From eca23d70c9e2c0519125f2fd92c212d3c94f7736 Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Sun, 5 Oct 2014 21:20:48 +0300
Subject: [PATCH] Make FS::Path::Iterator meet forward iterator requirements

---
 source/fs/path.cpp | 18 +++++++++++++-----
 source/fs/path.h   | 14 +++++++++++++-
 2 files changed, 26 insertions(+), 6 deletions(-)

diff --git a/source/fs/path.cpp b/source/fs/path.cpp
index 4db7f0c..0fe95d6 100644
--- a/source/fs/path.cpp
+++ b/source/fs/path.cpp
@@ -222,7 +222,9 @@ Path::Iterator::Iterator(const Path &p, bool e):
 	path(&p),
 	iter(e ? path->separators.end() : path->separators.begin()),
 	end(e || path->path.empty())
-{ }
+{
+	update();
+}
 
 Path::Iterator &Path::Iterator::operator++()
 {
@@ -234,6 +236,7 @@ Path::Iterator &Path::Iterator::operator++()
 		if(path->path.size()==1 && path->separators.size()==1)
 			end = true;
 	}
+	update();
 	return *this;
 }
 
@@ -247,13 +250,17 @@ Path::Iterator &Path::Iterator::operator--()
 	}
 	else if(iter!=path->separators.begin())
 		--iter;
+	update();
 	return *this;
 }
 
-string Path::Iterator::operator*() const
+void Path::Iterator::update()
 {
 	if(end)
-		throw logic_error("Path::Iterator::operator*");
+	{
+		current.clear();
+		return;
+	}
 
 	string::size_type start = 0;
 	if(iter!=path->separators.begin())
@@ -267,8 +274,9 @@ string Path::Iterator::operator*() const
 		slash = *iter;
 
 	if(slash==0)
-		return path->path.substr(start, 1);
-	return path->path.substr(start, slash-start);
+		current = path->path.substr(start, 1);
+	else
+		current = path->path.substr(start, slash-start);
 }
 
 } // namespace FS
diff --git a/source/fs/path.h b/source/fs/path.h
index 5d0a5d3..3cbfb16 100644
--- a/source/fs/path.h
+++ b/source/fs/path.h
@@ -36,10 +36,18 @@ private:
 public:
 	class Iterator
 	{
+	public:
+		typedef PositionArray::difference_type difference_type;
+		typedef const std::string value_type;
+		typedef const std::string *pointer;
+		typedef const std::string &reference;
+		typedef std::input_iterator_tag iterator_category;
+
 	private:
 		const Path *path;
 		PositionArray::const_iterator iter;
 		bool end;
+		std::string current;
 
 		Iterator(const Path &, bool = false);
 	public:
@@ -47,10 +55,14 @@ public:
 		static Iterator at_end(const Path &p) { return Iterator(p, true); }
 
 		Iterator &operator++();
+		Iterator operator++(int) { Iterator i = *this; ++*this; return i; }
 		Iterator &operator--();
-		std::string operator*() const;
+		const std::string &operator*() const { return current; }
+		const std::string *operator->() const { return &current; }
 		bool operator==(const Iterator &i) const { return (iter==i.iter && end==i.end); }
 		bool operator!=(const Iterator &i) const { return !(*this==i); }
+	private:
+		void update();
 	};
 
 private:
-- 
2.43.0