/// <summary>
/// Create and initialize a new assignment expression.
/// </summary>
/// <param name="parent">Parent node that defines this expression.</param>
/// <param name="identifier">Identifier token of the assignment target.</param>
/// <param name="token">Token representing the assignment operator.</param>
protected internal AssignmentNode(SemanticNode parent, IdentifierToken identifier, AssignmentOperatorToken token)
: base(parent)
{
#if DEBUG
if (identifier == null)
throw new ArgumentNullException("identifier");
if (token == null)
throw new ArgumentNullException("token");
#endif
this.Target = new AssignmentTargetNode(this, identifier);
this.AssignmentOperator = token;
}
protected virtual AssignmentNode ParseAssignment(SemanticNode parent, IdentifierToken identifier, AssignmentOperatorToken assignmentOperator)
{
// PARSE: <assignment> ::= <assignment target> assignmentOperator <expression>
// <assignment target> := identifier
AssignmentNode result = new AssignmentNode(parent, identifier, assignmentOperator);
Token token = this.GetNextTokenxx(Preference.NegativeSign);
ExpressionNode expression = this.ParseExpression(result, token);
if (expression == null)
this.ReportParserError(result, SemanticErrors.MissingExpression, token);
else
result.SetContents(expression);
return result;
}