/// <summary>
/// Builds a new <see cref="DateTimeExpression"/> with both <paramref name="date"/> and <paramref name="time"/>
/// specified.
/// </summary>
/// <param name="date">date part of the expression</param>
/// <param name="time">time part of the expression</param>
/// <param name="offset">offset with the UTC time</param>
/// <exception cref="ArgumentException">if both <paramref name="date"/> and <paramref name="time"/> are <c>null</c>.</exception>
public DateTimeExpression(DateExpression date, TimeExpression time, OffsetExpression offset)
{
if (date is null && time is null)
{
throw new ArgumentException($"Both {nameof(date)} and {nameof(time)} cannot be null and ");
}
Date = date;
Time = time;
Offset = offset;
Kind = offset is not null
? DateTimeExpressionKind.Utc
: DateTimeExpressionKind.Unspecified;
_lazyEscapedParseableString = new(() => (date, time, offset) switch
{
({ }, { }, { }) => $"{date.EscapedParseableString}T{time.EscapedParseableString}{offset.EscapedParseableString}",
/// <summary>
/// Builds a new <see cref="DateTimeExpression"/> with both <paramref name="date"/> and <paramref name="time"/>
/// specified.
/// </summary>
/// <param name="date">date part of the expression</param>
/// <param name="time">time part of the expression</param>
/// <exception cref="ArgumentException">if both <paramref name="date"/> and <paramref name="time"/> are <c>null</c>.</exception>
public DateTimeExpression(DateExpression date, TimeExpression time) : this(date, time, null)
{
}
/// <summary>
/// Builds a new <see cref="DateTimeExpression"/> where only the <see cref="Time"/> part is specified
/// </summary>
/// <param name="time"></param>
/// <exception cref="ArgumentNullException">if <paramref name="time"/> is <c>null</c>.</exception>
public DateTimeExpression(TimeExpression time) : this(null, time)
{
}
