internal YamlToken CheckDuplicate(string propName, int currentLine)
{
int oldLine;
if (_previousProperties.TryGetValue(propName, out oldLine))
{
// Key is already present.
return(YamlToken.NewError(default(SourceLocation), $"Property '{propName}' is already defined on line {oldLine}."));
}
_previousProperties.Add(propName, currentLine);
return(null);
}
private YamlToken Error(LineParser line, string message)
{
return(YamlToken.NewError(this.Loc(line), message));
}
