msvc fixed array init bug #25291
Description
Describe the bug
vlib/v/tests/modules/sub/global_fixed_array_test.v has bug with msvc .
Reproduction Steps
a modified version of vlib/v/tests/modules/sub/global_fixed_array_test.v
bug.v
@[has_globals]
module main
import sub.foo
struct DummyStruct {
dummy_item int // change `i32` to `int` will fire the bug
}
// vfmt off
__global (
d [foo.num_elements]DummyStruct
)
// vfmt on
const f = [foo.num_elements]DummyStruct{}
fn test_main() {
assert dump(foo.num_elements) == 2
assert dump(f) == [foo.num_elements]DummyStruct{}
assert dump(d) == [foo.num_elements]DummyStruct{}
}v -cc msvc bug.v
Expected Behavior
compile
Current Behavior
D:\v\v\v>v vlib/v/tests/modules/sub/global_fixed_array_test.v -showcc -keepc -cc msvc
> C compiler cmd: "C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.44.35207\bin\Hostx64\x64\cl.exe" "@C:\Users\DDT\AppData\Local\Temp\v_0\global_fixed_array_test.tmp.c.rsp"
> C compiler response file "C:\Users\DDT\AppData\Local\Temp\v_0\global_fixed_array_test.tmp.c.rsp":
-w /we4013 /volatile:ms /F 16777216 /MD /DNDEBUG /DNO_DEBUGGING "C:\Users\DDT\AppData\Local\Temp\v_0\global_fixed_array_test.tmp.c" -I "C:\Program Files (x86)\Windows Kits\10\Include\10.0.26100.0\ucrt" -I "C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.44.35207\include" -I "C:\Program Files (x86)\Windows Kits\10\Include\10.0.26100.0\um" -I "C:\Program Files (x86)\Windows Kits\10\Include\10.0.26100.0\shared" -I "D:\v\v\v\vlib\v\tests\modules\sub\foo\c" kernel32.lib user32.lib advapi32.lib ws2_32.lib dbghelp.lib ws2_32.lib advapi32.lib /link /nologo /OUT:"D:\v\v\v\vlib\v\tests\modules\sub\global_fixed_array_test.exe" /LIBPATH:"C:\Program Files (x86)\Windows Kits\10\Lib\10.0.26100.0\ucrt\X64" /LIBPATH:"C:\Program Files (x86)\Windows Kits\10\Lib\10.0.26100.0\um\X64" /LIBPATH:"C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.44.35207\lib\X64" /DEBUG:FULL
================== C compilation error (from msvc): ==============
global_fixed_array_test.tmp.c
C:\Users\DDT\AppData\Local\Temp\v_0\global_fixed_array_test.tmp.c(2132): error C2099: ʼֵ趨dz��
builder error: msvc error
Possible Solution
In cgen, it just skip the i32 check, which make the original vlib/v/tests/modules/sub/global_fixed_array_test.v passed test.
in fn (mut g Gen) type_default_impl(
field_sym.kind in [.enum, .array_fixed, .array, .map, .string, .bool, .alias, .i8, .i16, .int, .i64, .u8, .u16, .u32, .u64, .f32, .f64, .char, .voidptr, .byteptr, .charptr, .struct, .chan, .sum_type]need a fix.
Additional Information/Context
No response
V version
V 0.4.11 ce88c56.a8d200a
Environment details (OS name and version, etc.)
| V full version | V 0.4.11 ce88c56.a8d200a |
|---|---|
| OS | windows, Microsoft Windows 10 企业版 LTSC 19044 64 位 |
| Processor | 16 cpus, 64bit, little endian, AMD Ryzen 7 7840H with Radeon 780M Graphics |
| Memory | 17.52GB/27.69GB |
| V executable | D:\v\v\v\v.exe |
| V last modified time | 2025-09-12 11:27:18 |
| V home dir | OK, value: D:\v\v\v |
| VMODULES | OK, value: C:\Users\DDT.vmodules |
| VTMP | OK, value: C:\Users\DDT\AppData\Local\Temp\v_0 |
| Current working dir | OK, value: D:\v\v\v |
| Git version | git version 2.43.0.windows.1 |
| V git status | weekly.2025.30-306-ga8d200ac-dirty |
| .git/config present | true |
| cc version | N/A |
| gcc version | N/A |
| clang version | N/A |
| msvc version | x64 Microsoft (R) C/C++ Ż 19.44.35211 |
| tcc version | tcc version 0.9.28rc 2025-04-19_mob@36ff4f52* (x86_64 Windows) |
| tcc git status | N/A |
| emcc version | N/A |
| glibc version | N/A |
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