C error from V code, static array

[HaraldWik]

V doctor:

V full version: V 0.4.8 fc6e481.1fae506
OS: linux, Pop!_OS 24.04 LTS
Processor: 16 cpus, 64bit, little endian, AMD Ryzen 7 4800HS with Radeon Graphics

getwd: /home/admin/Projects/game-engine/src/input
vexe: /home/admin/.v/v
vexe mtime: 2024-12-16 18:15:33

vroot: OK, value: /home/admin/.v
VMODULES: OK, value: /home/admin/.vmodules
VTMP: OK, value: /tmp/v_1000

Git version: git version 2.43.0
Git vroot status: weekly.2024.50-49-g1fae5069
.git/config present: true

CC version: cc (Ubuntu 13.3.0-6ubuntu2~24.04) 13.3.0
emcc version: N/A
thirdparty/tcc status: thirdparty-linux-amd64 0134e9b9-dirty

What did you do?
./v -g -o vdbg cmd/v && ./vdbg keyboard.v

module input

import sdl

pub fn get_pressed_keys() []Key {
	mut pressed_keys := []Key{}
	numkeys := 0
	keyboard_state := sdl.get_keyboard_state(&numkeys)

	for scancode in 0 .. numkeys {
		unsafe {
			if keyboard_state[scancode] != 0 {
				if key := Key.from(scancode) {
					pressed_keys << key
				}
			}
		}
	}

	pressed_keys << get_pressed_mouse_buttons()

	if pressed_keys.len < 1 {
		return [.none]
	}

	return pressed_keys
}

pub fn is_pressed(keys ...Key) bool {
	pressed_keys := get_pressed_keys()
	for key in keys {
		if key !in pressed_keys {
			return false
		}
	}
	return true
}

@[unsafe]
pub fn is_just_pressed(key Key) bool {
	mut static pressed_keys := []Key{}
	if !pressed_keys.contains(key) && is_pressed(key) {
		pressed_keys << key
		return true
	} else if pressed_keys.contains(key) && is_pressed(key) {
		pressed_keys.filter(it != key)
		return false
	}

	return false
}

/*
func IsJustPressed(keycode string) bool {
	current := IsPressed(keycode)
	pressed := current && !previousPressed[keycode]
	previousPressed[keycode] = current

	return pressed
}

^ go version
*/

What did you expect to see?

not get a c error from the is_just_pressed function

What did you see instead?

keyboard.v:5:27: error: unknown type `input.Key`
    3 | import sdl
    4 | 
    5 | pub fn get_pressed_keys() []Key {
      |                           ~~~~~
    6 |     mut pressed_keys := []Key{}
    7 |     numkeys := 0
keyboard.v:29:27: error: unknown type `input.Key`
   27 | }
   28 | 
   29 | pub fn is_pressed(keys ...Key) bool {
      |                           ~~~
   30 |     pressed_keys := get_pressed_keys()
   31 |     for key in keys {
keyboard.v:40:28: error: unknown type `input.Key`
   38 | 
   39 | @[unsafe]
   40 | pub fn is_just_pressed(key Key) bool {
      |                            ~~~
   41 |     mut static pressed_keys := []Key{}
   42 |     if !pressed_keys.contains(key) && is_pressed(key) {
keyboard.v:1:1: error: project must include a `main` module or be a shared library (compile with `v -shared`)
    1 | module input
      | ^
    2 | 
    3 | import sdl
If the code of your project is in multiple files, try with `v .` instead of `v keyboard.v`

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_{Huly®: V_0.6-21629}

[jorgeluismireles]

Yours is not a C code error but a V error. If you are using the official sdl module I think you need change Key by
sdl.KeyCode.

When you use Key alone the compiler thinks Key is located in your module (which is called input) so the V error report says I can't found input.Key. In case you have a struct called Key you need to include the module where is located.