Error message for duplicate @[flag] enum is confusing

[revosw]

Describe the feature

Minimal reproduction:

// main.v

@[flag]
pub enum Enum {
    a
}

@[flag]
pub enum Enum {
    a
}

v main.v

Compiling main.v results in the error:

main.v:4:44: error: duplicate method `is_empty`, `is_empty` is an enum type built-in method
    2 | pub enum Enum {
    3 |     a
    4 | }
      |  ^
    5 | 
    6 | @[flag]

Use Case

Having clear error messages makes me more productive

Proposed Solution

The error message may be the same as duplicate regular enums, which reads:

main.v:6:1: error: cannot register enum `Enum`, another type with this name exists
    4 | }
    5 | 
    6 | pub enum Enum {
      | ~~~~~~~~~~~~~
    7 |     a
    8 | }

Other Information

No response

Acknowledgements

• I may be able to implement this feature request
• This feature might incur a breaking change

Version used

V 0.4.8 3108820

Environment details (OS name and version, etc.)

V full version: V 0.4.8 3108820
OS: windows, Microsoft Windows 11 Pro v22631 64-bit
Processor: 12 cpus, 64bit, little endian,

getwd: C:\dev\v\winmd
vexe: C:\dev_tools\v\v.exe
vexe mtime: 2024-11-04 09:25:35

vroot: OK, value: C:\dev_tools\v
VMODULES: OK, value: C:\Users\simen.vmodules
VTMP: OK, value: C:\Users\simen\AppData\Local\Temp\v_0

Git version: git version 2.40.0.windows.1
Git vroot status: weekly.2024.26-746-g3108820d
.git/config present: true

CC version: Error: 'cc' is not recognized as an internal or external command,
operable program or batch file.

thirdparty/tcc status: thirdparty-windows-amd64 b425ac82

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