internal static ExpressionSyntax OnlyReturn(SyntaxNodeAnalysisContext context, string ident, AttributeSyntax att, SyntaxList <StatementSyntax> statements)
{
var only = statements.Only();
if (only == null)
{
Diagnostic(context, ident, att.GetLocation(), statements.Count + " statements");
return(null);
}
var ret = only as ReturnStatementSyntax;
if (ret == null)
{
Diagnostic(context, ident, only.GetLocation(), "no return");
return(null);
}
if (ret.Expression == null)
{
Diagnostic(context, ident, only.GetLocation(), "no return expression");
return(null);
}
return(ret.Expression);
}