error: add more tests

1 files changed, 7 insertions, 6 deletions

diff --git a/nihil.std/nihil.std.ccm b/nihil.std/nihil.std.ccm
index effbf8a..349ab95 100644
--- a/nihil.std/nihil.std.ccm
+++ b/nihil.std/nihil.std.ccm
@@ -166,7 +166,6 @@ using std::uint64_t;
 // <cstdlib>
 using std::exit;
 using std::quick_exit;
-using std::quick_exit;
 
 // <cstdio>
 using std::FILE;
@@ -208,28 +207,30 @@ using std::format_args;
 using std::format_context;
 using std::format_error;
 using std::format_kind;
-using std::format;
 using std::format_to;
 using std::format_to_n;
+using std::format_to_n;
 using std::format_to_n_result;
-using std::formattable;
 using std::formatted_size;
 using std::formatter;
-using std::make_format_args;
-using std::make_wformat_args;
+using std::formatter;
 using std::range_format;
 using std::range_formatter;
+using std::runtime_format;
 using std::visit_format_arg;
 using std::wformat_parse_context;
 using std::format_error;
 using std::runtime_format;
 
 // <functional>
+using std::cref;
 using std::function;
-using std::invoke;
 using std::ref;
 using std::cref;
 using std::reference_wrapper;
+using std::invoke;
+using std::invoke_result;
+using std::invoke_result_t;
 
 // <iostream>
 using std::cerr;