private CallExpression ReadFirstExpressionContent()
{
var fnExpression = new CallExpression();
var tknFunctionName = Reader.DiscardToken(TokenType.First);
Reader.DiscardToken(TokenType.OpenParenthesis);
fnExpression.Name = "First";
var cursor = Reader.Marker.Clone();
//Create a predicate untill the closing of the function
var isKeyword = Filters.Keyword(cursor);
var isSameLevelComma = Filters.SameLevel(cursor, TokenType.Comma);
var isSameLevelClosingBracket = Filters.SameLevel(cursor, TokenType.CloseBracket);
var semiColonBreak = Filters.SameLevel(cursor, TokenType.Semicolon);
var newLineBreak = Filters.SameLevel(cursor, TokenType.NewLine);
var isExpressionBreak = new Predicate <TokenMarker>((x) =>
{
return(semiColonBreak(x) || newLineBreak(x) || isSameLevelClosingBracket(x) || isKeyword(x) || isSameLevelComma(x));
});
while (!Reader.IsComplete && !isExpressionBreak(Reader.Marker))
{
ParameterExpression fnParameter = ReadFunctionParameter();
fnExpression.AddParameter(fnParameter);
if (Reader.Current.TokenType == TokenType.Comma)
{
Reader.DiscardToken();
}
}
return(fnExpression);
}
private AggregateJobTree AddAggregateTreeFromField(NameExpression expression)
{
Clean();
_expVisitor.Clear();
var firstCallExpression = new CallExpression()
{
Name = "first"
};
firstCallExpression.AddParameter(new ParameterExpression(expression));
var firstGrpStage = AddAggregateTreeFromCall(firstCallExpression);
//var outputTree = _expVisitor.AggregateTree.Clone();
return(firstGrpStage);
}
/// <summary>
///
/// </summary>
/// <returns></returns>
public CallExpression ReadFunctionCall()
{
var f = new CallExpression();
var tknFunctionName = Reader.DiscardToken(TokenType.Symbol);
Reader.DiscardToken(TokenType.OpenParenthesis);
f.Name = tknFunctionName.Value;
var cursor = Reader.Marker.Clone();
//Create a predicate untill the closing of the function
var fnEndPredicate = DonutSyntaxReader.Filters.FunctionCallEnd(cursor);
while (!Reader.IsComplete && !fnEndPredicate(Reader.Marker))
{
ParameterExpression fnParameter = ReadFunctionParameter();
f.AddParameter(fnParameter);
if (Reader.Current.TokenType == TokenType.Comma)
{
Reader.DiscardToken();
}
}
Reader.DiscardToken(TokenType.CloseParenthesis);
return(f);
}