Add warning for integer literals not fitting into long

Signed-off-by: Stefan Marr <git@stefan-marr.de>
smarr · Jul 25, 2017 · cd369ee · cd369ee
1 parent f14e6c7
commit cd369ee
Showing 1 changed file with 9 additions and 1 deletion.
diff --git a/src/som/compiler/NumeralParser.java b/src/som/compiler/NumeralParser.java
@@ -5,6 +5,8 @@
 
 import java.math.BigInteger;
 
+import som.VM;
+
 
 public class NumeralParser {
 
@@ -88,7 +90,13 @@ private long calculateNumberWithRadixLong() {
         v = c - 'A' + 10 /* A has value 10 */;
       }
 
-      result = Math.addExact(result, (long) (Math.pow(r, length - i - 1) * v));
+      try {
+        result = Math.addExact(result, (long) (Math.pow(r, length - i - 1) * v));
+      } catch (ArithmeticException e) {
+        // TODO: need to overflow into BigInteger
+        VM.errorPrintln("Warning: Parsed Integer literal which did not fit into long. " + lexer.getCurrentLineNumber() + ":" + lexer.getCurrentColumn());
+        return result;
+      }
     }
     return result;
   }