protected override ITypeSymbol GetQueryClauseInfo(
SemanticModel semanticModel,
SyntaxNode node,
CancellationToken cancellationToken)
{
var query = node.AncestorsAndSelf().OfType<QueryExpressionSyntax>().First();
if (InfoBoundSuccessfully(semanticModel.GetQueryClauseInfo(query.FromClause, cancellationToken)))
{
return null;
}
foreach (var clause in query.Body.Clauses)
{
if (InfoBoundSuccessfully(semanticModel.GetQueryClauseInfo(clause, cancellationToken)))
{
return null;
}
}
if (InfoBoundSuccessfully(semanticModel.GetSymbolInfo(query.Body.SelectOrGroup, cancellationToken)))
{
return null;
}
var fromClause = query.FromClause;
return semanticModel.GetTypeInfo(fromClause.Expression, cancellationToken).Type;
}
internal override bool QueryClauseLambdasTypeEquivalent(SemanticModel oldModel, SyntaxNode oldNode, SemanticModel newModel, SyntaxNode newNode, CancellationToken cancellationToken)
{
switch (oldNode.Kind())
{
case SyntaxKind.FromClause:
case SyntaxKind.LetClause:
case SyntaxKind.WhereClause:
case SyntaxKind.OrderByClause:
case SyntaxKind.JoinClause:
var oldQueryClauseInfo = oldModel.GetQueryClauseInfo((QueryClauseSyntax)oldNode, cancellationToken);
var newQueryClauseInfo = newModel.GetQueryClauseInfo((QueryClauseSyntax)newNode, cancellationToken);
return MemberSignaturesEquivalent(oldQueryClauseInfo.CastInfo.Symbol, newQueryClauseInfo.CastInfo.Symbol) &&
MemberSignaturesEquivalent(oldQueryClauseInfo.OperationInfo.Symbol, newQueryClauseInfo.OperationInfo.Symbol);
case SyntaxKind.AscendingOrdering:
case SyntaxKind.DescendingOrdering:
var oldOrderingInfo = oldModel.GetSymbolInfo(oldNode, cancellationToken);
var newOrderingInfo = newModel.GetSymbolInfo(newNode, cancellationToken);
return MemberSignaturesEquivalent(oldOrderingInfo.Symbol, newOrderingInfo.Symbol);
case SyntaxKind.SelectClause:
var oldSelectInfo = oldModel.GetSymbolInfo(oldNode, cancellationToken);
var newSelectInfo = newModel.GetSymbolInfo(newNode, cancellationToken);
// Changing reduced select clause to a non-reduced form or vice versa
// adds/removes a call to Select method, which is a supported change.
return oldSelectInfo.Symbol == null ||
newSelectInfo.Symbol == null ||
MemberSignaturesEquivalent(oldSelectInfo.Symbol, newSelectInfo.Symbol);
case SyntaxKind.GroupClause:
var oldGroupByInfo = oldModel.GetSymbolInfo(oldNode, cancellationToken);
var newGroupByInfo = newModel.GetSymbolInfo(newNode, cancellationToken);
return MemberSignaturesEquivalent(oldGroupByInfo.Symbol, newGroupByInfo.Symbol, GroupBySignatureComparer);
default:
return true;
}
}
internal override bool QueryClauseLambdasTypeEquivalent(SemanticModel oldModel, SyntaxNode oldNode, SemanticModel newModel, SyntaxNode newNode, CancellationToken cancellationToken)
{
switch (oldNode.Kind())
{
case SyntaxKind.FromClause:
case SyntaxKind.LetClause:
case SyntaxKind.WhereClause:
case SyntaxKind.OrderByClause:
case SyntaxKind.JoinClause:
var oldQueryClauseInfo = oldModel.GetQueryClauseInfo((QueryClauseSyntax)oldNode, cancellationToken);
var newQueryClauseInfo = newModel.GetQueryClauseInfo((QueryClauseSyntax)newNode, cancellationToken);
return MemberSignaturesEquivalent(oldQueryClauseInfo.CastInfo.Symbol, newQueryClauseInfo.CastInfo.Symbol) &&
MemberSignaturesEquivalent(oldQueryClauseInfo.OperationInfo.Symbol, newQueryClauseInfo.OperationInfo.Symbol);
case SyntaxKind.AscendingOrdering:
case SyntaxKind.DescendingOrdering:
case SyntaxKind.SelectClause:
case SyntaxKind.GroupClause:
var oldSymbolInfo = oldModel.GetSymbolInfo(oldNode, cancellationToken);
var newSymbolInfo = newModel.GetSymbolInfo(newNode, cancellationToken);
return MemberSignaturesEquivalent(oldSymbolInfo.Symbol, newSymbolInfo.Symbol);
default:
return true;
}
}
