Releases · vlang/v

V 0.3.4

30 Apr 2023

vweb now supports live page reloading. The web app is instantly updated in the browser (no need to refresh the page) everytime a .v or a .html file is changed.
vweb is now significantly faster and more stable under load, due to a new multithreaded worker pool, which is much more efficient at spreading the workload among all threads equally.
Middleware support in vweb.
vweb now supports controllers. It's now possible to have multiple app structs to better separate logic.
vweb: overridable .not_found() method for custom 404 pages.
A new pure WASM backend, based on binaryen, a WASM builtin module, and a pure V WASM serialization library.
Lots of playground improvements: play.vlang.io, including a really cool feature: "Show generated C code".
v share file.v for sharing code via the playground.
All ORM queries now return ![] (Result of an array). This allows to handle/propagate DB errors and simplifies working with ORM (one way).
Many ORM improvements: type checks for limit/offset/order by/where; support of reference objects in insert; struct fields can be used with limit/offset; Connection interface.
ORM now supports the like operator: users := sql db { select from User where name like 'Bob%' }.
A new -d trace_orm option to see all SQL queries generated and used by V ORM and -d trace_pg_error to trace PG errors.
A new command line flag -e for running short V programs on command line: v -e "println(2+5)" (works just like in Perl).
v up sped up for when it hasn't been run for a long time (vc/ bootstrapping has been optimized).
Lots of new checks in the checker.
Variable shadowing has been completely banned (previously variable names could conflict with module names).
If guards now work with struct fields which are Option functions. Such fields can now also be assigned to other fields/variables.
net.ssl: types using ssl contexts can now be converted to strings via .str()/printed via println().
v.reflection: type symbol info metadata has been added.
cgen: do not generate unused interface functions.
A new [spawn_stack: 131072] fn attribute for controlling the max size of the stack of the spawned threads.
Final steps in making the Option type a first class type.
Lots of documentation/readme improvements.
Option receivers can no longer have methods.
none can now be cast to all Option types, including aliases.
Enums can no longer be initialized like structs.
Builtin methods first/last/repeat can now be used in custom user types (previously they only worked in builtin arrays).
v init no longer overwrites existing src/main.v.
Anonymous fn params can no longer be shadowed.
Channel pop now works with an or block: ch := <-self.item or { return none }
Option references are now supported: ?&Type.
C++20 standard support in the C++ backend.
v self now uses a faster tcc backend on macOS/Apple Silicon, just like on Windows/Linux.
os.hostname() and os.loginname() now return Result.
The "Is V still fast?" web page has been sped up by splitting the results table into multiple years.
Allow foo := Foo{}, when Foo has an Option field, that is a struct, that has a [required] tag on its fields (#17516).
Comptime reflection now supports interface fields.
comptime: $option (for f in Foo.fields { $if f.typ is $option { ...).
comptime: compile-time enum evaluation with `$for
comptime: all types are now lowercase ($int, $enum, $option etc).
item in MyEnum.fields { dump(item.value) dump(item.name) }`.
Arrays of Options are now allowed.
it has been renamed to index in array inits.
datatypes.LinkedList[map] now works correctly.
crypto and math modules have been updated to use Result instead of Option.
[required] fields are now checked for embedded structs.
readline module now works much better on macOS: key navigation, history, etc (now on par with Linux).
Basic QNX support.
A new -ldflags option, in addition to -cflags. Works just like LDFLAGS in C.
urllib.Values.get() now returns an Option.
strconv: v_printf() was made private, v_sprintf() was deprecated. String interpolation should be used instead.
Fixed a bug with closures with fixed array variables.
Generic struct inits no longer need explicit types provided: struct Foo[T, U] { a T; b U } foo := Foo{a:2, b:'x'}
os.Process now has a create_no_window option (Windows only).
os.Process now has a set_work_folder() method to set the initial working folder of the new child process.
json: enums are serialized as strings by default, [json_as_number] attribute can be used for the old behavior.
net.http: mime types have been updated to include all official types.
gg: create_image() now returns !Image instead of Image, allowing to handle errors.
sokol: errors during image creation no longer result in a panic, but can be handled by the programmer.
sokol: macOS apps can now be quit using Cmd+Q.
A new termios module.
Lots of fixes and new features in the native backend, including making codegen logic platform-independent.
strconv.atoi optimizations.
println() now supports arrays with recursive references.
Multipart form parsing fixes in vweb.
A database pool in vweb.
termux: support for cross-compilation from termux to other platforms.
GitHub Copilot summaries in PRs.
unsafe: dereferencing nil references is no longer allowed.
os: fixed a memleak in getline().
Mixing multi-return results with other types in return statements is no longer allowed (this simplifies the code).
Assigning anonymous structs to named structs is no longer allowed.

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

V 0.3.4

Releases: vlang/v

weekly.2023.19

0.3.4

V 0.3.4

weekly.2023.17

weekly.2023.15

weekly.2023.14

weekly.2023.13

weekly.2023.12

weekly.2023.11

weekly.2023.10

weekly.2023.09