Method isExprStmnt

src/chap14/ToJava.java:180–184

(ASTree tree)

                    throw new StoneException("bad expression statement", this); 
        }
        protected static boolean isExprStmnt(ASTree tree) {
            if (tree instanceof BinaryExpr)
                return "=".equals(((BinaryExpr)tree).operator());
            return tree instanceof PrimaryExpr || tree instanceof VarStmnt;
        }
        protected static boolean isControlStmnt(ASTree tree) {
            return tree instanceof BlockStmnt || tree instanceof IfStmnt
                   || tree instanceof WhileStmnt;