diff --git a/grammar/MXLexer.g4 b/grammar/MXLexer.g4
index 4a90d96..2f12341 100644
--- a/grammar/MXLexer.g4
+++ b/grammar/MXLexer.g4
@@ -76,5 +76,5 @@ fragment ESC : '\\n'| '\\"' | '\\\\';
 
 // Whitespace and comments
 WS: [ \t\r\n]+ -> skip;
-LINE_COMMENT : '//' .*? '\r'? '\n' -> skip;
+LINE_COMMENT : '//' .*? '\r'? ('\n'|EOF) -> skip;
 BLOCK_COMMENT: '/*' .*? '*/'       -> skip;
\ No newline at end of file
diff --git a/include/ast/expr_astnode.h b/include/ast/expr_astnode.h
index 8f68110..9b193a8 100644
--- a/include/ast/expr_astnode.h
+++ b/include/ast/expr_astnode.h
@@ -9,9 +9,10 @@ class Expr_ASTNode : public ASTNodeBase {
   friend Visitor;
   friend class ASTSemanticCheckVisitor;
   ExprTypeInfo expr_type_info;
+  bool assignable;
 
  public:
-  Expr_ASTNode() = default;
+  Expr_ASTNode() : assignable(false){};
   virtual ~Expr_ASTNode() = default;
 };
 
diff --git a/src/ast/semanticvisitor.cpp b/src/ast/semanticvisitor.cpp
index d92d29e..7474e16 100644
--- a/src/ast/semanticvisitor.cpp
+++ b/src/ast/semanticvisitor.cpp
@@ -15,9 +15,9 @@ void ASTSemanticCheckVisitor::ActuralVisit(FuncDef_ASTNode *node) {
 }
 
 void ASTSemanticCheckVisitor::ActuralVisit(ClassDef_ASTNode *node) {
-  for (auto var : node->member_variables) {
-    var->accept(this);
-  }
+  // for (auto var : node->member_variables) {
+  //   var->accept(this);
+  // }
   cur_class_name = node->class_name;
   for (auto ch : node->sorted_children) {
     if (std::dynamic_pointer_cast<DefinitionStatement_ASTNode>(ch) == nullptr) {
@@ -47,12 +47,16 @@ void ASTSemanticCheckVisitor::ActuralVisit(DefinitionStatement_ASTNode *node) {
     if (!ClassExists(base_type)) {
       throw SemanticError("Undefined class " + base_type, 1);
     }
+    if (var.second) {
+      var.second->accept(this);
+    }
     if (!cur_scope->add_variable(var.first, node->var_type)) {
       throw SemanticError("Variable redefinition for " + var.first, 1);
     }
     if (var.second) {
-      var.second->accept(this);
-      // TODO type check
+      if (node->var_type != var.second->expr_type_info) {
+        throw SemanticError("Variable type mismatch", 1);
+      }
     }
   }
 }
@@ -125,6 +129,9 @@ void ASTSemanticCheckVisitor::ActuralVisit(SuiteStatement_ASTNode *node) {
 
 // Expression AST Nodes
 void ASTSemanticCheckVisitor::ActuralVisit(NewArrayExpr_ASTNode *node) {
+  if (std::get<ArrayType>(node->expr_type_info).basetype == "void") {
+    throw SemanticError("Array base type cannot be void", 1);
+  }
   for (size_t i = 0; i < node->dim_size.size(); i++) {
     if (node->dim_size[i]) {
       node->dim_size[i]->accept(this);
@@ -142,9 +149,17 @@ void ASTSemanticCheckVisitor::ActuralVisit(NewArrayExpr_ASTNode *node) {
   }
 }
 
-void ASTSemanticCheckVisitor::ActuralVisit(NewConstructExpr_ASTNode *node) {}
+void ASTSemanticCheckVisitor::ActuralVisit(NewConstructExpr_ASTNode *node) {
+  if (std::get<IdentifierType>(node->expr_type_info) == "void") {
+    throw SemanticError("Cannot construct void", 1);
+  }
+}
 
-void ASTSemanticCheckVisitor::ActuralVisit(NewExpr_ASTNode *node) {}
+void ASTSemanticCheckVisitor::ActuralVisit(NewExpr_ASTNode *node) {
+  if (std::get<IdentifierType>(node->expr_type_info) == "void") {
+    throw SemanticError("Cannot construct void", 1);
+  }
+}
 
 void ASTSemanticCheckVisitor::ActuralVisit(AccessExpr_ASTNode *node) {
   // TODO: Implement this method
@@ -173,8 +188,15 @@ void ASTSemanticCheckVisitor::ActuralVisit(AccessExpr_ASTNode *node) {
         throw SemanticError("Argument type mismatch", 1);
       }
     }
+    node->expr_type_info = schema.return_type;
+    node->assignable = true;
+    if (std::holds_alternative<IdentifierType>(node->expr_type_info)) {
+      std::string type = std::get<IdentifierType>(node->expr_type_info);
+      if (type == "int" || type == "bool" || type == "void") node->assignable = false;
+    }
   } else {
     node->expr_type_info = global_scope->FetchClassMemberVariable(base_type, node->member);
+    node->assignable = true;
   }
 }
 
@@ -200,11 +222,15 @@ void ASTSemanticCheckVisitor::ActuralVisit(IndexExpr_ASTNode *node) {
   } else {
     node->expr_type_info = ArrayType{true, tp.basetype, tp.level - node->indices.size()};
   }
+  node->assignable = true;
 }
 
 void ASTSemanticCheckVisitor::ActuralVisit(SuffixExpr_ASTNode *node) {
   // TODO: Implement this method
   node->base->accept(this);
+  if (!node->base->assignable) {
+    throw SemanticError("Suffix operation on non-assignable", 1);
+  }
   const static ExprTypeInfo standard = "int";
   if (node->base->expr_type_info != standard) {
     throw SemanticError("Suffix operation on non-int", 1);
@@ -215,11 +241,15 @@ void ASTSemanticCheckVisitor::ActuralVisit(SuffixExpr_ASTNode *node) {
 void ASTSemanticCheckVisitor::ActuralVisit(PrefixExpr_ASTNode *node) {
   // TODO: Implement this method
   node->base->accept(this);
+  if (!node->base->assignable) {
+    throw SemanticError("Prefix operation on non-assignable", 1);
+  }
   const static ExprTypeInfo standard = "int";
   if (node->base->expr_type_info != standard) {
     throw SemanticError("Prefix operation on non-int", 1);
   }
   node->expr_type_info = standard;
+  node->assignable = true;
 }
 
 void ASTSemanticCheckVisitor::ActuralVisit(OppositeExpr_ASTNode *node) {
@@ -384,6 +414,9 @@ void ASTSemanticCheckVisitor::ActuralVisit(TernaryExpr_ASTNode *node) {
 void ASTSemanticCheckVisitor::ActuralVisit(AssignExpr_ASTNode *node) {
   // TODO: Implement this method
   node->dest->accept(this);
+  if (!node->dest->assignable) {
+    throw SemanticError("Assign operation on non-assignable", 1);
+  }
   node->src->accept(this);
   if (node->dest->expr_type_info != node->src->expr_type_info) {
     throw SemanticError("Assign operation on different type", 1);
@@ -398,12 +431,14 @@ void ASTSemanticCheckVisitor::ActuralVisit(ThisExpr_ASTNode *node) {
 void ASTSemanticCheckVisitor::ActuralVisit(ParenExpr_ASTNode *node) {
   node->expr->accept(this);
   node->expr_type_info = node->expr->expr_type_info;
+  node->assignable = node->expr->assignable;
 }
 
 void ASTSemanticCheckVisitor::ActuralVisit(IDExpr_ASTNode *node) {
   // TODO: Implement this method
   // TODO: process type
   node->expr_type_info = node->current_scope->fetch_varaible(node->id);
+  node->assignable = true;
 }
 
 void ASTSemanticCheckVisitor::ActuralVisit(FunctionCallExpr_ASTNode *node) {
@@ -422,6 +457,11 @@ void ASTSemanticCheckVisitor::ActuralVisit(FunctionCallExpr_ASTNode *node) {
     }
   }
   node->expr_type_info = schema.return_type;
+  node->assignable = true;
+  if (std::holds_alternative<IdentifierType>(node->expr_type_info)) {
+    std::string type = std::get<IdentifierType>(node->expr_type_info);
+    if (type == "int" || type == "bool" || type == "void") node->assignable = false;
+  }
 }
 
 void ASTSemanticCheckVisitor::ActuralVisit(FormattedStringExpr_ASTNode *node) {
diff --git a/src/semantic/antlr-generated/MXLexer.cpp b/src/semantic/antlr-generated/MXLexer.cpp
index 19891b0..0064e31 100644
--- a/src/semantic/antlr-generated/MXLexer.cpp
+++ b/src/semantic/antlr-generated/MXLexer.cpp
@@ -97,7 +97,7 @@ void mxlexerLexerInitialize() {
     }
   );
   static const int32_t serializedATNSegment[] = {
-  	4,0,61,410,6,-1,2,0,7,0,2,1,7,1,2,2,7,2,2,3,7,3,2,4,7,4,2,5,7,5,2,6,7,
+  	4,0,61,411,6,-1,2,0,7,0,2,1,7,1,2,2,7,2,2,3,7,3,2,4,7,4,2,5,7,5,2,6,7,
   	6,2,7,7,7,2,8,7,8,2,9,7,9,2,10,7,10,2,11,7,11,2,12,7,12,2,13,7,13,2,14,
   	7,14,2,15,7,15,2,16,7,16,2,17,7,17,2,18,7,18,2,19,7,19,2,20,7,20,2,21,
   	7,21,2,22,7,22,2,23,7,23,2,24,7,24,2,25,7,25,2,26,7,26,2,27,7,27,2,28,
@@ -125,111 +125,112 @@ void mxlexerLexerInitialize() {
   	1,62,1,62,5,62,359,8,62,10,62,12,62,362,9,62,1,62,1,62,1,63,1,63,1,63,
   	1,63,1,63,1,63,3,63,372,8,63,1,64,4,64,375,8,64,11,64,12,64,376,1,64,
   	1,64,1,65,1,65,1,65,1,65,5,65,385,8,65,10,65,12,65,388,9,65,1,65,3,65,
-  	391,8,65,1,65,1,65,1,65,1,65,1,66,1,66,1,66,1,66,5,66,401,8,66,10,66,
-  	12,66,404,9,66,1,66,1,66,1,66,1,66,1,66,3,360,386,402,0,67,1,1,3,2,5,
-  	3,7,4,9,5,11,6,13,7,15,8,17,9,19,10,21,11,23,12,25,13,27,14,29,15,31,
-  	16,33,17,35,18,37,19,39,20,41,21,43,22,45,23,47,24,49,25,51,26,53,27,
-  	55,28,57,29,59,30,61,31,63,32,65,33,67,34,69,35,71,36,73,37,75,38,77,
-  	39,79,40,81,41,83,42,85,43,87,44,89,45,91,46,93,47,95,48,97,49,99,50,
-  	101,51,103,52,105,53,107,54,109,55,111,0,113,0,115,0,117,0,119,0,121,
-  	56,123,57,125,58,127,0,129,59,131,60,133,61,1,0,6,3,0,34,34,36,36,92,
-  	92,2,0,65,90,97,122,4,0,48,57,65,90,95,95,97,122,1,0,48,57,2,0,34,34,
-  	92,92,3,0,9,10,13,13,32,32,416,0,1,1,0,0,0,0,3,1,0,0,0,0,5,1,0,0,0,0,
-  	7,1,0,0,0,0,9,1,0,0,0,0,11,1,0,0,0,0,13,1,0,0,0,0,15,1,0,0,0,0,17,1,0,
-  	0,0,0,19,1,0,0,0,0,21,1,0,0,0,0,23,1,0,0,0,0,25,1,0,0,0,0,27,1,0,0,0,
-  	0,29,1,0,0,0,0,31,1,0,0,0,0,33,1,0,0,0,0,35,1,0,0,0,0,37,1,0,0,0,0,39,
-  	1,0,0,0,0,41,1,0,0,0,0,43,1,0,0,0,0,45,1,0,0,0,0,47,1,0,0,0,0,49,1,0,
-  	0,0,0,51,1,0,0,0,0,53,1,0,0,0,0,55,1,0,0,0,0,57,1,0,0,0,0,59,1,0,0,0,
-  	0,61,1,0,0,0,0,63,1,0,0,0,0,65,1,0,0,0,0,67,1,0,0,0,0,69,1,0,0,0,0,71,
-  	1,0,0,0,0,73,1,0,0,0,0,75,1,0,0,0,0,77,1,0,0,0,0,79,1,0,0,0,0,81,1,0,
-  	0,0,0,83,1,0,0,0,0,85,1,0,0,0,0,87,1,0,0,0,0,89,1,0,0,0,0,91,1,0,0,0,
-  	0,93,1,0,0,0,0,95,1,0,0,0,0,97,1,0,0,0,0,99,1,0,0,0,0,101,1,0,0,0,0,103,
-  	1,0,0,0,0,105,1,0,0,0,0,107,1,0,0,0,0,109,1,0,0,0,0,121,1,0,0,0,0,123,
-  	1,0,0,0,0,125,1,0,0,0,0,129,1,0,0,0,0,131,1,0,0,0,0,133,1,0,0,0,1,135,
-  	1,0,0,0,3,140,1,0,0,0,5,145,1,0,0,0,7,149,1,0,0,0,9,156,1,0,0,0,11,160,
-  	1,0,0,0,13,166,1,0,0,0,15,171,1,0,0,0,17,176,1,0,0,0,19,182,1,0,0,0,21,
-  	187,1,0,0,0,23,190,1,0,0,0,25,195,1,0,0,0,27,199,1,0,0,0,29,205,1,0,0,
-  	0,31,211,1,0,0,0,33,220,1,0,0,0,35,227,1,0,0,0,37,229,1,0,0,0,39,231,
-  	1,0,0,0,41,233,1,0,0,0,43,235,1,0,0,0,45,237,1,0,0,0,47,240,1,0,0,0,49,
-  	242,1,0,0,0,51,245,1,0,0,0,53,247,1,0,0,0,55,250,1,0,0,0,57,253,1,0,0,
-  	0,59,256,1,0,0,0,61,259,1,0,0,0,63,261,1,0,0,0,65,264,1,0,0,0,67,267,
-  	1,0,0,0,69,269,1,0,0,0,71,271,1,0,0,0,73,273,1,0,0,0,75,275,1,0,0,0,77,
-  	277,1,0,0,0,79,280,1,0,0,0,81,283,1,0,0,0,83,285,1,0,0,0,85,287,1,0,0,
-  	0,87,289,1,0,0,0,89,291,1,0,0,0,91,293,1,0,0,0,93,295,1,0,0,0,95,297,
-  	1,0,0,0,97,299,1,0,0,0,99,301,1,0,0,0,101,303,1,0,0,0,103,305,1,0,0,0,
-  	105,311,1,0,0,0,107,317,1,0,0,0,109,321,1,0,0,0,111,330,1,0,0,0,113,333,
-  	1,0,0,0,115,336,1,0,0,0,117,338,1,0,0,0,119,341,1,0,0,0,121,343,1,0,0,
-  	0,123,351,1,0,0,0,125,355,1,0,0,0,127,371,1,0,0,0,129,374,1,0,0,0,131,
-  	380,1,0,0,0,133,396,1,0,0,0,135,136,5,118,0,0,136,137,5,111,0,0,137,138,
-  	5,105,0,0,138,139,5,100,0,0,139,2,1,0,0,0,140,141,5,98,0,0,141,142,5,
-  	111,0,0,142,143,5,111,0,0,143,144,5,108,0,0,144,4,1,0,0,0,145,146,5,105,
-  	0,0,146,147,5,110,0,0,147,148,5,116,0,0,148,6,1,0,0,0,149,150,5,115,0,
-  	0,150,151,5,116,0,0,151,152,5,114,0,0,152,153,5,105,0,0,153,154,5,110,
-  	0,0,154,155,5,103,0,0,155,8,1,0,0,0,156,157,5,110,0,0,157,158,5,101,0,
-  	0,158,159,5,119,0,0,159,10,1,0,0,0,160,161,5,99,0,0,161,162,5,108,0,0,
-  	162,163,5,97,0,0,163,164,5,115,0,0,164,165,5,115,0,0,165,12,1,0,0,0,166,
-  	167,5,110,0,0,167,168,5,117,0,0,168,169,5,108,0,0,169,170,5,108,0,0,170,
-  	14,1,0,0,0,171,172,5,116,0,0,172,173,5,114,0,0,173,174,5,117,0,0,174,
-  	175,5,101,0,0,175,16,1,0,0,0,176,177,5,102,0,0,177,178,5,97,0,0,178,179,
-  	5,108,0,0,179,180,5,115,0,0,180,181,5,101,0,0,181,18,1,0,0,0,182,183,
-  	5,116,0,0,183,184,5,104,0,0,184,185,5,105,0,0,185,186,5,115,0,0,186,20,
-  	1,0,0,0,187,188,5,105,0,0,188,189,5,102,0,0,189,22,1,0,0,0,190,191,5,
-  	101,0,0,191,192,5,108,0,0,192,193,5,115,0,0,193,194,5,101,0,0,194,24,
-  	1,0,0,0,195,196,5,102,0,0,196,197,5,111,0,0,197,198,5,114,0,0,198,26,
-  	1,0,0,0,199,200,5,119,0,0,200,201,5,104,0,0,201,202,5,105,0,0,202,203,
-  	5,108,0,0,203,204,5,101,0,0,204,28,1,0,0,0,205,206,5,98,0,0,206,207,5,
-  	114,0,0,207,208,5,101,0,0,208,209,5,97,0,0,209,210,5,107,0,0,210,30,1,
-  	0,0,0,211,212,5,99,0,0,212,213,5,111,0,0,213,214,5,110,0,0,214,215,5,
-  	116,0,0,215,216,5,105,0,0,216,217,5,110,0,0,217,218,5,117,0,0,218,219,
-  	5,101,0,0,219,32,1,0,0,0,220,221,5,114,0,0,221,222,5,101,0,0,222,223,
-  	5,116,0,0,223,224,5,117,0,0,224,225,5,114,0,0,225,226,5,110,0,0,226,34,
-  	1,0,0,0,227,228,5,43,0,0,228,36,1,0,0,0,229,230,5,45,0,0,230,38,1,0,0,
-  	0,231,232,5,42,0,0,232,40,1,0,0,0,233,234,5,47,0,0,234,42,1,0,0,0,235,
-  	236,5,37,0,0,236,44,1,0,0,0,237,238,5,62,0,0,238,239,5,61,0,0,239,46,
-  	1,0,0,0,240,241,5,62,0,0,241,48,1,0,0,0,242,243,5,60,0,0,243,244,5,61,
-  	0,0,244,50,1,0,0,0,245,246,5,60,0,0,246,52,1,0,0,0,247,248,5,33,0,0,248,
-  	249,5,61,0,0,249,54,1,0,0,0,250,251,5,61,0,0,251,252,5,61,0,0,252,56,
-  	1,0,0,0,253,254,5,38,0,0,254,255,5,38,0,0,255,58,1,0,0,0,256,257,5,124,
-  	0,0,257,258,5,124,0,0,258,60,1,0,0,0,259,260,5,33,0,0,260,62,1,0,0,0,
-  	261,262,5,62,0,0,262,263,5,62,0,0,263,64,1,0,0,0,264,265,5,60,0,0,265,
-  	266,5,60,0,0,266,66,1,0,0,0,267,268,5,38,0,0,268,68,1,0,0,0,269,270,5,
-  	124,0,0,270,70,1,0,0,0,271,272,5,94,0,0,272,72,1,0,0,0,273,274,5,126,
-  	0,0,274,74,1,0,0,0,275,276,5,61,0,0,276,76,1,0,0,0,277,278,5,43,0,0,278,
-  	279,5,43,0,0,279,78,1,0,0,0,280,281,5,45,0,0,281,282,5,45,0,0,282,80,
-  	1,0,0,0,283,284,5,46,0,0,284,82,1,0,0,0,285,286,5,63,0,0,286,84,1,0,0,
-  	0,287,288,5,58,0,0,288,86,1,0,0,0,289,290,5,40,0,0,290,88,1,0,0,0,291,
-  	292,5,41,0,0,292,90,1,0,0,0,293,294,5,91,0,0,294,92,1,0,0,0,295,296,5,
-  	93,0,0,296,94,1,0,0,0,297,298,5,123,0,0,298,96,1,0,0,0,299,300,5,125,
-  	0,0,300,98,1,0,0,0,301,302,5,59,0,0,302,100,1,0,0,0,303,304,5,44,0,0,
-  	304,102,1,0,0,0,305,306,5,102,0,0,306,307,5,34,0,0,307,308,1,0,0,0,308,
-  	309,3,111,55,0,309,310,5,34,0,0,310,104,1,0,0,0,311,312,5,102,0,0,312,
-  	313,5,34,0,0,313,314,1,0,0,0,314,315,3,111,55,0,315,316,5,36,0,0,316,
-  	106,1,0,0,0,317,318,5,36,0,0,318,319,3,111,55,0,319,320,5,34,0,0,320,
-  	108,1,0,0,0,321,322,5,36,0,0,322,323,3,111,55,0,323,324,5,36,0,0,324,
-  	110,1,0,0,0,325,329,3,117,58,0,326,329,3,127,63,0,327,329,8,0,0,0,328,
-  	325,1,0,0,0,328,326,1,0,0,0,328,327,1,0,0,0,329,332,1,0,0,0,330,328,1,
-  	0,0,0,330,331,1,0,0,0,331,112,1,0,0,0,332,330,1,0,0,0,333,334,5,102,0,
-  	0,334,335,5,34,0,0,335,114,1,0,0,0,336,337,5,34,0,0,337,116,1,0,0,0,338,
-  	339,5,36,0,0,339,340,5,36,0,0,340,118,1,0,0,0,341,342,5,36,0,0,342,120,
-  	1,0,0,0,343,347,7,1,0,0,344,346,7,2,0,0,345,344,1,0,0,0,346,349,1,0,0,
-  	0,347,345,1,0,0,0,347,348,1,0,0,0,348,122,1,0,0,0,349,347,1,0,0,0,350,
-  	352,7,3,0,0,351,350,1,0,0,0,352,353,1,0,0,0,353,351,1,0,0,0,353,354,1,
-  	0,0,0,354,124,1,0,0,0,355,360,5,34,0,0,356,359,3,127,63,0,357,359,8,4,
-  	0,0,358,356,1,0,0,0,358,357,1,0,0,0,359,362,1,0,0,0,360,361,1,0,0,0,360,
-  	358,1,0,0,0,361,363,1,0,0,0,362,360,1,0,0,0,363,364,5,34,0,0,364,126,
-  	1,0,0,0,365,366,5,92,0,0,366,372,5,110,0,0,367,368,5,92,0,0,368,372,5,
-  	34,0,0,369,370,5,92,0,0,370,372,5,92,0,0,371,365,1,0,0,0,371,367,1,0,
-  	0,0,371,369,1,0,0,0,372,128,1,0,0,0,373,375,7,5,0,0,374,373,1,0,0,0,375,
-  	376,1,0,0,0,376,374,1,0,0,0,376,377,1,0,0,0,377,378,1,0,0,0,378,379,6,
-  	64,0,0,379,130,1,0,0,0,380,381,5,47,0,0,381,382,5,47,0,0,382,386,1,0,
-  	0,0,383,385,9,0,0,0,384,383,1,0,0,0,385,388,1,0,0,0,386,387,1,0,0,0,386,
-  	384,1,0,0,0,387,390,1,0,0,0,388,386,1,0,0,0,389,391,5,13,0,0,390,389,
-  	1,0,0,0,390,391,1,0,0,0,391,392,1,0,0,0,392,393,5,10,0,0,393,394,1,0,
-  	0,0,394,395,6,65,0,0,395,132,1,0,0,0,396,397,5,47,0,0,397,398,5,42,0,
-  	0,398,402,1,0,0,0,399,401,9,0,0,0,400,399,1,0,0,0,401,404,1,0,0,0,402,
-  	403,1,0,0,0,402,400,1,0,0,0,403,405,1,0,0,0,404,402,1,0,0,0,405,406,5,
-  	42,0,0,406,407,5,47,0,0,407,408,1,0,0,0,408,409,6,66,0,0,409,134,1,0,
-  	0,0,12,0,328,330,347,353,358,360,371,376,386,390,402,1,6,0,0
+  	391,8,65,1,65,3,65,394,8,65,1,65,1,65,1,66,1,66,1,66,1,66,5,66,402,8,
+  	66,10,66,12,66,405,9,66,1,66,1,66,1,66,1,66,1,66,3,360,386,403,0,67,1,
+  	1,3,2,5,3,7,4,9,5,11,6,13,7,15,8,17,9,19,10,21,11,23,12,25,13,27,14,29,
+  	15,31,16,33,17,35,18,37,19,39,20,41,21,43,22,45,23,47,24,49,25,51,26,
+  	53,27,55,28,57,29,59,30,61,31,63,32,65,33,67,34,69,35,71,36,73,37,75,
+  	38,77,39,79,40,81,41,83,42,85,43,87,44,89,45,91,46,93,47,95,48,97,49,
+  	99,50,101,51,103,52,105,53,107,54,109,55,111,0,113,0,115,0,117,0,119,
+  	0,121,56,123,57,125,58,127,0,129,59,131,60,133,61,1,0,7,3,0,34,34,36,
+  	36,92,92,2,0,65,90,97,122,4,0,48,57,65,90,95,95,97,122,1,0,48,57,2,0,
+  	34,34,92,92,3,0,9,10,13,13,32,32,1,1,10,10,417,0,1,1,0,0,0,0,3,1,0,0,
+  	0,0,5,1,0,0,0,0,7,1,0,0,0,0,9,1,0,0,0,0,11,1,0,0,0,0,13,1,0,0,0,0,15,
+  	1,0,0,0,0,17,1,0,0,0,0,19,1,0,0,0,0,21,1,0,0,0,0,23,1,0,0,0,0,25,1,0,
+  	0,0,0,27,1,0,0,0,0,29,1,0,0,0,0,31,1,0,0,0,0,33,1,0,0,0,0,35,1,0,0,0,
+  	0,37,1,0,0,0,0,39,1,0,0,0,0,41,1,0,0,0,0,43,1,0,0,0,0,45,1,0,0,0,0,47,
+  	1,0,0,0,0,49,1,0,0,0,0,51,1,0,0,0,0,53,1,0,0,0,0,55,1,0,0,0,0,57,1,0,
+  	0,0,0,59,1,0,0,0,0,61,1,0,0,0,0,63,1,0,0,0,0,65,1,0,0,0,0,67,1,0,0,0,
+  	0,69,1,0,0,0,0,71,1,0,0,0,0,73,1,0,0,0,0,75,1,0,0,0,0,77,1,0,0,0,0,79,
+  	1,0,0,0,0,81,1,0,0,0,0,83,1,0,0,0,0,85,1,0,0,0,0,87,1,0,0,0,0,89,1,0,
+  	0,0,0,91,1,0,0,0,0,93,1,0,0,0,0,95,1,0,0,0,0,97,1,0,0,0,0,99,1,0,0,0,
+  	0,101,1,0,0,0,0,103,1,0,0,0,0,105,1,0,0,0,0,107,1,0,0,0,0,109,1,0,0,0,
+  	0,121,1,0,0,0,0,123,1,0,0,0,0,125,1,0,0,0,0,129,1,0,0,0,0,131,1,0,0,0,
+  	0,133,1,0,0,0,1,135,1,0,0,0,3,140,1,0,0,0,5,145,1,0,0,0,7,149,1,0,0,0,
+  	9,156,1,0,0,0,11,160,1,0,0,0,13,166,1,0,0,0,15,171,1,0,0,0,17,176,1,0,
+  	0,0,19,182,1,0,0,0,21,187,1,0,0,0,23,190,1,0,0,0,25,195,1,0,0,0,27,199,
+  	1,0,0,0,29,205,1,0,0,0,31,211,1,0,0,0,33,220,1,0,0,0,35,227,1,0,0,0,37,
+  	229,1,0,0,0,39,231,1,0,0,0,41,233,1,0,0,0,43,235,1,0,0,0,45,237,1,0,0,
+  	0,47,240,1,0,0,0,49,242,1,0,0,0,51,245,1,0,0,0,53,247,1,0,0,0,55,250,
+  	1,0,0,0,57,253,1,0,0,0,59,256,1,0,0,0,61,259,1,0,0,0,63,261,1,0,0,0,65,
+  	264,1,0,0,0,67,267,1,0,0,0,69,269,1,0,0,0,71,271,1,0,0,0,73,273,1,0,0,
+  	0,75,275,1,0,0,0,77,277,1,0,0,0,79,280,1,0,0,0,81,283,1,0,0,0,83,285,
+  	1,0,0,0,85,287,1,0,0,0,87,289,1,0,0,0,89,291,1,0,0,0,91,293,1,0,0,0,93,
+  	295,1,0,0,0,95,297,1,0,0,0,97,299,1,0,0,0,99,301,1,0,0,0,101,303,1,0,
+  	0,0,103,305,1,0,0,0,105,311,1,0,0,0,107,317,1,0,0,0,109,321,1,0,0,0,111,
+  	330,1,0,0,0,113,333,1,0,0,0,115,336,1,0,0,0,117,338,1,0,0,0,119,341,1,
+  	0,0,0,121,343,1,0,0,0,123,351,1,0,0,0,125,355,1,0,0,0,127,371,1,0,0,0,
+  	129,374,1,0,0,0,131,380,1,0,0,0,133,397,1,0,0,0,135,136,5,118,0,0,136,
+  	137,5,111,0,0,137,138,5,105,0,0,138,139,5,100,0,0,139,2,1,0,0,0,140,141,
+  	5,98,0,0,141,142,5,111,0,0,142,143,5,111,0,0,143,144,5,108,0,0,144,4,
+  	1,0,0,0,145,146,5,105,0,0,146,147,5,110,0,0,147,148,5,116,0,0,148,6,1,
+  	0,0,0,149,150,5,115,0,0,150,151,5,116,0,0,151,152,5,114,0,0,152,153,5,
+  	105,0,0,153,154,5,110,0,0,154,155,5,103,0,0,155,8,1,0,0,0,156,157,5,110,
+  	0,0,157,158,5,101,0,0,158,159,5,119,0,0,159,10,1,0,0,0,160,161,5,99,0,
+  	0,161,162,5,108,0,0,162,163,5,97,0,0,163,164,5,115,0,0,164,165,5,115,
+  	0,0,165,12,1,0,0,0,166,167,5,110,0,0,167,168,5,117,0,0,168,169,5,108,
+  	0,0,169,170,5,108,0,0,170,14,1,0,0,0,171,172,5,116,0,0,172,173,5,114,
+  	0,0,173,174,5,117,0,0,174,175,5,101,0,0,175,16,1,0,0,0,176,177,5,102,
+  	0,0,177,178,5,97,0,0,178,179,5,108,0,0,179,180,5,115,0,0,180,181,5,101,
+  	0,0,181,18,1,0,0,0,182,183,5,116,0,0,183,184,5,104,0,0,184,185,5,105,
+  	0,0,185,186,5,115,0,0,186,20,1,0,0,0,187,188,5,105,0,0,188,189,5,102,
+  	0,0,189,22,1,0,0,0,190,191,5,101,0,0,191,192,5,108,0,0,192,193,5,115,
+  	0,0,193,194,5,101,0,0,194,24,1,0,0,0,195,196,5,102,0,0,196,197,5,111,
+  	0,0,197,198,5,114,0,0,198,26,1,0,0,0,199,200,5,119,0,0,200,201,5,104,
+  	0,0,201,202,5,105,0,0,202,203,5,108,0,0,203,204,5,101,0,0,204,28,1,0,
+  	0,0,205,206,5,98,0,0,206,207,5,114,0,0,207,208,5,101,0,0,208,209,5,97,
+  	0,0,209,210,5,107,0,0,210,30,1,0,0,0,211,212,5,99,0,0,212,213,5,111,0,
+  	0,213,214,5,110,0,0,214,215,5,116,0,0,215,216,5,105,0,0,216,217,5,110,
+  	0,0,217,218,5,117,0,0,218,219,5,101,0,0,219,32,1,0,0,0,220,221,5,114,
+  	0,0,221,222,5,101,0,0,222,223,5,116,0,0,223,224,5,117,0,0,224,225,5,114,
+  	0,0,225,226,5,110,0,0,226,34,1,0,0,0,227,228,5,43,0,0,228,36,1,0,0,0,
+  	229,230,5,45,0,0,230,38,1,0,0,0,231,232,5,42,0,0,232,40,1,0,0,0,233,234,
+  	5,47,0,0,234,42,1,0,0,0,235,236,5,37,0,0,236,44,1,0,0,0,237,238,5,62,
+  	0,0,238,239,5,61,0,0,239,46,1,0,0,0,240,241,5,62,0,0,241,48,1,0,0,0,242,
+  	243,5,60,0,0,243,244,5,61,0,0,244,50,1,0,0,0,245,246,5,60,0,0,246,52,
+  	1,0,0,0,247,248,5,33,0,0,248,249,5,61,0,0,249,54,1,0,0,0,250,251,5,61,
+  	0,0,251,252,5,61,0,0,252,56,1,0,0,0,253,254,5,38,0,0,254,255,5,38,0,0,
+  	255,58,1,0,0,0,256,257,5,124,0,0,257,258,5,124,0,0,258,60,1,0,0,0,259,
+  	260,5,33,0,0,260,62,1,0,0,0,261,262,5,62,0,0,262,263,5,62,0,0,263,64,
+  	1,0,0,0,264,265,5,60,0,0,265,266,5,60,0,0,266,66,1,0,0,0,267,268,5,38,
+  	0,0,268,68,1,0,0,0,269,270,5,124,0,0,270,70,1,0,0,0,271,272,5,94,0,0,
+  	272,72,1,0,0,0,273,274,5,126,0,0,274,74,1,0,0,0,275,276,5,61,0,0,276,
+  	76,1,0,0,0,277,278,5,43,0,0,278,279,5,43,0,0,279,78,1,0,0,0,280,281,5,
+  	45,0,0,281,282,5,45,0,0,282,80,1,0,0,0,283,284,5,46,0,0,284,82,1,0,0,
+  	0,285,286,5,63,0,0,286,84,1,0,0,0,287,288,5,58,0,0,288,86,1,0,0,0,289,
+  	290,5,40,0,0,290,88,1,0,0,0,291,292,5,41,0,0,292,90,1,0,0,0,293,294,5,
+  	91,0,0,294,92,1,0,0,0,295,296,5,93,0,0,296,94,1,0,0,0,297,298,5,123,0,
+  	0,298,96,1,0,0,0,299,300,5,125,0,0,300,98,1,0,0,0,301,302,5,59,0,0,302,
+  	100,1,0,0,0,303,304,5,44,0,0,304,102,1,0,0,0,305,306,5,102,0,0,306,307,
+  	5,34,0,0,307,308,1,0,0,0,308,309,3,111,55,0,309,310,5,34,0,0,310,104,
+  	1,0,0,0,311,312,5,102,0,0,312,313,5,34,0,0,313,314,1,0,0,0,314,315,3,
+  	111,55,0,315,316,5,36,0,0,316,106,1,0,0,0,317,318,5,36,0,0,318,319,3,
+  	111,55,0,319,320,5,34,0,0,320,108,1,0,0,0,321,322,5,36,0,0,322,323,3,
+  	111,55,0,323,324,5,36,0,0,324,110,1,0,0,0,325,329,3,117,58,0,326,329,
+  	3,127,63,0,327,329,8,0,0,0,328,325,1,0,0,0,328,326,1,0,0,0,328,327,1,
+  	0,0,0,329,332,1,0,0,0,330,328,1,0,0,0,330,331,1,0,0,0,331,112,1,0,0,0,
+  	332,330,1,0,0,0,333,334,5,102,0,0,334,335,5,34,0,0,335,114,1,0,0,0,336,
+  	337,5,34,0,0,337,116,1,0,0,0,338,339,5,36,0,0,339,340,5,36,0,0,340,118,
+  	1,0,0,0,341,342,5,36,0,0,342,120,1,0,0,0,343,347,7,1,0,0,344,346,7,2,
+  	0,0,345,344,1,0,0,0,346,349,1,0,0,0,347,345,1,0,0,0,347,348,1,0,0,0,348,
+  	122,1,0,0,0,349,347,1,0,0,0,350,352,7,3,0,0,351,350,1,0,0,0,352,353,1,
+  	0,0,0,353,351,1,0,0,0,353,354,1,0,0,0,354,124,1,0,0,0,355,360,5,34,0,
+  	0,356,359,3,127,63,0,357,359,8,4,0,0,358,356,1,0,0,0,358,357,1,0,0,0,
+  	359,362,1,0,0,0,360,361,1,0,0,0,360,358,1,0,0,0,361,363,1,0,0,0,362,360,
+  	1,0,0,0,363,364,5,34,0,0,364,126,1,0,0,0,365,366,5,92,0,0,366,372,5,110,
+  	0,0,367,368,5,92,0,0,368,372,5,34,0,0,369,370,5,92,0,0,370,372,5,92,0,
+  	0,371,365,1,0,0,0,371,367,1,0,0,0,371,369,1,0,0,0,372,128,1,0,0,0,373,
+  	375,7,5,0,0,374,373,1,0,0,0,375,376,1,0,0,0,376,374,1,0,0,0,376,377,1,
+  	0,0,0,377,378,1,0,0,0,378,379,6,64,0,0,379,130,1,0,0,0,380,381,5,47,0,
+  	0,381,382,5,47,0,0,382,386,1,0,0,0,383,385,9,0,0,0,384,383,1,0,0,0,385,
+  	388,1,0,0,0,386,387,1,0,0,0,386,384,1,0,0,0,387,390,1,0,0,0,388,386,1,
+  	0,0,0,389,391,5,13,0,0,390,389,1,0,0,0,390,391,1,0,0,0,391,393,1,0,0,
+  	0,392,394,7,6,0,0,393,392,1,0,0,0,394,395,1,0,0,0,395,396,6,65,0,0,396,
+  	132,1,0,0,0,397,398,5,47,0,0,398,399,5,42,0,0,399,403,1,0,0,0,400,402,
+  	9,0,0,0,401,400,1,0,0,0,402,405,1,0,0,0,403,404,1,0,0,0,403,401,1,0,0,
+  	0,404,406,1,0,0,0,405,403,1,0,0,0,406,407,5,42,0,0,407,408,5,47,0,0,408,
+  	409,1,0,0,0,409,410,6,66,0,0,410,134,1,0,0,0,13,0,328,330,347,353,358,
+  	360,371,376,386,390,393,403,1,6,0,0
   };
   staticData->serializedATN = antlr4::atn::SerializedATNView(serializedATNSegment, sizeof(serializedATNSegment) / sizeof(serializedATNSegment[0]));
 
diff --git a/src/semantic/antlr-generated/MXLexer.interp b/src/semantic/antlr-generated/MXLexer.interp
index 38c2569..8a66929 100644
--- a/src/semantic/antlr-generated/MXLexer.interp
+++ b/src/semantic/antlr-generated/MXLexer.interp
@@ -203,4 +203,4 @@ mode names:
 DEFAULT_MODE
 
 atn:
-[4, 0, 61, 410, 6, -1, 2, 0, 7, 0, 2, 1, 7, 1, 2, 2, 7, 2, 2, 3, 7, 3, 2, 4, 7, 4, 2, 5, 7, 5, 2, 6, 7, 6, 2, 7, 7, 7, 2, 8, 7, 8, 2, 9, 7, 9, 2, 10, 7, 10, 2, 11, 7, 11, 2, 12, 7, 12, 2, 13, 7, 13, 2, 14, 7, 14, 2, 15, 7, 15, 2, 16, 7, 16, 2, 17, 7, 17, 2, 18, 7, 18, 2, 19, 7, 19, 2, 20, 7, 20, 2, 21, 7, 21, 2, 22, 7, 22, 2, 23, 7, 23, 2, 24, 7, 24, 2, 25, 7, 25, 2, 26, 7, 26, 2, 27, 7, 27, 2, 28, 7, 28, 2, 29, 7, 29, 2, 30, 7, 30, 2, 31, 7, 31, 2, 32, 7, 32, 2, 33, 7, 33, 2, 34, 7, 34, 2, 35, 7, 35, 2, 36, 7, 36, 2, 37, 7, 37, 2, 38, 7, 38, 2, 39, 7, 39, 2, 40, 7, 40, 2, 41, 7, 41, 2, 42, 7, 42, 2, 43, 7, 43, 2, 44, 7, 44, 2, 45, 7, 45, 2, 46, 7, 46, 2, 47, 7, 47, 2, 48, 7, 48, 2, 49, 7, 49, 2, 50, 7, 50, 2, 51, 7, 51, 2, 52, 7, 52, 2, 53, 7, 53, 2, 54, 7, 54, 2, 55, 7, 55, 2, 56, 7, 56, 2, 57, 7, 57, 2, 58, 7, 58, 2, 59, 7, 59, 2, 60, 7, 60, 2, 61, 7, 61, 2, 62, 7, 62, 2, 63, 7, 63, 2, 64, 7, 64, 2, 65, 7, 65, 2, 66, 7, 66, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 3, 1, 4, 1, 4, 1, 4, 1, 4, 1, 5, 1, 5, 1, 5, 1, 5, 1, 5, 1, 5, 1, 6, 1, 6, 1, 6, 1, 6, 1, 6, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 8, 1, 8, 1, 8, 1, 8, 1, 8, 1, 8, 1, 9, 1, 9, 1, 9, 1, 9, 1, 9, 1, 10, 1, 10, 1, 10, 1, 11, 1, 11, 1, 11, 1, 11, 1, 11, 1, 12, 1, 12, 1, 12, 1, 12, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 13, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 14, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 16, 1, 16, 1, 16, 1, 16, 1, 16, 1, 16, 1, 16, 1, 17, 1, 17, 1, 18, 1, 18, 1, 19, 1, 19, 1, 20, 1, 20, 1, 21, 1, 21, 1, 22, 1, 22, 1, 22, 1, 23, 1, 23, 1, 24, 1, 24, 1, 24, 1, 25, 1, 25, 1, 26, 1, 26, 1, 26, 1, 27, 1, 27, 1, 27, 1, 28, 1, 28, 1, 28, 1, 29, 1, 29, 1, 29, 1, 30, 1, 30, 1, 31, 1, 31, 1, 31, 1, 32, 1, 32, 1, 32, 1, 33, 1, 33, 1, 34, 1, 34, 1, 35, 1, 35, 1, 36, 1, 36, 1, 37, 1, 37, 1, 38, 1, 38, 1, 38, 1, 39, 1, 39, 1, 39, 1, 40, 1, 40, 1, 41, 1, 41, 1, 42, 1, 42, 1, 43, 1, 43, 1, 44, 1, 44, 1, 45, 1, 45, 1, 46, 1, 46, 1, 47, 1, 47, 1, 48, 1, 48, 1, 49, 1, 49, 1, 50, 1, 50, 1, 51, 1, 51, 1, 51, 1, 51, 1, 51, 1, 51, 1, 52, 1, 52, 1, 52, 1, 52, 1, 52, 1, 52, 1, 53, 1, 53, 1, 53, 1, 53, 1, 54, 1, 54, 1, 54, 1, 54, 1, 55, 1, 55, 1, 55, 5, 55, 329, 8, 55, 10, 55, 12, 55, 332, 9, 55, 1, 56, 1, 56, 1, 56, 1, 57, 1, 57, 1, 58, 1, 58, 1, 58, 1, 59, 1, 59, 1, 60, 1, 60, 5, 60, 346, 8, 60, 10, 60, 12, 60, 349, 9, 60, 1, 61, 4, 61, 352, 8, 61, 11, 61, 12, 61, 353, 1, 62, 1, 62, 1, 62, 5, 62, 359, 8, 62, 10, 62, 12, 62, 362, 9, 62, 1, 62, 1, 62, 1, 63, 1, 63, 1, 63, 1, 63, 1, 63, 1, 63, 3, 63, 372, 8, 63, 1, 64, 4, 64, 375, 8, 64, 11, 64, 12, 64, 376, 1, 64, 1, 64, 1, 65, 1, 65, 1, 65, 1, 65, 5, 65, 385, 8, 65, 10, 65, 12, 65, 388, 9, 65, 1, 65, 3, 65, 391, 8, 65, 1, 65, 1, 65, 1, 65, 1, 65, 1, 66, 1, 66, 1, 66, 1, 66, 5, 66, 401, 8, 66, 10, 66, 12, 66, 404, 9, 66, 1, 66, 1, 66, 1, 66, 1, 66, 1, 66, 3, 360, 386, 402, 0, 67, 1, 1, 3, 2, 5, 3, 7, 4, 9, 5, 11, 6, 13, 7, 15, 8, 17, 9, 19, 10, 21, 11, 23, 12, 25, 13, 27, 14, 29, 15, 31, 16, 33, 17, 35, 18, 37, 19, 39, 20, 41, 21, 43, 22, 45, 23, 47, 24, 49, 25, 51, 26, 53, 27, 55, 28, 57, 29, 59, 30, 61, 31, 63, 32, 65, 33, 67, 34, 69, 35, 71, 36, 73, 37, 75, 38, 77, 39, 79, 40, 81, 41, 83, 42, 85, 43, 87, 44, 89, 45, 91, 46, 93, 47, 95, 48, 97, 49, 99, 50, 101, 51, 103, 52, 105, 53, 107, 54, 109, 55, 111, 0, 113, 0, 115, 0, 117, 0, 119, 0, 121, 56, 123, 57, 125, 58, 127, 0, 129, 59, 131, 60, 133, 61, 1, 0, 6, 3, 0, 34, 34, 36, 36, 92, 92, 2, 0, 65, 90, 97, 122, 4, 0, 48, 57, 65, 90, 95, 95, 97, 122, 1, 0, 48, 57, 2, 0, 34, 34, 92, 92, 3, 0, 9, 10, 13, 13, 32, 32, 416, 0, 1, 1, 0, 0, 0, 0, 3, 1, 0, 0, 0, 0, 5, 1, 0, 0, 0, 0, 7, 1, 0, 0, 0, 0, 9, 1, 0, 0, 0, 0, 11, 1, 0, 0, 0, 0, 13, 1, 0, 0, 0, 0, 15, 1, 0, 0, 0, 0, 17, 1, 0, 0, 0, 0, 19, 1, 0, 0, 0, 0, 21, 1, 0, 0, 0, 0, 23, 1, 0, 0, 0, 0, 25, 1, 0, 0, 0, 0, 27, 1, 0, 0, 0, 0, 29, 1, 0, 0, 0, 0, 31, 1, 0, 0, 0, 0, 33, 1, 0, 0, 0, 0, 35, 1, 0, 0, 0, 0, 37, 1, 0, 0, 0, 0, 39, 1, 0, 0, 0, 0, 41, 1, 0, 0, 0, 0, 43, 1, 0, 0, 0, 0, 45, 1, 0, 0, 0, 0, 47, 1, 0, 0, 0, 0, 49, 1, 0, 0, 0, 0, 51, 1, 0, 0, 0, 0, 53, 1, 0, 0, 0, 0, 55, 1, 0, 0, 0, 0, 57, 1, 0, 0, 0, 0, 59, 1, 0, 0, 0, 0, 61, 1, 0, 0, 0, 0, 63, 1, 0, 0, 0, 0, 65, 1, 0, 0, 0, 0, 67, 1, 0, 0, 0, 0, 69, 1, 0, 0, 0, 0, 71, 1, 0, 0, 0, 0, 73, 1, 0, 0, 0, 0, 75, 1, 0, 0, 0, 0, 77, 1, 0, 0, 0, 0, 79, 1, 0, 0, 0, 0, 81, 1, 0, 0, 0, 0, 83, 1, 0, 0, 0, 0, 85, 1, 0, 0, 0, 0, 87, 1, 0, 0, 0, 0, 89, 1, 0, 0, 0, 0, 91, 1, 0, 0, 0, 0, 93, 1, 0, 0, 0, 0, 95, 1, 0, 0, 0, 0, 97, 1, 0, 0, 0, 0, 99, 1, 0, 0, 0, 0, 101, 1, 0, 0, 0, 0, 103, 1, 0, 0, 0, 0, 105, 1, 0, 0, 0, 0, 107, 1, 0, 0, 0, 0, 109, 1, 0, 0, 0, 0, 121, 1, 0, 0, 0, 0, 123, 1, 0, 0, 0, 0, 125, 1, 0, 0, 0, 0, 129, 1, 0, 0, 0, 0, 131, 1, 0, 0, 0, 0, 133, 1, 0, 0, 0, 1, 135, 1, 0, 0, 0, 3, 140, 1, 0, 0, 0, 5, 145, 1, 0, 0, 0, 7, 149, 1, 0, 0, 0, 9, 156, 1, 0, 0, 0, 11, 160, 1, 0, 0, 0, 13, 166, 1, 0, 0, 0, 15, 171, 1, 0, 0, 0, 17, 176, 1, 0, 0, 0, 19, 182, 1, 0, 0, 0, 21, 187, 1, 0, 0, 0, 23, 190, 1, 0, 0, 0, 25, 195, 1, 0, 0, 0, 27, 199, 1, 0, 0, 0, 29, 205, 1, 0, 0, 0, 31, 211, 1, 0, 0, 0, 33, 220, 1, 0, 0, 0, 35, 227, 1, 0, 0, 0, 37, 229, 1, 0, 0, 0, 39, 231, 1, 0, 0, 0, 41, 233, 1, 0, 0, 0, 43, 235, 1, 0, 0, 0, 45, 237, 1, 0, 0, 0, 47, 240, 1, 0, 0, 0, 49, 242, 1, 0, 0, 0, 51, 245, 1, 0, 0, 0, 53, 247, 1, 0, 0, 0, 55, 250, 1, 0, 0, 0, 57, 253, 1, 0, 0, 0, 59, 256, 1, 0, 0, 0, 61, 259, 1, 0, 0, 0, 63, 261, 1, 0, 0, 0, 65, 264, 1, 0, 0, 0, 67, 267, 1, 0, 0, 0, 69, 269, 1, 0, 0, 0, 71, 271, 1, 0, 0, 0, 73, 273, 1, 0, 0, 0, 75, 275, 1, 0, 0, 0, 77, 277, 1, 0, 0, 0, 79, 280, 1, 0, 0, 0, 81, 283, 1, 0, 0, 0, 83, 285, 1, 0, 0, 0, 85, 287, 1, 0, 0, 0, 87, 289, 1, 0, 0, 0, 89, 291, 1, 0, 0, 0, 91, 293, 1, 0, 0, 0, 93, 295, 1, 0, 0, 0, 95, 297, 1, 0, 0, 0, 97, 299, 1, 0, 0, 0, 99, 301, 1, 0, 0, 0, 101, 303, 1, 0, 0, 0, 103, 305, 1, 0, 0, 0, 105, 311, 1, 0, 0, 0, 107, 317, 1, 0, 0, 0, 109, 321, 1, 0, 0, 0, 111, 330, 1, 0, 0, 0, 113, 333, 1, 0, 0, 0, 115, 336, 1, 0, 0, 0, 117, 338, 1, 0, 0, 0, 119, 341, 1, 0, 0, 0, 121, 343, 1, 0, 0, 0, 123, 351, 1, 0, 0, 0, 125, 355, 1, 0, 0, 0, 127, 371, 1, 0, 0, 0, 129, 374, 1, 0, 0, 0, 131, 380, 1, 0, 0, 0, 133, 396, 1, 0, 0, 0, 135, 136, 5, 118, 0, 0, 136, 137, 5, 111, 0, 0, 137, 138, 5, 105, 0, 0, 138, 139, 5, 100, 0, 0, 139, 2, 1, 0, 0, 0, 140, 141, 5, 98, 0, 0, 141, 142, 5, 111, 0, 0, 142, 143, 5, 111, 0, 0, 143, 144, 5, 108, 0, 0, 144, 4, 1, 0, 0, 0, 145, 146, 5, 105, 0, 0, 146, 147, 5, 110, 0, 0, 147, 148, 5, 116, 0, 0, 148, 6, 1, 0, 0, 0, 149, 150, 5, 115, 0, 0, 150, 151, 5, 116, 0, 0, 151, 152, 5, 114, 0, 0, 152, 153, 5, 105, 0, 0, 153, 154, 5, 110, 0, 0, 154, 155, 5, 103, 0, 0, 155, 8, 1, 0, 0, 0, 156, 157, 5, 110, 0, 0, 157, 158, 5, 101, 0, 0, 158, 159, 5, 119, 0, 0, 159, 10, 1, 0, 0, 0, 160, 161, 5, 99, 0, 0, 161, 162, 5, 108, 0, 0, 162, 163, 5, 97, 0, 0, 163, 164, 5, 115, 0, 0, 164, 165, 5, 115, 0, 0, 165, 12, 1, 0, 0, 0, 166, 167, 5, 110, 0, 0, 167, 168, 5, 117, 0, 0, 168, 169, 5, 108, 0, 0, 169, 170, 5, 108, 0, 0, 170, 14, 1, 0, 0, 0, 171, 172, 5, 116, 0, 0, 172, 173, 5, 114, 0, 0, 173, 174, 5, 117, 0, 0, 174, 175, 5, 101, 0, 0, 175, 16, 1, 0, 0, 0, 176, 177, 5, 102, 0, 0, 177, 178, 5, 97, 0, 0, 178, 179, 5, 108, 0, 0, 179, 180, 5, 115, 0, 0, 180, 181, 5, 101, 0, 0, 181, 18, 1, 0, 0, 0, 182, 183, 5, 116, 0, 0, 183, 184, 5, 104, 0, 0, 184, 185, 5, 105, 0, 0, 185, 186, 5, 115, 0, 0, 186, 20, 1, 0, 0, 0, 187, 188, 5, 105, 0, 0, 188, 189, 5, 102, 0, 0, 189, 22, 1, 0, 0, 0, 190, 191, 5, 101, 0, 0, 191, 192, 5, 108, 0, 0, 192, 193, 5, 115, 0, 0, 193, 194, 5, 101, 0, 0, 194, 24, 1, 0, 0, 0, 195, 196, 5, 102, 0, 0, 196, 197, 5, 111, 0, 0, 197, 198, 5, 114, 0, 0, 198, 26, 1, 0, 0, 0, 199, 200, 5, 119, 0, 0, 200, 201, 5, 104, 0, 0, 201, 202, 5, 105, 0, 0, 202, 203, 5, 108, 0, 0, 203, 204, 5, 101, 0, 0, 204, 28, 1, 0, 0, 0, 205, 206, 5, 98, 0, 0, 206, 207, 5, 114, 0, 0, 207, 208, 5, 101, 0, 0, 208, 209, 5, 97, 0, 0, 209, 210, 5, 107, 0, 0, 210, 30, 1, 0, 0, 0, 211, 212, 5, 99, 0, 0, 212, 213, 5, 111, 0, 0, 213, 214, 5, 110, 0, 0, 214, 215, 5, 116, 0, 0, 215, 216, 5, 105, 0, 0, 216, 217, 5, 110, 0, 0, 217, 218, 5, 117, 0, 0, 218, 219, 5, 101, 0, 0, 219, 32, 1, 0, 0, 0, 220, 221, 5, 114, 0, 0, 221, 222, 5, 101, 0, 0, 222, 223, 5, 116, 0, 0, 223, 224, 5, 117, 0, 0, 224, 225, 5, 114, 0, 0, 225, 226, 5, 110, 0, 0, 226, 34, 1, 0, 0, 0, 227, 228, 5, 43, 0, 0, 228, 36, 1, 0, 0, 0, 229, 230, 5, 45, 0, 0, 230, 38, 1, 0, 0, 0, 231, 232, 5, 42, 0, 0, 232, 40, 1, 0, 0, 0, 233, 234, 5, 47, 0, 0, 234, 42, 1, 0, 0, 0, 235, 236, 5, 37, 0, 0, 236, 44, 1, 0, 0, 0, 237, 238, 5, 62, 0, 0, 238, 239, 5, 61, 0, 0, 239, 46, 1, 0, 0, 0, 240, 241, 5, 62, 0, 0, 241, 48, 1, 0, 0, 0, 242, 243, 5, 60, 0, 0, 243, 244, 5, 61, 0, 0, 244, 50, 1, 0, 0, 0, 245, 246, 5, 60, 0, 0, 246, 52, 1, 0, 0, 0, 247, 248, 5, 33, 0, 0, 248, 249, 5, 61, 0, 0, 249, 54, 1, 0, 0, 0, 250, 251, 5, 61, 0, 0, 251, 252, 5, 61, 0, 0, 252, 56, 1, 0, 0, 0, 253, 254, 5, 38, 0, 0, 254, 255, 5, 38, 0, 0, 255, 58, 1, 0, 0, 0, 256, 257, 5, 124, 0, 0, 257, 258, 5, 124, 0, 0, 258, 60, 1, 0, 0, 0, 259, 260, 5, 33, 0, 0, 260, 62, 1, 0, 0, 0, 261, 262, 5, 62, 0, 0, 262, 263, 5, 62, 0, 0, 263, 64, 1, 0, 0, 0, 264, 265, 5, 60, 0, 0, 265, 266, 5, 60, 0, 0, 266, 66, 1, 0, 0, 0, 267, 268, 5, 38, 0, 0, 268, 68, 1, 0, 0, 0, 269, 270, 5, 124, 0, 0, 270, 70, 1, 0, 0, 0, 271, 272, 5, 94, 0, 0, 272, 72, 1, 0, 0, 0, 273, 274, 5, 126, 0, 0, 274, 74, 1, 0, 0, 0, 275, 276, 5, 61, 0, 0, 276, 76, 1, 0, 0, 0, 277, 278, 5, 43, 0, 0, 278, 279, 5, 43, 0, 0, 279, 78, 1, 0, 0, 0, 280, 281, 5, 45, 0, 0, 281, 282, 5, 45, 0, 0, 282, 80, 1, 0, 0, 0, 283, 284, 5, 46, 0, 0, 284, 82, 1, 0, 0, 0, 285, 286, 5, 63, 0, 0, 286, 84, 1, 0, 0, 0, 287, 288, 5, 58, 0, 0, 288, 86, 1, 0, 0, 0, 289, 290, 5, 40, 0, 0, 290, 88, 1, 0, 0, 0, 291, 292, 5, 41, 0, 0, 292, 90, 1, 0, 0, 0, 293, 294, 5, 91, 0, 0, 294, 92, 1, 0, 0, 0, 295, 296, 5, 93, 0, 0, 296, 94, 1, 0, 0, 0, 297, 298, 5, 123, 0, 0, 298, 96, 1, 0, 0, 0, 299, 300, 5, 125, 0, 0, 300, 98, 1, 0, 0, 0, 301, 302, 5, 59, 0, 0, 302, 100, 1, 0, 0, 0, 303, 304, 5, 44, 0, 0, 304, 102, 1, 0, 0, 0, 305, 306, 5, 102, 0, 0, 306, 307, 5, 34, 0, 0, 307, 308, 1, 0, 0, 0, 308, 309, 3, 111, 55, 0, 309, 310, 5, 34, 0, 0, 310, 104, 1, 0, 0, 0, 311, 312, 5, 102, 0, 0, 312, 313, 5, 34, 0, 0, 313, 314, 1, 0, 0, 0, 314, 315, 3, 111, 55, 0, 315, 316, 5, 36, 0, 0, 316, 106, 1, 0, 0, 0, 317, 318, 5, 36, 0, 0, 318, 319, 3, 111, 55, 0, 319, 320, 5, 34, 0, 0, 320, 108, 1, 0, 0, 0, 321, 322, 5, 36, 0, 0, 322, 323, 3, 111, 55, 0, 323, 324, 5, 36, 0, 0, 324, 110, 1, 0, 0, 0, 325, 329, 3, 117, 58, 0, 326, 329, 3, 127, 63, 0, 327, 329, 8, 0, 0, 0, 328, 325, 1, 0, 0, 0, 328, 326, 1, 0, 0, 0, 328, 327, 1, 0, 0, 0, 329, 332, 1, 0, 0, 0, 330, 328, 1, 0, 0, 0, 330, 331, 1, 0, 0, 0, 331, 112, 1, 0, 0, 0, 332, 330, 1, 0, 0, 0, 333, 334, 5, 102, 0, 0, 334, 335, 5, 34, 0, 0, 335, 114, 1, 0, 0, 0, 336, 337, 5, 34, 0, 0, 337, 116, 1, 0, 0, 0, 338, 339, 5, 36, 0, 0, 339, 340, 5, 36, 0, 0, 340, 118, 1, 0, 0, 0, 341, 342, 5, 36, 0, 0, 342, 120, 1, 0, 0, 0, 343, 347, 7, 1, 0, 0, 344, 346, 7, 2, 0, 0, 345, 344, 1, 0, 0, 0, 346, 349, 1, 0, 0, 0, 347, 345, 1, 0, 0, 0, 347, 348, 1, 0, 0, 0, 348, 122, 1, 0, 0, 0, 349, 347, 1, 0, 0, 0, 350, 352, 7, 3, 0, 0, 351, 350, 1, 0, 0, 0, 352, 353, 1, 0, 0, 0, 353, 351, 1, 0, 0, 0, 353, 354, 1, 0, 0, 0, 354, 124, 1, 0, 0, 0, 355, 360, 5, 34, 0, 0, 356, 359, 3, 127, 63, 0, 357, 359, 8, 4, 0, 0, 358, 356, 1, 0, 0, 0, 358, 357, 1, 0, 0, 0, 359, 362, 1, 0, 0, 0, 360, 361, 1, 0, 0, 0, 360, 358, 1, 0, 0, 0, 361, 363, 1, 0, 0, 0, 362, 360, 1, 0, 0, 0, 363, 364, 5, 34, 0, 0, 364, 126, 1, 0, 0, 0, 365, 366, 5, 92, 0, 0, 366, 372, 5, 110, 0, 0, 367, 368, 5, 92, 0, 0, 368, 372, 5, 34, 0, 0, 369, 370, 5, 92, 0, 0, 370, 372, 5, 92, 0, 0, 371, 365, 1, 0, 0, 0, 371, 367, 1, 0, 0, 0, 371, 369, 1, 0, 0, 0, 372, 128, 1, 0, 0, 0, 373, 375, 7, 5, 0, 0, 374, 373, 1, 0, 0, 0, 375, 376, 1, 0, 0, 0, 376, 374, 1, 0, 0, 0, 376, 377, 1, 0, 0, 0, 377, 378, 1, 0, 0, 0, 378, 379, 6, 64, 0, 0, 379, 130, 1, 0, 0, 0, 380, 381, 5, 47, 0, 0, 381, 382, 5, 47, 0, 0, 382, 386, 1, 0, 0, 0, 383, 385, 9, 0, 0, 0, 384, 383, 1, 0, 0, 0, 385, 388, 1, 0, 0, 0, 386, 387, 1, 0, 0, 0, 386, 384, 1, 0, 0, 0, 387, 390, 1, 0, 0, 0, 388, 386, 1, 0, 0, 0, 389, 391, 5, 13, 0, 0, 390, 389, 1, 0, 0, 0, 390, 391, 1, 0, 0, 0, 391, 392, 1, 0, 0, 0, 392, 393, 5, 10, 0, 0, 393, 394, 1, 0, 0, 0, 394, 395, 6, 65, 0, 0, 395, 132, 1, 0, 0, 0, 396, 397, 5, 47, 0, 0, 397, 398, 5, 42, 0, 0, 398, 402, 1, 0, 0, 0, 399, 401, 9, 0, 0, 0, 400, 399, 1, 0, 0, 0, 401, 404, 1, 0, 0, 0, 402, 403, 1, 0, 0, 0, 402, 400, 1, 0, 0, 0, 403, 405, 1, 0, 0, 0, 404, 402, 1, 0, 0, 0, 405, 406, 5, 42, 0, 0, 406, 407, 5, 47, 0, 0, 407, 408, 1, 0, 0, 0, 408, 409, 6, 66, 0, 0, 409, 134, 1, 0, 0, 0, 12, 0, 328, 330, 347, 353, 358, 360, 371, 376, 386, 390, 402, 1, 6, 0, 0]
\ No newline at end of file
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\ No newline at end of file
diff --git a/src/semantic/visitor.cpp b/src/semantic/visitor.cpp
index 597aaba..be134c0 100644
--- a/src/semantic/visitor.cpp
+++ b/src/semantic/visitor.cpp
@@ -238,9 +238,9 @@ std::any Visitor::visitClass_var_def(MXParser::Class_var_defContext *context) {
     member_var_def->vars.push_back(std::make_pair(id->getText(), nullptr));
     std::cerr << std::string(nodetype_stk.size() * 2, ' ') << "recorded member variable name is " << id->getText()
               << std::endl;
-    // if (!member_var_def->current_scope->add_variable(id->getText(), member_var_def->var_type)) {
-    //   throw SemanticError("Variable name " + id->getText() + " is not available", 1);
-    // }
+    if (!member_var_def->current_scope->add_variable(id->getText(), member_var_def->var_type)) {
+      throw SemanticError("Variable name " + id->getText() + " is not available", 1);
+    }
   }
 
   nodetype_stk.pop_back();