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`eval` Function

The eval function is used to evaluate a string as a Glish statement and return the result. This is probably most useful for allowing users to enter Glish commands from a GUI. Here is an example of how eval is used:

    x := 10
    y := 18
    print eval("y +:= 2", "x * y")

In this example, the output is 200, and y equals 20. Currently, the strings passed to eval are always evaluated in the global scope. This is true even if eval is called from a function; this is a bug. The result is the following unexpected behavior:

    x := 10
    y := 18
    func foo() { y := 2; return eval("y +:= 2", "x * y") }
    print foo()

This example results in an output of 200 and the global y equal to 20 (the same as the previous example). This will hopefully be fixed in a later release.

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eval Function

`eval` Function