Can Go Variadic Functions Mix Enumerated Arguments and Existing Slices?

Mixing "Exploded" Slices and Regular Parameters in Variadic Functions

In Go, variadic functions allow for an arbitrary number of arguments. However, it is not possible to combine both enumerated elements and existing slices when specifying the arguments.

Variadic Argument Syntax

The value passed to a variadic parameter can either be specified through:

1. Enumerating individual elements: func(arg1, arg2, arg3 ...string) {}
2. Using an existing slice: func(s []string) {}

Mixing Enumerated Elements and Slices

The following code will not compile:

This is because Go does not allow mixing the two syntaxes. When enumerating individual elements, a new slice is created. When using an existing slice, the same slice is used as the variadic parameter.

Reason for the Limitation

The limitation is due to the way Go processes variadic arguments. When enumerating elements, a new slice is created to hold the values. However, if an existing slice is passed, no new slice is created. Instead, the passed slice is directly assigned to the variadic parameter. Mixing the two would require allocating a new slice, which is not currently supported.

The above is the detailed content of Can Go Variadic Functions Mix Enumerated Arguments and Existing Slices?. For more information, please follow other related articles on the PHP Chinese website!