// ICU4N specific - de-nested State and renamed CharsTrieState
/// <summary>
/// Saves the state of this trie.
/// </summary>
/// <param name="state">The <see cref="CharsTrieState"/> object to hold the trie's state.</param>
/// <returns>This.</returns>
/// <see cref="ResetToState(CharsTrieState)"/>
/// <stable>ICU 4.8</stable>
public CharsTrie SaveState(CharsTrieState state) /*const*/
{
state.Chars = chars_;
state.Root = root_;
state.Pos = pos_;
state.RemainingMatchLength = remainingMatchLength_;
return(this);
}
/// <summary>
/// Resets this trie to the saved state.
/// </summary>
/// <param name="state">The State object which holds a saved trie state.</param>
/// <returns>This.</returns>
/// <exception cref="ArgumentException">If the state object contains no state,
/// or the state of a different trie.</exception>
/// <seealso cref="SaveState(CharsTrieState)"/>
/// <seealso cref="Reset()"/>
/// <stable>ICU 4.8</stable>
public CharsTrie ResetToState(CharsTrieState state)
{
if (chars_ == state.Chars && chars_ != null && root_ == state.Root)
{
pos_ = state.Pos;
remainingMatchLength_ = state.RemainingMatchLength;
}
else
{
throw new ArgumentException("incompatible trie state");
}
return(this);
}