From a49e357f4c8a989925194833c78a0a855f215f72 Mon Sep 17 00:00:00 2001
From: Cynopolis <quinn.henthorne@gmail.com>
Date: Thu, 13 Aug 2026 11:33:19 -0400
Subject: [PATCH] Added additional constraints to list instantiation

---
 CMakeLists.txt | 2 +-
 src/Matrix.cpp | 3 ++-
 src/Matrix.hpp | 8 ++++++--
 3 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c4f6270..62bd4f4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,7 +4,7 @@ project(Vector3D)
 add_subdirectory(src)
 add_subdirectory(unit-tests)
 
-set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD 17)
 
 add_compile_options(-Wall -Wextra -Wpedantic)
 add_compile_options (-fdiagnostics-color=always)
diff --git a/src/Matrix.cpp b/src/Matrix.cpp
index f129fde..a4ea714 100644
--- a/src/Matrix.cpp
+++ b/src/Matrix.cpp
@@ -20,7 +20,8 @@ Matrix<rows, columns>::Matrix(const std::array<float, rows * columns> &array) {
 }
 
 template <uint8_t rows, uint8_t columns>
-template <typename... Args>
+template <typename... Args,
+          std::enable_if_t<(std::is_arithmetic_v<Args> && ...), int>>
 Matrix<rows, columns>::Matrix(Args... args) {
   constexpr uint16_t arraySize{static_cast<uint16_t>(rows) *
                                static_cast<uint16_t>(columns)};
diff --git a/src/Matrix.hpp b/src/Matrix.hpp
index d4b1798..1c28a08 100644
--- a/src/Matrix.hpp
+++ b/src/Matrix.hpp
@@ -3,6 +3,7 @@
 #include <array>
 #include <cstdint>
 #include <string>
+#include <type_traits>
 
 // TODO: Add a function to calculate eigenvalues/vectors
 // TODO: Add a function to compute RREF
@@ -29,9 +30,12 @@ public:
   Matrix(const Matrix<rows, columns> &other);
 
   /**
-   * @brief Initialize a matrix directly with any number of arguments
+   * @brief Initialize a matrix directly with scalar values
+   * Uses SFINAE to only accept arithmetic types (int, float, double, etc.)
    */
-  template <typename... Args> Matrix(Args... args);
+  template <typename... Args,
+            std::enable_if_t<(std::is_arithmetic_v<Args> && ...), int> = 0>
+  Matrix(Args... args);
 
   /**
    * @brief Create an identity matrix