internal static ParseStep Fail(RegexNode node, State initialState, State currentState, string additionalMessage = null)
{
return(new ParseStep
{
Type = ParseStepType.Fail,
Node = node,
InitialState = initialState,
CurrentState = currentState
}.WithMessage(step => (additionalMessage != null ? additionalMessage + ": " : "") + node.GetFailMessage(step.InitialState)));
}
