Exceptions

Reflex supports exceptions in the form of a try/catch construct. An example will best illustrate the approach.

// A simple test of exception structure

x = 0;
y = false;

def addIt(var)
   var = var + 1;
   throw "From the function " + var;
   return var;
end

try do
    x = addIt(x);
    println("After function, but not caught");
end
catch e do
    println("Caught exception " + e);
    y = true;
end

assert(x == 0);
assert(y);

In this example we calla function that will increment our parameter, but the function throws an exception before the parameter is returned. In the exception handler we set the y variable to true. Both assertions at the end of the script are valid -- x is still zero because the function threw an exception before it could be updated. And y is true because we entered the exception handler.

Reflex can also catch general exceptions thrown by internal or addin functions.

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