// parameter -> FUNCTION func_op param_op
// parameter -> value param_op
private void parameter(ParametersExpression parametersExpression)
{
if (_lookahead.TokenType == TokenTypes.Function)
{
// parameter -> FUNCTION func_op param_op
String function = _lookahead.Sequence;
nextToken();
ParametersExpression nestedParameters = funcOp();
var functionExpression = new FunctionExpression(function, nestedParameters);
parametersExpression.NestedExpression = functionExpression.NestedExpression;
paramOp(parametersExpression);
}
else
{
// parameter -> value param_op
FieldOperatorNode fieldOperatorNode = paramOp(parametersExpression);
fieldOperatorNode.Value = value();
parametersExpression.AddParameter(fieldOperatorNode);
}
}
// and_term -> CRITERIA field_op
// and_term -> FUNCTION func_op
// and_term -> argument
private IExpression andTerm()
{
if (_lookahead.TokenType == TokenTypes.Criteria)
{
// and_term -> CRITERIA field_op
String criteria = _lookahead.Sequence;
nextToken();
FieldOperatorNode fieldOperator = fieldOp();
return(new CriteriaExpression(criteria, fieldOperator));
}
if (_lookahead.TokenType == TokenTypes.Function)
{
// and_term -> FUNCTION func_op
String function = _lookahead.Sequence;
nextToken();
ParametersExpression parametersExpression = funcOp();
return(new FunctionExpression(function, parametersExpression));
}
// and_term -> argument
return(argument());
}
public CriteriaExpression(String criteriaName, FieldOperatorNode fieldOperator)
{
Name = criteriaName;
Operator = fieldOperator.FieldOperator;
Value = fieldOperator.Value;
}
public void AddParameter(FieldOperatorNode parameter)
{
_fieldOperatorNodes.Insert(0, parameter);
}