/// <summary>
/// Constructs a new instance of the <see cref="CursorSubject{T}" /> class.
/// </summary>
/// <param name="isForwardOnly"><see langword="True"/> if the cursor can only be moved forward;
/// otherwise, <see langword="false"/>.</param>
public CursorSubject(bool isForwardOnly)
{
cursor = new ObservableCursor <T>(isForwardOnly, enableBranchOptimizations: isForwardOnly);
}
/// <summary>
/// Constructs a new instance of the <see cref="CursorSubject{T}" /> class.
/// </summary>
/// <param name="isForwardOnly"><see langword="True"/> if the cursor can only be moved forward;
/// otherwise, <see langword="false"/>.</param>
/// <param name="enableBranchOptimizations">Specifies whether a forward-only cursor is allowed to truncate the buffered
/// sequence, if necessary, whenever a branch is moved. In the future, it may control other kinds of branch optimizations
/// as well. The default value is <see langword="true"/>.</param>
public CursorSubject(bool isForwardOnly, bool enableBranchOptimizations)
{
Contract.Requires(isForwardOnly || !enableBranchOptimizations);
cursor = new ObservableCursor <T>(isForwardOnly, enableBranchOptimizations);
}
/// <summary>
/// Constructs a new instance of the <see cref="CursorSubject{T}" /> class with bidirectional behavior.
/// </summary>
public CursorSubject()
{
cursor = new ObservableCursor <T>(isForwardOnly: false, enableBranchOptimizations: false);
}