Millistel tingimustel toimub automaatne mälu eraldamine dünaamilisest piirkonnast programmi kompileerimise või täitmise ajal?

In Go, automatic memory allocation from the dynamic area (heap) occurs during program execution when the compiler or runtime determines that a variable should live longer than the current function or goroutine.

Conditions under which allocation occurs on the heap:

• If the variable is captured in a closure and can be used after exiting the function.
• If the variable is returned from the function or passed to another goroutine.
• If the compiler cannot guarantee that the variable will be destroyed after exiting the current scope.

The Go compiler performs escape analysis to determine which variables need to be placed on the heap and which on the stack.

Example:

func f() *int {
    x := 10
    return &x // x "escapes" to the heap because a pointer is returned
}

Here, x is allocated on the heap because a pointer to it is returned and can be used outside its scope.