public void Add(DfmProperty property)
{
if (!ReferenceEquals(null, property))
{
Properties.Add(property);
}
}
public static DfmObject Execute(List <Token> tokens)
{
Logger.WriteLn($"DfmParser is executing...received: {tokens.Count} tokens");
var objCount = 0;
var stack = new Stack <DfmObject>();
var queue = new Queue <Token>(tokens);
DfmObject obj = null;
DfmProperty property = null;
while (queue.Count > 0)
{
var token = queue.Dequeue();
if (token is Keyword kw)
{
if (kw.IntroducesAnObject)
{
var name = queue.Dequeue();
var type = queue.Dequeue();
Guard.Ensure
.IsTrue(name is Literal, $"Line {name.LineNumber}: expected a literal.")
.IsTrue(type is Literal, $"Line {name.LineNumber}: expected a literal.");
obj = new DfmObject(name, type);
++objCount;
if (stack.Count > 0)
{
stack.Peek().Add(obj);
}
stack.Push(obj);
}
if (kw.IsEnd)
{
Guard.Ensure.IsTrue(stack.Count > 0, "Unexpected end statement");
obj = stack.Pop();
}
property = null;
continue;
}
if (token is Identifier)
{
Guard.Ensure.NotNull(obj);
var op = queue.Dequeue();
var value = queue.Dequeue();
Guard.Ensure
.IsTrue(op is Operator)
.IsTrue(value is Literal);
property = new DfmProperty(token, new DfmValue(value));
obj?.Add(property);
continue;
}
if (token is Literal)
{
Guard.Ensure
.NotNull(obj)
.NotNull(property);
property?.Add(new DfmValue(token));
}
}
Guard.Ensure
.IsTrue(stack.Count == 0)
.NotNull(obj);
Logger.WriteLn($"DfmParser is finished...{objCount} objects created." + Environment.NewLine);
return(obj);
}