/// <summary>
/// Creates a copy of the given RegExp object. All properties except <see cref="lastIndex"/>
/// will be copied.
/// </summary>
/// <param name="re">The RegExp object of which to create a copy.</param>
public ASRegExp(ASRegExp re)
{
m_internalRegex = re.m_internalRegex;
m_auxFlags = re.m_auxFlags;
m_groupNames = re.m_groupNames;
m_groupCount = re.m_groupCount;
m_source = re.m_source;
}
/// <summary>
/// Used for lazily constructing a RegExp instance with constant pattern and flags
/// strings in code generated by the ABC compiler.
/// </summary>
///
/// <param name="pattern">The regular expression pattern string.</param>
/// <param name="flags">The flags string of the regular expression.</param>
/// <param name="location">A reference that holds the lazily constructed object.</param>
///
/// <returns>If the value at <paramref name="location"/> is not null, returns a new
/// <see cref="ASRegExp"/> that uses the same pattern and flags as that object.
/// Otherwise, constructs a new instance from <paramref name="pattern"/> and
/// <paramref name="flags"/>, stores it in <paramref name="location"/> and
/// returns it.</returns>
public static ASRegExp lazyConstructRegExp(string pattern, string flags, ref ASRegExp location)
{
ASRegExp value = Volatile.Read(ref location);
if (value == null)
{
value = new ASRegExp(pattern, flags);
Volatile.Write(ref location, value);
}
else
{
value = new ASRegExp(value);
}
return(value);
}