private List <NovelInstruction> ParseAssignment(string text)
{
//Splitting the text by assignment operator
var textByAssignOp = text.Split('=');
//Getting the left value
var leftValue = textByAssignOp[0].Trim();
//Check if variable is declared
bool containsDeclaration = false;
//If contains the var to declare variable
if (leftValue.IndexOf("var ") == 0 || leftValue.IndexOf("var\t") == 0)
{
leftValue = leftValue.Substring(3).Trim();
containsDeclaration = true;
}
//Validate the name of variable
if (!ValidateName(leftValue))
{
throw new NovelException("Invalid variable name " + leftValue + ".", ParsedFile, ParsedLine);
}
//If contains declaration
if (containsDeclaration)
{
if (Variables.ContainsVariable(leftValue))
{
throw new NovelException("Variable " + leftValue + " already exists.", ParsedFile, ParsedLine);
}
else
{
Variables.AddVaraible(leftValue);
}
}
//if does not contains declaration
else
{
if (!Variables.ContainsVariable(leftValue))
{
throw new NovelException("Variable " + leftValue + " does not exists in this scope.", ParsedFile, ParsedLine);
}
}
//Getting the rvalue (right side)
//var rightValue = StringUtils.RemoveSpaces(textByAssignOp[1]).Trim();
var rightValue = textByAssignOp[1].Trim();
var expressionString = leftValue + "=" + rightValue;
var instructions = ParseExpression(expressionString);
instructions.Insert(0, new NovelExpandStack(1));
return(instructions);
}
