)

Items marked with an asterisk (*) are changes that are likely to format existing code differently from the previous release when using the default profile.

New features

• Handle short syntax for generative functor types (#2348, @gpetiot)
• Improved error reporting for unstable or dropped comments (#2292, @gpetiot)

Removed

• Remove --numeric feature (#2333, #2357, @gpetiot)

Bug fixes

• Fix crash caused by let f (type a) :> a M.u = .. (#2399, @Julow)
• Fix crash caused by module T = (val (x : (module S))) (#2370, @Julow)
• Fix invalid formatting of then begin end (#2369, @Julow)
• Protect match after fun _ : _ -> (#2352, @Julow)
• Fix invalid formatting of (::) (#2347, @Julow)
• Fix indentation of module-expr extensions (#2323, @gpetiot)
• * Remove double parentheses around tuples in a match (#2308, @Julow)
• * Remove extra parentheses around module packs (#2305, @Julow, @gpetiot)
• Fix indentation of trailing double-semicolons (#2295, @gpetiot)
• Fix formatting of comments in "disable" chunks (#2279, @gpetiot)
• Fix non-stabilizing comments attached to private/virtual/mutable keywords (#2272, #2307, @gpetiot, @Julow)

Changes

• Improve formatting of doc-comments (#2338, #2349, #2376, #2377, #2379, #2378, @Julow) Remove unnecessary escaping and preserve empty lines.
• * Indent as-patterns that have parentheses (#2359, @Julow)
• Don't print warnings related to odoc code-blocks when '--quiet' is set (#2336, #2373, @gpetiot, @Julow)
• * Improve formatting of module arguments (#2322, @Julow)
• * Don't indent attributes after a let/val/external (#2317, @Julow)
• Consistent indentation of @@ let+ x = ... (#2315, #2396, @Julow) It was formatted differently than @@ let x = ....
• * Improve formatting of class expressions and signatures (#2301, #2328, #2387, @gpetiot, @Julow)
• * Consistent indentation of fun (type a) -> following fun x -> (#2294, @Julow)
• * Restore short-form formatting of record field aliases (#2282, #2388, @gpetiot, @Julow)
• * Restore short-form for first-class modules: ((module M) : (module S)) is formatted as (module M : S)) (#2280, #2300, @gpetiot, @Julow)
• * Improve indentation of ~label:(fun ... (#2271, #2291, #2293, #2298, #2398, @Julow) The fun keyword is docked where possible and the arguments are indented to avoid confusion with the body.
• JaneStreet profile: treat comments as doc-comments (#2261, #2344, #2354, #2365, #2392, @gpetiot, @Julow)
• Tweaks the JaneStreet profile to be more consistent with ocp-indent (#2214, #2281, #2284, #2289, #2299, #2302, #2309, #2310, #2311, #2313, #2316, #2362, #2363, @gpetiot, @Julow)

Library

• The declaration of options is a regular module instead of a functor. (#2193, @EmileTrotignon)

Bug fixes

• Fix indentation when ocamlformat is disabled on an expression (#2129, @gpetiot)
• Reset max-indent when the max-indent option is not set (#2131, @hhugo, @gpetiot)
• Add missing parentheses around immediate objects having attributes attached in 4.14 (#2144, @gpetiot)
• Fix dropped comment attached to the identifier of an open-expression (#2155, @gpetiot)
• Correctly format chunks of file in presence of enable/disable floating attributes (#2156, @gpetiot)
• Remove abusive normalization in docstrings references (#2159, #2162, @EmileTrotignon)
• Fix parentheses around symbols in if-then-else branches (#2169, @gpetiot)
• Preserve position of comments around variant identifiers (#2179, @gpetiot)
• Fix parentheses around symbol identifiers (#2185, @gpetiot)
• Fix alignment inconsistency between let-binding and let-open (#2187, @gpetiot)
• Fix reporting of operational settings origin in presence of profiles (#2188, @EmileTrotignon)
• Fix alignment inconsistency of if-then-else in apply (#2203, @gpetiot)
• Fix automated Windows build (#2205, @nojb)
• Fix spacing between recursive module bindings and recursive module declarations (#2217, @gpetiot)
• ocamlformat-rpc: use binary mode for stdin/stdout (#2218, @rgrinberg)
• Fix interpretation of glob pattern in .ocamlformat-ignore under Windows (#2206, @nojb)
• Remove conf mutability, and correctly display the conventional profile when using print-config (#2233, @EmileTrotignon)
• Preserve position of comments around type alias (#2239, @EmileTrotignon)
• Preserve position of comments around constructor record (#2237, @EmileTrotignon)
• Preserve position of comments around external declaration strings (#2238, @EmileTrotignon, @gpetiot)
• Preserve position of comments around module pack expressions (#2234, @EmileTrotignon, @gpetiot)
• Correctly parenthesize array literals with attributes in argument positions (#2250, @ccasin)
• Janestreet: Fix indentation of functions passed as labelled argument (#2259, @Julow)

Changes

• Indent 2 columns after initializer keyword (#2145, @gpetiot)
• Preserve syntax of generative modules ((struct end) vs ()) (#2135, #2146, @trefis, @gpetiot)
• Preserve syntax of module unpack with type constraint (((module X) : (module Y)) vs (module X : Y)) (#2136, @trefis, @gpetiot)
• Normalize location format for warning and error messages (#2139, @gpetiot)
• Preserve syntax and improve readability of indexop-access expressions (#2150, @trefis, @gpetiot)
  • Break sequences containing indexop-access assignments
  • Remove unnecessary parentheses around indices
• Mute warnings for odoc code blocks whose syntax is not specified (#2151, @gpetiot)
• Improve formatting of odoc links (#2152, @gpetiot)
• Preserve sugared extension node attached to an if carrying attributes (#2167, @trefis, @gpetiot)
• Remove unnecessary parentheses around partially applied infix operators with attributes (#2198, @gpetiot)
• JaneStreet profile: doesn't align infix ops with open paren (#2204, @gpetiot)
• Re-use the type let_binding from the parser instead of value_binding, improve the spacing of let-bindings regarding of having extension or comments (#2219, @gpetiot)
• The ocamlformat package now only contains the binary, the library is available through the ocamlformat-lib package (#2230, @gpetiot)

New features

• Add a break-colon option to decide whether to break before or after the : symbol in value binding declarations and type constraints. This behavior is no longer ensured by ocp-indent-compat. (#2149, @gpetiot)
• Format .mld files as odoc documentation files (#2008, @gpetiot)
• New value vertical for option if-then-else (#2174, @gpetiot)
• New value vertical for option break-cases (#2176, @gpetiot)
• New value wrap-or-vertical for option break-infix that only wraps high precedence infix ops (#1865, @gpetiot)

New features

• Support odoc-parser.2.0.0 (#2123, @gpetiot)
  • Breaking change: incompatible with earlier versions of odoc-parser
  • New inline math elements {m ...} available in doc-comments
  • New block math elements {math ...} available in doc-comments

Removed

• bench binary is not distributed anymore to avoid name collisions (#2104, @gpetiot)

Bug fixes

• Preserve comments around object open/close flag (#2097, @trefis, @gpetiot)
• Preserve comments around private/mutable/virtual keywords (#2098, @trefis, @gpetiot)
• Closing parentheses of local open now comply with indicate-multiline-delimiters (#2116, @gpetiot)
• emacs: fix byte-compile warnings (#2119, @syohex)

Changes

• Use the API of ocp-indent to parse the .ocp-indent files (#2103, @gpetiot)
• JaneStreet profile: set max-indent = 2 (#2099, @gpetiot)
• JaneStreet profile: align pattern-matching bar | under keyword instead of parenthesis (#2102, @gpetiot)

Removed

• Profiles compact and sparse are now removed (#2075, @gpetiot)
• Options align-cases, align-constructors-decl and align-variants-decl are now removed (#2076, @gpetiot)
• Option disable-outside-detected-project is now removed (#2077, @gpetiot)

Deprecated

• Cancel the deprecations of options that are not set by the preset profiles (#2074, @gpetiot)

Bug fixes

• emacs: Remove temp files in the event of an error (#2003, @gpetiot)
• Fix unstable comment formatting around prefix op (#2046, @gpetiot)

Changes

• Qtest comments are not re-formatted (#2034, @gpetiot)
• ocamlformat-rpc is now distributed through the ocamlformat package (#2035, @Julow)
• Doc-comments code blocks with a language other than 'ocaml' (set in metadata) are not parsed as OCaml (#2037, @gpetiot)
• More comprehensible error message in case of version mismatch (#2042, @gpetiot)
• The global configuration file ($XDG_CONFIG_HOME or $HOME/.config) is only applied when no project is detected, --enable-outside-detected-project is set, and no applicable .ocamlformat file has been found. Global and local configurations are no longer used at the same time. (#2039, @gpetiot)
• Set ocaml-version to a fixed version (4.04.0) by default to avoid reproducibility issues and surprising behaviours (#2064, @kit-ty-kate)
• Split option --numeric=X-Y into --range=X-Y and --numeric (flag). For now --range can only be used with --numeric. (#2073, #2082, @gpetiot)

New features

• New syntax (*= ... *) for verbatim comments (#2028, @gpetiot)
• Preserve the begin-end construction in the AST (#1785, @hhugo, @gpetiot)
• Preserve position of comments located after the semi-colon of the last element of lists/arrays/records (#2032, @gpetiot)
• Option --print-config displays a warning when an .ocamlformat file defines redundant options (already defined by a profile) (#2084, @gpetiot)

Bug fixes

• Add missing parentheses around variant class arguments (#1967, @gpetiot)
• Fix indentation of module binding RHS (#1969, @gpetiot)
• Fix position of := when assignment-operator=end-line (#1985, @gpetiot)
• Fix position of comments attached to constructor decl (#1986, @gpetiot)
• Do not wrap docstrings, wrap-comments should only impact non-documentation comments, wrapping invalid docstrings would cause the whole file to not be formatted (#1988, @gpetiot)
• Do not break between 2 module items when the first one has a comment attached on the same line. Only a comment on the next line should induce a break to make it clear to which element it is attached to (#1989, @gpetiot)
• Preserve position of comments attached to the last node of a subtree (#1667, @gpetiot)
• Do not override the values of the following non-formatting options when a profile is set: comment-check, disable, max-iters, ocaml-version, and quiet (#1995, @gpetiot).
• Remove incorrect parentheses around polymorphic type constraint (#2002, @gpetiot)
• Handle cases where an attribute is added to a bind expression, e.g. (x >>= (fun () -> ())) [@a] (#2013, @emillon)
• Fix indentation of constraints of a package type pattern (#2025, @gpetiot)

Changes

• More expressions are considered "simple" (not inducing a break e.g. as an argument of an application):
  • Variants with no argument (#1968, @gpetiot)
  • Empty or singleton arrays/lists (#1943, @gpetiot)
• Print odoc code block delimiters on their own line (#1980, @gpetiot)
• Make formatting of cons-list patterns consistent with cons-list expressions, (::) operators are aligned when possible, comments position also improved (#1983, @gpetiot)
• Apply 'sequence-style' to add a space before ';;' between toplevel items, consistently with the formatting of ';' in sequences (#2004, @gpetiot)

New features

• Format toplevel phrases and their output (#1941, @Julow, @gpetiot). This feature is enabled with the flag --parse-toplevel-phrases. Toplevel phrases are supported when they are located in doc-comments blocks and cinaps comments. Whole input files can also be formatted as toplevel phrases with the flag --repl-file.

RPC

• ocamlformat-rpc-lib is now functorized over the IO (#1975, @gpetiot). Now handles Csexp.t types instead of Sexplib0.Sexp.t.
• RPC v2 (#1935, @panglesd): Define a 'Format' command parameterized with optionnal arguments to set or override the config and path, to format in the style of a file.
• Prevent RPC to crash on version mismatch with .ocamlformat (#2011, @panglesd, @Julow)

New features

• Update to odoc-parser 1.0.0 (#1843, @Julow). New syntax: code blocks can carry metadata, e.g.: {@ocaml kind=toplevel env=e1[ code ]}

Deprecated

• Profiles compact and sparse are now deprecated and will be removed by version 1.0 (#1803, @gpetiot)
• Options that are not set by the preset profiles are now deprecated and will be removed by version 1.0:
  • align-cases, align-constructors-decl and align-variants-decl (#1793, @gpetiot)
  • disambiguate-non-breaking-match (#1805, @gpetiot)
  • break-before-in (#1888, @gpetiot)
  • break-cases={toplevel,all} (#1890, @gpetiot)
  • break-collection-expressions (#1891, @gpetiot)
  • break-fun-decl=smart (#1892, @gpetiot)
  • break-fun-sig=smart (#1893, @gpetiot)
  • break-string-literals (#1894, @gpetiot)
  • break-struct (#1895, @gpetiot)
  • extension-indent (#1896, @gpetiot)
  • function-indent (#1897, @gpetiot)
  • function-indent-nested (#1898, @gpetiot)
  • if-then-else={fit-or-vertical,k-r} (#1899, @gpetiot)
  • indicate-multiline-delimiters=closing-on-separate-line (#1900, @gpetiot)
  • indent-after-in (#1901, @gpetiot)
  • let-binding-indent (#1902, @gpetiot)
  • let-binding-spacing=sparse (#1903, @gpetiot)
  • match-indent (#1904, @gpetiot)
  • match-indent-nested (#1905, @gpetiot)
  • module-item-spacing=preserve (#1906, @gpetiot)
  • nested-match (#1907, @gpetiot)
  • parens-tuple-patterns (#1908, @gpetiot)
  • sequence-style=before (#1909, @gpetiot)
  • stritem-extension-indent (#1910, @gpetiot)
  • type-decl-indent (#1911, @gpetiot)

Bug fixes

• Fix normalization of sequences of expressions (#1731, @gpetiot)
• Type constrained patterns are now always parenthesized, parentheses were missing in a class context (#1734, @gpetiot)
• Support sugared form of coercions in let bindings (#1739, @gpetiot)
• Add missing parentheses around constructor used as indexing op (#1740, @gpetiot)
• Honour .ocamlformat-ignore on Windows (#1752, @nojb)
• Avoid normalizing newlines inside quoted strings {|...|} (#1754, @nojb, @hhugo)
• Fix quadratic behavior when certain constructs are nested. This corresponds to the cases where a partial layout is triggered to determine if a construct fits on a single line for example. (#1750, #1766, @emillon)
• Fix non stabilizing comments after infix operators (*, %, #-ops) (#1776, @gpetiot)
• Fix excessive break and wrong indentation after a short-open when indicate-multiline-delimiters=closing-on-separate-line (#1786, @gpetiot)
• Add parentheses around type alias used as type constraint (#1801, @gpetiot)
• Fix alignment of comments inside a tuple pattern and remove incorrect linebreak. Fix formatting of labelled arguments containing comments. (#1797, @gpetiot)
• Emacs: only hook ocamlformat mode on tuareg/caml modes when ocamlformat is not disabled (#1814, @gpetiot)
• Fix boxing of labelled arguments, avoid having a linebreak after a label when the argument has a comment attached (#1830, #1885, @gpetiot)
• Add missing parentheses around application of prefix op when applied to other operands (#1825, @gpetiot)
• Fix application of a monadic binding when 'break-infix-before-func=false' (#1849, @gpetiot)
• Fix dropped comments attached to a sequence in a sugared extension node (#1853, @gpetiot)
• Fix formatting of exception types, and add missing parentheses (#1873, @gpetiot)
• Fix indentation of with-type constraints (#1883, @gpetiot)
• Preserve sugared syntax of extension points with attributes (#1913, @gpetiot)
• Improve comment attachment when followed but not preceded by a linebreak (#1926, @gpetiot)
• Fix position of comments preceding Pmod_ident (#1939, @gpetiot)
• Make the formatting of attributes and docstrings more consistent (#1929, @gpetiot)
• Fix stabilization of comments inside attributes (#1942, @gpetiot)

Changes

• Set 'module-item-spacing=compact' in the default/conventional profile (#1848, @gpetiot)
• Preserve bracketed lists in the Parsetree (#1694, #1876, #1914, @gpetiot)
• Line directives now cause OCamlFormat to emit an error, they were previously silently ignored (#1845, @gpetiot)
• Apply option 'module-item-spacing' on mutually recursive type declarations for more consistency (#1854, @gpetiot)

New features

• Handle merlin typed holes (#1698, @gpetiot)
• Handle punned labelled arguments with type constraint in function applications. For example, function application of the form foo ~(x:int) instead of the explicit foo ~x:(x:int). (ocaml#10434) (#1756, #1759, @gpetiot). This syntax is only produced when the output syntax is at least OCaml 4.14.
• Allow explicit binders for type variables (ocaml#10437) (#1757, @gpetiot)
• Add a new ocaml-version option to select the version of OCaml syntax of the output (#1759, @gpetiot)
• Allow disambiguated global identifiers (like t/2) so they can be formatted by tools like OCaml-LSP (#1716, @let-def)
• Handle let operator punning uniformly with other punning forms. Normalizes let operator to the punned form where possible, if output syntax version is at least OCaml 4.13.0. (#1834, #1846, @jberdine)
• Remove unnecessary surrounding parentheses for immediate objects. This syntax is only produced when the output syntax is at least OCaml 4.14. (#1934, @gpetiot)

Bug fixes

• Fix formatting of odoc tags: the argument should be on the same line, indent description that wraps (#1634, #1635, @gpetiot)
• Consistently format let bindings and monadic let bindings, do not drop comments before monadic bindings (#1636, @gpetiot)
• Fix dropped comments attached to pattern constrained by polynewtype (#1645, @gpetiot)
• Fix comment attachment on infix operators (#1643, @gpetiot)
• Add missing spaces inside begin-end delimiting an ite branch (#1646, @gpetiot)
• Add missing parens around function at RHS of infix op (#1642, @gpetiot)
• Preserve begin-end keywords delimiting match cases (#1651, @gpetiot)
• Fix alignment of closing paren on separate line for anonymous functions (#1649, @gpetiot)
• Preserve begin-end keywords around infix operators (#1652, @gpetiot)
• Preserve begin%ext syntax for infix opererator expressions (#1653, @gpetiot)
• Consistently format comments attached to let-and bindings located at toplevel (#1663, @gpetiot)
• Remove double parens around a functor in a module application (#1681, @gpetiot)
• Improve breaking of comments to avoid violating the margin (#1676, @jberdine)
• Fix parentheses around successive unary operations (#1696, @gpetiot)
• Add missing break between pattern and attribute (#1711, @gpetiot)
• Add missing parentheses around expression having attributes or comments inside a shorthand let-open clause (#1708, @gpetiot)
• Do not consider leading star '*' when checking the diff of doc comments (#1712, @hhugo)
• Fix formatting of multiline non-wrapping comments (#1723, @gpetiot)
• Fix position of comments following a record field (#1945, @gpetiot)

Changes

• Improve the diff of unstable docstrings displayed in error messages (#1654, @gpetiot)
• Use UTF8 length of strings, not only in wrapped comments (#1673, @jberdine)
• Improve position of ;; tokens (#1688, @gpetiot)
• Depend on odoc-parser instead of odoc (#1683, #1713, @kit-ty-kate, @jonludlam, @julow). The parser from odoc has been split from the main odoc package and put into its own package, odoc-parser.
• Revert infix-form list formatting to pre-0.17.0 (#1717, @gpetiot)

New features

• Implement OCaml 4.13 features (#1680, @gpetiot)
  • Named existentials in pattern-matching (ocaml#9584)
  • Let-punning (ocaml#10013)
  • Module type substitutions (ocaml#10133)
• Emacs integration (disabled for ocamlformat < 0.19.0):
  • Indent a line or a region with ocamlformat when pressing
  • Break the line and reindent the cursor when pressing (#1639, #1685, @gpetiot) (#1687, @bcc32)
• Add 'line-endings=lf|crlf' option to specify the line endings used in the formatted output. (#1703, @nojb)

Internal

• A script tools/build-mingw64.sh is provided to build a native Windows binary of ocamlformat using mingw64 toolchain under Cygwin.

Bug fixes

• Fix extraneous parenthesis after let open with closing-on-separate-line (#1612, @Julow)
• Add missing break between polytype quantification and arrow-type body (#1615, @gpetiot)

Changes

• Use dune instrumentation backend for bisect_ppx (#1550, @tmattio)
• Format objects and classes consistently with structure and signature items (#1569, @bikallem)

New features

• Expose a RPC interface through a new binary ocamlformat-rpc and a new library ocamlformat-rpc-lib (#1586, @gpetiot, @voodoos)

Removed

• Remove the 'let-open' option, deprecated since 0.16.0 (#1563, @gpetiot)
• Remove support for OCaml 4.06 and 4.07, minimal version requirement bumped to OCaml 4.08 (#1549, @gpetiot)
• Remove the 'extension-sugar' option, deprecated since 0.14.0 (#1588, @gpetiot)

Bug fixes

• Fix parsing of invalid file wrt original source handling (#1542, @hhugo)
• Preserve the syntax of infix set/get operators (#1528, @gpetiot). String.get and similar calls used to be automatically rewritten to their corresponding infix form .(), that was incorrect when using the -unsafe compilation flag. Now the concrete syntax of these calls is preserved.
• Add location of invalid docstring in warning messages (#1529, @gpetiot)
• Fix comments on the same line as prev and next elements (#1556, @gpetiot)
• Break or-patterns after comments and preserve their position at the end of line (#1555, @gpetiot)
• Fix linebreak between signature items of the same group (#1560, @gpetiot)
• Fix stack overflow on large string constants (#1562, @gpetiot)
• Fix comment position around list cons operator (#1567, @gpetiot)
• Fix the vertical alignment test to break down comment groups (#1575, @gpetiot)
• Preserve spacing of toplevel comments (#1554, @gpetiot)
• Support more sugared extension points (#1587, @gpetiot)

Changes

• Add buffer filename in the logs when applying ocamlformat (#1557, @dannywillems)
• Improve comment position in pattern collection (#1576, @gpetiot)
• Consistent positioning of lambda return type annotations when no-break-infix-before-func and pre/post extensions (#1581, @gpetiot)

New features

• Support injectivity type annotations (OCaml 4.12 feature) (#1523, @gpetiot)

Removed

• Remove the 'escape-chars' option, deprecated since 0.14.0 (#1462, @gpetiot)
• Remove the 'escape-strings' option, deprecated since 0.14.0 (#1463, @gpetiot)
• Remove the 'doc-comments-val' option, deprecated since 0.14.2 (#1461, @gpetiot)
• Removed options are now listed in the commandline manual (new REMOVED OPTIONS section) (#1469, @Julow)

Changes

• Set 'indicate-multiline-delimiters=no' on default profile (#1452, @gpetiot)
• Option 'let-open' is now deprecated, concrete syntax will always be preserved starting from OCamlFormat v0.17.0, corresponding to the current 'let-open=preserve' behavior. (#1467, @gpetiot)
• Warnings printed by ocamlformat itself now use the 4.12 style with symbolic names (#1511, #1518, @emillon)
• Remove extension from executable name in error messages. On Windows, this means that messages now start with "ocamlformat: ..." instead of "ocamlformat.exe: ..." (#1531, @emillon)
• Using tokens instead of string manipulation when inspecting the original source (#1526, #1533, #1541 @hhugo) (#1532, @gpetiot)

Bug fixes

• Allow a break after if%ext with if-then-else=keyword-first (#1419, #1543, @gpetiot)
• Fix parentheses around infix applications having attributes (#1464, @gpetiot)
• Fix parentheses around the index arg of a non-sugared index operation (#1465, @gpetiot)
• Preserve comment position around match and try keywords (#1458, @gpetiot)
• Add missing break in module statement (#1431, @gpetiot)
• Indent attributes attached to included modules better (#1468, @gpetiot)
• Clean up ocamlformat.el for submission to MELPA (#1476, #1495, @bcc32)
  • Added missing package metadata to ocamlformat.el (#1474, @bcc32)
  • Fix ocamlformat.el buffer replacement for MacOS Emacs (#1481, @juxd)
• Add missing parentheses around a pattern matching that is the left-hand part of a sequence when an attribute is attached (#1483, @gpetiot)
• Add missing parentheses around infix operator used to build a function (#1486, @gpetiot)
• Fix comments around desugared expression (#1487, @gpetiot)
• Fix invalid fragment delimiters of format-invalid-files recovery mode (#1485, @hhugo)
• Fix misalignment of cases in docked function match (#1498, @gpetiot)
• Preserve short-form extensions for structure item extensions (#1502, @gpetiot). For example open%ext M will not get rewritten to [%%ext open M].
• Do not change the spaces within the code spans in docstrings (#1499, @gpetiot)
• Comments of type constrained label in record pattern have to be relocated in 4.12 (#1517, @gpetiot)
• Preserve functor syntax for OCaml 4.12 (#1514, @gpetiot)
• Fix inconsistencies of the closing parentheses with indicate-multiline-delimiters (#1377, #1540, @gpetiot)
• Fix position of comments around list constructor (::) (#1524, @gpetiot)
• Fix comments position in extensions (#1525, @gpetiot)
• Fix formatting of field override with constraint (#1544, @gpetiot)

Internal

• Use ppxlib instead of ocaml-migrate-parsetree 1.x. (#1482, @emillon)
  • No functional changes are expected.
  • Cherry picked commits: 219dc1e3a4614041e1bc5428d003c0af4e, 9e453b0ef87124e33827ee2423289deef8, 7ad1e575ffa4ce3022c71daba39954d3b9, eb49db6772a9adabe611982000465d0ad7, dc79052a085950cd88fdef0843f665a029, c06c544e21bd65b726cde8fee0f78a6248, ce94d2fa50ff276b5782070375a0b30ba1

Changes

• Do not break inline elements such as {i blah} in docstrings (#1346, @jberdine)
• Distinguish hash-getter from hash-comparison infix operators. Operators of the form #**# or #**. where ** can be 0 or more operator chars are considered getter operators and are not surrounded by spaces, as opposed to regular infix operators (#1376, @gpetiot)
• Type constraint on return type of functions is now always printed before the function body (#1381, #1397, @gpetiot)

Bug fixes

• Restore previous functionality for pre-post extension points (#1342, @jberdine)
• Fix extra break before function body of a fun (#1343, @jberdine)
• Indent further args of anonymous functions (#1440, @gpetiot)
• Do not clear the emacs *compilation* buffer on successful reformat (#1350, @jberdine)
• Fix disabling with attributes on OCaml < 4.08 (#1322, @emillon)
• Preserve unwrapped comments by not adding artificial breaks when wrap-comments=false and ocp-indent-compat=true are set to avoid interfering with ocp-indent indentation. (#1352, @gpetiot)
• Break long literal strings at the margin (#1367, @gpetiot)
• Break after a multiline argument in an argument list (#1360, @gpetiot)
• Remove unnecessary parens around object (#1379, @gpetiot)
• Fix placement of comments on constants (#1383, @gpetiot)
• Do not escape arguments of some Odoc tags (#1391, 1408, @gpetiot, @Julow). The characters []{} must not be escaped in the arguments of @raise, @author, @version and others.
• Fix missing open line between multi-line let-binding with poly-typexpr (#1372, @jberdine)
• Remove trailing space after expression when followed by an attribute and break before attributes attached to multi-line phrases (#1382, @gpetiot)
• Do not add a space to minimal comments (* *), (** *) and (*$ *) (#1407, @gpetiot)
• Fix attributes position in labelled arguments type (#1434, @gpetiot)
• Add missing parens around type annotation in anonymous function (#1433, @gpetiot)
• Fix alignment of 'then' keyword in parenthesised expression (#1421, @gpetiot)

New features

• Support quoted extensions (added in ocaml 4.11) (#1405, @gpetiot)
• Recognise eliom file extensions (#1430, @jrochel)

Changes

• No functional changes from 0.14.2. The goal of this release is to be compatible with base and stdio v0.14.0.
• Backport the following PRs:
  • Update opam metadata (#1386)
  • Add compatibility with base.v0.14.0 (#1396)
  • Allow stdio.v0.14 (#1399)

Changes

• Merge doc-comments-val option with doc-comments. The placement of documentation comments on val and external items is now controled by doc-comments.
  • doc-comments=after becomes doc-comments=after-when-possible to take into account the technical limitations of ocamlformat;
  • doc-comments=before is unchanged;
  • doc-comments-val is now replaced with doc-comments. To reproduce the former behaviors
    • doc-comments=before + doc-comments-val=before: now use doc-comments=before;
    • doc-comments=before + doc-comments-val=after: now use doc-comments=before-except-val;
    • doc-comments=after + doc-comments-val=before: this behavior did not make much sense and is not available anymore;
    • doc-comments=after + doc-comments-val=after: now use doc-comments=after-when-possible. (#1358, @jberdine, @Julow, @gpetiot). This reverts changes introduced in 0.14.1 (#1335) and 0.14.0 (#1012).

Changes

• The default for doc-comments is changed to after (#1335, @Julow). This reverts a change introduced in 0.14.0 (#1012).
• Revert deprecation of the doc-comments option (#1331, @Julow). This reverts a change introduced in 0.14.0 (#1293).

New features

• Add an option --format-invalid-files to print unparsable parts of the input as verbatim text. This feature is still experimental. (#1026, @gpetiot)
• Support multi-indices extended indexing operators (#1279, #1277, @Julow, @gpetiot). This feature has been added in OCaml 4.10.0
• Handle OCaml 4.10.0 AST (#1276, @gpetiot)
• Preserve functor syntax for consistency (#1312, @gpetiot). Previously both functor syntax: module M = functor (K : S) -> struct end and module M (K : S) = struct end would be formatted as the latter, the original syntax is now preserved.

Changes

• Add the option doc-comments-val=before|after (#1012, @Julow). This option set the placement of documentation comment on val and external only. It is set to after by default.
• The default for doc-comments is changed from after to before (#1012, #1325, @Julow). This affects both conventional (default) and ocamlformat profiles.
• Some options are now deprecated:
  • doc-comments (#1293, #1012). This option depends on a flawed heuristic. It is replaced by doc-comments-val for val and external declarations. There is no equivalent to this option in the general case.
  • escape-chars, escape-strings and extension-sugar (#1293). These options are rarely used and their default behavior is considered to be the right behavior.
• Add space between row_field attributes and the label or arguments, to be consistent with the non-polymorphic case. (#1299, @CraigFe)

Bug fixes

• Fix missing parentheses around let open (#1229, @Julow). eg. M.f (M.(x) [@attr]) would be formatted to M.f M.(x) [@attr], which would crash OCamlformat
• Remove unecessary parentheses with attributes in some structure items:
  • extensions and eval items (#1230, @Julow). eg. the expression [%ext (() [@attr])] or the structure item (() [@attr]) ;;
  • let _ = ... constructs (#1244, @emillon)
• Fix some bugs related to comments:
  • after a function on the rhs of an infix (#1231, @Julow). eg. the comment in (x >>= fun y -> y (* A *)) would be dropped
  • in module unpack (#1309, @Julow). eg. in the module expression module M = (val x : S (* A *))
• Fix formatting of empty signature payload [%a:] (#1236, @emillon)
• Fix parenthesizing when accessing field of construct application (#1247, @gpetiot)
• Fix formatting of attributes on object overrides {< >} (#1238, @emillon)
• Fix attributes on coercion (#1239, @emillon)
• Fix formatting of attributes on packed modules (#1243, @emillon)
• Fix parens around binop operations with attributes (#1252, #1306, @gpetiot, @CraigFe)
• Remove unecessary parentheses in the argument of indexing operators (#1280, @Julow)
• Retain attributes on various AST nodes:
  • field set expressions, e.g. (a.x <- b) [@a] (#1284, @CraigFe)
  • instance variable set expressions, e.g. (a <- b) [@a] (#1288, @CraigFe)
  • indexing operators, e.g. (a.(b)) [@a] (#1300, @CraigFe)
  • sequences, e.g. (a; b) [@a] (#1291, @CraigFe)
• Avoid unnecessary spacing after object types inside records and polymorphic variants, e.g. {foo : < .. > [@a]} and { foo : < .. > } (#1296, @CraigFe)
• Fix missing parentheses around tuples with attributes. (#1301, @CraigFe). Previously, f ((0, 0) [@a]) would be formatted to f (0, 0) [@a], crashing OCamlformat.
• Avoid emitting >] when an object type is contained in an extension point or attribute payload (#1298, @CraigFe)
• Fix crash on the expression (0).*(0) (#1304, @Julow). It was formatting to 0.*(0) which parses as an other expression.
• Preserve empty doc-comments syntax. (#1311, @gpetiot). Previously (**) would be formatted to (***).
• Do not crash when a comment contains just a newline (#1290, @emillon)
• Handle lazy patterns as arguments to class (#1289, @emillon)
• Preserve cinaps comments containing unparsable code (#1303, @Julow). Previously, OCamlformat would fallback to the "wrapping" logic, making the comment unreadable and crashing in some cases.
• Fix normalization of attributes, fixing the docstrings in attributes (#1314, @gpetiot)
• Add missing parentheses around OR-patterns with attributes (#1317, @gpetiot)
• Fix spacing inside parens for symbols when the spacing was handled by the englobing exp (#1316, @gpetiot)
• Fix invalid (unparsable) docstrings (#1315, @gpetiot). When parsing a comment raises an error in odoc, it is printed as-is.
• Fix parenthesizing of optional arguments rebound to non-variables, e.g. let f ?a:(A) = () rather than the unparsable let f ?a:A = () (#1305, @CraigFe)

New features

• Add an option --margin-check to emit a warning if the formatted output exceeds the margin (#1110, @gpetiot)
• Preserve comment indentation when wrap-comments is unset (#1138, #1159, @Julow)
• Improve error messages (#1147, @Julow)
• Display standard output in the emacs plugin even when ocamlformat does not fail (#1189, @gpetiot)

Removed

• Remove ocamlformat_reason (#254, #1185, @emillon). This tool has never been released to opam, has no known users, and overlaps with what refmt can do.
• Remove ocamlformat-diff (#1205, @gpetiot). This tool has never been released to opam, has no known users, and overlaps with what merge-fmt can do.

Packaging

• Work with base v0.13.0 (#1163, @Julow)

Bug fixes

• Fix placement of comments just before a '|' (#1203, @Julow)
• Fix build version detection when building in the absence of a git root (#1198, @avsm)
• Fix wrapping of or-patterns in presence of comments with break-cases=fit (#1167, @Julow). This also fixes an unstable comment bug in or-patterns
• Fix an unstable comment bug in variant declarations (#1108, @Julow)
• Fix: break multiline comments (#1122, @gpetiot)
• Fix: types on named arguments were wrapped incorrectly when preceding comments (#1124, @gpetiot)
• Fix the indentation produced by max-indent (#1118, @gpetiot)
• Fix break after Psig_include depending on presence of docstring (#1125, @gpetiot)
• Remove some calls to if_newline and break_unless_newline and fix break before closing brackets (#1168, @gpetiot)
• Fix unstable cmt in or-pattern (#1173, @gpetiot)
• Fix location of comment attached to the underscore of an open record (#1208, @gpetiot)
• Fix parentheses around optional module parameter (#1212, @cbarcenas)
• Fix grouping of horizontally aligned comments (#1209, @gpetiot)
• Fix dropped comments around module pack expressions (#1214, @Julow)
• Fix regression of comment position in list patterns (#1141, @jberdine)
• Fix: adjust definition of Location.is_single_line to reflect margin (#1102, @jberdine)

Documentation

• Fix documentation of option version-check (#1135, @Wilfred)
• Fix hint when using break-separators=after-and-docked (#1130, @gretay-js)

Changes

• Set "conventional" as the default profile (#1060, @gpetiot). This new profile is made to better match the most used style and is encouraged. To continue using the previous default, use profile = ocamlformat in your .ocamlformat.
• CLI: Allow both values of boolean options (#1062, @Julow). Now, both --opt and --no-opt` are available on the CLI for any boolean option "opt". Previously, only one of them were available depending on the default value.
• Auto mode for break-string-literals (#1057, @gpetiot). wrap, newlines and newlines-and-wrap values of break-string-literals are removed. auto replaces them, it is equivalent to newlines-and-wrap.
• Dock collection brackets (#1014, @gpetiot). after-and-docked value of break-separators is removed and is replaced by a new dock-collection-brackets option.
• Preserve begin and end keywords in if-then-else (#978, @Julow). Previously, begin/end keywords around if-then-else branches were turned into parentheses.

New features

• Give a hint when warning 50 is raised (#1111, @gpetiot)
• Add a message when a config value is removed (#1089, @emillon). Explain what replaces removed options and avoid printing a parsing error.
• Implement sequence-blank-line=preserve-one for let bindings (#1077, @Julow). Preserve a blank line after let .. in when sequence-blank-line set to preserve-one. Previously, only blank lines after ; could be preserved.
• Parse toplevel directives (#1020, @Julow). Allow #directives in .ml files. Previously, files containing a directive needed to be parsed as "use file". The "use file" mode is removed and --use-file is now the same as --impl.
• Don't require --name, require kind, forbid --inplace, allow --check, make --enable-outside-detected-project implicit when reading from stdin (#1018, @gpetiot)
• Parse code in docstrings (#941, @gpetiot). Format OCaml code in cinaps-style comments (*$ code *) and code blocks in documentation comments (** {[ code ]} *).
• Parse documentation comments with Odoc (#721, @Julow). Formatting of documentation comments is more robust and support newer Odoc syntaxes. Internally, Odoc replaces Octavius as the documentation parser.

Bug fixes

• Fix unstabilizing comments on assignments (#1093, @gpetiot)
• Fix the default value documentation for max-indent (#1105, @gpetiot)
• Fix closing parenthesis exceeding the margin in function application (#1098, @Julow)
• Missing break before attributes of Pmty_with (#1103, @jberdine)
• Fix closing quote exceeding the margin (#1096, @Julow)
• Fix break before the closing bracket of collections (exceeding the margin) (#1073, @gpetiot)
• Fix precedence of Dot wrt Hash (#1058, @gpetiot)
• Fix break in variant type definition to not exceed the margin (#1064, @gpetiot)
• Fix newlines and indentation in toplevel extension points (#1054, @gpetiot)
• Fix placement of doc comments around extensions (#1052, @Julow)
• Inline extensions that do not break (#1050, @gpetiot)
• Add missing cut before attributes in type declarations (#1051, @gpetiot)
• Fix alignment of cases (#1046, @gpetiot)
• Fix blank line after comments at the end of lists (#1045, @gpetiot)
• Fix indexing operators precedence (#1039, @Julow)
• Fix dropped comment after infix op (#1030, @gpetiot)
• No newline if the input is empty (#1031, @gpetiot)
• Fix unstable comments around attributes (#1029, @gpetiot)
• Fix extra blank line in sequence (#1021, @Julow)
• Check functor arguments when computing placement of doc comments (#1013, @Julow)
• Fix indentation of labelled args (#1006, @gpetiot)
• Fix linebreak between or-cases with comments when break-cases=all (#1002, @gpetiot)
• Fix unstable unattached doc comment in records (#998, @Julow)
• Fix string literal changed (#995, @Julow)
• Fix type variable (#996, @Julow)
• Fix crash on extension sequence (#992, @gpetiot)
• Fix position of expressions regarding of comments in infix-op expressions (#986, @gpetiot)
• Escape special characters in external declaration (#988, @Julow)
• Fix parens around constrained expr with attrs (#987, @gpetiot)
• Fix the margin, and correctly breaks comments (#957, @gpetiot)
• Fix formatting of custom indexing operators (#975, @gpetiot)
• Fix position of comments of labelled arrow types (#976, @gpetiot)
• No box around inline odoc styles (#971, @gpetiot)
• Fix boxing of collection expressions/patterns (#960, @gpetiot)
• Fix crash on record expr with pack fields (#963, @Julow)
• Fix letop in subexpr (#956, @hhugo)

Internal

• Take file kind from --name when formatting stdin (#1119, @Julow)
• Make Fmt.t abstract (#1109, @Julow)
• Future-proof Fmt API in case Fmt.t goes abstract (#1106, @emillon)
• Future-proof Fmt API in case Fmt.t goes abstract (#1106, @emillon)
• Optional names for formatting boxes in debug output (#1083, @gpetiot)
• Check ocamlformat error codes in the testsuite (#1084, @emillon)
• Clean Translation_unit (#1078, @gpetiot)
• Use dune file generation in test/passing/dune (#1082, @emillon)
• CI: factorize tests and check reason build (#1079, @gpetiot)
• Use short form for action in src/dune (#1076, @emillon)
• Cleanup sequence_blank_line (#1075, @Julow)
• CI: use a script travis-ci.sh to simplify .travis.yml (#1063, @gpetiot)
• Remove utility functions from Fmt_ast (#1059, @gpetiot)
• CI: use opam-2.0.5 in Travis (#1044, @XVilka)
• CI: check the build with OCaml 4.07.1 and 4.08.0 (#1036, @Julow)
• Use the same sets of options for both branches by default in test_branch.sh (#1033, @gpetiot)
• Fix test_branch.sh and CI checking of CHANGES.md (#1032, #1034, @Julow)
• Fix flag of git-worktree in test_branch.sh and bisect.sh (#1027, @gpetiot)
• Remove the bisect_ppx dependency and clean the Makefile (#1005, @Julow)
• Use a CHANGES.md log file again (#1023, @gpetiot)
• Support OCaml 4.09.0 (add the odoc.1.4.2 dependency) (#1024, @gpetiot)
• Update labels of issue templates (#1017, @gpetiot)
• Update labels in CONTRIBUTING.md (#1007, @gpetiot)
• Allow to ignore invalid options (#984, @hhugo). The --ignore-invalid-option flag is added to ignore invalid options in .ocamlformat files.
• Improve the documentation of --doc-comments (#982, @Julow)
• Remove symbolic links and change naming convention of tests (#980, @gpetiot)
• Change the type of fmt_code (#974, @gpetiot)
• Simplify Makefile (#973, @hhugo)
• Dune should not be flagged as a build dep anymore (#954, @gpetiot)

• Improve: generalize API of Config_option (#952, @gpetiot)
• Improve: new 'before' value for option 'sequence-style' (#947, @gpetiot)
• Project: create issue templates (#950, @gpetiot)
• Improve: tidying up Conf.ml (#951, @gpetiot)
• Improve: parse code in comments (#934, @gpetiot)
• Fix comments' placement (do not look at loc_stack) (#923, @gpetiot)
• Doc: setting flags in .ocamlformat (#944, @gpetiot)
• Doc: enable-outside-detected-project necessary for global conf file (#948, @gpetiot)
• Fix hashbang handling (#946, @hhugo)
• Improve: support Shell-style regular expressions in .ocamlformat-ignore and .ocamlformat-enable files (#937, @gpetiot)
• Improve: force break after an infix op only if followed by another one (#935, @gpetiot)
• Fix break-separators=after-and-docked for lists and arrays (#931, @gpetiot)
• Improve: deprecate option break-string-literals and change its default value (#932, @gpetiot)
• Improve: break with labeled arrow type (#933, @gpetiot)
• Improve: disambiguate non-breaking matching structures (#857, @gpetiot)
• Improve: warning 50 handled like an internal error (#930, @gpetiot)
• Fix break-separators=after-and-docked for record patterns (#929, @gpetiot)
• Fix closing parenthesis indentation when on separate line (#928, @gpetiot)
• Improve: split the Conf.ml file (#920, @gpetiot)
• Fix position of comments after anonymous functions (#919, @gpetiot)
• Fix: comments around disabled block (#918, @hhugo)
• Fix monadic bindings (new 4.08 syntax) (#911, @gpetiot)
• Fix attribute when break-infix-before-func=false (#916, @gpetiot)
• Improve: update ocamlformat_reason opam file to 2.0 format (#913, @avsm)
• Fix attributes of modules (#910, @gpetiot)
• Fix docstrings of exceptions (#909, @gpetiot)
• Fix attribute location in Normalization (#908, @gpetiot)
• Improve: add the 'ocamlformat-file-kind' argument to the emacs hook (#905, @gpetiot)
• Improve: dunify testsuite (#881, @trRefis)
• Improve: add trailing semicolon inside record when break-separators=after-and-docked (#899, @gpetiot)
• Fix compilation with 4.06 and 4.07 (#898, @gpetiot)
• Improve: add a new way to indicate multiline delimiters (#876, @trefis)
• Fix inconsistency of break-separators=after-and-docked for record expressions (#856, @gpetiot)

• Improve: align cases horizontally (#883, @gpetiot)
• Improve: option exp-grouping (#828, @gpetiot)
• Improve: synchronize Format with upstream stdlib (#885, @gpetiot)
• Improve: break-string-literals=newlines-and-wrap (#896, @gpetiot)
• Improve: specify break hint in fits_breaks (#894, @gpetiot)
• Improve: option break-before-in (#892, @gpetiot)
• Fix break-string-literals=newlines (#887, @gpetiot)
• Improve: Implement break-fun-sig without Location.is_single_line (#886, @Julow)
• Format gen_version.ml (#893, @hhugo)
• Improve: switch to ast 4.08 (#831, @hhugo)
• Fix formatting of arguments when break-fun-decl=fit-or-vertical (#884, @gpetiot)
• Test: extend max_indent test (#878, @trefis)
• Test: break_cases_normal_indent.ml is a symlink on break_cases_fit.ml (#879, @gpetiot)
• Improve unicode text length computation (#816, @gpetiot)
• Add an option to control the indentation of nested matches (#870, @trefis)
• Fix: properly interpret indicate-multiline-delimiters for if-then-elses (#874, @trefis)
• Enable warning 9 (#875, @hhugo)
• Fix unstable comment in let%ext (#873, @gpetiot)
• Improve: option max-indent (#841, @gpetiot)
• Improve: option nested-match=align (#827, @gpetiot)
• Fix dropped attributes in with_constraints (#846, @gpetiot)
• Fix dropped comments in list patterns and module types (#866, @gpetiot)
• Fix comment dropped in object (#849, @gpetiot)
• Fix inconsistency of break-separators for wildcards in match cases (#855, @gpetiot)
• Improve: new options to support 'with' and 'strict_with' (ocp-indent) (#853, @gpetiot)
• Improve: .ocamlformat-enable files listing files to format when ocamlformat is disabled (#854, @gpetiot)
• Check that all locations have been considered during formatting (#864, @hhugo)
• clean Hashtbl.Poly (#862, @hhugo)
• Fix: test.sh (#858, @hhugo)
• cleanup Cmts.ml (#861, @hhugo)
• Clean: Cleanup usage of Poly (#860, @hhugo)
• Fix: rename sexp_list into list (#859, @hhugo)
• Fix vim instructions (#852, @naartjie)
• Improve: options extension-indent and stritem-extension-indent (#840, @gpetiot)
• Fix comment dropped in field alias (#848, @gpetiot)
• Fix pro position for with_constraints (#847, @gpetiot)
• Improve: finer space-around-exp options (#837, @gpetiot)
• Improve: preserve blank lines in conventional and sparse profiles (#838, @gpetiot)
• Improve: don't fit tag-only comments after val declarations (#836, @Julow)
• Improve speed with ofday_unit_tests_v1.ml (#833, @hhugo)
• Fix exception when calling String.sub (#832, @gpetiot)
• Improve: implement doc-comments and doc-comments-tag-only for every items (#746, @Julow)
• Improve: Add field-space=tight-decl (#829, @Julow)
• Improve: make Sugar.list_exp and Sugar.list_pat tail-recursive (#823, @gpetiot)
• Improve: options 'let-binding-indent', 'type-decl-indent' and 'indent-after-in' (#822, @gpetiot)
• Fix: performance issue with deep asts (#826, @hhugo)
• Improve: preserve blank lines in sequences (#814, @gpetiot)
• Improve: tidying Fmt_ast.ml (#821, @gpetiot)
• Improve: space before type constraint in record (#819, @gpetiot)
• Improve: break-cases=fit-or-vertical (#820, @gpetiot)
• Improve: remove break before ending paren for anonymous functions (#818, @gpetiot)
• Improve: preserve the position of type annotation in bindings (#815, @gpetiot)
• Improve: preserve record type annot (#812, @gpetiot)
• Fix break before ending paren (#801, @gpetiot)
• Improve: better consistency between structures and signatures (#803, @gpetiot)
• Fix let module sparse (sparse mode only for module applications) (#809, @gpetiot)
• Improve: change formatting of newtypes (#811, @gpetiot)
• Improve: break-cases-all shouldn't break nested patterns (#810, @gpetiot)
• Fix: sugarized extensions (#805, @gpetiot)
• Improve: tidying Fmt_ast (#808, @gpetiot)
• Fix cmt in empty structure (#804, @gpetiot)
• Remove dead link to preset profiles (#806, @andschwa)
• Improve: break with type constraints (#797, @gpetiot)
• Fix colon break module type functor (#802, @gpetiot)
• Improve: K&R style for if-then-else (#787, @gpetiot)
• Improve: new option break-fun-sig (#785, @gpetiot)
• Improve: indentation consistency of '<-' and := (#780, @gpetiot)
• Fix: functor application and break-struct wrap incorrectly (#786, @gpetiot)
• Break after anonymous function arrow after infix op (#781, @gpetiot)
• Fix: type extension (#782, @gpetiot)
• Improve: Fmt.noop (#784, @gpetiot)
• Fix extension of value binding (#779, @chrismamo1)
• Improve: less sensitivity to concrete syntax (#767, @gpetiot)
• Fix missing space before attribute on includes (#775, @Julow)
• Improve: new option let-module (#768, @gpetiot)
• Improve: --disable-outside-detected-project is set by default (#761, @gpetiot)
• Fix weird parens break (#751, @gpetiot)
• Fix: if $XDG_CONFIG_HOME is either not set or empty, use $HOME/.config (#758, @gpetiot)
• Fix: --use-file/--impl/--intf should override file extension (#774, @gpetiot)
• Improve: less breaks for break-cases=all but correctly breaks or-patterns (#762, @gpetiot)
• Remove unecessary break on module pack constraints with with-constraints (#739, @Julow)
• Fix inconsistent break before module signature (#755, @gpetiot)
• Fix indentation of functor argument (#773, @gpetiot)
• Tidying fmt ast (#748, @gpetiot)
• Fix nested parens with no break infix before func (#760, @gpetiot)
• Provide an mli for Compat (#772) (hhugo) -Fix non-wrapping asterisk prefixed cmts (#759, @gpetiot)
• Support for OCaml 4.08 (#763, @hhugo)
• Fix module type functor (#716, @gpetiot)
• Small cleanup (#764, @hhugo)
• Fix: update ocamlformat-help.txt (follow up on #752) (#756, @gpetiot)
• Fix module pack and functor (#735, @Julow)
• Fix grammar: it's -> its (@anmonteiro)
• Improve: support --name with --inplace (#740, @jberdine)
• Fix: dropped comments for pexp_record (#743, @hhugo)
• Improve: comments arround attributes, fix #726 (#742, @hhugo)
• Update README for new profiles (#738, @jberdine)
• Remove deprecated 'default' profile (#736, @jberdine)
• Fix extra parens around ext match (#733, @gpetiot)
• Improve: factorize with compose_module (#729, @gpetiot)
• Test: exclude gen_version.ml from test (#732, @jberdine)
• Improve: make gen_version an ocaml script (#664, @hhugo)

• Small cleanup (#764, @hhugo)
• Support for OCaml 4.08 (#763, @hhugo)

• Admin: remove CHANGES.md that was essentially git log (@jberdine)
• Admin: simplify release procedure (@jberdine)
• Build: fix ocaml version constraint, need 4.06 (@jberdine)
• Improve: make gen_version an ocaml script (@hhugo)
• Improve: fix associativity of Pexp_setfield (#725, @jberdine)
• Improve: normalize setfield and setinstvar (#720, @gpetiot)
• Remove: deprecated config file syntax parsing (#715, @jberdine)
• Improve: put the equal first for ocp-indent-compat (#717, @gpetiot)
• Fix: parse docstrings once (#713, @gpetiot)
• Improve: new profiles conventional and ocamlformat (#663, @gpetiot)
• Revert module indentation (#714, @gpetiot)
• Fix infix wrap (#691, @gpetiot)
• Fix doc comments tag only when docstring parsing disabled (#711, @gpetiot)
• Fix missing space before closing paren around function (#705, @jberdine)
• Fix documentation of doc-comments-tag-only (#710, @gpetiot)
• Improve: module-item-spacing=preserve (#538, @gpetiot)
• Add a space in "Jane Street" (#703, @kevinji)
• Fix js_source.ml (#702, @gpetiot)
• Fix space-around-collection-expressions for record/variant definitions (#670, @Julow)
• Fix extra space ifthenelse (#700, @gpetiot)
• Improve split attribute in let binding for expect test with uncaught exn (#681, @gpetiot)
• Fix empty newline before equal (#701, @gpetiot)
• Fix double cmts (#678, @gpetiot)
• Fix value binding ocp indent compat (#694, @gpetiot)
• Fix ast changed when record ident constrained (#697, @gpetiot)
• Fix incorrect ocaml code (#698, @gpetiot)
• Fix fmt for CI (#693, @gpetiot)
• Fix record break (#689, @gpetiot)
• Fix break before parens no wrap fun args (#690, @gpetiot)
• Improve: disable conf in files and attributes (#684, @gpetiot)
• Fix space around tuples (#679, @gpetiot)
• Improve: break before in for let-module construct, because of ocp-indent (#685, @gpetiot)
• Improve debugging output (#677, @hhugo)
• Improve: group open/close of modules and fix indentation (#665, @gpetiot)
• Fix constrained match in record (#676, @gpetiot)
• Fix: formatting of end line comments (#662, @gpetiot)
• Fix cmt in fun when no break infix (#668, @gpetiot)
• Add the wrap-fun-decl option (#645, @Julow)
• Improve: break the list of 'with type' module constraints (#639, @gpetiot)
• Reduce the use of Poly comparisons (#661, @hhugo)
• Improve: check flag to check whether the input files already are formatted (#657, @gpetiot)
• Fix cmt placement infix op (#651, @gpetiot)
• Restore compat with base.v0.11 (@hhugo)
• Fix: disallow '-' with other inputs (#658, @hhugo)
• Fix build on OCaml 4.06.1 (#646, @Julow)
• Fix comments on record fields (#650, @Julow)
• Fix cmts in list (#654, @gpetiot)
• Improve: If-then-else = fit-or-vertical mode (#603, @gpetiot)
• Link to man page from readme (#648, @yawaramin)
• Fix indent match branches with cmts (#644, @gpetiot)
• Build: update to base v0.12 (#642, @jberdine)
• Fit tag-only doc comments (#637, @Julow)
• Fix try%lwt indent (#638, @gpetiot)
• Fix type manifest formatting (#616, @gpetiot)
• Fix: don't include ocamlformat_diff in ocamlformat (#636, @Khady)
• fix emacs setup (#631, @Khady)
• tools/update_tests.sh --all (#632, Julow)
• Fix: don't break line before wrapping comment (#634, @gpetiot)
• Fix ignored ocamlformat attribute (#615, @gpetiot)
• Include jsoo in the tests (#618, @hhugo)
• Fix missing break before comment (#613, @gpetiot)
• Do not rely on the file-system to format sources (#611, @hhugo)
• Ignore file in .ocamlformat-ignore (#606, @hhugo)
• Improve reason support (#608, @hhugo)
• Fix: fix fmt_ast wrt strings and chars when sources are not available (#607, @hhugo)
• Fix ocamlformat_reason (#604, @hhugo)
• Fix missing break for local open record patterns (#602, @gpetiot)
• Fix regression for variants with docstrings (#601, @gpetiot)
• Fix extra break in module pack type (#600, @Julow)
• Add the doc-comments-padding option (#575, @Julow)
• Improve: externalize Sugar functions from Fmt_ast.ml (#593, @gpetiot)
• Fix typedecl attribute (#595, @gpetiot)
• Improve: less linebreaks for break-cases=fit (#536, @gpetiot)
• fix #590 (#594, @hhugo)
• Make gen_version.sh use bash. (#592, @hhugo)
• Implement box debugging (#574, @Julow)
• Break closing bracket in polymorphic variants (#583, @Julow)
• Break comment record (#580, @Julow)
• missing headers (@hhugo)
• Improve: mishandling of field_space in record exps and patterns (#587, @jberdine)
• Add empty mli for executable (#591, @hhugo)
• tests: test ocamlformat when disabled (@hhugo)
• dont reformat if disabled (@hhugo)
• remove global ref in Transation_unit (@hhugo)
• Fix Emacs (>26.1) temporary buffer not killed (#567, @ludwigpacifici)
• Improve: opam file for ocamlformat_diff to remove the bos dependency (#579, @gpetiot)
• Fix: Require Octavius version 1.2.0 (#576, @Julow)
• Improve: record fields with type constraints (#565, @jberdine)
• Fix: comments attachment (#548, @gpetiot)
• Improve: parens around constrained any-pattern (#431, @gpetiot)
• Revise formatting of compact single case matches (#552, @jberdine)
• Fix typo in help text (#553) (Wilfred Hughes)
• Improve: calculate length of comment strings using UTF8 (#550, @jberdine)
• Admin: update travis versions of ocaml and opam (#551, @jberdine)
• Fix: missing break before ; _ (#549, @jberdine)
• Improve: module item spacing in sparse mode (#546, @jberdine)
• Improve: some simplifications (#542, @gpetiot)
• Improve: remove unnecessary parens when open module (#537, @gpetiot)
• Improve: not breaking after bind/map operators (#463, @gpetiot)
• Fix suboptimal docstring formatting (#540, @gpetiot)
• amend janestreet profile (#524, @mbarbin)
• Improve: option break-separators (#461, @gpetiot)
• Fix formatting of types with ocp-indent-compat=true (#525, @gpetiot)
• Preserve shebang (#533, @gpetiot)
• Fix: remove indented empty lines between comments (#531, @gpetiot)
• Improve: remove indented empty lines separating recursive modules (#528, @gpetiot)
• add update_tests.sh (#529, @gpetiot)
• Improve: space around collection expressions (#527, @gpetiot)
• Improve: remove more spaces inside parenthesized multiline constructs (#526, @gpetiot)
• Disable docstring parsing for external tests (#518, @gpetiot)
• Fix odoc normalize (#520, @gpetiot)
• Better docstring error msgs (#519, @gpetiot)
• Fix odoc seps (#511, @gpetiot)
• Improve: option 'single-case' (#426, @gpetiot)
• Add a parens-tuple-patterns configuration option (#498, @NathanReb)
• Fix: comments should not be parsed for diff (#509, @gpetiot)
• Fix: odoc refs (#510, @gpetiot)
• Fix formatting of or-patterns in try expressions (#503, @NathanReb)
• Test: improve test_branch.sh to allow different config for branch (#496, @jberdine)
• Improve: option 'parens-ite' (#430, @gpetiot)
• fix break-struct for toplevel items (not in a struct) (#497, @gpetiot)
• Fix: breaking of variant types (#486, @gpetiot)
• Improve: autocompletion of git branch names for test_branch.sh (#485, @gpetiot)
• Fix: Sanitize docstring check (#481, @gpetiot)
• Improve the formatting of lists in doc comments (#480, @jeremiedimino)
• Add PR test script and update contributing guidelines with expected usage (#479, @jberdine)
• Fix break struct natural (#443, @gpetiot)
• Fix: disable-outside-detected-project: disable ocamlformat when no .ocamlformat file is found (#475, @gpetiot)
• Improve: error message when docstrings move (#446, @gpetiot)
• Improve: print-config prints all options (#465, @gpetiot)
• Ocamldoc docstrings (#460, @gpetiot)
• Doc: disable-outside-detected-project (#468, @gpetiot)
• Improve: shorter output of regtests (#469, @gpetiot)
• Admin: add code of conduct and copyright headers to build and package system (@jberdine)
• Improve: add license header for tools/ocamlformat-diff/ocamlformat_diff.ml (#466, @gpetiot)
• Build: a few simplifications enabled by dune 1.1.1 (#457, @jberdine)
• Improve: record fields with attributes and docs in type definitions (#458, @jberdine)
• Fix exception comments (#459, @gpetiot)
• OCamlFormat diff tool (#450, @gpetiot)

• Improve: set break-sequences in sparse and compact profiles (#455, @jberdine)
• Improve: keep a space inside tuples parens (#453, @gpetiot)
• Improve: --root option to isolate configuration files (#402, @gpetiot)
• Fix: missing parens around partially-applied :: (#452, @jberdine)
• Fix: parens around expressions with attributes (#441, @gpetiot)
• Build: do not execute shell scripts directly in build (#448, @dra27)
• Add: read ocp indent config files (#445, @gpetiot)
• Improve: option 'break-sequences' (#434, @gpetiot)
• Improve: option 'no-indicate-multiline-delimiters' to have less whitespaces (#429, @gpetiot)
• Fix: outdent before arrow (#444, @gpetiot)
• Improve: User documentation (#449, @gpetiot)
• Improve: option 'cases-exp-indent' to adjust indent (#428, @gpetiot)
• Add: compact and sparse profiles (#408, @jberdine)
• Improve: explicit error message in case of 'permission denied' error (#425, @gpetiot)
• Fix: comment stabilization in Pexp_override (#422, @gpetiot)
• Fix: corner case while formatting type variables (#440, @hhugo)
• Fix: many missing comments (#418, @hhugo)
• Fix: asserts and attributes (#414, @hhugo)
• Fix: extension and attribute (#417, @hhugo)
• Improve: support for function%ext (#416, @hhugo)
• Fix: Inconsistent spacing around comments in signatures vs structures (#437, @gpetiot)
• Improve: better error with location when comment dropped (#401, @gpetiot)
• Fix doc comments (#413, @hhugo)
• Improve: use input_name for error messages (@hhugo)
• Improve: break after inherit (@hhugo)
• Fix: aliases inside constructor declaration (#424, @gpetiot)
• Fix: broken invariant for Pmod_unpack (#421, @gpetiot)
• Fix: print error details in debug mode only (#420, @hhugo)
• Fix: mark_parenzed_inner_nested_match (@hhugo)
• Improve: tune the janestreet profile (@hhugo)
• Improve: disable ocamlformat if no dot ocamlformat in the project (#391, @hhugo)
• Improve: new option to control spacing around let bindings (#344, @hhugo)
• Fix: prec of string/array sugar (#381, @hhugo)
• Fix: lost comment in constraint expression (#400, @gpetiot)
• Fix: lost cmt near functor (#399, @gpetiot)
• Improve: preset profiles (default & janestreet) (#390, @gpetiot)
• Improve: try to fit simple list/array elements on a single line (#375, @gpetiot)
• Fix: bad comment spacing with module-item-spacing=compact (#395, @gpetiot)
• Fix: dropped comment in revapply of extension (#394, @gpetiot)
• Improve: let-and structures spacing depends on module-item-spacing (#367, @gpetiot)
• Fix: consecutive prefix operator (#386, @hhugo)
• Fix: invalid (#383, @hhugo)
• Fix: lazy and alias (#388, @hhugo)
• Improve: main loop and error reporting (#389, @hhugo)
• Fix: exposed_left_typ (#385, @hhugo)
• Fix: rec functor (#382, @hhugo)
• Fix: while%ext/for%ext (@hhugo)
• Fix: more on class (@hhugo)
• Fix: invalid syntax on class (@hhugo)
• Improve: follow XDG for global config files (@gpetiot)
• Improve: add support for bigarray sugar index operator (@hhugo)
• Add: support reading input from stdin (#353, @bkase)
• Fix: the precedence of options (@gpetiot)
• Improve: doc of config option choice alternatives (#354, @jberdine)
• Improve: string formatting (@hhugo)

• Improve: simplify setting option defaults, slight --help improvement (#350, @jberdine)
• Improve: update emacs mode to use replace-buffer-contents (#345, @hhugo)
• Improve: add option to not force-break structs (#346, @jberdine)
• Improve: move 'formatting' options into separate section (#348, @gpetiot)
• Improve: fun sugar (@hhugo)
• Improve: add option to omit open lines between one-line module items (#303, @gpetiot)
• Fix: infix ops (@hhugo)
• Improve: reformat files with no locations (@hhugo)
• Improve: better error when max-iters = 1 (@hhugo)
• Improve: breaking before arrows in pattern match cases (@jberdine)
• Improve: no parens for trailing 'not' (@hhugo)
• Improve: missing break hint, fix #331 (@hhugo)
• Improve: comments before match (#330, @jberdine)
• Fix: missing comments (@hhugo)
• Fix: missing attributes due to sugar (@hhugo)
• Fix: parens non trivial rhs for # infix ops (@hhugo)
• Improve: let-module-in break before in (#328, @jberdine)
• Improve: sugar for nestest module_with (@hhugo)
• Improve: attributes on let bindings (#324, @jberdine)
• Improve: wrapping of functor args in type declaration (#315, @gpetiot)
• Fix: comments attachment with infix ops (@hhugo)
• Fix: comments attachment with Pexp_fun (@hhugo)
• Fix: docstrings as attributes (@hhugo)
• Improve: refactor and improve documentation of options (#302, @gpetiot)
• Improve: error reporting in emacs integration (#304, @jberdine)
• Improve: pexp_open as final arg of infix op (#314, @jberdine)
• Fix: missing parens around labeled record pattern arg (@jberdine)
• Fix: missing attributes (@hhugo)
• Fix: duplicated (x3) attributes in pexp_letmodule (@hhugo)
• Improve: allow to locally disable ocamlformat (@hhugo)
• Improve: corner case indentation of fun -> function (#312, @jberdine)
• Improve: labeled, optional, and default args (@jberdine)
• Improve: punning default arg with type constraint (@jberdine)
• Improve: add options to controls various spaces (#284, @hhugo)
• Improve: add option to disable wrapping fun args (#283, @hhugo)
• Improve: add option --break-cases to break each pattern-matching case (#251, @gpetiot)
• Improve: rename --nested-parens option (@hhugo)
• Improve: ws before colon for constraint (#293, @hhugo)
• Improve: option to choose where to parens nested match (@hhugo)
• Improve: always parens nested match (even the right most one) (@hhugo)
• Improve: always break for let_and contruct (@hhugo)
• Fix: missing comments (@hhugo)
• Improve: Add option to preserve style of local module open (#267, @gpetiot)
• Improve: preserve extension point formatting (@hhugo)
• Improve: make double semi consistent between implementation and use_file (#292, @hhugo)
• Improve: configure ocamlformat using attributes (@hhugo)
• Improve: extension point (@hhugo)
• Improve: break in type declaration for variant and record (#280, @hhugo)
• Fix: memory leak (@hhugo)
• Test: add ocaml compiler to test suite, and improve make -C test (@jberdine)
• Fix: unary operator +/- (@hhugo)
• Fix: doc comments in class (@hhugo)
• Fix: ocaml bug, sort fields (@hhugo)
• Improve: empty mod with comments (@hhugo)
• Improve: disable warning generated by the lexer in quiet mode (@hhugo)
• Fix: record update (@hhugo)
• Fix: rec let binding and attribute (@hhugo)
• Fix: punning (@hhugo)
• Fix: let open and constraint (@hhugo)
• Fix: not extension sugar when attribute (@hhugo)
• Fix: no-comment-check missing case (@hhugo)
• Fix: string literal (@hhugo)
• Fix: format of infix in presence of %; (@hhugo)
• Fix: let binding and type annot (@hhugo)
• Fix: binding when lhs is an extension (@hhugo)
• Fix: pat constraint in payload (@hhugo)
• Fix: let rec with extension (@hhugo)
• Fix: comments (@hhugo)
• Fix: comments in fmt_case (@hhugo)
• Fix: comments around Longident (@hhugo)
• Fix: missing comment for pmty_with (@hhugo)
• Improve: add option to disambiguate infix precedence with parens (@jberdine)
• Improve: not when infix op arg (@jberdine)
• Improve: add a flag to skip all checks about comments (@hhugo)
• Improve: breaking of module ident/unpack/extension exps (#269, @jberdine)
• Fix: literal sub-exps with attributes (@jberdine)
• Fix: many fixes regarding attributes (@hhugo)
• Improve: preserve formatting of block comments (#255, @hhugo)
• Improve: breaking of applications with long literal list args (#258, @jberdine)
• Fix: sugar functor (@hhugo)
• Fix: type alias in variant (@hhugo)
• Improve: formatting of comments (@jberdine)
• Fix: prefix operators (@hhugo)
• Fix: exception declarations (@hhugo)
• Fix: doc comments in structure (#250, @hhugo)
• Fix: add parens around pat with trailing attr (@hhugo)
• Fix: let binding and Ppat_or (@hhugo)
• Fix: be more permissive with pattern (@hhugo)
• Fix: fix string_literal with when its location includes its attribute (#244, @hhugo)
• Improve: improve errors returned to the user. (#243, @hhugo)
• Fix: missing comments for Pexp_construct (#240, @hhugo)
• Fix: multiple fixes around classes (#242, @hhugo)
• Fix: comments in empty () and [] (#241, @hhugo)
• Fix: support empty variant (#239, @hhugo)
• Fix: add missing attribute (#238, @hhugo)
• Fix: be more permissive with ppat_interval (#237, @hhugo)
• Improve: remove trailing ws (#210, @hhugo)
• Improve: attributes on type declarations (#232, @jberdine)
• Improve: breaking of infix Array and String get and set ops (#233, @jberdine)
• Fix: attributes and doc comments (#221, @hhugo)
• Improve: spacing of module unpack (#230, @jberdine)
• Improve: no parent for new (@hhugo)
• Fix: Revert: Improve: remove redundant parens around application operators (@hhugo)
• Improve: array alignment (#226, @hhugo)
• Improve: nested array infix ops (#225, @hhugo)
• Fix: is_adjacent and remove [~inclusive] from [Source.string_between] (@hhugo)
• Fix: Cmts.CmtSet.split (@hhugo)
• Improve: Allow comments inside empty delimited "things" (#223, @hhugo)
• Fix: Source.ends_line (#222, @hhugo)
• Improve: empty struct and sig (#217, @hhugo)
• Improve: support for toplevel files (#218, @hhugo)
• Fix: string literal, fix #214 (#219, @hhugo)
• Improve: more tuning for functors (@hhugo)
• Improve: sugar for functor type with multiple args (@hhugo)
• Improve: sugar for functors with multiple args (@hhugo)
• Improve: module type with (@hhugo)
• Improve: break before with/and type (@hhugo)
• Improve: break between fun args (@hhugo)
• Improve: module unpacking (#215, @hhugo)
• Improve: for & while loops (#211, @hhugo)
• Fix: attributes on ite (#209, @hhugo)
• Fix: partially applied (+) and (-) (#208, @hhugo)
• Fix: polymorphic variant (#202, @hhugo)
• Fix: parens with lazy pat (fix #199) (#201, @hhugo)
• Improve: omit excess indentation of function cases (@jberdine)
• Improve: extensions with payloads of multiple structure items (@jberdine)
• Improve: parenthesization and attribute placement of if-then-else (@jberdine)
• Fix: do not attach comments to docstrings (@jberdine)
• Fix: short syntax for extensions (#193, @hhugo)
• Fix: missing attrs for pcl_fun (@hhugo)
• Fix: pos of attribute for functors (@hhugo)
• Fix: () module only if not attrs (@hhugo)
• Fix: missing attrs for object (@hhugo)
• Fix: no short form of extension with attribs (@hhugo)
• Fix: normalization for Pexp_poly and Pexp_constraint (#190, @hhugo)
• Fix: some parenthesization context checks (#189, @hhugo)
• Fix: attributes on fun expressions (@jberdine)
• Fix: extensions with multiple module-level eval expressions (#185, @jberdine)
• Fix: functor & apply (#182, @hhugo)
• Fix: module rec with (@hhugo)
• Fix: more parens in pat_constraint (@hhugo)
• Improve: tuple & constraint (@hhugo)
• Improve: empty module (#178, @hhugo)
• Fix: extensible variant (#177, @hhugo)
• Fix: index operator (#176, @hhugo)
• Improve: empty module sig (@hhugo)
• Fix: add attributes to module signature (@hhugo)
• Add: support for objects and classes (#173, @hhugo)
• Improve: remove some redundant parens around tuple types (@jberdine)
• Fix: args in let bindings (@hhugo)
• Improve: let module%ext (@hhugo)
• Fix: infix op in alias (@hhugo)
• Fix: extensions pat (@hhugo)
• Fix: limit use of short syntax for extensions (@hhugo)
• Improve: allow break after Psig_include (@jberdine)
• Fix: { (a; b) with a; b } (@hhugo)
• Fix: with type [longident] (@hhugo)
• Fix: attributes on polymorphic variants (@hhugo)
• Fix: attribute in let bindings (@hhugo)
• Fix: private in extensible variant (@hhugo)
• Fix: gadt in extensible variant (@hhugo)
• Fix: missing parens in list pattern (@hhugo)
• Improve: format [new e] like an apply (@hhugo)
• Fix: parens for constraint (@hhugo)
• Fix: avoid emitting >] which is an unparsable keyword (#171, @hhugo)
• Fix: misplaced comments on module type of (@jberdine)

Features

• Add: option to align all infix ops (#150, @hhugo)
• Add: option to attempt to indent the same as ocp-indent (#162)
• Add: option for no discretionary parens for tuples (#157, @hhugo)
• Add: alternative format for if-then-else construct (#155, @hhugo)
• Add: option to customize position of doc comments (#153, @hhugo)

Bug fixes

• Fix: dropped item attributes on module expressions
• Fix: toplevel let%ext (#167, @hhugo)
• Fix: parens around type alias & empty object type (#166, @hhugo)
• Fix: missing comments for [let open] (#165, @hhugo)
• Fix: missing comments in ppat_record (#164, @hhugo)
• Fix: check_typ wrt constraint on module type (#163, @hhugo)
• Fix: let binding with constraint (#160, @hhugo)
• Fix: handle generative functor type (#152, @hhugo)

Formatting improvements

• Improve: remove redundant parens around application operators
• Improve: parenthesize and break infix constructors the same as infix ops
• Improve: consider prefix ops and not to be trivial if their arg is
• Improve: align arrow type args and do not wrap them (#161)
• Improve: formatting for multiple attributes (#154, @hhugo)
• Improve: keep the original string escaping (#159, @hhugo)
• Improve: discretionary parens in patterns (#151, @hhugo)
• Improve: breaking of infix op arguments
• Improve: consider some extensions to be "simple"
• Improve: punning (#158, @hhugo)
• Improve: force break of let module/open/exception/pats (#149, @hhugo)

Build, packaging, and testing

• Add support for bisect (#169, @hhugo)
• Exclude failing tests from make -C test

Features

• Add: support for new%js (#136, @hhugo)
• Add: support for Ptyp_object (#104, @smondet)
• Use original filename when given in error messages. (#96, @mbarbin)

Bug fixes

• Fix: allow extensions in types (#143, @hhugo)
• Fix: parens on symbol type constructor
• Fix: parenthesization of '!=' partial application as a prefix op (#126, @hhugo)
• Fix: parens around Ppat_constraint under Pexp_match or Pexp_try (#124, @hhugo)
• Fix: parenthesization of tuple args of variant type declarations (#122, @hhugo)
• Fix: missing parens around list inside Constr pattern (#123, @hhugo)
• Fix: incorrect breaking of long strings (#130, @hhugo)
• Fix: missing parens inside array literal (#129, @hhugo)
• Fix: attributes on arguments of function (#121, @hhugo)
• Fix: floating docstrings within a type declaration group
• Fix: missing parens in sugared Array.set
• Fix: missing attributes on patterns
• Fix: is_prefix_id for != (#112, @hhugo)
• Fix: missing parens around module value types in signatures (#108, @hcarty)
• Fix: floating docstrings within a value binding group
• Fix: missing attributes on extension points (#102, @hcarty)
• Fix: extensible variants with aliases (#100, @hcarty)
• Fix: several issues with extension sequence expressions
• Fix: generative functors
• Fix: preserve files with an empty ast (instead of failing) (#92, @mbarbin)
• Fix: missing extension on Pexp_sequence
• Fix: missing docstrings and attributes on types
• Fix: missing parens around sugared Array and String operations
• Fix: missing parens around Pexp_newtype
• Fix: missing parens around Ppat_constraint, Ppat_or, and Ppat_unpack
• Fix: dropped space when string wrapped between spaces
• Fix: repeated ppx extension on mutual/recursive let-bindings (#83, @mbarbin)
• Fix: dropped comments on Pmty_typeof
• Fix: missing parens around Ppat_unpack under Ppat_constraint

Formatting improvements

• Improve: two open lines following multiline definition only with --sparse (#144)
• Improve: indent rhs of ref update (#139, @hhugo)
• Improve: no parens around precedence 0 infix ops (refines #115) (#141, @hhugo)
• Improve: support (type a b c) (#142, hhugo)
• Improve: no parens for { !e with a } (#138, @hhugo)
• Improve: no parens for constr inside list pattern. (#140, @hhugo)
• Improve: generative functor applications (#137, @hhugo)
• Improve: omit parens around lists in local opens (#134, @hhugo)
• Prepare for ocaml#1705 (#131, @hhugo)
• Improve: comment wrapping for dangling close
• Improve: if-then-else conditions that break
• Improve: suppress spurious terminal line break in wrapped strings
• Improve: parens for nested constructors in pattern (#125, @hhugo)
• Improve: remove duplicate parens around Ptyp_package
• Improve: indentation after comment within record type declaration
• Improve: add discretionary parens on nested binops with different precedence
• Improve: empty module as functor argument (#113, @hhugo)
• Improve: indentation of multiple attributes
• Improve: attributes on short structure items
• Improve: attributes on type declarations
• Improve: tuple attribute args
• Improve: parenthesization of Ppat_or
• Improve: determination of file kind based on provided name
• Improve: extension on the let at toplevel: e.g. let%expect_test _ (#94, @mbarbin)
• Improve: constraints in punned record fields (#93, @mbarbin)
• Improve: nullary attributes
• Improve: Ppat_tuple under Ppat_array with unnecessary but clearer parens
• Improve: breaking of arguments following wrapped strings

Build, packaging, and testing

• Simplify using (universe) support in jbuilder 1.0+beta20
• Add some regtests (#135, @hhugo)
• Upgrade to Base v0.11.0 (#103, @jeremiedimino)
• Add Travis CI script
• Fix: build [make reason] (#97, @mbarbin)
• Simplify Makefile due to jbuilder 1.0+beta18

Features

• Wrap lines in string literals, comments and docstrings
• Improve char escaping to ascii / uniform hexa / utf8 (#73)
• Add support for Pexp_new expressions (#76, @smondet)
• Add support for Pexp_send _ expressions (#72, @smondet)
• Add options to format chars and break strings (#70, @smondet)
• Formatting of %ext on if/while/for/match/try/; (#63, @hcarty)
• Disable formatting with [@@@ocamlformat.disable] (#66, @hcarty)

Formatting improvements

• Improve sequences under if-then-else with unnecessary but safer parens
• Improve optional arguments with type constraints
• Improve let-bound functions with type constraints
• Improve newtype constraints in let-bindings
• Improve placement of exception docstrings

Bug fixes

• Fix missing break hint before comment on sugared []
• Fix formatting of [%ext e1]; e2 (#75, @hcarty)
• Fix missing parens around let exception, let module, for, while under apply
• Fix missing parens under alias patterns
• Fix placement of attributes on extension constructors
• Fix missing parens around unpack patterns
• Fix let-bindings with pattern constraints
• Fix mutually recursive signatures

Features

• Check fatal warnings not only in inplace mode

Documentation

• Improve doc of --no-warn-error
• Mention object language not implemented
• Update documentation of --output

Bug fixes

• Colon instead of arrow before type for GADT constructors with no arguments (@mbouaziz)
• Fix some dropped comments attached to idents
• Fix missing parens around Ppat_alias under Ppat_variant
• Fix module type constraints on functors
• Fix broken record field punning
• Fix broken docstring attachment with multiple docstrings
• Fix missing parens around application operators
• Fix missing parens around Ppat_or under Ppat_variant
• Fix missing/excess parens around Pexp_open under Pexp_apply/Pexp_construct
• Fix duplicated attributes on Pexp_function
• Fix missing parens around Ptyp_package under Pstr_type
• Add '#' to the list of infix operator prefix (@octachron)
• Do not add space between [ and < or > in variant types
• Add a break hint before "constraint" in a type def (@hcarty)

Formatting improvements

• Remove unnecessary parens around Pexp_tuple under Pexp_open
• Improve single-case matches
• Improve constructor arguments
• Remove unnecessary parens around match, etc. with attributes
• Fix missing parens around constraint arg of variant type
• Fix missing parens on left arg of infix list constructor
• Fix missing parens around arrow type args of variant constructors
• Fix missing parens around type of constraints on module exps

Build and packaging

• Separate Format patch into ocamlformat_support package
• Fix test script
• Unbreak build of ocamlformat_reason.ml (@mroch)
• Improve opam installation (JacquesPa)
• Install emacs support via opam package

Features

• Output to stdout if output file omitted

Bug fixes

• Fix Ppat_any value bindings
• Fix missing parens around variant patterns in fun arg
• Fix position of comments attached to end of sugared lists
• Fix missing comments on module names
• Fix package type constraints
• Fix first-class module alias patterns
• Fix first-class module patterns in let bindings
• Fix missing parens around Ptyp_package under Psig_type
• Fix missing "as" in Ptyp_alias formatting (@hcarty)
• Fix let bindings with constraints under 4.06

Formatting improvements

• Improve line breaking of or-patterns
• Improve placement of comments within pattern matches
• Improve clarity of aliased or-patterns with parens
• Improve matches on aliased or-patterns
• Improve infix applications in limbs of if-then-else
• Improve final function arguments following other complex arguments
• Improve consistency of paren spacing after Pexp_fun
• Improve sugar for Pexp_let under Pexp_extension
• Improve sugar for newtype
• Improve first-class module expressions
• Improve indentation when comments are sprinkled through types
• Do not add open line after last binding in a structure

Build and packaging

• Simplify build and packaging, and adopt some common practices
• Add Warnings.Errors argument for < 4.06 compatibility (@hcarty)
• Update base to v0.10.0 (@hcarty)