/// <summary>
/// Constructs a CharsTrie reader instance.
/// </summary>
/// <remarks>
/// The <see cref="ICharSequence"/> must contain a copy of a char sequence from the <see cref="CharsTrieBuilder"/>,
/// with the offset indicating the first char of that sequence.
/// The <see cref="CharsTrie"/> object will not read more chars than
/// the <see cref="CharsTrieBuilder"/> generated in the corresponding
/// <see cref="CharsTrieBuilder.Build(StringTrieBuilder.Option)"/> call.
/// <para/>
/// The <see cref="ICharSequence"/> is not copied/cloned and must not be modified while
/// the <see cref="CharsTrie"/> object is in use.
/// </remarks>
/// <param name="trieChars"><see cref="ICharSequence"/> that contains the serialized trie.</param>
/// <param name="offset">Root offset of the trie in the <see cref="ICharSequence"/>.</param>
/// <stable>ICU 4.8</stable>
internal CharsTrie(ICharSequence trieChars, int offset)
{
chars_ = trieChars.ToCharSequence();
pos_ = root_ = offset;
remainingMatchLength_ = -1;
}
