I am unable to find the implementation of built-in functions.
In builtin.go, this is what I found:
// The copy built-in function copies elements from a source slice
into a
// destination slice. (As a special case, it also will copy bytes
from a
// string to a slice of bytes.) The source and destination may
overlap. Copy
// returns the number of elements copied, which will be the minimum
of
// len(src) and len(dst).
func copy(dst, src []Type) int
Where is the actual implementation of the built-in functions?