core: allow hashing of String objects.

src/core/hash.cpp

@@ -122,7 +122,7 @@ uint32_t Hash<uint64_t>::operator ()(uint64_t x)
     return ret ^ 0xffffffffu;
 }
 
-uint32_t Hash<char const *>::operator ()(char const *s)
+static uint32_t HashCharString(char const *s)
 {
     uint32_t ret = 0xffffffffu, ch;
 
@@ -132,5 +132,15 @@ uint32_t Hash<char const *>::operator ()(char const *s)
     return ret ^ 0xffffffffu;
 }
 
+uint32_t Hash<char const *>::operator ()(char const *s)
+{
+    return HashCharString(s);
+}
+
+uint32_t Hash<String>::operator ()(String const &s)
+{
+    return HashCharString(&s[0]);
+}
+
 } /* namespace lol */
 

src/lol/core/hash.h

@@ -37,6 +37,12 @@ public:
     uint32_t operator()(char const *x);
 };
 
+template<> class Hash<String>
+{
+public:
+    uint32_t operator()(String const &s);
+};
+
 } /* namespace lol */
 
 #endif // __LOL_HASH_H__