## V 0.2 *22 Dec 2020* - Compile-time memory management via `-autofree`. [Video demonstration](https://www.youtube.com/watch?v=gmB8ea8uLsM). It will be enabled by default in 0.3 - Channels and locks. - Thread safe typed arrays via keyword `shared`. - Struct embedding. - IO streams. - A powerful websocket module that conforms to RFC 6455 and passes the Autobahn test suite (498 client tests and 249 server tests). - The `net` module is now asynchronous and uses an API very similar to Go's `net`. - V's graphics module now uses Metal/DirectX/OpenGL instead of just OpenGL. - V can now run in the browser via WASM and execute V code by translating it to JavaScript: https://v-wasm.now.sh - V binaries for Linux/Windows/macOS are now built and deployed automatically via GitHub Actions. - Smart casting for sumtypes and interfaces, including complex expressions: `if x.expr is int { println(x.expr + 1) }`. - Clean and easy way to sort arrays: `users.sort(a.name > b.name)`. - A huge amount of `vfmt` fixes and improvements. It has now reached a point where it can be safely used on any V source file. - A new CI job that runs `v fmt -verify` on the entire code base, a new command that makes sure the file/directory has been vfmt'ed. This ensures that all code submitted to the V project is formatted. - A new tool `v vet` for analyzing the project and finding potential bugs and errors. - A new `term.ui` module for building dynamic terminal UIs with an example editor written in it. - Early iOS and Android support. - All missing ORM features from the old backend were brought back. - Magic `it` variable has been replaced with smart casts (the change is completely handled by vfmt). - Cross-compiling to Windows and Linux brought back. - C2V can now generate wrappers. Example: https://github.com/medvednikov/libsodium. (C2V will be released by 0.3) - C++ compiler support: code, generated by the C backend can now by compiled by C++ compilers. - Short generics syntax: `foo(5)` instead of `foo(5)`. - Cached modules via `-usecache`. Faster compilation due to not needing to rebuild the entire vlib for each program. Will be enabled by default in 0.2.1. - New improved sum types implementation. - Lots of errors that happen often during the development cycle were turned into warnings to increase development speed. They are still errors in production builds. - Labeled `break` and `continue`. - Lots of documentation. The official language documentation grew 3 times in size. - `modules.vlang.io` is now generated automatically on every commit. - Builtin compile-time JSON serializer now supports `time.Time`. - Fixes in type aliases, to make them behave just like the types they alias. - `array.contains(element)` is now generic. - Lots of improvements in the JS backend and its type system. - Simpler and more constinent function arg syntax: `foo(a int, b int, c string)` instead of `foo(a, b int, c string)` - Lots of fixes and optimizations in the hashmap. - Lots of missing checks in the type checker were added (for example, checking the correct usage of public struct fields). - Mutability bug fixes - Taking the address of a map value is no longer allowed, like in Go. - Matrix multiplication. - A new `#pkgconfig` flag to provide platform independent way to get compilation flags for C libraries/packages. - Explicit parentheses requirement in complex boolean expressions. - `println` was made even smarter, and can now handle complex types. - Precompiled text templates can now be used outside of vweb via `$tmpl()`. - Gitly, a big web application written in vweb has been released: https://github.com/vlang/gitly - `['/:arg1/:arg2/action']` vweb action attribute for easily getting query parameters assigned to method arguments. - Improved performance of text rendering, `gg.text_width()`. - Webview module in V UI. - Binary enum flags. - `[export]` attribute to change exported function name (for example for calling from a C library). - `unsafe` fixes and improvements. - Improvements to rand: `rand.ulid()`, `rand.uuid()`, a unified customizable PRNG API. - Hundreds of other fixes, features, and tests (from now on the changelog will be updated right away as the feature/bug fix lands). ## V 0.1.27 *5 May 2020* - vfmt has been re-written from scratch using the new AST parser. It's much faster, cleaner, and can format files with compilation errors. - `strconv`, `sprintf`, and `printf` in native V, without any libc calls. - Interfaces are now a lot more stable and have all expected features. - Lots of x64 backend improvements: function calls, if expressions, for loops, local variables. - `map()` and `filter()` methods can now be chained. - New `[]int{cap:cap, len:len}` syntax for initializing array length and capacity. - New `is` keyword for checking the type of sum types and interfaces. - `as` can now be used to cast interfaces and sum types. - Profiling with `-profile`. Prints a nice table with details about every single function call: number of calls, average time per call, total time per function - `import(xxx)` syntax has been removed in favor of `import xxx` for simplicity and greppability. - Lots of fixes and improvements in the type checker. - `time.StopWatch` - `dl` module for dynamic loading. - Automatic `str()` method generation for every single type, including all arrays. - Short struct initialization syntax for imitating named function args: `foo(bar:0, baz:1)`. - New operator `!in`. - Performance improvements in critical parts of the builtin data structures (array, map). - High order functions improvements (functions can now be returned etc). - Anonymous functions that can be defined inside other functions. - Built-in JSON module is back. - Closures. - Lots and lots of new tests added, including output tests that test error messages. - Multiple errors are now printed, the compiler no longer stops after the first error. - The new JS backend using the AST parser (almost complete). - Variadic functions. - `net.websocket` module (early stage). - `vlib` is now memory leak free, lots of `autofree` improvements. - Simplified and cleaned up `cmd/v`, `v.builder`. - V UI was updated to work with the new backend. ## V 0.1.25 *1 Apr 2020* - The entire compiler has been re-written with an AST parser. The code is now a lot cleaner and more maintainable. ~15k lines of old compiler code were removed. ## V 0.1.24 *31 Dec 2019* - A new parser/generator built on top of an AST that simplifies code greatly and allows to implement new backends much faster. - Sum types (`type Expr = IfExpr | MatchExpr | IntegerLiteral`). - B-tree map (sped up the V compiler by ~10%). - `v fmt -w`. - The entire code base has been formatted with vfmt. - Generic structs. - SDL module. - Arrays of pointers. - os: `is_link()`, `is_dir()`, `exists()`. - Ranging through fixed size arrays. - Lots of fixes in ORM and vweb. - The first tutorial: [building a simple web application with vweb](https://github.com/vlang/v/blob/master/tutorials/building-a-simple-web-blog-with-vweb.md) - Match expressions now must be exhaustive. - freestanding: `malloc()`/`free()`. - `++` is now required instead of `+= 1` for consistency. - Interpolated strings now allow function calls: `println('val = $get_val()')`. - `string.replace_each([])` for an efficient replacement of multiple values. - More utf8 helper functions. - `-prealloc` option for block allocations. - `type` aliases. - Running `v` with an unknown command will result in an error. - `atof` implementation in pure V. - Enums can now have negative values. - New `filepath` module. - `math.factorial`. - `ftp` module. - New syntax for casting: `val as Type`. - Fewer libc functions used (soon V will have no dependency on libc). ## V 0.1.23 *30 Nov 2019* - [Direct x64 machine code generation](https://github.com/vlang/v/issues/2849). Hello world being built in 3 milliseconds. - Bare metal support via the `-freestanding` flag, to build programs without linking to libc. - Prebuilt V packages for Linux, macOS, and Windows. - `string.index()` now returns `?int` instead of `int/-1`. - Lots of fixes in Generics. - vweb framework for developing web applications is back. - Vorum, the forum/blogging software written in vweb, can now be compiled and has been added to CI. - REPL, `v up` have been split up into separate applications to keep the core V compiler small. - V now enforces short enum syntax (`.green` instead of `Color.green`) when it's enough. - V UI for macOS. - Interfaces have been rewritten. `[]interface` support. - `os.cp()` for copying files and directores. - Additional compile-time flags: `$if clang, msvc, mingw, x32, x64, big_endian, little_endian {`. - All C functions now have to be declared, all missing C functions have been defined. - Global variables (only with the `--enable-globals` flag) for low level applications like kernels and drivers. - Nothing can be cast to bool (previously code like `if bool(1) {` worked). - `<<` and `>>` now work with all integer types. - V detects Cygwin and shows an error (V supports Windows natively). - Improved type checking of some operators (`%, |, &` etc). - Windows 7 support. - `println(true)` now prints `true` instead of `1`. - `os.exec()` now uses `CreateProcess` on Windows. - fast.vlang.io website for monitoring the performance of V after every commit. - On Windows Visual Studio is now used automatically if GCC is not installed. - vfmt! - Lots of cleaning up in the compiler code. - Multi-level pointers in unsafe code (`****int`). - MSVC backtrace. - `$if os {` blocks are now skipped on a different OS. - C string literals (`c'hello'`). - AlpineLinux/musl fixes + added to CI. - Inline assembly. - Clipboard module (Windows, macOS, X). - `foo()?` syntax for error propagation. - Docs have been migrated from HTML to `doc/docs.md`. - `eventbus` module. - Haiku OS support. - `malloc/free` on bare metal. - `utf8` helper functions (`to_lower()`, `to_upper()`, etc). - Optimization of `for c in str {`. - `string/array.left/right/slice/substr` were removed (use `[a..b]` slicing syntax instead). ## V 0.1.22 *28 Oct 2019* - Generic functions (`fn foo(bar T) T {`) with varargs support. - `array[start..end]` and `string[start..end]` slicing syntax. - Optimized `array.filter()` and `array.map()`. - `sqlite` module. - Cached modules for faster compilation. - Dramatic compilation optimizations: [V now compiles itself in 0.10 - 0.30 seconds](https://github.com/vlang/v/wiki/The-V-language-now-compiles-itself-in-0.09-seconds) - V scripts (simpler and cross-platform alternative to Bash). - Infinite multi-dimensional arrays (`[][][]int`). - `unsafe`. - `[deprecated]` attribute. - `[if]` function attributes for compile time function exclusion for performance. - `switch` has been completely removed from the language and replaced by `match` everywhere. - `pub struct` and `pub const`, previously all structs and consts were public by default. - `musl` support (V can now run on, for example, Alpine Linux). - Module header generation. V now supports closed source modules, which are still used in some industries. - Constants were added to typo suggestions. - `color in [.green, .red, .blue]` now works without specifying `Color.green`. - V compiler is now a module that can be used by other programs. - Backtraces now have source lines on Linux. - `runtime.nr_cpus()`. - `fn init()` for module initialization. - `a in [1, 2, 3]` optimization: no array gets allocated. - Raw strings: `s := r'hello\nworld'`. - `if a := func() { }` syntax for handling optionals. - f32/f64 comparison now uses machine epsilon by default. ## V 0.1.21 *30 Sep 2019* - `none` keyword for optionals. - Solaris support. - All table lookup functions now use `none`. - varargs: `fn foo(bar int, params ...string) {`. - Double quotes (`"`) can now also be used to denote strings. - GitHub Actions CI in addition to Travis. - `-compress` option. The V binary built with `-compress` is only ~90 KB! - More memory management. - Unused modules result in an error. - "Unused variable/module" errors are now warnings in non-production builds. - Duplicate methods with the same name can no longer be defined. - Struct names must be capitalized, variable/function names must use snake_case. - Error messages are now even nicer! - Lots of fixes in automatic `.str()` method generation for structs and arrays. - ~30% faster parser (files are no longer parsed separately for each pass). - `_` is no longer a variable, but an actual syntax construct to skip unused values, like in Go. - Multiple returns (`fn foo() (int, string) {`). - `!` can now only be used with booleans. ## V 0.1.20 *17 Sep 2019* - JavaScript backend! - Hundreds of C warnings were fixed. `gcc v.c` now builds without any warnings. - The mutability check now applies to function args (mutable receivers that are not modified result in a compilation error). - V tests now show how long each test took. - Official Android support (only console applications via Termux for now). - Typo check. If a variable/function/module etc is misspelled, V will suggest the correct name. - Lots of Microsoft C fixes, and a separate Travis instance for this backend. - Bitwise operators `|`, `^`, `&` no longer work with booleans. ## V 0.1.19 *12 Sep 2019* - Lots of refactoring, simplifications, and optimizations in the compiler. - Experimental memory management at compilation (only for the V compiler itself for now). - Lots of ORM fixes. - Functions can now be inlined via the `[inline]` attribute. - New `mysql` module. - Better error format that is supported by all major editors (go to error). - Error messages now point to the actual place where the error happened. - Custom json field names: `struct User { last_name string [json:lastName] }`. - Raw json fields via the `[raw]` attribute. - All C code was removed from the `freetype` module. - `gg` module can now render all Unicode characters. - `[typedef]` attribute for imported C struct typedefs. - Support of Objective C interfaces (primarily for using Cocoa). - REPL: clear command and custom functions. - REPL tests (which are also used for testing certain compiler errors). - Syntax bug fixed: `foo[0] += 10` is now possible. - http: support plain HTTP protocol and follow redirects. - http: header data is now processed correctly. - net: basic UDP support. - `import const` was removed from the language. - `array.contains()` was removed from the language (`in` should be used instead). - `[0; len]` syntax was removed (replaced with a simpler `[0].repeat(len)`) - Primitive aliases were removed to simplify the language. - GitHub supports V now! - Backtraces are now printed on panics. - A new awesome `readline` module. - V.c is now regenerated automatically after every commit. - A bug with struct ordering was fixed, now structs can be declared in any order. - V modules can now be built with `v build module`. - `@FILE, @LINE, @FN, @COLUMN` for debugging. ## V 0.1.18 *16 Aug 2019* - Built-in ORM (`uk_customers = db.select from Customer where country == 'uk' && nr_orders > 0`). - Map initialization syntax: `m := { ‘foo’: ‘bar’, ‘baz’: ‘foo’ }`. - `map.delete(key)`. - `libcurl` dependency was removed from the `http` module. - All function arguments are now immutable by default (previously they could be modifed inside the function). - `http` functions now return optionals. - `sync.WaitGroup`. - `vweb` static files serving. - `crypto.rand` module. - `v up` to update V. - SChannel support on Windows. - `net.urllib` module. - vpm package manager, `v install`. - `()` are now required in complex bool expressions: `(a && b) || c` instead of `a && b || c`. - All arrays now have a default `.str()` method. - Bootstrapping V with MSVC. - Experimental `≠` etc support. - `encoding.csv` module. - `$if debug {` for running code in debug mode only. - Map struct fields are now initialized automatically, just like arrays. - Maps now support array values. - `json` functions can no longer be used if the `json` module is not imported. ## V 0.1.17 *29 Jul 2019* - `vweb` module for developing web apps in V. - vtalk, open source V forum software. - Generics (very limited right now, but they will be gradually improved). - Comptime codegen (`foo.$method()` where `method` is a string). - @ for escaping keywords (e.g. `struct Foo { @type string }`). - Windows Unicode fixes (V can now work with non-ASCII paths etc on Windows). - Fix mutable args bugs + don't allow primitive arguments to be modified. - Declaring a mutable variable and never modifying it results in a compilation error. - Interactive debugging support. - `sync` module for Windows. - `#!` support on Unix systems (V scripts). - Lots of Visual Studio fixes. - `crypto.aes` and `crypto.rc4` modules. - Internal modules. ## V 0.1.16 *23 Jul 2019* - V can now be used with Visual Studio! - Hot code reloading now works with graphical applications (e.g. graph.v, bounce.v). - Compile time memory management for arrays. - High order functions. - `match` expression (replacing `switch`). - Import cycle detection. - `crypto/md5`, `crypto/sha256`, and `crypro/sha512` modules. - `os.executable()` - a cross platform function that returns full path to current executable. - `~/.vlang` and `VROOT` were removed entirely. The installation is a lot cleaner now. - V can now be packaged for all Linux distros. - Arch Linux package. - `string(bytes_buffer, len)`, `string(bytes_array)` casts. - Multiple `defer`s. - `key in map` syntax (replacing `map.exists(key)`). ## V 0.1.15 *15 Jul 2019* - FreeBSD, OpenBSD, NetBSD, DragonFly support. - Hot reloading now works with graphical applications: [bounce.v](examples/hot_reload/bounce.v) - VROOT was removed, the installation process is now much simpler. - `defer` statement. - map.v was re-written. It's now much faster. - `for key, val in map` syntax. - `flag` module for parsing command line arguments. - `zip` module. - `crypto/sha1` module. - Submodules and module aliases (`import encoding.base64 as b64`). ## V 0.1.14 *12 Jul 2019* - `gg` module Windows support, V Tetris runs on Windows. - Compile `glad` and `cJSON` only once. Programs using `gg` or `json` compile a bit faster. - `v.c` has been cleaned up and minimized (~16k => ~10k lines of code). - `type` aliases can now have methods. - Const overflow check during compilation (`byte(1000)` will no longer compile). ## V 0.1.13 *10 Jul 2019* - New enum syntax (`token == .name`), enum values are no longer global consts. - Submodules (`import encoding.base64`). - Hot code reloading. - Special `err` variable for getting error values. - Complex numbers. - `<<` can now append arrays (`numbers << [1, 2, 3]`). - Lots of Windows fixes (Windows still needs some work). - Lots of REPL improvements (e.g. `>> 2 + 3` works now, no `println` required). - The website was made easily translatable, it's now partially available in several languages. ## V 0.1.12 *4 Jul 2019* - V can finally compile itself on Windows (https://github.com/vlang/v#mingw-w64). - `os` module now uses optionals in all functions that return `File`. - Lots of bugs with optionals were fixed. - `println` was optimized. It no longer results in allocations. Now it also works correctly with all integer types. - Lots of `vfmt` fixes, it will be enabled tomorrow. - New `strings` module. - Lots of other fixes and improvements, thanks to all the contributors. ## V 0.1.11 *1 Jul 2019* - Cross compilation for Windows! - Lots of Windows fixes. - socket.v. - maps fixed. ## V 0.1.9 - 0.1.10 *29 Jun 2019* - Windows support via MinGW-w64. Pre-built Windows binary. - File structure has been simplified: all vlib modules were moved to the vlib/ directory, makefile was moved to the root. - One single archive with pre-built binaries for all operating systems. - `mut var := val` was fixed (previously `mut var = val` was allowed as well). ## V 0.1.8 *28 Jun 2019* - Single file programs without `fn main` now work as expected. - REPL has been fixed: it now supports imports, consts, function definitions, etc. ## V 0.1.7 *27 Jun 2019* - All C code in the compiler and vlib has been replaced with V. - `#` syntax for embedding C code has been removed. - Exported functions now need to be marked with `pub`, all public vlib functions have been updated. - CI has been set up (Travis + Azure). On every commit and PR it is made sure that V can compile itself, all tests pass, and all examples compile. - More tests have been uploaded. - Cleaner bytes to string conversion: `tos2(bytes)` => `string(bytes)`. - The home page has 3 more examples next to 'hello world' that show the features of the language. - Lots of bugs and issues fixed.