private void CalculateTypeForNodes(IAstNode exprNode)
{
if (exprNode.AstNodeType == AstNodeTypes.BinaryOperator)
{
var binOpNode = exprNode.AsBinaryOp();
CalculateTypeForNodes(binOpNode.LeftOperand);
binOpNode.TypeName = binOpNode.LeftOperand.AsNodeWithType().TypeName;
CalculateTypeForNodes(binOpNode.RightOperand);
}
else if (exprNode.AstNodeType == AstNodeTypes.UnaryOperator)
{
CalculateTypeForNodes(exprNode.AsUnaryOp().Operand);
}
else if (exprNode.AstNodeType == AstNodeTypes.VarReference)
{
var varRef = exprNode.AsVarReferene();
if (!_symbolTable.ContainsKey(varRef.Name))
{
throw new SemanticErrorException($"Variable '{varRef.Name}' is not declared.", exprNode);
}
exprNode.AsVarReferene().TypeName = _symbolTable[varRef.Name];
}
}