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digitalmars.D.learn - Classes with indexes

reply peter <p.adject mdt.org> writes:
Hello guys,

I have the following class...

class myclass
{
    private ubyte[] Array;
}

...and i want to create an instance of this class and access the array as
follows:

myclass mc = new myclass();
mc[0] = 100;

I was complety sure i saw this in the newsgroup but i canīt remember where
exactly.
How is this "thing" called?
In the .NET framework i see it in almost every library.

I hope you guys get the idea, please help.
Jan 02 2008
parent reply Daniel919 <Daniel919 web.de> writes:
 I have the following class...
 
 class myclass
 {
     private ubyte[] Array;
 }
 
 ...and i want to create an instance of this class and access the array as
follows:
 
 myclass mc = new myclass();
 mc[0] = 100;


import std.stdio;

class myclass
{
	private ubyte[] Array;
	
	void opIndexAssign(ubyte value, size_t i) {
		if( Array.length <= i )
			Array.length = i+1;
		Array[i] = value;
	}
	
	ubyte opIndex(size_t i) { return Array[i]; }
}

void main()
{
	myclass mc = new myclass();
	mc[0] = 100;
	writefln( mc[0] );
}



http://www.digitalmars.com/d/operatoroverloading.html

Best regards,
Daniel
Jan 02 2008
parent peter <p.adject mdt.org> writes:
Daniel919 Wrote:


 I have the following class...
 
 class myclass
 {
     private ubyte[] Array;
 }
 
 ...and i want to create an instance of this class and access the array as
follows:
 
 myclass mc = new myclass();
 mc[0] = 100;


 
 import std.stdio;
 
 class myclass
 {
 	private ubyte[] Array;
 	
 	void opIndexAssign(ubyte value, size_t i) {
 		if( Array.length <= i )
 			Array.length = i+1;
 		Array[i] = value;
 	}
 	
 	ubyte opIndex(size_t i) { return Array[i]; }
 }
 
 void main()
 {
 	myclass mc = new myclass();
 	mc[0] = 100;
 	writefln( mc[0] );
 }
 
 
 
 http://www.digitalmars.com/d/operatoroverloading.html
 
 Best regards,
 Daniel


Hahaha, cool man thanks, thatīs exactly what i needed.

"Array Operator Overloading: Overloading Indexing" Thatīs the name for it. Iīve
learned something new today, thanks again.
Jan 02 2008