From 57f9f7331cb73a128752fce070ecbe18dcb9843b Mon Sep 17 00:00:00 2001
From: lisyarus <lisyarus@gmail.com>
Date: Fri, 4 Apr 2025 21:07:19 +0300
Subject: [PATCH] Add std::format formatters for basic math types

---
 libs/math/include/psemek/math/box.hpp        | 32 ++++++++++++++++++++
 libs/math/include/psemek/math/interval.hpp   | 20 ++++++++++++
 libs/math/include/psemek/math/point.hpp      | 27 +++++++++++++++++
 libs/math/include/psemek/math/quaternion.hpp | 21 +++++++++++++
 libs/math/include/psemek/math/vector.hpp     | 26 ++++++++++++++++
 5 files changed, 126 insertions(+)

diff --git a/libs/math/include/psemek/math/box.hpp b/libs/math/include/psemek/math/box.hpp
index 18038144..09aa56f9 100644
--- a/libs/math/include/psemek/math/box.hpp
+++ b/libs/math/include/psemek/math/box.hpp
@@ -5,6 +5,7 @@
 #include <psemek/math/point.hpp>
 
 #include <iostream>
+#include <format>
 
 namespace psemek::math
 {
@@ -348,3 +349,34 @@ namespace psemek::math
 	}
 
 }
+
+namespace std
+{
+
+	template <typename T, std::size_t N, typename Char>
+	struct formatter<::psemek::math::box<T, N>, Char>
+	{
+		constexpr auto parse(std::format_parse_context & ctx)
+		{
+			return ctx.begin();
+		}
+
+		auto format(::psemek::math::point<T, N> const & p, std::format_context & ctx) const
+		{
+			if constexpr (N == 0)
+			{
+				return std::format_to(ctx.out(), "()");
+			}
+			else
+			{
+				auto out = ctx.out();
+				out = std::format_to(out, "({}", p[0]);
+				for (std::size_t i = 1; i < p.dimension(); ++i)
+					out = std::format_to(out, ", {}", p[i]);
+				out = std::format_to(out, ")");
+				return out;
+			}
+		}
+	};
+
+}
diff --git a/libs/math/include/psemek/math/interval.hpp b/libs/math/include/psemek/math/interval.hpp
index 1cff3ffa..d2a55d4e 100644
--- a/libs/math/include/psemek/math/interval.hpp
+++ b/libs/math/include/psemek/math/interval.hpp
@@ -4,6 +4,7 @@
 #include <limits>
 #include <type_traits>
 #include <cmath>
+#include <format>
 
 namespace psemek::math
 {
@@ -302,3 +303,22 @@ namespace psemek::math
 	}
 
 }
+
+namespace std
+{
+
+	template <typename T, typename Char>
+	struct formatter<::psemek::math::interval<T>, Char>
+	{
+		constexpr auto parse(std::format_parse_context & ctx)
+		{
+			return ctx.begin();
+		}
+
+		auto format(::psemek::math::interval<T> const & i, std::format_context & ctx) const
+		{
+			return std::format_to(ctx.out(), "[{} .. {}]", i.min, i.max);
+		}
+	};
+
+}
diff --git a/libs/math/include/psemek/math/point.hpp b/libs/math/include/psemek/math/point.hpp
index 461d6cec..7cb5d2bf 100644
--- a/libs/math/include/psemek/math/point.hpp
+++ b/libs/math/include/psemek/math/point.hpp
@@ -6,6 +6,7 @@
 #include <psemek/math/vector.hpp>
 
 #include <iostream>
+#include <format>
 
 namespace psemek::math
 {
@@ -232,4 +233,30 @@ namespace std
 		}
 	};
 
+	template <typename T, std::size_t N, typename Char>
+	struct formatter<::psemek::math::point<T, N>, Char>
+	{
+		constexpr auto parse(std::format_parse_context & ctx)
+		{
+			return ctx.begin();
+		}
+
+		auto format(::psemek::math::point<T, N> const & p, std::format_context & ctx) const
+		{
+			if constexpr (N == 0)
+			{
+				return std::format_to(ctx.out(), "()");
+			}
+			else
+			{
+				auto out = ctx.out();
+				out = std::format_to(out, "({}", p[0]);
+				for (std::size_t i = 1; i < p.dimension(); ++i)
+					out = std::format_to(out, ", {}", p[i]);
+				out = std::format_to(out, ")");
+				return out;
+			}
+		}
+	};
+
 }
diff --git a/libs/math/include/psemek/math/quaternion.hpp b/libs/math/include/psemek/math/quaternion.hpp
index a86b7303..3b644990 100644
--- a/libs/math/include/psemek/math/quaternion.hpp
+++ b/libs/math/include/psemek/math/quaternion.hpp
@@ -5,6 +5,8 @@
 #include <psemek/math/matrix.hpp>
 #include <psemek/math/interval.hpp>
 
+#include <format>
+
 namespace psemek::math
 {
 
@@ -338,3 +340,22 @@ namespace psemek::math
 	}
 
 }
+
+namespace std
+{
+
+	template <typename T, typename Char>
+	struct formatter<::psemek::math::quaternion<T>, Char>
+	{
+		constexpr auto parse(std::format_parse_context & ctx)
+		{
+			return ctx.begin();
+		}
+
+		auto format(::psemek::math::quaternion<T> const & q, std::format_context & ctx) const
+		{
+			return std::format_to(ctx.out(), "{}", q.coords);
+		}
+	};
+
+}
diff --git a/libs/math/include/psemek/math/vector.hpp b/libs/math/include/psemek/math/vector.hpp
index a3c79def..5c9d9709 100644
--- a/libs/math/include/psemek/math/vector.hpp
+++ b/libs/math/include/psemek/math/vector.hpp
@@ -522,4 +522,30 @@ namespace std
 		}
 	};
 
+	template <typename T, std::size_t N, typename Char>
+	struct formatter<::psemek::math::vector<T, N>, Char>
+	{
+		constexpr auto parse(std::format_parse_context & ctx)
+		{
+			return ctx.begin();
+		}
+
+		auto format(::psemek::math::vector<T, N> const & v, std::format_context & ctx) const
+		{
+			if constexpr (N == 0)
+			{
+				return std::format_to(ctx.out(), "()");
+			}
+			else
+			{
+				auto out = ctx.out();
+				out = std::format_to(out, "({}", v[0]);
+				for (std::size_t i = 1; i < v.dimension(); ++i)
+					out = std::format_to(out, ", {}", v[i]);
+				out = std::format_to(out, ")");
+				return out;
+			}
+		}
+	};
+
 }