From 4327b34c841fd6d8fb6509757d5cab2717d35457 Mon Sep 17 00:00:00 2001
From: Brett <brettmaster1@gmail.com>
Date: Sun, 11 Aug 2024 13:33:40 -0400
Subject: [PATCH] check for func

---
 CMakeLists.txt         |  2 +-
 include/blt/std/meta.h | 12 +++++++++++-
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index cd8a335..f35ace0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.20)
 include(cmake/color.cmake)
-set(BLT_VERSION 0.18.27)
+set(BLT_VERSION 0.18.28)
 set(BLT_TEST_VERSION 0.0.1)
 
 set(BLT_TARGET BLT)
diff --git a/include/blt/std/meta.h b/include/blt/std/meta.h
index b21408c..f6a54b4 100644
--- a/include/blt/std/meta.h
+++ b/include/blt/std/meta.h
@@ -65,7 +65,7 @@ namespace blt::meta
     lambda_helper(Lambda) -> lambda_helper<Lambda, decltype(&Lambda::operator())>;
     
     // https://stackoverflow.com/questions/66397071/is-it-possible-to-check-if-overloaded-operator-for-type-or-class-exists
-    template<class T>
+    template<typename T>
     class is_streamable
     {
         private:
@@ -87,6 +87,16 @@ namespace blt::meta
     
     template<class T>
     inline constexpr bool is_streamable_v = is_streamable<T>::value;
+
+#define BLT_META_MAKE_FUNCTION_CHECK(FUNC, ...)\
+    template<typename T, typename = void> \
+    class has_func_##FUNC : public std::false_type \
+    {}; \
+    template<typename T> \
+    class has_func_##FUNC<T, std::void_t<decltype(std::declval<T>().drop(,##__VA_ARGS__))>> : public std::true_type \
+    {}; \
+    template<typename T> \
+    inline constexpr bool has_func_##FUNC##_v = has_func_##FUNC<T>::value; \
     
 }