Evaluate a block of code.
Eval dynamically evaluates a block of code to give a piece of text, which is fed through the parser. This gives a statement list, which is then executed.
set x = "foo"; set y = "bar"; set bar = "bat"; eval("set $x = \$$y;"); // _evaluates to set foo = $bar_ // foo will now be "bat"
Last modified May 19, 2020: after dmscript (aa9d9ae)