Implements string evaluation and concat

src/Evaluator/EvalValues/EvalValue.hpp

@@ -5,6 +5,7 @@
 #include "../../ScriptType.hpp"
 #include "../EvaluationException.hpp"
 #include <string>
+#include <sstream>
 
 class EvalValue{
 public:
@@ -57,6 +58,12 @@ public:
             return false;
         return this->EvaluateBool() == b->EvaluateBool();
     };
+
+    std::string EvaluateString() final{
+        std::ostringstream strs;
+        strs << _value;
+        return strs.str();
+    }
 };
 
 #endif //PORYGONLANG_EVALVALUE_HPP

src/Evaluator/EvalValues/NumericEvalValue.hpp

@@ -2,6 +2,7 @@
 #ifndef PORYGONLANG_NUMERICEVALVALUE_HPP
 #define PORYGONLANG_NUMERICEVALVALUE_HPP
 
+#include <sstream>
 #include "EvalValue.hpp"
 
 class NumericEvalValue : public EvalValue{
@@ -43,6 +44,12 @@ public:
     long EvaluateInteger() final{
         return _value;
     }
+
+    std::string EvaluateString() final{
+        std::ostringstream strs;
+        strs << _value;
+        return strs.str();
+    }
 };
 
 class FloatEvalValue : public NumericEvalValue{
@@ -61,6 +68,12 @@ public:
     double EvaluateFloat() final{
         return _value;
     }
+
+    std::string EvaluateString() final{
+        std::ostringstream strs;
+        strs << _value;
+        return strs.str();
+    }
 };
 
 #endif //PORYGONLANG_NUMERICEVALVALUE_HPP

src/Evaluator/EvalValues/StringEvalValue.cpp

@@ -0,0 +1,2 @@
+
+#include "StringEvalValue.hpp"

src/Evaluator/EvalValues/StringEvalValue.hpp

@@ -0,0 +1,38 @@
+
+#ifndef PORYGONLANG_STRINGEVALVALUE_HPP
+#define PORYGONLANG_STRINGEVALVALUE_HPP
+
+#include <string>
+#include "EvalValue.hpp"
+
+using namespace std;
+
+class StringEvalValue : public EvalValue{
+    string _value;
+    ScriptType* _type;
+public:
+    explicit StringEvalValue(string s){
+        _value = move(s);
+        _type = new ScriptType(TypeClass::String);
+    }
+    ~StringEvalValue() final{
+        delete _type;
+    }
+
+    ScriptType* GetType() final{
+        return _type;
+    };
+    bool operator ==(EvalValue* b) final{
+        if (b->GetType()->GetClass() != TypeClass::String)
+            return false;
+        return this->_value == b->EvaluateString();
+    };
+
+    string EvaluateString() final{
+        return _value;
+    }
+
+};
+
+
+#endif //PORYGONLANG_STRINGEVALVALUE_HPP