simplify check_precondition

Author: Yuuichi Asahi

common/src/KokkosFFT_utils.hpp

@@ -8,7 +8,7 @@
 #include <Kokkos_Core.hpp>
 #include <vector>
 #include <set>
-#include <string>
+#include <sstream>
 #include <algorithm>
 #include <numeric>
 #include "KokkosFFT_traits.hpp"
@@ -20,38 +20,38 @@
                                       __FUNCTION__)
 #else
 #include <source_location>
-#define KOKKOSFFT_EXPECTS(expression, msg)               \
-  KokkosFFT::Impl::check_precondition((expression), msg, \
-                                      std::source_location::current())
+#define KOKKOSFFT_EXPECTS(expression, msg)                            \
+  KokkosFFT::Impl::check_precondition(                                \
+      (expression), msg, std::source_location::current().file_name(), \
+      std::source_location::current().line(),                         \
+      std::source_location::current().function_name(),                \
+      std::source_location::current().column())
 #endif
 
 namespace KokkosFFT {
 namespace Impl {
 
-#if defined(KOKKOS_ENABLE_CXX17)
-inline void check_precondition(const bool expression, const std::string& msg,
-                               const char* file_name, int line,
-                               const char* function_name) {
+inline void check_precondition(const bool expression,
+                               [[maybe_unused]] const std::string& msg,
+                               [[maybe_unused]] const char* file_name, int line,
+                               [[maybe_unused]] const char* function_name,
+                               [[maybe_unused]] const int column = -1) {
+  // Quick return if possible
+  if (expression) return;
+
   std::stringstream ss("file: ");
-  ss << file_name << '(' << line << ") `" << function_name << "`: " << msg
-     << '\n';
-  if (!expression) {
-    throw std::runtime_error(ss.str());
+  if (column == -1) {
+    // For C++ 17
+    ss << file_name << '(' << line << ") `" << function_name << "`: " << msg
+       << '\n';
+  } else {
+    // For C++ 20 and later
+    ss << file_name << '(' << line << ':' << column << ") `" << function_name
+       << "`: " << msg << '\n';
   }
+  throw std::runtime_error(ss.str());
 }
-#else
-inline void check_precondition(const bool expression, const std::string& msg,
-                               std::source_location location) {
-  std::stringstream ss("file: ");
-  ss << location.file_name() << '(' << location.line() << ':'
-     << location.column() << ") `" << location.function_name() << "`: " << msg
-     << '\n';
 
-  if (!expression) {
-    throw std::runtime_error(ss.str());
-  }
-}
-#endif
 template <typename ViewType>
 auto convert_negative_axis(ViewType, int _axis = -1) {
   static_assert(Kokkos::is_view<ViewType>::value,