Assigning a type uintptr to uint64 in Golang
go, pointers, variable-assignment
Solution
First, cast `valFromSystem` into an `unsafe.Pointer`. An `unsafe.Pointer` can be casted into any pointer type. Next, cast the `unsafe.Pointer` into a pointer to whatever type of data `valFromSystem` points to, e.g. an `uint64`.
ptrFromSystem = (*uint64)(unsafe.Pointer(valFromSystem))
If you just want to get the value of the pointer (without dereferencing it), you can use a direct cast:
uint64FromSystem = uint64(valFromSystem)
Though remember that you should use the type `uintptr` when using pointers as integers.
Problem
I'm trying to assign the value found in a variable of type `uintptr` to a `uint64` variable in Go. Using ``` myVar = valFromSystem ``` gives me cannot use `valFromSystem` (type `uintptr`) as type `uint64` in assignment And trying ``` myVar = *valFromSystem ``` gives me invalid indirect of valFromSystem (type uintptr) Is there a way to pull the value pointed to by valFromSystem to assign to `myVar`?