Functions

Spice distinguishes strictly between functions and procedures. Functions are used to return something, that was calculated from a given input. Other than procedures, functions must have a return value. The paradigm here is, that a function calculates and returns something whereas a procedure executes some action without a result.

Usage¶

Functions in Spice can be defined like this:

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f<double> functionName() {
    ... // Do something
    return 5.6; // Return some value anywhere in the function body
}

Spice also allows you to pass arguments to a function. This arguments may also have default values, which can then be omitted when calling the function.

Example with default parameter value¶

Here, the second argument is one with a default value attached.

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f<int> demoFunction(string arg1, double arg2 = 5.89) {
    ... // Do something with the arguments
    result = -4;
}

This function could get called like so:

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int result1 = demoFunction("input");
int result1 = demoFunction("another input", 1.0);