From 2c92e07f337e42cf58970443f9de678f85a9b2a4 Mon Sep 17 00:00:00 2001
From: rtk0c <mail.tianyig@gmail.com>
Date: Thu, 19 Oct 2023 22:50:07 -0700
Subject: The great renaming: switch to "module style"

---
 src/brussel.common/OpaqueIterator.hpp | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 src/brussel.common/OpaqueIterator.hpp

(limited to 'src/brussel.common/OpaqueIterator.hpp')

diff --git a/src/brussel.common/OpaqueIterator.hpp b/src/brussel.common/OpaqueIterator.hpp
new file mode 100644
index 0000000..128cbc6
--- /dev/null
+++ b/src/brussel.common/OpaqueIterator.hpp
@@ -0,0 +1,31 @@
+#pragma once
+
+template <typename T>
+class IOpaqueIterator {
+public:
+	virtual ~IOpaqueIterator() = default;
+	virtual bool HasNext() const = 0;
+	virtual T Next() = 0;
+};
+
+template <typename TContainer>
+class ContainerOpaqueIterator : public IOpaqueIterator<typename TContainer::reference_type> {
+private:
+	typename TContainer::iterator mIter;
+	typename TContainer::const_iterator mEnd;
+
+public:
+	ContainerOpaqueIterator(TContainer& container)
+		: mIter{ container.begin() }
+		, mEnd{ container.end() } {}
+
+	virtual bool HasNext() const override {
+		return mIter != mEnd;
+	}
+
+	virtual typename TContainer::reference_type Next() override {
+		auto result = *mIter;
+		++mIter;
+		return result;
+	}
+};
-- 
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