[fpc-pascal] Assign int64 to int32 shows no warnings at compilation time

[Graeme Geldenhuys]

On 18/12/2018 17:52, Jonas Maebe wrote:
> You are assigning an int64 constant to a 32 bit variable here. In your 
> Pascal program, you are assigning a 64 bit *variable* to a 32 bit variable.

It makes no difference. MAX_VALUE holds the largest value of a Int64.

  https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html#MAX_VALUE



public class Overflow {

    public static void main(String[] args) {

        int d32;
        long d64;

        d64 = Long.MAX_VALUE;
        d32 = d64;

        System.out.println(d32);
        System.out.println(d64);

    }

}


The same result at compile time:


$ javac Overflow.java
Overflow.java:9: error: incompatible types: possible lossy conversion
from long to int
        d32 = d64;
              ^
1 error



Regards,
  Graeme

-- 
fpGUI Toolkit - a cross-platform GUI toolkit using Free Pascal
http://fpgui.sourceforge.net/

My public PGP key:  http://tinyurl.com/graeme-pgp