reason

## 3.3.3 - More fixes for fast pipe ([2120](https://github.com/facebook/reason/pull/2120), [2119](https://github.com/facebook/reason/pull/2119), [2111](https://github.com/facebook/reason/pull/2111)). - Fix regressed printing of first-class module ([2124](https://github.com/facebook/reason/pull/2124)). - Fix local open printing for `bs.obj` ([2123](https://github.com/facebook/reason/pull/2123)). - fix printing of `foo[(bar + 1)]` to `foo[bar + 1]` ([2110](https://github.com/facebook/reason/pull/2110)). - Only wrap `fun` in parentheses when necessary ([2033](https://github.com/facebook/reason/pull/2033)). - Change all precedence printing to braces for consistency inside JSX ([2106](https://github.com/facebook/reason/pull/2106)). - Format docblock comments above std attrs on record rows ([2105](https://github.com/facebook/reason/pull/2105)). ## 3.3.2 Big release! No breaking change. Big shout out to [@anmonteiro](https://twitter.com/anmonteiro90) and [@iwanKaramazow](https://twitter.com/_iwan_refmt)! Major: - Fast pipe `|.` now got a Reason sugar, `->`, with better precedence support than the former ([1999](https://github.com/facebook/reason/pull/1999), [2078](https://github.com/facebook/reason/pull/2078), [2092](https://github.com/facebook/reason/pull/2092), [2082](https://github.com/facebook/reason/pull/2082), [2087](https://github.com/facebook/reason/pull/2087), [2055](https://github.com/facebook/reason/pull/2055)). - ReasonReact JSX PPX DOM children spread ([2095](https://github.com/facebook/reason/pull/2095)). - ReasonReact JSX PPX fragment ([2091](https://github.com/facebook/reason/pull/2091)). - Other ReasonReact JSX PPX fixes ([2088](https://github.com/facebook/reason/pull/2088), [2060](https://github.com/facebook/reason/pull/2060), [2027](https://github.com/facebook/reason/pull/2027), [2024](https://github.com/facebook/reason/pull/2024), [2007](https://github.com/facebook/reason/pull/2007), [2021](https://github.com/facebook/reason/pull/2021), [1963](https://github.com/facebook/reason/pull/1963)). - Semicolon relaxation & reporting improvements ([2040](https://github.com/facebook/reason/pull/2040), [2012](https://github.com/facebook/reason/pull/2012), [1968](https://github.com/facebook/reason/pull/1968)). - Module parsing & formatting improvements ([2061](https://github.com/facebook/reason/pull/2061), [2059](https://github.com/facebook/reason/pull/2059), [1984](https://github.com/facebook/reason/pull/1984), [1949](https://github.com/facebook/reason/pull/1949), [1946](https://github.com/facebook/reason/pull/1946), [2062](https://github.com/facebook/reason/pull/2062)). - Remove extra space in some places after formatting ([2047](https://github.com/facebook/reason/pull/2047), [2041](https://github.com/facebook/reason/pull/2041), [1969](https://github.com/facebook/reason/pull/1969), [1966](https://github.com/facebook/reason/pull/1966), [2097](https://github.com/facebook/reason/pull/2097)). - Much better `...` spread errors for everything ([1973](https://github.com/facebook/reason/pull/1973)). - Fix `foo##bar[baz]`, `foo->bar^##baz` and other precedences ([2050](https://github.com/facebook/reason/pull/2050), [2055](https://github.com/facebook/reason/pull/2055), [2044](https://github.com/facebook/reason/pull/2044), [2044](https://github.com/facebook/reason/pull/2044)). - Milder "unknown syntax error" message ([1962](https://github.com/facebook/reason/pull/1962)). Others: - Parentheses hugging for multi-line `Js.t({foo: bar})` ([2074](https://github.com/facebook/reason/pull/2074)). - Correctly parse prefix ops in labeled parameters ([2071](https://github.com/facebook/reason/pull/2071)). - Attach doc attributes before extension sugar ([2069](https://github.com/facebook/reason/pull/2069)). - Support non-parenthesized label colon type equal optional in type declarations ([2058](https://github.com/facebook/reason/pull/2058)). - Printf uncurried application when last argument is a callback ([2064](https://github.com/facebook/reason/pull/2064)). - OCaml rtop syntax printing( [2031](https://github.com/facebook/reason/pull/2031)). - Fix Bigarray syntax ([2045](https://github.com/facebook/reason/pull/2045)). - Parse `M.[]` ([2043](https://github.com/facebook/reason/pull/2043)). - Fix printing of polymorphic variant with annotation ([2019](https://github.com/facebook/reason/pull/2019)). - Format GADT type variants better ([2016](https://github.com/facebook/reason/pull/2016)). - Better autocomplete for Merlin ([1998](https://github.com/facebook/reason/pull/1998)). - Print newline after doc comments before attributes ([1869](https://github.com/facebook/reason/pull/1869)). - Fix inconsistent printing of opening extension expressions ([1979](https://github.com/facebook/reason/pull/1979)). - Fix error when parsing `let x=-.1;` and others ([1945](https://github.com/facebook/reason/pull/1945)). - Arguments no longer accidentally punned when they carry attributes ([1955](https://github.com/facebook/reason/pull/1955)). ## 3.2.0 See the blog post [here](https://reasonml.github.io/blog/2018/05/25/reason-3.2.0.html). - **WHITESPACES IMPROVEMENTS ARE HERE**: empty lines between most things will now be preserved when you format your code! Multiple lines still collapse to one line in most cases ([1921](https://github.com/facebook/reason/pull/1921), [1919](https://github.com/facebook/reason/pull/1919), [1876](https://github.com/facebook/reason/pull/1876)). - **Semicolon relaxation**: see blog post ([1887](https://github.com/facebook/reason/pull/1887)). - Fix parsing & printing of es6 function syntax inside attributes ([1943](https://github.com/facebook/reason/pull/1943)). - List spread now has better error ([1925](https://github.com/facebook/reason/pull/1925)). - Functor in JSX tags ([1927](https://github.com/facebook/reason/pull/1927)). - Better comment printing ([1940](https://github.com/facebook/reason/pull/1940), [1934](https://github.com/facebook/reason/pull/1934)). - Various other printer improvements. ## 3.1.0 - **New pipe sugar for function call argument in arbitrary position**: `foo |> map(_, addOne) |> filter(_, isEven)` ([1804](https://github.com/facebook/reason/pull/1804)). - **BuckleScript [@bs] uncurry sugar**: `[@bs] foo(bar, baz)` is now `foo(. bar, baz)`. Same for declaration ([1803](https://github.com/facebook/reason/pull/1803), [1832](https://github.com/facebook/reason/pull/1832)). - **Trailing commas** for record, list, array, and everything else ([1775](https://github.com/facebook/reason/pull/1775), [1821](https://github.com/facebook/reason/pull/1821))! - Better comments interleaving ([1769](https://github.com/facebook/reason/pull/1769), [1770](https://github.com/facebook/reason/pull/1770), [1817](https://github.com/facebook/reason/pull/1817)) - Better JSX printing: `<Foo bar=<Baz />>`, `<div><span></span></div>` ([1745](https://github.com/facebook/reason/pull/1745), [1762](https://github.com/facebook/reason/pull/1762)). - **switch** now mandates parentheses around the value. Non-breaking, as we currently support parentheses-less syntax but print parens ([1720](https://github.com/facebook/reason/pull/1720), [1733](https://github.com/facebook/reason/pull/1733)). - Attributes on open expressions ([1833](https://github.com/facebook/reason/pull/1833)). - Better OCaml 4.06 support ([1709](https://github.com/facebook/reason/pull/1709)). - Extension points sugar: `let%foo a = 1` ([1703](https://github.com/facebook/reason/pull/1703))! - Final expression in a function body now also has semicolon. Easier to add new expressions afterward now ([1693](https://github.com/facebook/reason/pull/1693))! - Better editor printing (outcome printer) of Js.t object types, @bs types, unary variants and infix operators ([1688](https://github.com/facebook/reason/pull/1688), [1784](https://github.com/facebook/reason/pull/1784), [1831](https://github.com/facebook/reason/pull/1831)). - Parser doesn't throw Location.Error anymore; easier exception handling when refmt is used programmatically ([1695](https://github.com/facebook/reason/pull/1695)). ## 3.0.4 - **Default print width is now changed from 100 to 80** ([1675](https://github.com/facebook/reason/pull/1675)). - Much better callback formatting ([1664](https://github.com/facebook/reason/pull/1664))! - Single argument function doesn't require wrapping the argument with parentheses anymore ([1692](https://github.com/facebook/reason/pull/1692)). - Printer more lenient when user writes `[%bs.obj {"foo": bar}]`. Probably a confusion with just `{"foo": bar}` ([1659](https://github.com/facebook/reason/pull/1659)). - Better formatting for variants constructors with attributes ([1668](https://github.com/facebook/reason/pull/1668), [1677](https://github.com/facebook/reason/pull/1677)). - Fix exponentiation operator printing associativity ([1678](https://github.com/facebook/reason/pull/1678)). ## 3.0.2 - **JSX**: fix most of the parsing errors (#856 #904 [1181](https://github.com/facebook/reason/pull/1181) [1263](https://github.com/facebook/reason/pull/1263) [1292](https://github.com/facebook/reason/pull/1292))!! Thanks @IwanKaramazow! - In-editor syntax error messages are now fixed! They should be as good as the terminal ones ([1654](https://github.com/facebook/reason/pull/1654)). - Polymorphic variants can now parse and print \`foo(()) as \`foo() ([1560](https://github.com/facebook/reason/pull/1560)). - Variant values with annotations like `Some((x: string))` can now be `Some(x: string)` ([1576](https://github.com/facebook/reason/pull/1576)). - Remove few places remaining that accidentally print `fun` for functions ([1588](https://github.com/facebook/reason/pull/1588)). - Better record & object printing ([1593](https://github.com/facebook/reason/pull/1593), [1596](https://github.com/facebook/reason/pull/1596)). - Fewer unnecessary wrappings in type declarations and negative constants ([1616](https://github.com/facebook/reason/pull/1616), [1634](https://github.com/facebook/reason/pull/1634)). - Parse and print attributes on object type rows ([1637](https://github.com/facebook/reason/pull/1637)). - Better printing of externals with attributes ([1640](https://github.com/facebook/reason/pull/1640)). - Better printing for multiple type equations in a module type in a function argument ([1641](https://github.com/facebook/reason/pull/1641)). - Better printing for unary -. in labeled argument ([1642](https://github.com/facebook/reason/pull/1642)). ## 3.0.0 Our biggest release! **Please see our blog post** on https://reasonml.github.io/blog/2017/10/27/reason3.html. Summary: this is, practically speaking, a **non-breaking** change. You can mix and match two projects with different syntax versions in BuckleScript 2 (which just got release too! Go check), and they'll Just Work (tm). To upgrade your own project, we've released a script, https://github.com/reasonml/upgradeSyntaxFrom2To3 Improvements: - Much better printing for most common idioms. - Even better infix operators formatting for `==`, `&&`, `>` and the rest ([1380](https://github.com/facebook/reason/pull/1380), [1386](https://github.com/facebook/reason/pull/1386), etc.). - More predictable keyword swapping behavior ([1539](https://github.com/facebook/reason/pull/1539)). - BuckleScript's `Js.t {. foo: bar}` now formats to `{. "foo": bar}`, just like its value counterpart (`[%bs.obj {foo: 1}]` to `{"foo": bar}`. - `[@foo]`, `[@@foo]` and `[@@@foo]` are now unified into `[@foo]` and placed in front instead of at the back. - `!` is now the logical negation. It was `not` previously. - Dereference was `!`. Now it's a postfix `^`. - Labeled argument with type now has punning! - String concat is now `++` instead of the old `^`. - For native, Reason now works on OCaml 4.05 and the latest topkg ([1438](https://github.com/facebook/reason/pull/1438)). - Record field punning for module field prefix now prints well too: `{M.x, y}` is `{M.x: x, y: y}`. - JSX needs `{}` like in JS. - Fix reason-specific keywords printing in interface files (e.g. `==`, `match`, `method`). - Record punning with renaming ([1517](https://github.com/facebook/reason/pull/1517)). - The combination of function label renaming + type annotation + punning is now supported! - Label is now changed from `::foo` back to `~foo`, just like for OCaml. - Fix LOTS of bugs regarding parsing & formatting (closing around 100 improvement-related issues!). - Official `refmt.js`, with public API. See `README.md`. - Official `refmt` native public API too. - **New JS application/abstraction syntax**. Yes yes, we know. Despite the 100+ fixes, this one's all you cared about. Modern software engineering ¯\\\_(ツ)\_/¯. Please do read the blog post though. Breaking Changes: - Remove `--use-stdin` and `--is-interface-pp` option from refmt; they've been deprecated for a long time now - Remove unused binaries: `reup`, etc. - Remove the old `reactjs_jsx_ppx.ml`. You've all been on `reactjs_jsx_ppx_2.ml` for a long time now. - Reserved keywords can no longer be used as an `external` declaration's labels. Deprecated: - Deprecate `--add-printers` option from refmt; we'll have a better strategy soon. ## 1.13.7 - Much better infix operators (e.g. |>) formatting! ([1259](https://github.com/facebook/reason/pull/1259)) - Official `refmt.js`, with public API. See `README.md`. We've back-ported this into the 1.13.7 release =) ## 1.13.6 - Changelog got sent into a black hole