Dlang and curly brace language noob here. I'm trying to work with the raylib-d library. I downloaded raylib-d using dub, and I installed raylib with my package manager on Manjaro.  I'm getting a mismatch in the arguments I'm passing to LoadTexture.

source/app.d(7,32): Error: function raylib.LoadTexture(const(char)* fileName) is not callable using argument types (string)

In the raylib-d docs/cheatsheet it says LoadTexture uses a string as an argument.The original raylib docs/cheatsheet says it's a const(char)* value. So it seems I'm using the C version instead of the D version? The relevant section of the code below is

import raylib;

void main()
{
	InitWindow(800, 600, "Hello, Raylib-D!");
	string fname = "assets/tile_022.png";
	Texture2D player = LoadTexture(fname);
	while (!WindowShouldClose()){
        ...
	
}



{
        "authors": [
                "Me"
        ],
        "copyright": "Copyright © 2021, Me",
        "dependencies": {
                "raylib-d": "~>3.0.3"
        },
        "description": "A minimal D application.",
        "libs": [
                "raylib"
        ],
        "license": "proprietary",
        "name": "raylib_test"
}

Does anyone know why this is happening?

On 2/19/21 5:26 PM, Decabytes wrote:
> Dlang and curly brace language noob here. I'm trying to work with the raylib-d library. I downloaded raylib-d using dub, and I installed raylib with my package manager on Manjaro.  I'm getting a mismatch in the arguments I'm passing to LoadTexture.
> 
> source/app.d(7,32): Error: function raylib.LoadTexture(const(char)* fileName) is not callable using argument types (string)
> 
> In the raylib-d docs/cheatsheet it says LoadTexture uses a string as an argument.The original raylib docs/cheatsheet says it's a const(char)* value. So it seems I'm using the C version instead of the D version? The relevant section of the code below is
> 
> import raylib;
> 
> void main()
> {
>      InitWindow(800, 600, "Hello, Raylib-D!");
>      string fname = "assets/tile_022.png";
>      Texture2D player = LoadTexture(fname);

raylib-d does not have D wrappers for everything. You are supposed to use the C functions.

D's string literals are null-terminated. However, the language only allows actual literals to be implicitly converted to immutable(char)* as literals, not as general strings.

So this will work:

Texture2D player = LoadTexture("assets/tile_022.png");

And this will work too (because string literals are null terminated):

string fname = "assets/tile_022.png";
Texture2D player = LoadTexture(fname.ptr);

If you have a string that you aren't sure is a string literal, you can use std.string.toStringz to convert it, but this will allocate another string (possibly).

import std.string;
Texture2D player = LoadTexture(fname.toStringz);

-Steve

On Friday, 19 February 2021 at 23:29:18 UTC, Steven Schveighoffer wrote:
> On 2/19/21 5:26 PM, Decabytes wrote:

> raylib-d does not have D wrappers for everything. You are supposed to use the C functions.
>
> D's string literals are null-terminated. However, the language only allows actual literals to be implicitly converted to immutable(char)* as literals, not as general strings.
>
> So this will work:
>
> Texture2D player = LoadTexture("assets/tile_022.png");
>
> And this will work too (because string literals are null terminated):
>
> string fname = "assets/tile_022.png";
> Texture2D player = LoadTexture(fname.ptr);
>
> If you have a string that you aren't sure is a string literal, you can use std.string.toStringz to convert it, but this will allocate another string (possibly).
>
> import std.string;
> Texture2D player = LoadTexture(fname.toStringz);
>
> -Steve

I see now. Thank you Steve!