public static bool TryScan(CodeReader reader, out Import import)
{
import = null;
bool result = Import.TryScan(reader, out IScanable scanned);
if (result)
{
import = (Import)scanned;
}
return(result);
}
public static Presentation Parse(CodeReader reader)
{
CodeReader r = reader.Copy();
Presentation presentation = new Presentation();
DefinitionCollection dc = DefinitionCollection.Create(r);
r = dc.CreateReader(r);
while (!r.Done)
{
var line = r.NextLine();
if (Import.TryScan(r.Copy(), out Import import))
{
presentation.AddImport(import);
r.Skip(import.LineLength - 1);
}
else if (Style.TryScan(r.Copy(), out Style style))
{
presentation.AddStyle(style);
r.Skip(style.LineLength - 1);
}
else if (Interactive.TryScan(r.Copy(), out Interactive interactive))
{
presentation.AddInteractive(interactive);
r.Skip(interactive.LineLength - 1);
}
else if (Pattern.TryScan(r.Copy(), out Pattern pattern))
{
presentation.AddPattern(pattern);
r.Skip(pattern.LineLength - 1);
}
else if (Slide.TryScan(r.Copy(), presentation, out Slide slide))
{
presentation.AddSlide(slide);
r.Skip(slide.LineLength - 1);
}
else
{
throw new Exception("Unknown Command in Line " + r.CurrentLine + ": " + r.PeekLine());
}
Console.WriteLine(line);
}
return(presentation);
}