commit 8384b240a8c6f05981b38fa4e1423d5515c05dab
Author: Avril <flanchan@cumallover.me>
Date:   Thu Dec 3 17:11:28 2020 +0000

    initial commit

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..aff2160
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+test/test
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..fa98b55
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,13 @@
+
+
+.PHONY: test
+test: test/test
+
+test/test: test/test.cpp
+	$(CXX) -I. --std=c++20 $< -o $@
+	if strings $@ | grep Hello; then exit 1; fi
+	strings $@ | grep bOFFE >> /dev/null
+	@echo "Passed."
+
+clean:
+	rm -f test/test
diff --git a/cfrob.hpp b/cfrob.hpp
new file mode 100644
index 0000000..c9c84dc
--- /dev/null
+++ b/cfrob.hpp
@@ -0,0 +1,34 @@
+#pragma once
+
+namespace frob
+{
+	using u8 = unsigned char;
+	constexpr u8 rot13(u8 i)
+	{
+		return i ^ (u8)42;
+	}
+
+	template<std::size_t N>
+	struct cfrob
+	{
+		char out[N]{};
+		constexpr cfrob(const char (&sz)[N])
+		{
+			for(std::size_t i=0;i<N-1;i++)
+				out[i] = rot13((u8)sz[i]);
+			out[N-1] = 0;
+		}
+	};
+	template<>
+	struct cfrob<0>
+	{
+		char out[0]{};
+	};
+}
+
+template<frob::cfrob C>
+constexpr auto operator "" _frob()
+{
+	return C.out;
+}
+
diff --git a/test/test.cpp b/test/test.cpp
new file mode 100644
index 0000000..f728bf0
--- /dev/null
+++ b/test/test.cpp
@@ -0,0 +1,18 @@
+#include <iostream>
+#include <cstring>
+
+#include <cfrob.hpp>
+
+const auto str = "Hello world."_frob;
+
+int main()
+{
+	char* str2 = strdup(str);
+	memfrob(str2, strlen(str));
+
+	std::cout << str << std::endl;
+	std::cout << str2 << std::endl;	
+	free(str2);
+
+	return 0;
+}