• JC (35/35) Jan 20 2015 The following code throws a
• ketmar via Digitalmars-d-learn (3/44) Jan 20 2015 `writeln` can allocate.

"JC" <mx4399 gmail.com> writes:

The following code throws a 
core.exception.InvalidMemoryOperationError (0), anyone have an 
idea of what is causing it?

---

import std.stdio;

class Test
{
	this()
	{
		struct Start
		{
			string filename;
		}
		Message!(Start)(Start("one.txt"));
	}

	~this()
	{
		struct Stop
		{
			string filename;
		}
		Message!(Stop)(Stop("one.txt"));
	}
}

unittest
{
	auto t = new Test();
}

struct Message(T)
{
	this(T message)
	{
		writeln(typeid(T));
		writeln(message);
	}

ketmar via Digitalmars-d-learn <digitalmars-d-learn puremagic.com> writes:

On Tue, 20 Jan 2015 17:59:38 +0000
JC via Digitalmars-d-learn <digitalmars-d-learn puremagic.com> wrote:

 The following code throws a=20
 core.exception.InvalidMemoryOperationError (0), anyone have an=20
 idea of what is causing it?
=20
 ---
=20
 import std.stdio;
=20
 class Test
 {
 	this()
 	{
 		struct Start
 		{
 			string filename;
 		}
 		Message!(Start)(Start("one.txt"));
 	}
=20
 	~this()
 	{
 		struct Stop
 		{
 			string filename;
 		}
 		Message!(Stop)(Stop("one.txt"));
 	}
 }
=20
 unittest
 {
 	auto t =3D new Test();
 }
=20
 struct Message(T)
 {
 	this(T message)
 	{
 		writeln(typeid(T));
 		writeln(message);
 	}

`writeln` can allocate.