/// <summary>
/// Returns this list as a <see cref="Microsoft.CodeAnalysis.SeparatedSyntaxList<TNode>"/>.
/// </summary>
/// <typeparam name="TOther">The type of the list elements in the separated list.</typeparam>
/// <returns></returns>
internal static SeparatedSyntaxList <TOther> AsSeparatedList <TOther>(this SyntaxNodeOrTokenList list) where TOther : SyntaxNode
{
var builder = SeparatedSyntaxListBuilder <TOther> .Create();
foreach (var i in list)
{
var node = i.AsNode();
if (node != null)
{
builder.Add((TOther)node);
}
else
{
builder.AddSeparator(i.AsToken());
}
}
return(builder.ToList());
}
/// <summary>
/// Creates a separated list of nodes from a sequence of nodes and a sequence of separator tokens.
/// </summary>
/// <typeparam name="TNode">The specific type of the element nodes.</typeparam>
/// <param name="nodes">A sequence of syntax nodes.</param>
/// <param name="separators">A sequence of token to be interleaved between the nodes. The number of tokens must
/// be one less than the number of nodes.</param>
public virtual SeparatedSyntaxList <TNode> SeparatedList <TNode>(IEnumerable <TNode> nodes, IEnumerable <SyntaxToken> separators) where TNode : SyntaxNode
{
// Interleave the nodes and the separators. The number of separators must be equal to or 1 less than the number of nodes or
// an argument exception is thrown.
if (nodes != null)
{
IEnumerator <TNode> enumerator = nodes.GetEnumerator();
SeparatedSyntaxListBuilder <TNode> builder = SeparatedSyntaxListBuilder <TNode> .Create();
if (separators != null)
{
foreach (SyntaxToken token in separators)
{
if (!enumerator.MoveNext())
{
throw new ArgumentException($"{nameof(nodes)} must not be empty.", nameof(nodes));
}
builder.Add(enumerator.Current);
builder.AddSeparator(token);
}
}
if (enumerator.MoveNext())
{
builder.Add(enumerator.Current);
if (enumerator.MoveNext())
{
throw new ArgumentException($"{nameof(separators)} must have 1 fewer element than {nameof(nodes)}", nameof(separators));
}
}
return(builder.ToList());
}
if (separators != null)
{
throw new ArgumentException($"When {nameof(nodes)} is null, {nameof(separators)} must also be null.", nameof(separators));
}
return(default(SeparatedSyntaxList <TNode>));
}