From 9081c35f53ffbc280e4b40aa914c8a2284e0cb18 Mon Sep 17 00:00:00 2001
From: Jon Trulson <jtrulson@ics.com>
Date: Wed, 9 Sep 2015 11:15:44 -0600
Subject: [PATCH] grovelinefinder: throw exception(s) on fatal errors

Signed-off-by: Jon Trulson <jtrulson@ics.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
---
 src/grovelinefinder/grovelinefinder.cxx | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/grovelinefinder/grovelinefinder.cxx b/src/grovelinefinder/grovelinefinder.cxx
index 93316bb9..297f526a 100644
--- a/src/grovelinefinder/grovelinefinder.cxx
+++ b/src/grovelinefinder/grovelinefinder.cxx
@@ -23,6 +23,8 @@
  */
 
 #include <iostream>
+#include <string>
+#include <stdexcept>
 
 #include "grovelinefinder.h"
 
@@ -33,7 +35,8 @@ GroveLineFinder::GroveLineFinder(int pin)
 {
   if ( !(m_gpio = mraa_gpio_init(pin)) )
     {
-      cerr << __FUNCTION__ << ": mraa_gpio_init() failed" << endl;
+      throw std::invalid_argument(std::string(__FUNCTION__) +
+                                  ": mraa_gpio_init() failed, invalid pin?");
       return;
     }