Disallowing code outside methods. Closes #18.

src/main/java/dk/camelot64/kickc/passes/Pass1GenerateStatementSequence.java

@@ -52,7 +52,16 @@ public class Pass1GenerateStatementSequence extends KickCBaseVisitor<Object> {
 
    @Override
    public Void visitFile(KickCParser.FileContext ctx) {
-      this.visit(ctx.stmtSeq());
+      List<KickCParser.StmtContext> stmts = ctx.stmtSeq().stmt();
+      for (KickCParser.StmtContext stmt : stmts) {
+         if (stmt instanceof KickCParser.StmtDeclarationContext || stmt instanceof KickCParser.StmtFunctionContext) {
+            this.visit(stmt);
+         } else {
+            program.getLog().append("Statement not allowed outside method. " + stmt.getText());
+            throw new CompileError("Statement not allowed outside method. " + stmt.getText());
+         }
+
+      }
       return null;
    }
 

src/main/java/dk/camelot64/kickc/test/TestPrograms.java

@@ -241,6 +241,16 @@ public class TestPrograms extends TestCase {
       compileAndCompare("forrangemin");
    }
 
+   public void testStmtOutsideMethod() throws IOException, URISyntaxException {
+      try {
+         compileAndCompare("stmt-outside-method");
+      } catch (CompileError e) {
+         // expecting error!
+         return;
+      }
+      fail("Expected compile error.");
+   }
+
    public void testUseUndeclared() throws IOException, URISyntaxException {
       try {
          compileAndCompare("useundeclared");

src/main/java/dk/camelot64/kickc/test/stmt-outside-method.kc

@@ -0,0 +1,8 @@
+
+byte b=12;
+b=b+1;
+
+void main() {
+    byte* screen = $0400;
+    *screen = b;
+}