small stuff

changelog

 Version 5.1.1
 - Added missing include <compare> in symmetry.hpp
+- Added empty() to matrix
 
 Version 5.1
 - New parser, optimised for speed

include/cif++/matrix.hpp

@@ -47,6 +47,8 @@ class matrix_expression
 	constexpr uint32_t dim_m() const { return static_cast<const M &>(*this).dim_m(); }
 	constexpr uint32_t dim_n() const { return static_cast<const M &>(*this).dim_n(); }
 
+	constexpr bool empty() const { return dim_m() == 0 or dim_n() == 0; }
+
 	constexpr auto &operator()(uint32_t i, uint32_t j)
 	{
 		return static_cast<M &>(*this).operator()(i, j);

include/cif++/utilities.hpp

@@ -34,7 +34,7 @@
 #define STDOUT_FILENO 1
 #endif
 
-#if _MSC_VER
+#if _WIN32
 #include <io.h>
 #define isatty _isatty
 #else

src/utilities.cpp

@@ -43,7 +43,7 @@
 #include <sstream>
 #include <thread>
 
-#if not defined(_MSC_VER)
+#if not defined(_WIN32)
 #include <sys/ioctl.h>
 #include <termios.h>
 #endif
@@ -68,7 +68,7 @@ std::string get_version_nr()
 
 // --------------------------------------------------------------------
 
-#ifdef _MSC_VER
+#ifdef _WIN32
 }
 #include <Windows.h>
 #include <libloaderapi.h>
@@ -411,11 +411,19 @@ struct rsrc_imp
 };
 } // namespace mrsrc
 
-#if _MSC_VER
+#if _WIN32
 
-extern "C" CIFPP_EXPORT const mrsrc::rsrc_imp *gResourceIndexDefault[1] = {};
-extern "C" CIFPP_EXPORT const char *gResourceDataDefault[1] = {};
-extern "C" CIFPP_EXPORT const char *gResourceNameDefault[1] = {};
+#if __MINGW32__
+
+extern "C" __attribute__((weak, alias("gResourceIndexDefault"))) const mrsrc::rsrc_imp gResourceIndex[];
+extern "C" __attribute__((weak, alias("gResourceDataDefault"))) const char gResourceData[];
+extern "C" __attribute__((weak, alias("gResourceNameDefault"))) const char gResourceName[];
+
+#else
+
+extern "C" const mrsrc::rsrc_imp *gResourceIndexDefault[1] = {};
+extern "C" const char *gResourceDataDefault[1] = {};
+extern "C" const char *gResourceNameDefault[1] = {};
 
 extern "C" const mrsrc::rsrc_imp gResourceIndex[];
 extern "C" const char gResourceData[];
@@ -425,6 +433,8 @@ extern "C" const char gResourceName[];
 #pragma comment(linker, "/alternatename:gResourceData=gResourceDataDefault")
 #pragma comment(linker, "/alternatename:gResourceName=gResourceNameDefault")
 
+#endif
+
 #else
 extern const __attribute__((weak)) mrsrc::rsrc_imp gResourceIndex[];
 extern const __attribute__((weak)) char gResourceData[];