/// <summary>
/// Constructs a case based on a regular expression.
/// </summary>
/// <param name="regex"> The regex for condition.</param>
/// <param name="selector"> The contextual selector for the case.</param>
public RegexCase(Regex regex, ContextualSelector <string, R> selector)
{
SetField.CheckNull(nameof(selector), selector);
this.Selector = selector;
SetField.NotNull(out this.Regex, nameof(regex), regex);
this.Condition = this.IsMatch;
}
/// <summary>
/// Constructs a case.
/// </summary>
/// <param name="condition"> The condition of the case.</param>
/// <param name="selector"> The contextual selector of the case.</param>
public Case(Func <T, bool> condition, ContextualSelector <T, R> selector)
{
SetField.CheckNull(nameof(condition), condition);
this.Condition = condition;
SetField.CheckNull(nameof(selector), selector);
this.Selector = selector;
}
/// <summary>
/// Constructs the default case for switch.
/// </summary>
/// <param name="selector"> The contextual selector that will be called in default case.</param>
public DefaultCase(ContextualSelector <T, R> selector)
: base(obj => true, selector)
{
}
/// <summary>
/// Constructs a case to use as the default.
/// </summary>
/// <typeparam name="T"> The type of incoming value to case.</typeparam>
/// <typeparam name="R"> The type of the object returned by selector.</typeparam>
/// <param name="selector"> The contextual selector of the case.</param>
/// <returns>The case.</returns>
public static ICase <T, R> Default <T, R>(ContextualSelector <T, R> selector)
{
return(new DefaultCase <T, R>(selector));
}
/// <summary>
/// Constructs a case based on a regular expression.
/// </summary>
/// <typeparam name="R"> The type of the object returned by selector.</typeparam>
/// <param name="regex"> The regex for condition.</param>
/// <param name="selector"> The contextual selector for the case.</param>
/// <returns>The case.</returns>
public static ICase <string, R> Case <R>(Regex regex, ContextualSelector <string, R> selector)
{
return(new RegexCase <R>(regex, selector));
}
/// <summary>
/// Constructs a case.
/// </summary>
/// <typeparam name="T"> The type of incoming value to case.</typeparam>
/// <typeparam name="R"> The type of the object returned by selector.</typeparam>
/// <param name="condition"> The condition of the case.</param>
/// <param name="selector"> The contextual selector of the case.</param>
/// <returns></returns>
public static ICase <T, R> Case <T, R>(Func <T, bool> condition, ContextualSelector <T, R> selector)
{
return(new Case <T, R>(condition, selector));
}
