From 9371a3208eeb59c2728193305580f8a63776f3c6 Mon Sep 17 00:00:00 2001
From: Eugen Betke <maee@ab6-200.bullx>
Date: Wed, 1 Mar 2023 13:27:41 +0000
Subject: [PATCH] ECC-1467: typename check in templates

---
 src/grib_accessor_class_data_ccsds_packing.h    | 3 +++
 src/grib_accessor_class_data_complex_packing.h  | 1 +
 src/grib_accessor_class_data_g22order_packing.h | 2 ++
 3 files changed, 6 insertions(+)

diff --git a/src/grib_accessor_class_data_ccsds_packing.h b/src/grib_accessor_class_data_ccsds_packing.h
index 75b13ac29..4edc152d3 100644
--- a/src/grib_accessor_class_data_ccsds_packing.h
+++ b/src/grib_accessor_class_data_ccsds_packing.h
@@ -1,5 +1,7 @@
 #pragma once
+
 #include "grib_api_internal_cpp.h"
+#include <type_traits>
 
 #if defined(HAVE_LIBAEC) || defined(HAVE_AEC)
 #include <libaec.h>
@@ -42,6 +44,7 @@ public:
 template <typename T>
 int GribAccessorDataCcsdsPacking<T>::unpack(grib_accessor* a, T* val, size_t* len)
 {
+    static_assert(std::is_floating_point<T>::value, "Requires floating point numbers");
     grib_accessor_data_ccsds_packing* self = (grib_accessor_data_ccsds_packing*)a;
     grib_handle* hand = grib_handle_of_accessor(a);
 
diff --git a/src/grib_accessor_class_data_complex_packing.h b/src/grib_accessor_class_data_complex_packing.h
index be7b7287f..c490f8218 100644
--- a/src/grib_accessor_class_data_complex_packing.h
+++ b/src/grib_accessor_class_data_complex_packing.h
@@ -51,6 +51,7 @@ public:
 template <typename T>
 int GribAccessorClassDataComplexPacking<T>::unpack(grib_accessor* a, T* val, size_t* len)
 {
+    static_assert(std::is_floating_point<T>::value, "Requires floating point numbers");
     grib_accessor_data_complex_packing* self = (grib_accessor_data_complex_packing*)a;
     grib_handle* gh                          = grib_handle_of_accessor(a);
 
diff --git a/src/grib_accessor_class_data_g22order_packing.h b/src/grib_accessor_class_data_g22order_packing.h
index 70a6f612b..70ac1a63a 100644
--- a/src/grib_accessor_class_data_g22order_packing.h
+++ b/src/grib_accessor_class_data_g22order_packing.h
@@ -1,6 +1,7 @@
 #pragma once
 
 #include "grib_api_internal.h"
+#include <type_traits>
 
 typedef struct grib_accessor_data_g22order_packing
 {
@@ -45,6 +46,7 @@ public:
 template <typename T>
 int GribAccessorDataG22orderPacking<T>::unpack(grib_accessor* a, T* val, size_t* len)
 {
+    static_assert(std::is_floating_point<T>::value, "Requires floating points numbers");
     grib_accessor_data_g22order_packing* self = (grib_accessor_data_g22order_packing*)a;
 
     size_t i    = 0;