Listing 10.9

Listing 10.9.cs

public IEnumerable<CodeIssue> GetIssues(IDocument document, CommonSyntaxNode node, CancellationToken cancellationToken)
{
    var tokens = from nodeOrToken in node.ChildNodesAndTokens()
                    where nodeOrToken.IsToken
                    select nodeOrToken.AsToken();

    foreach (var token in tokens)
    {
        var tokenText = token.ToString();

        if (tokenText.Contains('a'))
        {
            var issueDescription = string.Format("'{0}' contains the letter 'a'", tokenText);
            yield return new CodeIssue(CodeIssueKind.Warning, token.Span, issueDescription);
        }
    }
}