Each statement class in separate file

src/Parser/Statement/StatementFunction.h

@@ -0,0 +1,19 @@
+#include "Parser/Statement/Statement.h"
+
+class StatementBlock;
+
+class StatementFunction: public Statement {
+private:
+    string name;
+    vector<pair<string, ValueType>> arguments;
+    ValueType returnValueType;
+    shared_ptr<StatementBlock> statementBlock;
+
+public:
+    StatementFunction(string name, vector<pair<string, ValueType>> arguments, ValueType returnValueType, shared_ptr<StatementBlock> statementBlock);
+    string getName();
+    vector<pair<string, ValueType>> getArguments();
+    ValueType getReturnValueType();
+    shared_ptr<StatementBlock> getStatementBlock();
+    string toString(int indent) override;
+};