From c61de194f49c47880f8a886c88dcf044f893861a Mon Sep 17 00:00:00 2001
From: Adrian Kummerländer
Date: Thu, 10 Apr 2014 20:26:20 +0200
Subject: Added operator- member implementation and improved test cases *
 operator- takes a reference to a const std::string::const_iterator and as
 such enables determining the actual position of a codepoint within a string *
 ranged for loops in test cases now take the iterator value by rvalue
 reference instead of by value

---
 src/codepoint_iterator.cc | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src/codepoint_iterator.cc')

diff --git a/src/codepoint_iterator.cc b/src/codepoint_iterator.cc
index b2f6d81..59cb23b 100644
--- a/src/codepoint_iterator.cc
+++ b/src/codepoint_iterator.cc
@@ -34,6 +34,11 @@ bool CodepointIterator::operator!=(
 	return this->iterator_ != src;
 }
 
+std::ptrdiff_t CodepointIterator::operator-(
+	const std::string::const_iterator& src) const {
+	return this->iterator_ - src;
+}
+
 char32_t CodepointIterator::operator*() {
 	std::uint8_t  currByte  = *(this->iterator_);
 	char32_t codePoint      = 0;
-- 
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