improve the variable stack

src/astx/base.py

@@ -46,7 +46,8 @@ class ASTKind(Enum):
 
     # variables
     VariableKind = -10
-    VarKind = -11  # var keyword for variable declaration
+    VarDeclKind = -11
+    VarAssignKind = -12
 
     # operators
     UnaryOpKind = -20

src/astx/datatypes.py

@@ -128,6 +128,11 @@ def get_struct(self) -> ReprStruct:
 # Data Types
 
 
+@public
+class Any(DataTypeOps):
+    """Generic data type expression."""
+
+
 @public
 class Number(DataTypeOps):
     """Number data type expression."""

src/astx/variables.py

@@ -45,7 +45,27 @@ def __init__(
         self.var_names = var_names
         self.type_name = type_name
         self.body = body
-        self.kind = ASTKind.VarKind
+        self.kind = ASTKind.VarDeclKind
+
+
+@public
+class VarAssignment(StatementType):
+    """AST class for variable declaration."""
+
+    var_names: tuple[str, ...]
+    body: Block
+
+    def __init__(
+        self,
+        var_names: tuple[str, ...],
+        body: Block,
+        loc: SourceLocation = SourceLocation(0, 0),
+    ) -> None:
+        """Initialize the VarExprAST instance."""
+        self.loc = loc
+        self.var_names = var_names
+        self.body = body
+        self.kind = ASTKind.VarAssignKind
 
 
 @public
@@ -58,8 +78,6 @@ class Variable(DataTypeOps):
     def __init__(
         self,
         name: str,
-        type_: ExprType,
-        value: DataType,
         loc: SourceLocation = SourceLocation(0, 0),
     ) -> None:
         """Initialize the Variable instance."""