`%eval()`

Evaluates the string as an expansion, and returns the result. The main difference between using this expansion and just using %{…} is that the string being evaluated can be dynamically changed.

Syntax

%eval(string)

Example 1. Evaluate an attribute or a string directly

if (User-Name == "bob") {
    control.Filter-Id := "User-Name"
} else {
    control.Filter-Id := "not bob!"
}

reply.Reply-Message := "%eval(control.Filter-Id}"

Output when User-Name == bob

bob

Output when User-Name == jim

not bob!

Example 2. Evalute an expression

control.Filter-Id := 'User-Name == "bob"'

if (%eval(control.Filter-Id)) {
        reply.Reply-Message := "yes it's bob"
} else {
        reply.Reply-Message := "not bob!"
}

Output when User-Name == bob

yes it's bob

Output when User-Name == jim

not bob!