Millised andmetüübid on lubatud võtmetena kaardistruktuuris?

In Go, map keys can only be of data types that support the comparison operation (comparable). This means that keys can be:

• Boolean values (bool)
• Numbers (int, float, complex, etc.)
• Strings (string)
• Pointers
• Interfaces, if the dynamic type supports comparison
• Structures, if all their fields are comparable

Slices, maps, functions, and other non-comparable types cannot be used as keys because they do not support the == operator.

Example:

m := make(map[string]int)
m["key"] = 42

// Structure with comparable fields
type Point struct {
    X, Y int
}

m2 := make(map[Point]string)
m2[Point{1,2}] = "A point"