private void ExpandIdentifier(Node node)
{
if (node.Children.Count == 1 && node.Children[0].TokenType == TokenType.Identifier)
{
//identifier -> identifier != null ? attrib
node.AddChild(TokenType.NotEqualTo);
Node values = node.AddChild(TokenType.Values);
values.AddChild(TokenType.Null);
node.AddChild(TokenType.Question);
Node expressions = node.AddChild(TokenType.Expressions);
Node expression = expressions.AddChild(TokenType.Expression);
expression.AddChild(TokenType.Attrib, node.Children[0].Text);
}
}
private void ExpandIdentifierEqualToValue(Node node)
{
if (node.Children.Count == 3
&& node.Children[0].TokenType == TokenType.Identifier
&& (node.Children[1].TokenType == TokenType.EqualTo || node.Children[1].TokenType == TokenType.NotEqualTo)
&& node.Children[2].TokenType == TokenType.Values)
{
//identifier=text -> identifier=text?{identifier}
node.AddChild(TokenType.Question);
Node expressions = node.AddChild(TokenType.Expressions);
Node expression = expressions.AddChild(TokenType.Expression);
expression.AddChild(TokenType.Attrib, node.Children[0].Text);
}
}
private Node ConsumeAs(Node node, TokenType expectedTokenType, TokenType asTokenType)
{
if (IsTokenType(expectedTokenType))
{
var ret = node.AddChild(asTokenType, _currentToken.Text);
Next();
return ret;
}
throw new Exception("Expected " + expectedTokenType);
}
private Node ConsumeAs(Node node, TokenType tokenType)
{
var ret = node.AddChild(tokenType, _currentToken.Text);
Next();
return ret;
}
private Node Add(Node parent, TokenType tokenType, string text = "")
{
return parent.AddChild(tokenType, text);
}