show metatable & __index

Author: tangzx

emmy_core/emmy_debugger.cpp

@@ -327,9 +327,37 @@ void Debugger::GetVariable(Variable* variable, lua_State* L, int index, int dept
 			lua_pop(L, 1);
 			tableSize++;
 		}
-		char buff[100];
-		snprintf(buff, sizeof(buff), "table(0x%p)", tableAddr);
-		variable->value = buff;
+
+		if (lua_getmetatable(L, index)) {
+			// metatable
+			auto* metatable = new Variable;
+			metatable->name = "metatable";
+			metatable->nameType = LUA_TSTRING;
+			GetVariable(metatable, L, -1, 2);
+			variable->children.push_back(metatable);
+
+			// __index
+			{
+				if (lua_getfield(L, -1, "__index")) {
+					Variable v;
+					GetVariable(&v, L, -1, 2);
+					if (depth > 1) {
+						for (auto* child : v.children) {
+							variable->children.push_back(child->Clone());
+						}
+					}
+					tableSize += v.children.size();
+				}
+				lua_pop(L, 1);
+			}
+
+			// metatable
+			lua_pop(L, 1);
+		}
+		
+		std::stringstream ss;
+		ss << "table(0x" << std::hex << tableAddr << std::dec << ", size = " << tableSize << ")";
+		variable->value = ss.str();
 		break;
 	}
 	}

emmy_core/stack.cpp

@@ -20,24 +20,38 @@ Variable::Variable(): nameType(LUA_TSTRING), valueType(0), cacheId(0){
 }
 
 Variable::~Variable() {
-	for (auto child : children) {
+	for (auto* child : children) {
 		delete child;
 	}
 }
 
+Variable* Variable::Clone() {
+	auto* to = new Variable;
+	to->name = name;
+	to->nameType = nameType;
+	to->value = value;
+	to->valueType = valueType;
+	to->valueTypeName = valueTypeName;
+	for (auto* child : children) {
+		auto* c = new Variable;
+		to->children.push_back(child->Clone());
+	}
+	return to;
+}
+
 Stack::Stack(): level(0), line(0) {
 }
 
 Stack::~Stack() {
-	for (auto var : localVariables) {
+	for (auto* var : localVariables) {
 		delete var;
 	}
-	for (auto var : upvalueVariables) {
+	for (auto* var : upvalueVariables) {
 		delete var;
 	}
 }
 
 Variable* Stack::CreateVariable() {
-	auto variable = new Variable();
+	auto* variable = new Variable();
 	return variable;
 }

emmy_core/types.h

@@ -49,6 +49,7 @@ class Variable {
 	int cacheId;
 	Variable();
 	~Variable();
+	Variable* Clone();
 };
 
 class Stack {