fun with resources

[blobs.git] / src / world / Set.hpp

diff --git a/src/world/Set.hpp b/src/world/Set.hpp
new file mode 100644 (file)
index 0000000..c4aa6e9
--- /dev/null
+++ b/src/world/Set.hpp
@@ -0,0 +1,55 @@
+#ifndef BLOBS_WORLD_SET_HPP_
+#define BLOBS_WORLD_SET_HPP_
+
+#include <map>
+#include <stdexcept>
+#include <string>
+#include <vector>
+
+namespace blobs {
+namespace world {
+
+template<class Type>
+class Set {
+
+public:
+       int Add(const Type &t) {
+               int id = types.size();
+               if (!names.emplace(t.name, id).second) {
+                       throw std::runtime_error("duplicate type name " + t.name);
+               }
+               types.emplace_back(t);
+               types.back().id = id;
+               return id;
+       }
+
+       Type &operator [](int id) noexcept { return types[id]; }
+       const Type &operator [](int id) const noexcept { return types[id]; }
+
+       Type &operator [](const std::string &name) {
+               auto entry = names.find(name);
+               if (entry != names.end()) {
+                       return types[entry->second];
+               } else {
+                       throw std::runtime_error("unknown type " + name);
+               }
+       }
+       const Type &operator [](const std::string &name) const {
+               auto entry = names.find(name);
+               if (entry != names.end()) {
+                       return types[entry->second];
+               } else {
+                       throw std::runtime_error("unknown type " + name);
+               }
+       }
+
+private:
+       std::vector<Type> types;
+       std::map<std::string, int> names;
+
+};
+
+}
+}
+
+#endif