From cd1dd2037cbe1d5f1362202d3127640406b468b8 Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@ost.ch>
Date: Mon, 13 Apr 2026 15:38:08 +0200
Subject: kstd: add basic format and format_to tests

---
 libs/kstd/include/kstd/bits/format/vformat.hpp |  6 +++---
 libs/kstd/include/kstd/string                  | 20 ++++++++++++++++++++
 2 files changed, 23 insertions(+), 3 deletions(-)

(limited to 'libs/kstd/include')

diff --git a/libs/kstd/include/kstd/bits/format/vformat.hpp b/libs/kstd/include/kstd/bits/format/vformat.hpp
index 69c7f33..4fec7dd 100644
--- a/libs/kstd/include/kstd/bits/format/vformat.hpp
+++ b/libs/kstd/include/kstd/bits/format/vformat.hpp
@@ -52,7 +52,7 @@ namespace kstd
 
       auto push(std::string_view text) -> void override
       {
-        m_output = std::ranges::copy(text, m_output);
+        m_output = std::ranges::copy(text, m_output).out;
       }
 
       auto push(char character) -> void override
@@ -75,7 +75,7 @@ namespace kstd
   auto format(format_string<std::type_identity_t<ArgumentTypes>...> format, ArgumentTypes &&... args) -> string
   {
     auto buffer = bits::format::string_writer{};
-    bits::format::vformat_to(buffer, format.str_view, std::forward<ArgumentTypes>(args)...);
+    bits::format::vformat_to(buffer, format.str_view, make_format_args(std::forward<ArgumentTypes>(args)...).args);
     return buffer.release();
   }
 
@@ -90,7 +90,7 @@ namespace kstd
                  ArgumentTypes &&... args) -> Output
   {
     auto buffer = bits::format::iterator_writer{iterator};
-    bits::format::vformat_to(buffer, format.str_view, std::forward<ArgumentTypes>(args)...);
+    bits::format::vformat_to(buffer, format.str_view, make_format_args(std::forward<ArgumentTypes>(args)...).args);
     return buffer.iterator();
   }
 
diff --git a/libs/kstd/include/kstd/string b/libs/kstd/include/kstd/string
index 4ce19ce..58c4a08 100644
--- a/libs/kstd/include/kstd/string
+++ b/libs/kstd/include/kstd/string
@@ -347,6 +347,26 @@ namespace kstd
     return !(lhs == rhs);
   }
 
+  [[nodiscard]] constexpr auto inline operator==(string const & lhs, char const * rhs) -> bool
+  {
+    return lhs.view() == std::string_view{rhs};
+  }
+
+  [[nodiscard]] constexpr auto inline operator!=(string const & lhs, char const * rhs) -> bool
+  {
+    return !(lhs == rhs);
+  }
+
+  [[nodiscard]] constexpr auto inline operator==(char const * lhs, string const & rhs) -> bool
+  {
+    return std::string_view{lhs} == rhs.view();
+  }
+
+  [[nodiscard]] constexpr auto inline operator!=(char const * lhs, string const & rhs) -> bool
+  {
+    return !(lhs == rhs);
+  }
+
   template<>
   struct formatter<string> : formatter<std::string_view>
   {
-- 
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