Less mixin to create grid system

grid_system

/* Less mixin to create grid system */
.grid(@grid_context,@grid_margin,@grid_cols){

  @grid_n_context: @grid_context + @grid_margin;
	.grid_l(@index) when (@index > 0){
		@selector: ~".grid_@{index}";
		@margin: @grid_margin/@grid_context;
		@grid_col_size: @grid_n_context/@grid_cols;
		
		@{selector}{
			width: percentage(((@index*@grid_col_size)/@grid_context) - @margin);
			margin-right: percentage(@margin);
			float: left;
	    };
	    .grid_l((@index - 1));

	}
	.grid_l(0){}
	.grid_l(@grid_cols);
	
}

how_to_use

/* How to use /*
/* Call the function with parameters */

.grid(@grid_context,@grid_margin,@grid_cols);

* > div[class^="grid-"]:last-child, 
div[class*="grid-"]:last-child{
	margin-right: 0;
}