Elegant D

[Kagamin]

Hybrid reference/value type:
```
/// Buffered output stream
struct OutputStream
{
	/// Reference type
	package Instance* I;
	/// Implicitly convertible to value type
	pure ref Instance Forward(){ debug assert(!!I); return *I; }
	/// ditto
	alias Forward this;
	/// Null check
	const pure bool opCast(){ return !!I; }
/// Use this to store `OutputStream` as value type
struct Instance
{
	/// Implicitly convertible to reference type
	pure OutputStream Reference(){ return OutputStream(&this); }
	/// ditto
	alias Reference this;
	...other methods
	@disable this(this); //not copyable
}
}


/**
Text interface for `OutputStream`.
Examples:
---
OutputStream ostr;
auto wr=TextWriter(ostr);
wr.Write("text string");
---
*/
struct TextWriter
{
	OutputStream Output;
	void Write(in char[] txt)
	{
		Output.Write(cast(const byte[])txt); //trust.bytes;
	}
	void Write(in char[][] txts...)
	{
		foreach(txt;txts)Write(txt);
	}
}
```