private async Task <Document> InvertForAsync(Document document, ForStatementSyntax @for, CancellationToken c)
{
if (InvertForAnalyzer.IsPostIncrement(@for.Incrementors[0]))
{
return(await ConvertToDecrementingCounterForLoop(document, @for));
}
return(await ConvertToIncrementingCounterForLoop(document, @for));
}
static SeparatedSyntaxList <ExpressionSyntax> ToggleIncrement(ForStatementSyntax @for)
{
var incrementor = (PostfixUnaryExpressionSyntax)@for.Incrementors[0];
var newIncrementor = SyntaxFactory.PostfixUnaryExpression(
InvertForAnalyzer.IsPostIncrement(incrementor) ? SyntaxKind.PostDecrementExpression : SyntaxKind.PostIncrementExpression,
incrementor.Operand);
return(new SeparatedSyntaxList <ExpressionSyntax>().Add(newIncrementor));
}