Re: Compile time initialization of AA

[Seb via Digitalmars-d-learn]

On Friday, 23 March 2018 at 22:43:47 UTC, Xavier Bigand wrote:
I am trying to initialize an global immutable associative array 
of structs, but it doesn't compile.
I am getting the following error message : "Error: not an 
associative array initializer".

As I really need to store my data for a compile time purpose if 
we can't do that with AA, I'll use arrays instead.

Here is my code :
struct EntryPoint
{
    string  moduleName;
    string  functionName;
    bool    beforeForwarding = false;
}

immutable EntryPoint[string]  entryPoints = [
    "wglDescribePixelFormat": 
{moduleName:"opengl32.forward_initialization", 
functionName:"wglDescribePixelFormat"}
];

Try this:

https://run.dlang.io/is/b7VQVB

tl;dr: you can instantiate immutable data in the module 
constructors.

---
struct EntryPoint
{
    string moduleName;
    string functionName;
    bool beforeForwarding = false;
}

static immutable EntryPoint[string] entryPoints;

shared static this()
{
    EntryPoint p = {moduleName:"opengl32.forward_initialization", 
functionName:"wglDescribePixelFormat"};
    entryPoints = ["wglDescribePixelFormat" : p];
}

void main()
{
    import std.stdio;
    entryPoints.writeln;
}
---