From 269f28df980f34895c3c7181140963b4a86a1afc Mon Sep 17 00:00:00 2001
From: tomsmeding <tom.smeding@gmail.com>
Date: Thu, 9 Feb 2017 22:20:56 +0100
Subject: Split the Scope types, and generic ref/unref

---
 evaluate.cpp | 45 +++++++++++++++++++++++++++------------------
 1 file changed, 27 insertions(+), 18 deletions(-)

(limited to 'evaluate.cpp')

diff --git a/evaluate.cpp b/evaluate.cpp
index c73d59a..ebfb773 100644
--- a/evaluate.cpp
+++ b/evaluate.cpp
@@ -1,4 +1,4 @@
-#include <map>
+#include <stdexcept>
 #include <cassert>
 #include "evaluate.h"
 
@@ -9,37 +9,46 @@ Value::Value(double numval)
 	:type(Type::number),numval(numval){}
 Value::Value(const string &strval)
 	:type(Type::string),strval(strval){}
-Value::Value(const Scope &scope)
+Value::Value(ScopeVal *scope)
 	:type(Type::scope),scope(scope){}
 
 
 namespace A {
-	map<Value*,int> collection;
-
-	template <typename ...Args>
-	Value* ref_create(Args... args){
-		Value *value=new Value(args...);
-		return ref(value);
+	struct CollItem{
+		int count;
+		void (*deleter)(void*);
+	};
+
+	template <typename T>
+	static void generic_deleter(void *p){
+		delete (T*)p;
 	}
 
-	Value* ref(Value *value){
-		auto it=collection.find(value);
+	unordered_map<void*,CollItem> collection;
+
+	template <typename T>
+	T* ref(T *p){
+		auto it=collection.find((void*)p);
 		if(it==collection.end()){
-			collection.emplace(value,1);
+			collection.emplace((void*)p,(CollItem){1,generic_deleter<T>});
 		} else {
-			it->second++;
+			it->second.count++;
 		}
-		return value;
+		return p;
 	}
 
-	void unref(Value *value){
-		auto it=collection.find(value);
+	template <typename T>
+	void unref(T *p){
+		auto it=collection.find(p);
 		assert(it!=collection.end());
-		if(it->second==1){
-			delete value;
+		if(it->second.count==1){
+			if(it->second.deleter!=generic_deleter<T>){
+				throw runtime_error("Unref'd pointer type not the same as the ref'd version!");
+			}
+			it->second.deleter(p);
 			collection.erase(it);
 		} else {
-			it->second--;
+			it->second.count--;
 		}
 	}
 }
-- 
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