From 37122edba1ee18cdab879681d14126e0497608d6 Mon Sep 17 00:00:00 2001
From: Jarryd Beck <jarrydb@cse.unsw.edu.au>
Date: Sun, 28 Sep 2014 21:41:19 +1000
Subject: [PATCH] writing parser

---
 src/cxxopts.cpp |  3 +++
 src/cxxopts.hpp | 18 ++++++++++++++++++
 2 files changed, 21 insertions(+), 0 deletions(-)

diff --git a/src/cxxopts.cpp b/src/cxxopts.cpp
index fb43c25..fa6146c 100644
--- a/src/cxxopts.cpp
+++ b/src/cxxopts.cpp
@@ -91,6 +91,7 @@ Options::parse(int& argc, char**& argv)
 
           if (iter == m_short.end())
           {
+            throw option_not_exists_exception(name);
             //argument not found
           }
 
@@ -111,6 +112,7 @@ Options::parse(int& argc, char**& argv)
             else
             {
               //error
+              throw option_requires_argument_exception(name);
             }
           }
         }
@@ -123,6 +125,7 @@ Options::parse(int& argc, char**& argv)
 
         if (iter == m_long.end())
         {
+          throw option_not_exists_exception(name);
         }
 
         auto opt = iter->second;
diff --git a/src/cxxopts.hpp b/src/cxxopts.hpp
index f45cf0b..90b4148 100644
--- a/src/cxxopts.hpp
+++ b/src/cxxopts.hpp
@@ -98,6 +98,24 @@ namespace cxxopts
     }
   };
 
+  class option_not_exists_exception : public OptionParseException
+  {
+    public:
+    option_not_exists_exception(const std::string& option)
+    : OptionParseException(u8"Option ‘" + option + u8"’ does not exist")
+    {
+    }
+  };
+
+  class option_requires_argument_exception : public OptionParseException
+  {
+    public:
+    option_requires_argument_exception(const std::string& option)
+    : OptionParseException(u8"Option ‘" + option + u8"’ requires an argument")
+    {
+    }
+  };
+
   class OptionAdder;
 
   class OptionDetails
--
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