vlang/v 0.4.4 on GitHub

V 0.4.4

9 January 2024

Improvements in the language

Implement @[aligned] and @[aligned:8] attributes for structs and unions (#19915)
Update attributes to use new syntax
Update remaining deprecated attr syntax (#19908)
Support $if T is $array_dynamic { and $if T is $array_fixed { in addition to $if T is $array { (#19882)
Prepare for making -W impure-v the default (#19940)
Assigning 0 to reference fields now requires unsafe blocks (fix #14911) (#19955)
Unwrap const() blocks
Implement $for comptime T.variants (#20193)
Add r and R switches for repeating in string interpolation, '${"abc":3r}' == 'abcabcabc' (#20197)
Comptime refactor and cleanup (#20196)
Allow comptime-for to iterate over comptime variables, add $string comptime type, cleanup (#20233)
Unwrap an option value automatically, inside if o != none { (#20275)
Complete support for smartcasting to a comptime variable type (#20270)
Improve comptime var checking with is operator and smartcasting (#20315)

Breaking changes

none

Checker improvements/fixes

Disallow $for i in struct.values and $for i in enum.fields (#19845)
Parser, checker: fix var scope in lambda(fix #19860) (#19871)
Change the warning more than 1000 possibilities in match range to a notice (#19862)
Fix inability to use multiple import some modname as _ in the same .v file (fix #19899) (#19900)
Disallow casting strings to pointers outside unsafe (#19977)
Disallow directly indexing sumtype and interface, when using as parameters(fix #19811) (#19982)
Fix loop on aggregates of arrays (in match branches) of sumtypes (fix #18548) (#19988)
Disallow indexing mut struct, passed as a fn parameter (#19992)
Enhance err msg for unknown types for comptime $for (#20057)
Fix .clone()/.move() with shared maps (#20083)
Fix generics method call with struct short syntax args(fix #20030) (#20100)
Fix unwrap, when generic structs are used as arguments, in uncalled methods (fix #20132) (#20135)
Fix generic fn with generic fn call returning generic map (fix #20106) (#20150)
Cast sumtype to its variant generic type (#20166)
Refactor string to enum error check, handle EnumName(string_variable) too (#20210)
Fix generic array method call with multi-types (#20237)
Remove unnecessary struct ref field initialization checks and notifications at map initializing(fix #20245) (#20251)
Add a notice, for accessing by key, map values, that contain pointers (to use unsafe or an or {} block) (#20266)
Fix mismatch checking when a function returns sumtype as an argument (fix #19325) (#20264)
Fix and cleanup uninitialized checks for array initialisers with len: (fix #20272) (#20279)
Give an error for .free() method calls, when used on fixed arrays (#20320)
Fix type mismatch checking for assignments with generics (fix #20298) (#20327)
Fix too strict checking with generics in assignment type mismatch (fix #20335) (#20346)
Disallow string to voidptr cast entirely (#20351)
Fix generic method calls with multi generic types (fix #20330) (#20360)

Parser improvements

parser: fix parsing comments after new attribute syntax
parser: fix failures found with fuzzing (#19873)
parser: deprecate old attribute syntax & update remaining (missed) attributes (#19879)
parser: fix infix expr handling with cast on left side of << operator (#19985)
ast: fix generic structs with multiple levels of generic embedding (#20042)
parser: implement thread returns result and multi_returns (fix #19281) (#20194)
parser: fix formatting struct decl with comments (#20207)
parser: fix formatting enum and interface decl with comments (#20216)
parser: fix fn call with newline opening brace (fix #20258) (#20267)
parser: fix parse_vet_file() with vfmt off/on flag (#20273)

Compiler internals

scanner: implement support for UTF-32 escape codes in string literals (#19911)
scanner: add new_silent_scanner/0, Scanner.prepare_for_new_text/1, make .ident_char/0, .ident_string/0 and .text_scan/0 public (#20045)
pref: support VNORUN=1, to enable running of tests, vsh files etc (i.e. just compile them, for debugging later)
scanner: fix backslashes followed directly by newline in string literals (fix #20291) (#20296)
scanner: fix escape character handling in character/rune literals (fix #20301) (#20304)
pref: disable the -macosx_version_min clang flag by default (#20297)
builder: remove passing -fno-strict-aliasing, for -prod to gcc/icc (#20368)
markused: add -skip-unused for programs that import x.vweb too (do not skip unused routing methods)

Standard library

json: fix recursive pointer encoding (#19840)
os,picohttpparser,sokol,strconv: prepare for making -W impure-v the default (#19846)
os: add fast path to mkdir_all, when the given folder already exists (#19869)
os: ignore empty path segments in join_path (#19877)
os: fix bootstrapping for OpenBSD
x.json2: replace deprecated type byte with u8 in the tests (#19909)
vlib: change byte to u8 (#19930)
sync: add a FreeBSD specific version of vlib/sync/sync_default.c.v (#19962)
datatypes: add push_many for doubly and singly linked list + add insert_many for heap (#19975)
datatypes: make Direction pub and fix and add tests for push_many (#19983)
gg: fn (data voidptr, e &Event) for events, allows methods
vlib: add a compress.szip module, deprecate the szip one after 2023-12-31 (#20003)
os: create the folder described by XDG_CACHE_HOME, if it is non empty, and it does not exist yet, when calling os.cache_dir() (#20046)
vlib: use the builtin flush functions, instead of the C. ones (#20108)
crypto: add blake2s and blake2b hashes (#20149)
os: fix mv_by_cp for directories (#20154)
os: update mv fns, improve performance, add params struct to control overwrite behavior (#20156)
gg: fix overlapping slices in draw_slice_filled() (#20182)
json: fix option sumtype handling (#20186)
builtin: add @[direct_array_access] to js string trim_right method (#20222)
json2: add encoder support for time.Time (#20228)
json2: fix encoding of 💀🐈 etc emojis (fix #20243) (#20247)
json2: make public the generic function map_from/1 (#20294)
json2: optimise encoding to be faster than cJSON with -prod (#20052)
json2: support sumtype encoding in a more robust way (#20093)
json2: strict module (#17927)
crypto: fix notices/errors for v -N test vlib/crypto
crypto: add blake3 hash (#20319)
sokol: fix compiling gg and other graphical examples on OpenBSD (#20333)
csv: Add a sequential reader too (suitable for very large .csv files, it does not read everything at once) (#20140)

Web

net.mbedtls: use char and usize types for describing more precisely the C API of mbedtls (#19837)
vweb: add the mime type for .toml files (#19875)
net.openssl: use actual C values for the SSLError enum (#19945)
vweb: .html('custom_template.html')
vweb: add an optional parameter to the .redirect/2 method, to be able to set the http code for the redirects (#20082)
x.vweb: fix large payload (#20155)
x.vweb: reimplement csrf module (#20160)
net: make net.fionbio and net.msg_nosignal constants public in net_windows.c.v (#20183)
net.http: remove unused read_set_cookies function (#20187)
os, net.http.file: add a folder listing to the http static file server, started by file.serve/1 (#20192)
websocket: enable using an already existing connection (from vweb or another http server) (#20103)
x.vweb: fix fsanitize-address test for SSE, improve documentation on the usage of takeover_conn (#20249)
net.http: support -d no_vschannel on windows, to fix long waits, while connecting on some systems (#20265)
x.vweb: fix $vweb.html() integration in cgen for the newer x.vweb module (fix #20204)
net: support only ip and ip6 in net.tcp_listener (#20336)
x.vweb.assets: reimplement assets module for x.vweb (#20280)
x.vweb.sse: reimplement SSE module for x.vweb (#20203)
js.dom: add querySelector[All] and NodeList (#20240)

ORM

orm: fix code generation for an option time.Time field (#20031)
orm: fix the generated SQL for the "not equal" operator (#20321)

Database drivers

db.mysql: add support for the FreeBSD name of the mariadb client library (#20039)
db.pg: fix using postgresql on windows, improve instructions for installing it (#20053)
db.mysql: add ability to prepare and execute statements separately (#20146)
db.pg: fix compilation error with the msvc compiler on windows, and add readme (#20326)

Native backend

C backend

Fix generic fn returning fixed array (#19885)
Fix arrays alias built-in methods call(fix #19896) (#19910)
Fix generic array initialization (fix #19903) (#19916)
Fix option sumtype auto deref (#19919)
Ast, checker, cgen: fix interface embeded methods call(fix #16496) (#19936)
Fix ref and deref when an interface is used as a function parameter (fix #19947) (#19966)
Fix auto str for interface struct member which implements str method (#19970)
Fix generics call with interface arg (fix #19976) (#20002)
Fix lambda initialization on option struct field (fix #19474) (#19995)
Fix live mode on windows (#20041)
Fix the static from_string method of Enum across mods(fix #20050) (#20068)
Fix @[if xyz?] fn init() {}, add tests (#20096)
Fix assignment to the elements of an array of fixed arrays (#20133)
Fix mutable comptimeselector usage (fix #20027) (#20134)
Fix generics chans select (#20159)
Fix string interp with zero characters (fix #20199) (#20200)
Fix interface eq method with option and ref (fix #19441) (#20201)
Fix infix expr in method of mut receiver variable (#20225)
Fix cgen for thread wrappers, when spawning fns with with anon-fn array args and mut interfaces (fix #19425) (#20241)
Fix fixed array return when returning fixed array initialization (#20262)
Fix function generated code, when returning from match (#20263)
Fix in expression with mut and ref (fix #20268) (#20271)
Fix initialization of const string arrays on msvc (fix #20287) (#20289)
Fix code generation when 'in array init' is used as an if condition (fix #20300) (#20302)
Escape table names (fix #20313) (#20322)
Add missing clear method for generic maps (#20340)
Fix auto unwrapping option fn type (#20332)
Fix option initialization with default struct initialization to not be none (#20349)
Fix auto str for arr options with possible circular reference (#20354)
Fix code generation when the function returns mut fixed array (fix #20366) (#20367)

vfmt

vfmt: automate transition from the old [attribute] to the new @[attribute] syntax (#19912)
vfmt: remove empty __global() (#20004)

Tools

tools: fix already installed detection when running v install --once without args (#19838)
compress.gzip: change the endianness for validation to conform to the gzip file specification (fix #19839) (#19849)
tools: support v doc -run-examples math, to ensure that all // Example: code doc comments are working (#19852)
Fix v help in the prebuilt v executables from the zips in the releases
ci,tools: remove skips for the wasm backend, since binaryen is not required anymore (#19883)
tools.vpm: support again http installs, when installing from an url (workaround) (#19914)
tools.vpm: improve version detection of installed modules (#19933)
tools: fix v up, by not deleting ./v when missing a .git folder (#19965)
tools.vpm: fix installing of modules with conflicting names, extend tests (#19961)
tools.vpm: evaluate dependencies earlier to fix potential recursive install loop (#19987)
tools.vpm: add support for ssh and hg version installations (#20125)
tools: simplify and remove redundancies in vshader.v (#20161)
ci: add new workflow, for doing the slower tests in vpm specifically with -d network (#20177)
tools.vpm: improve detection of already parsed modules (#20223)
scanner: change -d debugscanner to -d trace_scanner for uniformity with the other tracing options, described in CONTRIBUTING.md
v.pref: support a -n option, silencing only notices (#20331)
ci: add vsql to v_apps_and_modules_compile_ci.yml too (#20341)
ci: fix the workflow for Vinix, using the rules in its own .yml file (#20371)
Support -? as alias to -help (implement #20355) (#20358)
vdoc: filter testdata and tests folders by default, reduce filesystem stats calls

Operating System support

os: small cleanup in the FreeBSD branch of os.executable/0: use fixed array for the sysctl params, instead of allocating a dynamic one (#20353)
os: improve os.executable() on OpenBSD (#20356)
v.util.diff: support OpenBSD's default diff tool (#20369)
os: fix os.open_file/3 wb mode creation of text files containing crlf on Windows (#20101)
os: fix File.tell for files > 2GB on windows, by using C._telli64(f.fd) (#20072)

Examples

encoding.xml: make functions public, add documentation, tests, fix attribute parsing for self-closing tags (#19901)
examples: show how to turn on CORS in a vweb server app
examples: serve the wasm mandelbrot project using a v web server (#19937)
examples: increase the resolution of the generated image in examples/wasm/mandelbrot
docs: update null convention in ORM example, since @[nonull] is no longer needed (#20286)
docs: add an example of a nullable ORM field (#20292)
example: add a path finding algorithm visualizer using gg (#20060)
examples: add an even smaller gg usage example, demonstrating how to always show the builtin fps counter, and how to avoid importing gx