private Statements ReadIfs(Statements statements)
{
// 1. Find first .IF
var firstIf = statements.FirstOrDefault(statement => statement is Control c && c.Name.ToLower() == "if");
if (firstIf == null)
{
return(statements);
}
var firstIfIndex = statements.IndexOf(firstIf);
var result = (Statements)statements.Clone();
// 2. Find matching .ENDIF
var matchedEndIfIndex = FindFirstMatched(result, firstIfIndex + 1, "endif");
if (matchedEndIfIndex == statements.Count)
{
Validation.Reading.Add(new ValidationEntry(ValidationEntrySource.Reader, ValidationEntryLevel.Error, "Cannot find matched .endif"));
return(result);
}
// 3. Compute result of .if
var ifResultStatements = ComputeIfResult(result, firstIfIndex, matchedEndIfIndex);
// 4.Replace .if statements with its result
result.Replace(firstIfIndex, matchedEndIfIndex, ifResultStatements);
// 5. Do it again.
result = ReadIfs(result);
return(result);
}
public PositioningToggleState Clone()
{
var cloned = new PositioningToggleState();
cloned.Statements = Statements.Clone();
cloned.Bullets = Bullets.Clone();
return(cloned);
}