I keep messing up

src/Cafe/Filesystem/FSPath.cpp

@@ -0,0 +1,62 @@
+#include "FSPath.h"
+
+#ifndef BOOST_OS_UNIX
+FSPath& FSPath::operator/= (const FSPath & other)
+{
+	*this /= other;
+	return *this;
+}
+#else
+FSPath& FSPath::operator/= (const FSPath & other)
+{
+	// todo: implement caching.
+
+	// explore directories recursively and find the matching cases.
+	fs::path relPath = other.relative_path();
+	fs::path correctedPath = empty() ? other.root_path() : *this;
+
+	// helper function to convert a path's alphabet characters to lowercase.
+	auto static lowercase_path = [](fs::path const & path)
+	{
+		std::wstring string = path.wstring();
+		for (auto& i : string)
+		{
+			i = std::isalpha(i) ? std::tolower(i) : i;
+		}
+		return string;
+	};
+
+	bool found;
+	for (auto const &it : relPath)
+	{
+		found = false;
+		std::error_code listErr;
+		for (auto const& dirEntry : fs::directory_iterator{correctedPath, listErr})
+		{
+			fs::path entryName = dirEntry.path().filename();
+			if (lowercase_path(entryName) == lowercase_path(it))
+			{
+				correctedPath /= entryName;
+				found = true;
+				break;
+			}
+		}
+
+		// if we can't iterate directory, just copy the original case.
+		if(listErr)
+		{
+			correctedPath /= it;
+			found = true;
+		}
+
+		if (!found)
+			break;
+	}
+
+	if (found)
+		*this = correctedPath;
+
+	return *this;
+}
+
+#endif