From 384c05188c458072a6534b05ca9b4c633149d8b0 Mon Sep 17 00:00:00 2001
From: Olivier Parcollet <olivier.parcollet@cea.fr>
Date: Wed, 23 Apr 2014 18:47:17 +0200
Subject: [PATCH] exceptions handling : slight improve

- separate the stack trace from the error message for better python
  handling
- separate triqs::excption from triqs::runtime_error
---
 triqs/utility/exceptions.hpp | 21 ++++++++++++++-------
 1 file changed, 14 insertions(+), 7 deletions(-)

diff --git a/triqs/utility/exceptions.hpp b/triqs/utility/exceptions.hpp
index 2b7145a7..e1e0496d 100644
--- a/triqs/utility/exceptions.hpp
+++ b/triqs/utility/exceptions.hpp
@@ -30,19 +30,26 @@
 
 namespace triqs { 
 
- class runtime_error : public std::exception {
-  std::string acc;
+ class exception : public std::exception {
+  std::string acc, trace;
   public:
-  runtime_error() throw() :std::exception() {}
-  virtual ~runtime_error() throw() {}
-  template<typename T> runtime_error & operator  <<( T const & x) { std::stringstream f; f<<acc<<x; acc = f.str(); return *this;}
-  runtime_error & operator  <<( const char * mess ) { (*this) << std::string(mess); return *this;}// to limit code size
+  exception() throw() :std::exception() { trace = utility::stack_trace();}
+  virtual ~exception() throw() {}
+  template<typename T> exception & operator  <<( T const & x) { std::stringstream f; f<<acc<<x; acc = f.str(); return *this;}
+  exception & operator  <<( const char * mess ) { (*this) << std::string(mess); return *this;}// to limit code size
   virtual const char* what() const throw() { return acc.c_str();}
  };
+ 
+ class runtime_error : public exception {
+  public:
+  runtime_error() throw() : exception() {}
+  virtual ~runtime_error() throw() {}
+  template<typename T> runtime_error & operator  <<( T && x) { exception::operator<<(x); return *this; }
+ };
 
 }
 
-#define TRIQS_ERROR(CLASS,NAME) throw CLASS()<<" Triqs "<<NAME<<" at "<<__FILE__<< " : "<<__LINE__<<"\n\n Trace is :\n\n"<<triqs::utility::stack_trace()<<"\n"
+#define TRIQS_ERROR(CLASS,NAME) throw CLASS()<<" Triqs "<<NAME<<" at "<<__FILE__<< " : "<<__LINE__<<"\n\n"
 #define TRIQS_RUNTIME_ERROR TRIQS_ERROR(triqs::runtime_error,"runtime error")
 
 #endif