/// <summary>
/// Create a new binary message node.
/// </summary>
/// <param name="parent">The parent message sequence node that defines this message node.</param>
/// <param name="token">Token containing the message selector.</param>
protected internal BinaryMessageNode(MessageSequenceBase parent, BinarySelectorToken token)
: base(parent)
{
#if DEBUG
if (token == null)
throw new ArgumentNullException("token");
#endif
this.SelectorToken = token;
}
/// <summary>
/// Create a new message node.
/// </summary>
/// <param name="parent">The parent message sequence node that defines this message node.</param>
protected MessageNode(MessageSequenceBase parent)
{
#if DEBUG
if (parent == null)
{
throw new ArgumentNullException("parent");
}
#endif
this.Parent = parent;
}
/// <summary>
/// Create and initialize a new unary message node.
/// </summary>
/// <param name="parent">The parent message sequence node that defines this message node.</param>
/// <param name="token">Token containing the message selector.</param>
protected internal UnaryMessageNode(MessageSequenceBase parent, IdentifierToken token)
: base(parent)
{
#if DEBUG
if (token == null)
{
throw new ArgumentNullException("token");
}
#endif
this.SelectorToken = token;
}
/// <summary>
/// Create a new message node.
/// </summary>
/// <param name="parent">The parent message sequence node that defines this message node.</param>
protected MessageNode(MessageSequenceBase parent)
{
#if DEBUG
if (parent == null)
throw new ArgumentNullException("parent");
#endif
this.Parent = parent;
}
protected virtual UnaryMessageNode ParseUnaryMessage(MessageSequenceBase parent, IdentifierToken token)
{
// PARSE: <unary message> ::= unarySelector
return new UnaryMessageNode(parent, token);
}
protected virtual BinaryMessageNode ParseBinaryMessage(MessageSequenceBase parent, BinarySelectorToken selector)
{
// PARSE: <binary message> ::= binarySelector <binary argument>
BinaryMessageNode result = new BinaryMessageNode(parent, selector);
Token token = this.GetNextTokenxx(Preference.NegativeSign);
// Parse the binary argument ... ParseBinaryArgument() does not fail and reports errors self.
BinaryArgumentNode argument = this.ParseBinaryArgument(result, token);
if (argument != null)
result.SetContents(argument);
return result;
}
