0.4.1

V 0.4.1

3 September 2023

Improvements in the language

• Pure array.sorted() and array.sorted_with_compare() methods, that do not modify their receivers (#19251)
• UB overflow has been removed
• Implement Enum.from_string(name string) for converting strings to enum values (#19156)
• Disallow casting string to enum, suggest using Enum.from_string() instead (#19260)
• Use autocasting in complex conditions (#18839)
• Allow alias as fixed array on return (#18817)
• Do not allow uninitialized function pointers
• Fix compiling V programs with latest clang 16 on windows (clang 16 is stricter than clang 14) (#19095)
• Fix anonymous struct with default expr (#19257)
• Allow using consts as enum values (#19193)
• @[attr] syntax to replace [attr] ([] is used for too many things). Most likely to be replaced with @attr() in the future.
• Allow none for not first values on map initialization (#18821)
• Make all .trace() methods generic on the type of the passed expression

Breaking changes

• arr[1..4] now requires unsafe if the slice can modify the original immutable array.

Checker improvements/fixes

• Disallow assigning nil to struct fields (#18725)
• Use autocasting in complex if conditions (#18753)
• Disallow invalid prefix on left side of assign stmt (#18750)
• Allow no return in compile_error else block (#18758)
• Fix interface param resolution (#18780)
• Add an error for $tmpl function type mismatches (#18826)
• Disallow voidptr cast to struct (#18845)
• Fix type checker on auto deref var (#18842)
• Check generic sumtype declaration (fix #18741) (#18865)
• Fix closure with inherited sumtype variable (#18894)
• "v -line-info" for a quick run to fetch info about objects on one line
• Make sure vweb actions return vweb.Result
• Do not allow modifying immutable vars via arrays with refs
• Support @struct in static methods
• Fix generic struct field init recursively (related #19014) (#19025)
• Fix struct field fntype value call (#19067)
• Explicitly disallow creating type aliases of none, i.e. type Abc = none (#19078)
• Fix assigning an array slice (fix #19120) (#19137)
• Fix assigning array slice in struct init (#19150)
• Check enum static from_string arguments errors (#19163)
• Disallow taking the address of consts with int literal values (#19160)
• Check struct embed with wrong position (#19245)
• Optimize out needless string interpolations from the most common case in Checker.expr_or_block_err
• Check error for or_expr inside infix expression (#19213)
• Disallow thread as var name (#19174)
• Check error for sumtype in array (#19183)
• Disallow an empty chan type (#19167)

Parser improvements

• Change warn to error, for const names with upper letter (fix #18838) (#18840)
• Disallow declaring static functions as method receivers (#19007)
• Disallow having builtin type as type names for enum, sum type and alias (#19043)
• Support const x := 123, to make extracting locals as constants less annoying while prototyping
• Fix struct field fn type with default value (fix #19099) (#19106)
• Fix for i++; i<10; i++ { (fix #18445) (#19035)
• Fix fn return alias of fixed array (#19116)
• Fix generic struct init (Stack[&Person]{}) (fix #19119) (#19122)

Compiler internals

• pref: make -autofree work without -gc none
• builder,pref: allow thirdparty objects compilation with CPP compiler (#19124)
• scanner: fix string interpolation with nested string interpolation in inner quotes p. 3 (#19121)
• scanner: error early on an unsupported escape sequence in a string, like \_ (fix #19131) (#19134)
• v.token: add inline next_to() and cleanup related calls (#19226)

Standard library

• eventbus: add generic support for event name (#18805)
• readline: add support for ctlr+w and ctrl+u shortcuts (#18921)
• strconv.atoi: fix string.int() returning numbers for non number characters (fix #18875) (#18925)
• builtin: reduce the number of array allocations for consts in all V programs (#18889)
• builtin: move array.data to the top of the struct
• os.notify: implement the kqueue backend for notify.FdNotifier (#19057)
• vlib: add a new module builtin.wchar, to ease dealing with C APIs that accept wchar_t* (#18794)
• arrays: add more util functions and tests for them - find_first, find_last, join_to_string (#18784)
• vlib: use sync.new_mutex() consistently for initialising all vlib structures containing mutex fields
• crypto.pem: add a static method Block.new, to replace new (#18846)
• crypto.pem: add decode_only and general improvements to decoding (#18908)
• log: improve the most common use case, it's no longer necessary to create a Log instance (#19242)
• crypto.sha512: make the new384/0, new512_256/0, new512_224/0 functions public
• json: fix option alias support (#18801)
• time: fix parse_format with YY (#18887)
• math.big: allow bitwise ops on negative signum (#18912)
• math.big: make is_odd public and add test cases (#18916)
• math.big: add checked division methods (#18924)
• math.big: add isqrt_checked and standardize error format (#18939)
• sokol: use GLCORE33 on linux
• os,term.termios: add termios.set_state/2, state.disable_echo/0, use them in os.input_password, to fix v -os wasm32_emscripten examples/2048/
• gg: implement Android specific APK asset loading for the create_image function (#19015)
• sync: make sync.Direction public (#19047)
• time: store time with nanosecond resolution in time.Time, deprecate Time.microsecond, add utility methods and tests (#19062)
• time: add a format_rfc3339_nano() method to time.Time
• time: add 'i', 'ii' in custom_format() for 12-hours clock(0-12-1-11) (#19083)
• gg: expand the -d show_fps background, so fps>100 will not overflow it
• Math.big: restore gdc_euclid, use it for smaller numbers, fix bench_euclid.v .
• Add new generic arrays.uniq, arrays.uniq_only, arrays.uniq_only_repeated, arrays.uniq_all_repeated, arrays.distinct
• builtin: add support for -d bultin_writeln_should_write_at_once and -d bultin_write_buf_to_fd_should_use_c_write (#19243)
• builtin: always show the assert message, if it was defined in the source, in non test programs too (fix #19240)
• time: check if a day is a valid day of its month (#19232)
• toml: Add generic automatic decoding and encoding of simple structs, when they don't implement custom methods (#17970)

Web

• http: Request.host
• net.ftp: fix dir() for file names, which contain spaces (fix #18800) (#18804)
• net.http: make listener public, and add addr in Server struct (#18871)
• net.http.chunked: return !string on decode (#18928)
• net.conv: rename functions to match other langs, making them easier t… (#18937)
• wasm: remove dependency on thirdparty/binaryen, webassembly backend rewrite (#18120)
• wasm: add a -wasm-stack-top flag to compiler (#19157)
• net.mbedtls: add SSLListener to allow creating SSL servers (#19022)
• picoev, picohttparser: reimplement in V (#18506)
• vweb: fix parsing of form fields, send with multipart/form-data (by JS fetch)
• vweb: make vweb route paths case sensitive (#18973)
• net.mbedtls: have shutdown close accepted connections too (#19164)
• http: add support for stream connections, and custom .on_redirect, .on_progress, .on_finish callbacks to http.fetch() (#19184)
• vweb: add a user_agent utility method to the vweb context (#19204)
• vweb: avoid the controllers having to be defined in specific order (#19182)

ORM

• orm: fix inserting sequential values (id=0), in tables with an i64 primary field (#18791)
• Add OR in where on update and delete (#19172)

Database drivers

• vlib: remove deprecated pg, mysql, sqlite, mssql modules. Leave only the db. prefixed db.pg, db.mysql etc
• db.mysql: add the exec family of methods (#19132)
• db.sqlite: add exec_param_many and exec_param methods (#19071)
• db.sqlite: make functions return results, breaking change (#19093)

Native backend

• native: move functions out of amd64.v (#18857)

C backend

• Fix selector code to use interface method table on closure when needed (#18736)
• Fix nested or expr call (fix #18803) (#18807)
• Ensure that << and >> has higher precedence in the generated C code, than arithmetic operations (diff between C and V precedences) (#18814)
• Fix cross assign with aliased array (#18830)
• Fix generated code for returning generic result/option to comptime var (#18834)
• Fix option map with fn type value (#18849)
• Fix returning an option tuple - fn f() ?(int,int) { return g() } (#18851)
• Fix printing multiple fixed array (fix #18866) (#18879)
• Fix infix expr with number overflow (fix #18905) (#18936)
• Remove \r for consistency (#18962)
• Allow dump(unsafe{nil}) and dump(voidptr(123)) in the same program
• Implement fixed array of threads wait() (#19032)
• Fix an error with ptr interpolation (fix #19048) (#19049)
• Fix spawn call fn struct field(fix #18862) (#19096)
• Fix bootstrapping on older macOS Catalina
• Fix alias of array method call(fix #19125) (#19129)
• Simplifications and clean up.
• Fix mixed fixed array and array initializing (#19246)
• Fix array sort with fn call parameter (fix #19220) (#19221)
• Fix generic struct with option fn field (#19218)
• Fix comptime assign with generic result return type (#19192)
• Fix match with comptime if expr in branch (#19189)

Tools

• ci: add v-analyzer builds (#18835)
• ci: cleanup more the contents of the generated v_linux.zip, v_macos.zip, and v_windows.zip, use -skip-unused
• tools: fix vcomplete for zsh (#18950)
• tools: support a toc for projects, with single exposing module, in v doc (#19001)
• Add support for v should-compile-all -c examples/, which will delete all the produced executables at the end
• vgret: add install commands for ubuntu and arch to doc string (#19247)
• fast.v: add favicon to the html produced by fast.v
• vpm: implement multithreading (#19208)
• Make performance_compare.v more robust and easier to use, by allowing v run cmd/tools/performance_compare.v too
• Improve oldv windows support, make it use -municode for windows builds, make it support cmd.exe
• Make repeated runs of oldv SAME_COMMIT -c "./v file.v", not use the network at all
• Help: add link to the TESTS.md at the bottom of v help test, run CI checks on help markdown files as well
• v.builder: show the number of files, types, modules, when a program is compiled with -stats
• Improve the output of parser_speed.v and scanner_speed.v