From b43c009f77a2964882c9d8d88df195ef906338bc Mon Sep 17 00:00:00 2001
From: Dennis Brentjes <d.brentjes@gmail.com>
Date: Tue, 19 Jul 2016 14:29:40 +0200
Subject: No longer uses exceptions for control flow.

---
 binparse/output.hpp | 70 ++++++++++++++++++++++++++++++++++++-----------------
 1 file changed, 48 insertions(+), 22 deletions(-)

diff --git a/binparse/output.hpp b/binparse/output.hpp
index d942fca..4d17175 100644
--- a/binparse/output.hpp
+++ b/binparse/output.hpp
@@ -49,14 +49,23 @@ template <typename ValueType>
 std::ostream& operator<<(std::ostream& os, std::vector<ValueType> const& vec);
 
 template <typename Key, typename Value>
-std::ostream& operator<<(std::ostream& os, std::map<Key, Value> const& map) {
-	try {
-		indent scoped(os);
-		os << std::endl;
-		for(auto&& entry : map) {
-			os << entry.first << ": " << entry.second << std::endl;
-		}
-	} catch(std::bad_cast&) {
+std::ostream& operator<<(otreestream& os, std::map<Key, Value> const& map) {
+	indent scoped(os);
+	os << std::endl;
+	for(auto&& entry : map) {
+		os << entry.first << ": " << entry.second << std::endl;
+	}
+	
+	return os;
+}
+
+template <typename Key, typename Value>
+std::ostream& operator<<(std::ostream& os, std::map<Key, Value> const& map) {	
+	auto* tree_os = dynamic_cast<otreestream*>(&os);
+	
+	if(tree_os) {
+		*tree_os << map;
+	} else {
 		os << std::endl;
 		for(auto&& entry : map) {
 			os << entry.first << ": " << entry.second << std::endl;
@@ -66,25 +75,32 @@ std::ostream& operator<<(std::ostream& os, std::map<Key, Value> const& map) {
 	return os;
 }
 
+template <typename ValueType>
+std::ostream& operator<<(otreestream& os, std::vector<ValueType> const& vec) {
+	indent scoped(os);
+	os << std::endl;
+	for(auto&& entry : vec) {
+		os << entry << std::endl;
+	}
+	
+	return os;
+}
+
 template <typename ValueType>
 std::ostream& operator<<(std::ostream& os, std::vector<ValueType> const& vec) {
-	try {
-		indent scoped(os);
-		os << std::endl;
-		for(auto&& entry : vec) {
-			os << entry << std::endl;
-		}
-	} catch(std::bad_cast&) {
+	auto* tree_os = dynamic_cast<otreestream*>(&os);
+	if(tree_os) {
+		*tree_os << vec;
+	} else {
 		os << std::endl;
 		for(auto&& entry : vec) {
 			os << entry << std::endl;
 		}
 	}
+	
 	return os;
 }
 
-
-
 template<typename T>
 std::ostream& output_impl(std::ostream& os, T const&, indices<>) {
 	return os;
@@ -98,15 +114,25 @@ std::ostream& output_impl(std::ostream& os, T const& t, indices<I, Indices...>)
 	
 }
 
+template <typename T, typename std::enable_if<boost::fusion::traits::is_sequence<T>::value>::type*>
+std::ostream& operator<<(otreestream& os, T const& t) {
+	typedef typename build_indices<boost::fusion::result_of::size<T>::value>::type indices;
+	
+	indent scoped(os);
+	os << std::endl;
+	output_impl<T>(os, t, indices{});
+	
+	return os;
+}
+
 template <typename T, typename std::enable_if<boost::fusion::traits::is_sequence<T>::value>::type*>
 std::ostream& operator<<(std::ostream& os, T const& t) {
 	typedef typename build_indices<boost::fusion::result_of::size<T>::value>::type indices;
 	
-	try {
-		indent scoped(os);
-		os << std::endl;
-		output_impl<T>(os, t, indices{});
-	} catch(std::bad_cast&) {
+	auto* tree_os = dynamic_cast<otreestream*>(&os);
+	if(tree_os) {
+		*tree_os << t;
+	} else {
 		os << std::endl;
 		output_impl<T>(os, t, indices{});
 	}
-- 
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