From 3ddc966106cb24bdbfe5be6571291e76722b3ebb Mon Sep 17 00:00:00 2001
From: Syndamia <kamen@syndamia.com>
Date: Wed, 30 Nov 2022 09:55:13 +0200
Subject: [PNP] Fixed retrieval of value in variable

---
 src/MemoryData.cpp           | 16 ++++++++++++++++
 src/MemoryData.h             |  7 +++++++
 src/PolishNotationParser.cpp |  7 ++++---
 src/test.arzu                |  3 +++
 4 files changed, 30 insertions(+), 3 deletions(-)

diff --git a/src/MemoryData.cpp b/src/MemoryData.cpp
index 34e2877..fa7f024 100644
--- a/src/MemoryData.cpp
+++ b/src/MemoryData.cpp
@@ -7,6 +7,10 @@ MemoryData::Type MemoryData::get_type() const {
 
 MemoryData::MemoryData() : type(TNone) {}
 
+MemoryData* MemoryData::clone() {
+	return new MemoryData(*this);
+}
+
 Name::Name() : value() {
 	this->type = TName;
 }
@@ -15,10 +19,22 @@ Name::Name(string& str) : value(str) {
 	this->type = TName;
 }
 
+MemoryData* Name::clone() {
+	return new Name(*this);
+}
+
 Int::Int(int num) : value(num) {
 	this->type = TInt;
 }
 
+MemoryData* Int::clone() {
+	return new Int(*this);
+}
+
 Function::Function(list<string> argNames, int scopeStart, int scopeEnd) : argumentNames(argNames), scopeStart(scopeStart), scopeEnd(scopeEnd) {
 	this->type = TFunc;
 }
+
+MemoryData* Function::clone() {
+	return new Function(*this);
+}
diff --git a/src/MemoryData.h b/src/MemoryData.h
index 06f259a..9f08921 100644
--- a/src/MemoryData.h
+++ b/src/MemoryData.h
@@ -20,6 +20,7 @@ protected:
 public:
 
 	Type get_type() const;
+	virtual MemoryData* clone();
 
 	MemoryData();
 	~MemoryData() = default;
@@ -29,11 +30,15 @@ struct Name : public MemoryData {
 	string value;
 	Name();
 	Name(string&);
+
+	MemoryData* clone() override;
 };
 
 struct Int : public MemoryData {
 	int value;
 	Int(int);
+
+	MemoryData* clone() override;
 };
 
 struct Function : public MemoryData {
@@ -41,6 +46,8 @@ struct Function : public MemoryData {
 	int scopeStart;
 	int scopeEnd;
 	Function(list<string>, int, int);
+
+	MemoryData* clone() override;
 };
 
 #endif
diff --git a/src/PolishNotationParser.cpp b/src/PolishNotationParser.cpp
index 22905a6..bf941d8 100644
--- a/src/PolishNotationParser.cpp
+++ b/src/PolishNotationParser.cpp
@@ -82,6 +82,7 @@ void PNParser::pushToWork(Memory& mem, MemoryData* data, ifstream& inFile) {
 
 void PNParser::parseScope(ifstream& inFile, Memory& mem, int start, int end) {
 	mem.scopeVars.push(0);
+
 	bool absorbed = false;
 	while (start < inFile.tellg() && inFile.tellg() < end && inFile.peek() != EOF) {
 		skipSpacing(inFile);
@@ -119,10 +120,10 @@ void PNParser::parseScope(ifstream& inFile, Memory& mem, int start, int end) {
 		/* If value is a variable */
 
 		Name* cname;
-		for (auto i = ++mem.vars.rbegin(); mem.vars.size() > 0 && i++ != mem.vars.rend(); ++i) {
+		for (auto i = mem.vars.rbegin(); i++ != mem.vars.rend(); ++i) {
 			cname = static_cast<Name*>(*i);
 			if (cname->value == name->value) {
-				MemoryData* value = new MemoryData(*static_cast<MemoryData*>(*(--i)));
+				MemoryData* value = (*(--i))->clone();
 				pushToWork(mem, value, inFile);
 				absorbed = true;
 				break;
@@ -136,7 +137,7 @@ void PNParser::parseScope(ifstream& inFile, Memory& mem, int start, int end) {
 		pushToWork(mem, name, inFile);
 	}
 	cout << static_cast<Int*>(mem.vars.back())->value << endl;
-	// cout << static_cast<Int*>(mem.work.top())->value << endl;
+	cout << static_cast<Int*>(mem.work.top())->value << endl;
 
 	for (int i = mem.scopeVars.top(); i > 0; i--) {
 		delete mem.vars.back();
diff --git a/src/test.arzu b/src/test.arzu
index 57419d1..570efa6 100644
--- a/src/test.arzu
+++ b/src/test.arzu
@@ -1 +1,4 @@
 devar a 10
+devar b 2
+
+- * + a a * 4 b / a b
-- 
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