check for NOMINMAX issue on windows (fixes #291)

a771e362 · Wenzel Jakob · a975ab25 · a771e362
Commit a771e362 authored Jul 19, 2016 by Wenzel Jakob
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include/pybind11/common.h
+5 -1

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--- a/include/pybind11/common.h
+++ b/include/pybind11/common.h
@@ -49,7 +49,11 @@
 #include <frameobject.h>
 #include <pythread.h>

-#ifdef isalnum
+#if defined(_WIN32) && (defined(min) || defined(max))
+#  error Macro clash with min and max -- define NOMINMAX when compiling your program on Windows
+#endif
+
+#if defined(isalnum)
 #  undef isalnum
 #  undef isalpha
 #  undef islower