Roll my own precompiler with macros?

Unity Engine
1

I’ve been sorely missing macros and templates from c++, and would like to build my own precompiler to do some text substitution in my code.

It would be a script in c# that picks up my c# files from the unity project, does my search replace, and writes the modified files to a temporary location, then has Unity compile the temporary code as it normally does.

Does anyone know if this is possible, and where I might start?

TIA

2

In C# you can get similar features with generics and a limited set of macros… you’d have to replace anything aside from the basic #define X with a method though.

#define DEBUG

using UnityEngine;
using System.Collections;


public class GenericsTest : MonoBehaviour 
{

	// Use this for initialization
	void Start () {
		MyGenericMethod<int>();
		MyGenericMethod<float>();
	}
	
	// Update is called once per frame
	void Update () {
	
	}
	
	public void MyGenericMethod<T>()
	{
		T x;
		#if DEBUG
		Debug.Log("Type of x = " + typeof(T));
		#endif
	}
}

This is an example of both, though the whole ‘#if DEBUG’ is a little silly in Unity of course. Generics can take generic parameters just like templates in C++.

I have no idea how to go about writing a pre-processor in Unity though.

3

Unfortunately, I am using the iPhone version, so I don’t get to use generics.