private static MethodCallExpressionParseInfo CreateParseInfoWithGroupNode(
MethodCallExpressionParseInfo parseInfo,
LambdaExpression keySelector,
LambdaExpression elementSelectorOrResultSelector,
LambdaExpression resultSelectorOrNull)
{
var optionalElementSelector = GetOptionalElementSelector(elementSelectorOrResultSelector, resultSelectorOrNull);
var sourceItemType = ReflectionUtility.GetItemTypeOfClosedGenericIEnumerable(
parseInfo.ParsedExpression.Arguments[0].Type,
"parseInfo.ParsedExpression.Arguments[0].Type");
MethodCallExpression simulatedGroupByCallWithoutResultSelector;
if (optionalElementSelector == null)
{
simulatedGroupByCallWithoutResultSelector = Expression.Call(
typeof(Enumerable),
"GroupBy",
new[] { sourceItemType, keySelector.Body.Type },
parseInfo.ParsedExpression.Arguments[0],
keySelector);
}
else
{
simulatedGroupByCallWithoutResultSelector = Expression.Call(
typeof(Enumerable),
"GroupBy",
new[] { sourceItemType, keySelector.Body.Type, optionalElementSelector.Body.Type },
parseInfo.ParsedExpression.Arguments[0],
keySelector,
optionalElementSelector);
}
var simulatedParseInfo = new MethodCallExpressionParseInfo(parseInfo.AssociatedIdentifier, parseInfo.Source, simulatedGroupByCallWithoutResultSelector);
var groupBySourceNode = new GroupByExpressionNode(simulatedParseInfo, keySelector, optionalElementSelector);
return(new MethodCallExpressionParseInfo(parseInfo.AssociatedIdentifier, groupBySourceNode, parseInfo.ParsedExpression));
}
private static MethodCallExpressionParseInfo CreateParseInfoWithGroupNode (
MethodCallExpressionParseInfo parseInfo,
LambdaExpression keySelector,
LambdaExpression elementSelectorOrResultSelector,
LambdaExpression resultSelectorOrNull)
{
var optionalElementSelector = GetOptionalElementSelector (elementSelectorOrResultSelector, resultSelectorOrNull);
var sourceItemType = ReflectionUtility.GetItemTypeOfClosedGenericIEnumerable (
parseInfo.ParsedExpression.Arguments[0].Type,
"parseInfo.ParsedExpression.Arguments[0].Type");
MethodCallExpression simulatedGroupByCallWithoutResultSelector;
if (optionalElementSelector == null)
{
simulatedGroupByCallWithoutResultSelector = Expression.Call (
typeof (Enumerable),
"GroupBy",
new[] { sourceItemType, keySelector.Body.Type },
parseInfo.ParsedExpression.Arguments[0],
keySelector);
}
else
{
simulatedGroupByCallWithoutResultSelector = Expression.Call (
typeof (Enumerable),
"GroupBy",
new[] { sourceItemType, keySelector.Body.Type, optionalElementSelector.Body.Type },
parseInfo.ParsedExpression.Arguments[0],
keySelector,
optionalElementSelector);
}
var simulatedParseInfo = new MethodCallExpressionParseInfo(parseInfo.AssociatedIdentifier, parseInfo.Source, simulatedGroupByCallWithoutResultSelector);
var groupBySourceNode = new GroupByExpressionNode (simulatedParseInfo, keySelector, optionalElementSelector);
return new MethodCallExpressionParseInfo (parseInfo.AssociatedIdentifier, groupBySourceNode, parseInfo.ParsedExpression);
}
