no warnings on -Wall

Makefile

@@ -4,9 +4,11 @@
 test: test/test
 
 test/test: test/test.cpp
-	$(CXX) -I. --std=c++20 $< -o $@
+	$(CXX) -I. --std=c++20 -Wall -pedantic $< -o $@
 	if strings $@ | grep Hello; then exit 1; fi
+	./$@
 	strings $@ | grep bOFFE >> /dev/null
+	@echo ""
 	@echo "Passed."
 
 clean:

cfrob.hpp

@@ -9,6 +9,7 @@ namespace frob
 	}
 
 	template<std::size_t N>
+		requires(N > 0)
 	struct cfrob
 	{
 		char out[N]{};
@@ -19,11 +20,6 @@ namespace frob
 			out[N-1] = 0;
 		}
 	};
-	template<>
-	struct cfrob<0>
-	{
-		char out[0]{};
-	};
 }
 
 template<frob::cfrob C>

test/test.cpp

@@ -3,7 +3,12 @@
 
 #include <cfrob.hpp>
 
-const auto str = "Hello world."_frob;
+// Can be stored as `const char` array with compile-time size for optimal use.
+const auto str			= "Hello world."_frob; 
+constexpr const char* str2	= "Hello world."_frob;
+
+// Can also be stored as normal `const char*` string constant pointer.
+const char* str3		= "Hello world."_frob;
 
 int main()
 {