Fixed clang compilation and added support for making assertions and erros throw exceptions for easier testing.

source/mijin/internal/exception.hpp

@@ -8,6 +8,14 @@
 #define MIJIN_WITH_EXCEPTIONS 0
 #endif
 
+#if !defined(MIJIN_THROWING_ASSERTS)
+#define MIJIN_THROWING_ASSERTS 0
+#endif
+
+#if MIJIN_THROWING_ASSERTS && !defined(MIJIN_TEST_NO_NOEXCEPT)
+#define MIJIN_TEST_NO_NOEXCEPT
+#endif
+
 #if MIJIN_WITH_EXCEPTIONS
 #error "Maybe someday"
 #else