From 8042003647b50e9fddfe500677a132130449d69e Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@ost.ch>
Date: Thu, 18 Dec 2025 14:00:03 +0100
Subject: kapi/cio: implement formatted printing

---
 kapi/include/kapi/cio.hpp | 55 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 55 insertions(+)

(limited to 'kapi/include')

diff --git a/kapi/include/kapi/cio.hpp b/kapi/include/kapi/cio.hpp
index 071e6cb..98c715b 100644
--- a/kapi/include/kapi/cio.hpp
+++ b/kapi/include/kapi/cio.hpp
@@ -3,8 +3,12 @@
 
 #include "kapi/cio/output_device.hpp"  // IWYU pragma: export
 
+#include <kstd/format>
+
+#include <array>
 #include <optional>
 #include <string_view>
+#include <type_traits>
 
 namespace teachos::cio
 {
@@ -46,6 +50,57 @@ namespace teachos::cio
   //!
   //! @param text The error text to print.
   auto println_error(std::string_view text) -> void;
+
+  template<typename... Args>
+  // NOLINTNEXTLINE(cppcoreguidelines-missing-std-forward)
+  auto print(kstd::format_string<std::type_identity_t<Args>...> format, Args &&... args) -> void
+  {
+    auto vprint(std::string_view format, kstd::format_args args) -> void;
+    auto arguments = std::array{
+      kstd::format_arg{&args, kstd::format_dispatcher<std::remove_cvref_t<Args>>}
+      ...
+    };
+    vprint(format.str, kstd::format_args{arguments.data(), sizeof...(Args)});
+  }
+
+  template<typename... Args>
+  // NOLINTNEXTLINE(cppcoreguidelines-missing-std-forward)
+  auto println(kstd::format_string<std::type_identity_t<Args>...> format, Args &&... args) -> void
+  {
+    auto vprint(std::string_view format, kstd::format_args args) -> void;
+    auto arguments = std::array{
+      kstd::format_arg{&args, kstd::format_dispatcher<std::remove_cvref_t<Args>>}
+      ...
+    };
+    vprint(format.str, kstd::format_args{arguments.data(), sizeof...(Args)});
+    println("");
+  }
+
+  template<typename... Args>
+  // NOLINTNEXTLINE(cppcoreguidelines-missing-std-forward)
+  auto print_error(kstd::format_string<std::type_identity_t<Args>...> format, Args &&... args) -> void
+  {
+    auto vprint_error(std::string_view format, kstd::format_args args) -> void;
+    auto arguments = std::array{
+      kstd::format_arg{&args, kstd::format_dispatcher<std::remove_cvref_t<Args>>}
+      ...
+    };
+    vprint_error(format.str, kstd::format_args{arguments.data(), sizeof...(Args)});
+  }
+
+  template<typename... Args>
+  // NOLINTNEXTLINE(cppcoreguidelines-missing-std-forward)
+  auto println_error(kstd::format_string<std::type_identity_t<Args>...> format, Args &&... args) -> void
+  {
+    auto vprint_error(std::string_view format, kstd::format_args args) -> void;
+    auto arguments = std::array{
+      kstd::format_arg{&args, kstd::format_dispatcher<std::remove_cvref_t<Args>>}
+      ...
+    };
+    vprint_error(format.str, kstd::format_args{arguments.data(), sizeof...(Args)});
+    println_error("");
+  }
+
 }  // namespace teachos::cio
 
 #endif
-- 
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