Add std::stou, cant believe its not in the STL

inferno/src/inferno/util/string.h

@@ -0,0 +1,28 @@
+#ifndef UTIL_STRING_H
+#define UTIL_STRING_H
+
+#include <limits> // std::numeric_limits
+#include <string> // std::string, std::stoul
+
+#include "inferno/assert.h"
+
+namespace std {
+
+	// Can't believe this is not in the standard library
+
+	inline uint32_t stou(const char* string)
+	{
+		unsigned long size = std::stoul(string);
+		ASSERT(size <= std::numeric_limits<uint32_t>::max(), "String util not in uint32_t range '{}'", string);
+		return static_cast<uint32_t>(size);
+	}
+
+	inline uint32_t stou(const std::string& string)
+	{
+		return stou(string.c_str());
+	}
+
+} // namespace std
+
+
+#endif // UTIL_STRING_H