TODO

• array type
• function
• (class or struct)

PROBLEM

int x = 5
if (x < 6) x = 7 // error since the type of if-statement is not evaluated before.
else 0
x

int x = 5
if (true) {
    int y = 6
    x = x + y
} else {
    int y = 7
    x = x + y
}

NOT TODO

• error handling