From b762e3faec66e4401eab9c1aa01ea9407dcaa5c7 Mon Sep 17 00:00:00 2001
From: eamanu <eamanu@eamanu.com>
Date: Mon, 24 Jun 2019 19:11:53 -0300
Subject: [PATCH] Create a exception to thow when Options not exists

When the user try to get a option that not exist, cxxopt library
throw a std::domain_error, that make a segfaults. See #185.

On this PR I create a new Exception class from OptionParseException
that is throw when this situation occur. This avoid the SegFaults
error.
---
 include/cxxopts.hpp | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/include/cxxopts.hpp b/include/cxxopts.hpp
index 1381ab3..f19b2cc 100644
--- a/include/cxxopts.hpp
+++ b/include/cxxopts.hpp
@@ -394,6 +394,15 @@ namespace cxxopts
     }
   };
 
+  class option_value_not_exists_exception : public OptionParseException
+  {
+    public:
+    option_value_not_exists_exception()
+    : OptionParseException("Option value does not exist")
+    {
+    }
+  };
+
   class missing_argument_exception : public OptionParseException
   {
     public:
@@ -1068,7 +1077,7 @@ namespace cxxopts
     as() const
     {
       if (m_value == nullptr) {
-        throw std::domain_error("No value");
+        throw option_value_not_exists_exception();
       }
 
 #ifdef CXXOPTS_NO_RTTI