Improved error message during preprocessor expansion. Closes #683

src/main/java/dk/camelot64/kickc/parser/CParser.java

@@ -98,7 +98,7 @@ public class CParser {
                int charPositionInLine,
                String msg,
                RecognitionException e) {
-            final CommonToken offendingToken = (CommonToken) offendingSymbol;
+            final Token offendingToken = (Token) offendingSymbol;
             StatementSource source = new StatementSource(offendingToken.getInputStream().getSourceName(), line, charPositionInLine, null, -1, -1);
             throw new CompileError("Error parsing file: " + msg, source);
          }

src/test/java/dk/camelot64/kickc/test/TestProgramsFast.java

@@ -929,6 +929,11 @@ public class TestProgramsFast extends TestPrograms {
       compileAndCompare("cstyle-decl-function.c");
    }
 
+   @Test
+   public void testPreprocessor15() throws IOException {
+      assertError("preprocessor-15.c", "Error parsing file: extraneous input 'X' ");
+   }
+
    @Test
    public void testPreprocessor14() throws IOException {
       compileAndCompare("preprocessor-14.c");

src/test/kc/preprocessor-15.c

@@ -0,0 +1,7 @@
+// Demonstrates a problem with the preprocessor where the syntax error in the number results in an exception instead of a readable error
+
+#define POKE(X,Y) (*(unsigned char*)(X))=Y
+
+void main() {
+    POKE(0x123X,1);
+}