Does Go Support Function Overloading Like C?

Does Go Support Function Overloading?

When transitioning a C library to Go, developers may encounter challenges adapting functions with variable arguments, commonly encountered in C. In Go, function overloading is not supported, unlike in C.

Consider the following Go function declarations:

func (e *Easy)SetOption(option Option, param string) {
    // ...
}

func (e *Easy)SetOption(option Option, param long) {
    // ...
}

While these functions share the same name, they accept different parameter types. However, this approach is not allowed in Go. The compiler will report an error, "redefined in this block."

In Go, method dispatch is simplified by eliminating the need for type matching. Overloading methods with different signatures was deemed to be potentially confusing and fragile. Instead, Go opts for consistency in types and name-based function matching.

While Go lacks overloaded functions, it provides variadic functions to simulate some of its functionality. Variadic functions allow for optional arguments, with default values inferred for omitted parameters. This technique, however, sacrifices type checking.

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