diff --git a/src/Parser/ParsedExpressions/ParsedExpression.hpp b/src/Parser/ParsedExpressions/ParsedExpression.hpp
index 9d26b55..4422b71 100644
--- a/src/Parser/ParsedExpressions/ParsedExpression.hpp
+++ b/src/Parser/ParsedExpressions/ParsedExpression.hpp
@@ -42,17 +42,17 @@ namespace Porygon::Parser {
 
         virtual ~ParsedExpression() = default;
 
-        virtual const ParsedExpressionKind GetKind() const = 0;
+        [[nodiscard]] virtual ParsedExpressionKind GetKind() const = 0;
 
-        inline const unsigned int GetStartPosition() const {
+        [[nodiscard]] inline unsigned int GetStartPosition() const {
             return _position;
         }
 
-        inline const unsigned int GetEndPosition() const {
+        [[nodiscard]] inline unsigned int GetEndPosition() const {
             return _position + _length - 1;
         }
 
-        inline const unsigned int GetLength() const {
+        [[nodiscard]] inline unsigned int GetLength() const {
             return _length;
         }
     };
@@ -61,7 +61,7 @@ namespace Porygon::Parser {
     public:
         BadExpression(unsigned int position, unsigned int length) : ParsedExpression(position, length) {}
 
-        inline const ParsedExpressionKind GetKind() const final {
+        [[nodiscard]] inline ParsedExpressionKind GetKind() const final {
             return ParsedExpressionKind::Bad;
         }
     };
@@ -69,7 +69,7 @@ namespace Porygon::Parser {
     class LiteralIntegerExpression : public ParsedExpression {
         const int64_t  _value;
     public:
-        inline const ParsedExpressionKind GetKind() const final {
+        [[nodiscard]] inline ParsedExpressionKind GetKind() const final {
             return ParsedExpressionKind::LiteralInteger;
         }
 
@@ -78,7 +78,7 @@ namespace Porygon::Parser {
                   _value(token->GetValue()) {
         }
 
-        inline const int64_t  GetValue() const {
+        [[nodiscard]] inline int64_t  GetValue() const {
             return _value;
         }
     };
@@ -86,7 +86,7 @@ namespace Porygon::Parser {
     class LiteralFloatExpression : public ParsedExpression {
         const double _value;
     public:
-        inline const ParsedExpressionKind GetKind() const final {
+        [[nodiscard]] inline ParsedExpressionKind GetKind() const final {
             return ParsedExpressionKind::LiteralFloat;
         }
 
@@ -95,7 +95,7 @@ namespace Porygon::Parser {
                   _value(token->GetValue()) {
         }
 
-        inline const double GetValue() const {
+        [[nodiscard]] inline double GetValue() const {
             return _value;
         }
     };
@@ -103,7 +103,7 @@ namespace Porygon::Parser {
     class LiteralStringExpression : public ParsedExpression {
         const u16string _value;
     public:
-        inline const ParsedExpressionKind GetKind() const final {
+        [[nodiscard]] inline ParsedExpressionKind GetKind() const final {
             return ParsedExpressionKind::LiteralString;
         }
 
@@ -112,7 +112,7 @@ namespace Porygon::Parser {
                   _value(token->GetValue()) {
         }
 
-        inline const u16string &GetValue() const {
+        [[nodiscard]] inline const u16string &GetValue() const {
             return _value;
         }
     };
@@ -120,7 +120,7 @@ namespace Porygon::Parser {
     class LiteralBoolExpression : public ParsedExpression {
         const bool _value;
     public:
-        inline const ParsedExpressionKind GetKind() const final {
+        [[nodiscard]]inline ParsedExpressionKind GetKind() const final {
             return ParsedExpressionKind::LiteralBool;
         }
 
@@ -129,14 +129,14 @@ namespace Porygon::Parser {
                   _value(token->GetKind() == TokenKind::TrueKeyword) {
         }
 
-        inline const bool GetValue() const {
+        [[nodiscard]]inline bool GetValue() const {
             return _value;
         }
     };
 
     class NilExpression : public ParsedExpression {
     public:
-        [[nodiscard]] inline const ParsedExpressionKind GetKind() const final {
+        [[nodiscard]] inline ParsedExpressionKind GetKind() const final {
             return ParsedExpressionKind::Nil;
         }
 
@@ -148,7 +148,7 @@ namespace Porygon::Parser {
     class VariableExpression : public ParsedExpression {
         const HashedString _value;
     public:
-        inline const ParsedExpressionKind GetKind() const final {
+        [[nodiscard]]inline ParsedExpressionKind GetKind() const final {
             return ParsedExpressionKind::Variable;
         }
 
@@ -157,7 +157,7 @@ namespace Porygon::Parser {
                                                               _value(HashedString(token->GetValue())) {
         }
 
-        inline const HashedString GetValue() const {
+        [[nodiscard]]inline HashedString GetValue() const {
             return _value;
         }
     };
@@ -170,7 +170,7 @@ namespace Porygon::Parser {
             delete _expression;
         }
 
-        inline const ParsedExpressionKind GetKind() const final {
+        [[nodiscard]] inline ParsedExpressionKind GetKind() const final {
             return ParsedExpressionKind::Parenthesized;
         }
 
@@ -178,7 +178,7 @@ namespace Porygon::Parser {
                 : ParsedExpression(start, length), _expression(innerExpression) {
         }
 
-        inline const ParsedExpression *GetInnerExpression() const {
+        [[nodiscard]]inline const ParsedExpression *GetInnerExpression() const {
             return _expression;
         }
     };
@@ -191,7 +191,7 @@ namespace Porygon::Parser {
             delete _operand;
         }
 
-        inline const ParsedExpressionKind GetKind() const final {
+        [[nodiscard]]inline ParsedExpressionKind GetKind() const final {
             return ParsedExpressionKind::Unary;
         }
 
@@ -200,11 +200,11 @@ namespace Porygon::Parser {
                   _kind(kind), _operand(operand) {
         }
 
-        inline const UnaryOperatorKind GetOperatorKind() const {
+        [[nodiscard]]inline UnaryOperatorKind GetOperatorKind() const {
             return _kind;
         }
 
-        inline const ParsedExpression *GetOperand() const {
+        [[nodiscard]]inline const ParsedExpression *GetOperand() const {
             return _operand;
         }
     };
@@ -219,7 +219,7 @@ namespace Porygon::Parser {
             delete _right;
         }
 
-        inline const ParsedExpressionKind GetKind() const final {
+        [[nodiscard]]inline ParsedExpressionKind GetKind() const final {
             return ParsedExpressionKind::Binary;
         }
 
@@ -229,15 +229,15 @@ namespace Porygon::Parser {
                   _kind(kind), _left(left), _right(right) {
         }
 
-        inline const BinaryOperatorKind GetOperatorKind() const {
+        [[nodiscard]]inline BinaryOperatorKind GetOperatorKind() const {
             return _kind;
         }
 
-        inline const ParsedExpression *GetLeft() const {
+        [[nodiscard]]inline const ParsedExpression *GetLeft() const {
             return _left;
         }
 
-        inline const ParsedExpression *GetRight() const {
+        [[nodiscard]]inline const ParsedExpression *GetRight() const {
             return _right;
         }
     };
@@ -258,15 +258,15 @@ namespace Porygon::Parser {
             }
         }
 
-        inline const ParsedExpressionKind GetKind() const final {
+        [[nodiscard]] inline ParsedExpressionKind GetKind() const final {
             return ParsedExpressionKind::FunctionCall;
         }
 
-        inline const ParsedExpression *GetFunction() const {
+        [[nodiscard]] inline const ParsedExpression *GetFunction() const {
             return _function.get();
         }
 
-        inline const vector<const ParsedExpression *> *GetParameters() const {
+        [[nodiscard]] inline const vector<const ParsedExpression *> *GetParameters() const {
             return &_parameters;
         }
     };
@@ -285,15 +285,15 @@ namespace Porygon::Parser {
             delete _indexExpression;
         }
 
-        inline const ParsedExpressionKind GetKind() const final {
+        [[nodiscard]] inline ParsedExpressionKind GetKind() const final {
             return ParsedExpressionKind::Indexer;
         }
 
-        inline const ParsedExpression *GetIndexer() const {
+        [[nodiscard]] inline const ParsedExpression *GetIndexer() const {
             return _indexerExpression;
         }
 
-        inline const ParsedExpression *GetIndex() const {
+        [[nodiscard]] inline const ParsedExpression *GetIndex() const {
             return _indexExpression;
         }
     };
@@ -302,7 +302,7 @@ namespace Porygon::Parser {
         const ParsedExpression *_indexerExpression;
         const HashedString _index;
     public:
-        PeriodIndexExpression(ParsedExpression *indexer, HashedString index, unsigned int start, unsigned int length)
+        PeriodIndexExpression(ParsedExpression *indexer, const HashedString& index, unsigned int start, unsigned int length)
                 : ParsedExpression(start, length),
                   _indexerExpression(indexer), _index(index) {
         }
@@ -311,15 +311,15 @@ namespace Porygon::Parser {
             delete _indexerExpression;
         }
 
-        inline const ParsedExpressionKind GetKind() const final {
+        [[nodiscard]] inline ParsedExpressionKind GetKind() const final {
             return ParsedExpressionKind::PeriodIndexer;
         }
 
-        inline const ParsedExpression *GetIndexer() const {
+        [[nodiscard]] inline const ParsedExpression *GetIndexer() const {
             return _indexerExpression;
         }
 
-        inline const HashedString &GetIndex() const {
+        [[nodiscard]] inline const HashedString &GetIndex() const {
             return _index;
         }
     };
@@ -339,11 +339,11 @@ namespace Porygon::Parser {
             }
         }
 
-        inline const vector<const ParsedExpression *> *GetExpressions() const {
+        [[nodiscard]] inline const vector<const ParsedExpression *> *GetExpressions() const {
             return &_expressions;
         }
 
-        inline const ParsedExpressionKind GetKind() const final {
+        [[nodiscard]] inline ParsedExpressionKind GetKind() const final {
             return ParsedExpressionKind::NumericalTable;
         }
     };
diff --git a/src/Parser/ParsedExpressions/ParsedTableExpression.hpp b/src/Parser/ParsedExpressions/ParsedTableExpression.hpp
index 0452e0d..8673fd8 100644
--- a/src/Parser/ParsedExpressions/ParsedTableExpression.hpp
+++ b/src/Parser/ParsedExpressions/ParsedTableExpression.hpp
@@ -17,11 +17,11 @@ namespace Porygon::Parser {
             delete _block;
         }
 
-        const ParsedBlockStatement *GetBlock() const {
+        [[nodiscard]] const ParsedBlockStatement *GetBlock() const {
             return _block;
         }
 
-        const ParsedExpressionKind GetKind() const final {
+        [[nodiscard]] ParsedExpressionKind GetKind() const final {
             return ParsedExpressionKind::Table;
         }
     };