0.4.6

V 0.4.6

20 May 2024

Improvements in the language

• Experimental x.vweb is now veb, the official and recommended way to build web apps in V. Built on top of pico.v.
• autofree: -print_autofree_vars command line flag for printing variables autofree couldn't free
• Add @VMODHASH comptime variable to store the commit sha of a V module (#21091)
• Fix sumtype support for option variant types (#21101)
• Utilize new diff functions in errors (expected/found) (#21431)
• Add @[_linker_section] for global variables

Breaking changes

• checker: disallow initializing private struct fields outside structs module (#21183)
• vlib: update handling of imports whose symbols are not directly used in imported file, remove pub const is_used = 1 workarounds (#21160)
• net.ftp: allow to choose a different port than port 21 (change FTP.connect to accept host:port, not just a host address) (#21185)

Checker improvements/fixes

• Ambiguous expression notice for & << >>, similar to && ||
• Disallow using aliases of ?Type as !Type (#21128)
• Fix option checker arg validation for ptr passing on non expected ptr (#21087)
• Optimize option and result type check, add more typinfo to error details (#21105)
• Move error handling for any type to the checker to resolve parsing issues (#21146)
• Move error handling for user defined type duplicates to the checker to resolve parsing issues (#21147)
• Detect redundant ref when assigning call expr with ref return (#21141)
• Fix multi return using nil and voidptrfix (fix #17343) (#21144)
• Fix C struct embedded init fields checking (#21137)
• Remove resolved vfmt workaround and TODO (#21175)
• Move more match validation from the parser into the checker, add error for match without branches (#21181)
• Improve the error message for an unknown type (#21207)
• Allow passing none to fn f(arg ?&Type) { (fix #21213) (#21231)
• Fix -parallel-cc regression (part 1, workaround .filter(fn[c]) used in checker/orm.v) (#21238)
• Detect and error on unreachable code in loops, after continue and break statements (#21294)
• Disallow Result callbacks functions like map/filter/all/any (#21055)
• Fix missing check for or expr on string interpolation (#17566)
• Allow pass array as mut param to spawn fn (#21283)
• Turn array assign warning into error (#21341)
• Ignore last semicolon on or-expr (#21361)
• Disallow structs with @[params] attribute as mutable function parameters (#21206)
• Set auto Return pos correctly; cgen: autofree fix for optional returns
• Disallow invalid ptr operations (#21515)
• Fix wrong checking for heap struct (#21511)
• Allow alias enum flagged to have bit operations (#21532)
• Simplify, utilize pref.vroot (#21096)
• Fix option interface member checking when none is passed (#21509)

Parser improvements

• Fix option as possible match case for sumtype (#21079)
• orm: disallow invalid infix for where clause in delete and update (#21113)
• Fix case of falsely registering imports as used, remove unused imports (#21156)
• Remove redundant comments_mode field (#21198)
• Update file path fields; use more expressive name for file path, remove obsolete file_name_dir field (#21202)
• Add missing docstrings for vlib/v/ast/comptime_const_values.v functions (#21219)
• Allow struct init on for in Iterator{} { (fix #21179) (#21282)
• Fix for x in Iterator{} {, when there are no field initialisations (#21333)
• Add check for result type on chan init (#21363)
• Fix comptime panic for $tmpl("x.html"), when the template file contained % at the end (#21402)
• Parse string and array typ idx of ScopeVar and Ident (#21523)

Compiler internals

• v.util: use tmp instead of cache dir for temporary diff files (#21075)
• v.util: fix module lookup if module import parts end with the word modules (#21083)
• v.util: update githash to be able to get the githash of every passed project (#21178)
• v.util: improve detection for opendiff when automatically searching difftools (#21241)
• v.util: improve color_compare_files (#21247)
• v.util: improve find_diff_cmd: don't add spaces to result without env opts (#21242)
• v.util: fix diff coloring, add test (#21260)
• v.util: polish off diff utils after recent updates and fixes, add doc comments to pub fns (#21275)
• v.builder: suggest using v wipe-cache, when the object files are not recognized
• pref: be more conservative when generating code using -cross, allow for $if cross ? {
• builder: use cc enum in CcompilerOptions, fix cc detection, enable cc guessing without prod flag (#21370)
• pref: fix version flag handling (#21377)
• pref: make minor performance related changes / simplify (#21379)
• builder: simplify generic cc detection (#21380)
• pref: extract architecture related code into arch.c.v; rename pref.c.v to pref.v (#21387)
• pref: update os_from_string, add missing qnx, remove deprecated wasm options that used - instead of _ (#21390)
• v.util: rewrite diff module, deprecate old functions (#21403)
• v.util: fix color when auto tool is diff (#21435)
• v.util: make diff_test.v more robust to the color settings for the chosen local diff tool
• v.util: fix performance with v test-cleancode, when a slower diff tool is installed (#21447)
• v.util: remove fast path in diff.compare_text (#21458)
• v.pref: error for v file.v --unknown-option (#21391)

Standard library

• builtin,dlmalloc: fixes for v vlib/v/gen/c/coutput_test.v for gcc14.1, which is stricter
• Min window width and height
• builtin: str.last_index(); pref: hide-auto-str;
• toml: update the alexcrichton and BurntSushi repos to their successors toml-rs, and toml-test, record new exceptions (#21152)
• json: allow i32 decoding and encoding (#21162)
• json2: add ability to decode arrays (#21163)
• json2,checker,toml: allow field.typ compile-time checking with MatchExpr and add array of option checking (#21171)
• gg: draw_text with custom fonts
• x.json2: add a way to decode an array (#21186)
• os: clarify some doc comments (#21209)
• os: fix double free in os.get_raw_line() (used by os.input), with -autofree (#21204)
• time: extract Duration related code into duration.v (#21229)
• builtin: implement an at_exit(cb) wrapper for C.atexit (part 1) (#21254)
• os: format readme, fix markdown inside html (#21286)
• time: update unix time acces, fix issues related to deviating unix times (#21293)
• vlib: refactor empty string checks to use s == '' or s != '', instead of s.len == 0 (#21300)
• cli: update command_test.v (#21307)
• cli: extend control over defaults (#21308)
• thirdparty/sokol: bump _SGL_DEFAULT_MAX_VERTICES and _SGL_DEFAULT_MAX_COMMANDS again; mark them with __v_ start and __v_ end
• sync: add Gentoo paths for libatomic
• sync.stdatomic: add flag lines for gcc 14 too
• gg: make PenConfig fields public (#21353)
• builtin: fix undefined read s[0], from ''.is_lower() and ''.is_upper() in c7af2c2
• builtin: fix empty string lower / upper assert (#21358)
• cli: simplify flag parsing (#21392)
• os,runtime: workaround for v.c generation instability
• datatypes: fix for set - operator, union and intersection, now they no longer change the receiver (fix #21315) (#21362)
• sync.stdatomic: add paths for compilation with musl on Gentoo (#21400)
• os: fix os.execute stderr redirection (fix #20986) (#21404)
• time: fix the string representation of a negative Duration (#21407)
• cli: make program outputs using the cli module testable in cli/testdata (#21456)
• math.unsigned: permit _ separators in Uint128 decimal strings passed to uint128_from_dec_str (#21461)
• cli: fix default flags when their command equivalents are disabled (#21469)
• toml: simplify decode_quoted_escapes (#21472)
• os: fix join-path (#21425)
• builtin: simplify MessageError.msg() (#21524)
• all: replace usages of C.atexit(cb) with at_exit(cb) or {} (part 2) (#21263)
• math.unsigned: fix some Uint256 bugs and add tests (#21528)

Web

• Update mbedtls to latest compatible version v3.3.0 (#21118)
• veb.auth: a minor find_token fix
• Improve descriptions (#21155)
• ci: change listen ports in vweb_should_listen_on_both_ipv4_and_ipv6_by_default_test.v for both vweb and x.vweb, to reduce probability of network errors
• ci: mark both vweb and x.vweb versions of vweb_should_listen_on_both_ipv4_and_ipv6_by_default_test.v as flaky
• x.vweb: accept query params as method arguments (#21201)
• net.http.file: support index_file (index.html by default), and auto_index (true by default) parameters to file.serve()
• veb: copy x.vweb to veb, and make it work with comptime
• ci: fix the ubuntu-docker-musl job by skipping veb_app_test.v
• pref: support a shortcut: v -http for v -e "import net.http.file; file.serve()" .
• net: add a .port()! method for net.Addr (#21412)
• net: improve error message in .port()
• picoev: handle EAGAIN or EWOULDBLOCK quietly (#21480)
• net.unix: remove debug/trace eprintln (#21517)

ORM

• Add error for unchecked option multi return types, fix undefined behavior (#21106)

Database drivers

• db.mysql: fix invalid memory access in exec_one for returned rows with NULL fields (#21317)

C backend

• Enable autofree for option (#21051)
• Force C struct types which does not implement str() to be passed as ptr (#21054)
• Improve diagnostic information for ORM queries with invalid types
• Allow static call on generic type (#21071)
• Fix code generation for a struct field, having a type of fixed array of options field [5]?Type (#21082)
• Add the _M_ARM64 macro to endianness check (#21109)
• Fix return code when returning interface result type (fix #21115) (#21130)
• Fix const initialized with array (#21131)
• Fix infix array heap comparison (#21145)
• Fix C struct sumtype support (#21129)
• Add autofree comptime check (#21197)
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