Allows annonymous struct type to be passed as args

[XiaoPangxie732]

Describe the feature

Allows passing anonymous struct type where a method parameter requires a type

Use Case

For example the json decoding:

json_text := '{ "a": "b" }'
b := json.decode(struct {
	a string
}, json_text)!.a

there's no need to create a named struct type if the decoding of this type only exists here

Proposed Solution

No response

Other Information

https://discord.com/channels/592103645835821068/700746775962714232/1252377577083895919

Acknowledgements

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

Version used

V 0.4.6 58f4e12

Environment details (OS name and version, etc.)

V full version: V 0.4.6 30d6f7b.58f4e12
OS: windows, Microsoft Windows 11 רҵ�� v22631 64 λ
Processor: 12 cpus, 64bit, little endian,

getwd: xxx
vexe: E:\Programs\v\v.exe
vexe mtime: 2024-06-19 12:43:43

vroot: OK, value: E:\Programs\v
VMODULES: OK, value: C:\Users\xxx.vmodules
VTMP: OK, value: C:\Users\xxx\AppData\Local\Temp\v_0

Git version: git version 2.38.1.windows.1
Git vroot status: weekly.2023.24-2387-g58f4e126
.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 a39eb79b

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