[sr-dev] evaluating expression stored in a variable

i think i asked this once before, but i'm not sure what the conclusion was: it is somehow currently possible to evaluate an runtime an expression stored in variable, for example, $var(exp) = ";param=$avp(value)"; append_hf("P-Foo: " + $var(uri) + eval($var(exp)) + "\r\n"); in practice, the expression to be evaluated could come from database, htable, etc., which would in my opinion greatly enhance flexibility of sr. if that cannot be done in sr 3.1, would it be difficult to implement it for the next version? -- juha