Fixed test name-demangler relying on faulty string information.

Fortune for opaque_handle's current commit: Future small blessing − 末小吉

src/main.cpp

@@ -34,22 +34,21 @@ static std::string demangle_name(const char* mangled)
 		int _status;
 	};
 
-	size_t len;
-	int status;
-	char * demangled = abi::__cxa_demangle(mangled, nullptr, &len, &status);
+	int status = 0;
+	char * demangled = abi::__cxa_demangle(mangled, nullptr, nullptr /* This never seems to be even close to accurate, it's always off by a long shot and idk why? */, &status);
 
-	const auto c_str_to_string = [len](char* str)
+	auto c_str_to_string = [](char* str)
 			noexcept(std::is_nothrow_constructible_v<std::string, const char*, size_t>) 
 	{
 		const auto _free = [&]() { free(static_cast<void*>(str)); };
 
 		if constexpr(std::is_nothrow_constructible_v<std::string, const char*, size_t>) {
-			std::string v{str, len};
+			std::string v{str};
 			_free();
 			return v;
 		} else {
 			try {
-				std::string v{str, len};
+				std::string v{str};
 				_free();
 				return v;
 			} catch(...) {
@@ -67,7 +66,8 @@ static std::string demangle_name(const char* mangled)
 
 inline static std::string demangle_name(const std::string& mangled)
 {
-	return demangle_name(mangled.c_str());
+	const auto& tmp = mangled;
+	return demangle_name(tmp.c_str());
 }
 
 static inline void s_puts(const auto& string, FILE* to = nullptr)
@@ -87,12 +87,14 @@ static void print_name(const std::type_info& type)
 	const char* name = type.name();
 	s_puts("type holds: ");
 	try {
-		s_puts(demangle_name(name));
-		s_puts("\n");
-	} catch(demangle_failed& err) {
-		s_puts("<mangled> ");
+		const auto dm = demangle_name(name);
+		s_puts("`");
+		s_puts(dm);
+		s_puts("`\n");
+	} catch(const demangle_failed& err) {
+		s_puts("<mangled> `");
 		s_puts(name);
-		s_puts("\n");
+		s_puts("`\n");
 		
 		s_puts("Failed to demangle name: ", stderr);
 		s_puts(err.what(), stderr);