fix msvc

vendor/mruby-compiler2/include/mrc_throw.h

@@ -0,0 +1,57 @@
+/**
+** @file mruby/throw.h - mruby exception throwing handler
+**
+** See Copyright Notice in mruby.h
+*/
+
+#ifndef MRC_THROW_H
+#define MRC_THROW_H
+
+#if defined(MRC_USE_CXX_ABI) && !defined(__cplusplus)
+#  error Trying to use C++ exception handling in C code
+#endif
+
+#if defined(MRC_USE_CXX_EXCEPTION)
+
+# if defined(__cplusplus)
+
+#define MRC_TRY(buf) try {
+#define MRC_CATCH(buf) } catch(mrc_jmpbuf *e) { if (e != (buf)) { throw e; }
+#define MRC_END_EXC(buf)  }
+
+#define MRC_THROW(buf) throw(buf)
+typedef void *mrc_jmpbuf_impl;
+
+# else
+# error "need to be compiled with C++ compiler"
+# endif  /* __cplusplus */
+
+#else
+
+#include <setjmp.h>
+
+#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
+#define MRC_SETJMP _setjmp
+#define MRC_LONGJMP _longjmp
+#elif defined(__MINGW64__) && defined(__GNUC__) && __GNUC__ >= 4
+#define MRC_SETJMP __builtin_setjmp
+#define MRC_LONGJMP __builtin_longjmp
+#else
+#define MRC_SETJMP setjmp
+#define MRC_LONGJMP longjmp
+#endif
+
+#define MRC_TRY(buf) if (MRC_SETJMP((buf)->impl) == 0) {
+#define MRC_CATCH(buf) } else {
+#define MRC_END_EXC(buf) }
+
+#define MRC_THROW(buf) MRC_LONGJMP((buf)->impl, 1);
+#define mrc_jmpbuf_impl jmp_buf
+
+#endif
+
+struct mrc_jmpbuf {
+  mrc_jmpbuf_impl impl;
+};
+
+#endif  /* MRC_THROW_H */