private DirectiveTriviaSyntax GetPreviousPossiblyRelatedDirective()
{
DirectiveTriviaSyntax d = this;
while (d != null)
{
d = d.GetPreviousDirective();
if (d != null)
{
// skip matched sets
switch (d.Kind())
{
case SyntaxKind.EndIfDirectiveTrivia:
while (d != null && d.Kind() != SyntaxKind.IfDirectiveTrivia)
{
d = d.GetPreviousRelatedDirective();
}
continue;
case SyntaxKind.EndRegionDirectiveTrivia:
while (d != null && d.Kind() != SyntaxKind.RegionDirectiveTrivia)
{
d = d.GetPreviousRelatedDirective();
}
continue;
}
}
return(d);
}
return(null);
}
private static bool IsActiveConditionalDirective(DirectiveTriviaSyntax directive)
{
switch (directive.Kind())
{
case SyntaxKind.DefineDirectiveTrivia:
return(((DefineDirectiveTriviaSyntax)directive).IsActive);
case SyntaxKind.UndefDirectiveTrivia:
return(((UndefDirectiveTriviaSyntax)directive).IsActive);
default:
return(false);
}
}
private static bool HasRelatedDirectives(DirectiveTriviaSyntax directive)
{
switch (directive.Kind())
{
case SyntaxKind.IfDirectiveTrivia:
case SyntaxKind.ElseDirectiveTrivia:
case SyntaxKind.ElifDirectiveTrivia:
case SyntaxKind.EndIfDirectiveTrivia:
case SyntaxKind.RegionDirectiveTrivia:
case SyntaxKind.EndRegionDirectiveTrivia:
return(true);
default:
return(false);
}
}
private DirectiveTriviaSyntax GetPreviousRelatedDirective()
{
DirectiveTriviaSyntax d = this;
switch (d.Kind())
{
case SyntaxKind.EndIfDirectiveTrivia:
while (d != null)
{
switch (d.Kind())
{
case SyntaxKind.IfDirectiveTrivia:
case SyntaxKind.ElifDirectiveTrivia:
case SyntaxKind.ElseDirectiveTrivia:
return(d);
}
d = d.GetPreviousPossiblyRelatedDirective();
}
break;
case SyntaxKind.ElifDirectiveTrivia:
d = d.GetPreviousPossiblyRelatedDirective();
while (d != null)
{
switch (d.Kind())
{
case SyntaxKind.IfDirectiveTrivia:
case SyntaxKind.ElifDirectiveTrivia:
return(d);
}
d = d.GetPreviousPossiblyRelatedDirective();
}
break;
case SyntaxKind.ElseDirectiveTrivia:
while (d != null)
{
switch (d.Kind())
{
case SyntaxKind.IfDirectiveTrivia:
case SyntaxKind.ElifDirectiveTrivia:
return(d);
}
d = d.GetPreviousPossiblyRelatedDirective();
}
break;
case SyntaxKind.EndRegionDirectiveTrivia:
while (d != null)
{
if (d.Kind() == SyntaxKind.RegionDirectiveTrivia)
{
return(d);
}
d = d.GetPreviousPossiblyRelatedDirective();
}
break;
}
return(null);
}
