internal override void AppendCodeString(StringBuilder res, PythonAst ast, CodeFormattingOptions format)
{
SliceStart?.AppendCodeString(res, ast, format);
if (!this.IsIncompleteNode(ast))
{
format.Append(res, format.SpaceBeforeSliceColon, " ", string.Empty, this.GetPreceedingWhiteSpaceDefaultNull(ast) ?? "");
res.Append(':');
if (SliceStop != null)
{
string ws = null;
if (format.SpaceAfterSliceColon.HasValue)
{
ws = string.Empty;
format.Append(res, format.SpaceAfterSliceColon, " ", string.Empty, string.Empty);
}
SliceStop.AppendCodeString(res, ast, format, ws);
}
if (StepProvided)
{
format.Append(res, format.SpaceBeforeSliceColon, " ", string.Empty, this.GetSecondWhiteSpaceDefaultNull(ast) ?? "");
res.Append(':');
if (SliceStep != null)
{
string ws = null;
if (format.SpaceAfterSliceColon.HasValue)
{
ws = string.Empty;
format.Append(res, format.SpaceAfterSliceColon, " ", string.Empty, string.Empty);
}
SliceStep.AppendCodeString(res, ast, format, ws);
}
}
}
}
public override void Walk(PythonWalker walker)
{
if (walker.Walk(this))
{
SliceStart?.Walk(walker);
SliceStop?.Walk(walker);
SliceStep?.Walk(walker);
}
walker.PostWalk(this);
}
public override void SetLeadingWhiteSpace(PythonAst ast, string whiteSpace)
{
if (SliceStart != null)
{
SliceStart.SetLeadingWhiteSpace(ast, whiteSpace);
}
else
{
base.SetLeadingWhiteSpace(ast, whiteSpace);
}
}
public override async Task WalkAsync(PythonWalkerAsync walker, CancellationToken cancellationToken = default)
{
if (await walker.WalkAsync(this, cancellationToken))
{
if (SliceStart != null)
{
await SliceStart.WalkAsync(walker, cancellationToken);
}
if (SliceStop != null)
{
await SliceStop.WalkAsync(walker, cancellationToken);
}
if (SliceStep != null)
{
await SliceStep.WalkAsync(walker, cancellationToken);
}
}
await walker.PostWalkAsync(this, cancellationToken);
}
private void ParseStartLength(out bool startOk, out long sliceStart,
out bool lengthOk, out long sliceLength)
{
startOk = lengthOk = true;
if (string.IsNullOrEmpty(SliceStart))
{
sliceStart = 0;
}
else if (Number.TryParseLong(SliceStart.Trim(), out sliceStart, out int unused1))
{
if (sliceStart < 0 || sliceStart >= mFileLength)
{
startOk = false;
}
}
else
{
startOk = false;
}
if (string.IsNullOrEmpty(SliceLength))
{
sliceLength = mFileLength - sliceStart;
if (sliceLength < 0)
{
sliceLength = 0;
}
}
else if (Number.TryParseLong(SliceLength.Trim(), out sliceLength, out int unused2))
{
if (sliceLength <= 0 || sliceLength > mFileLength ||
sliceStart + sliceLength > mFileLength)
{
lengthOk = false;
}
}
else
{
lengthOk = false;
}
}
public override string GetLeadingWhiteSpace(PythonAst ast) => SliceStart != null?SliceStart.GetLeadingWhiteSpace(ast) : this.GetPreceedingWhiteSpace(ast);
