public programNode program()
{
var token = lexer.GetToken();
if (token.Id == 3)
{
var text = "";
var arg0 = function();
text += arg0.Text;
var arg1 = program();
text += arg1.Text;
var result = new programNode(text, null, arg0, arg1);
result.function = arg0;
result.program = arg1;
result.res = result.function.res + result.program.res;
token = lexer.GetToken();
if (token.Id != -1)
{
throw new ParserException("Got unxpected token from lexer");
}
return(result);
}
if (token.Id == 4)
{
var text = "";
var arg0 = var();
text += arg0.Text;
var arg1 = program();
text += arg1.Text;
var result = new programNode(text, null, arg0, arg1);
result.var = arg0;
result.program = arg1;
result.res = result.var.res + result.program.res;
token = lexer.GetToken();
if (token.Id != -1)
{
throw new ParserException("Got unxpected token from lexer");
}
return(result);
}
if (true)
{
var text = "";
var result = new programNode(text, null);
result.res = EmptyStr;
token = lexer.GetToken();
if (token.Id != -1)
{
throw new ParserException("Got unxpected token from lexer");
}
return(result);
}
throw new ParserException("Got unxpected token from lexer");
//return null
}
public int VisitProgram(programNode program)
{
List <expressionNode> expressions = new List <expressionNode>();
var cur = program.expressionStatement;
while (cur != null)
{
expressions.Add(cur.expression);
cur = cur.expressionStatement;
}
foreach (var e in expressions)
{
VisitExpression(e);
}
return(0);
}