How Can I Avoid Type Assertions Within Go's Type Switch Branches?

Avoiding Type Assertions in Type Switch Branches

Type switches in Go provide a convenient way to handle different types of data. However, in some cases, you may wish to avoid explicitly asserting the type of a variable within the case branches.

Solution:

To bypass the need for type assertions, you can assign the result of the type switch directly to the variable being checked. This will automatically assign the variable to the correct type based on the match:

switch question := question.(type) {
case interfaces.ComputedQuestion:
    handleComputedQuestion(question, symbols)
case interfaces.InputQuestion:
    handleInputQuestion(question, symbols)
}

In this example, the question variable will be assigned to the appropriate type based on the match in the switch statement. As a result, you can pass question directly to the handleComputedQuestion or handleInputQuestion functions without the need for an explicit type assertion.

This technique can simplify your code and improve readability. By avoiding type assertions in the branches of a type switch, you can keep your code more concise and maintainable.

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