private BoundExpression MakeTupleFieldAccessAndReportUseSiteDiagnostics(BoundExpression tuple, SyntaxNode syntax, FieldSymbol field)
{
// Use default field rather than implicitly named fields since
// fields from inferred names are not usable in C# 7.0.
field = field.CorrespondingTupleField ?? field;
DiagnosticInfo useSiteInfo = field.GetUseSiteDiagnostic();
if ((object)useSiteInfo != null && useSiteInfo.Severity == DiagnosticSeverity.Error)
{
Symbol.ReportUseSiteDiagnostic(useSiteInfo, _diagnostics, syntax.Location);
}
return(MakeTupleFieldAccess(syntax, field, tuple, null, LookupResultKind.Empty));
}
// This returns accessors and may create a temp for the tuple, but will not create temps for the tuple elements.
private ImmutableArray <BoundExpression> AccessTupleFields(BoundExpression expression, ArrayBuilder <LocalSymbol> temps,
ArrayBuilder <BoundExpression> effects)
{
Debug.Assert(expression.Type.IsTupleType);
var tupleType = expression.Type;
var tupleElementTypes = tupleType.TupleElementTypes;
var numElements = tupleElementTypes.Length;
// save the target as we need to access it multiple times
BoundExpression tuple;
if (CanChangeValueBetweenReads(expression, localsMayBeAssignedOrCaptured: true))
{
BoundAssignmentOperator assignmentToTemp;
BoundLocal savedTuple = _factory.StoreToTemp(expression, out assignmentToTemp);
effects.Add(assignmentToTemp);
temps.Add(savedTuple.LocalSymbol);
tuple = savedTuple;
}
else
{
tuple = expression;
}
// list the tuple fields accessors
var fields = tupleType.TupleElements;
var builder = ArrayBuilder <BoundExpression> .GetInstance(numElements);
for (int i = 0; i < numElements; i++)
{
var field = fields[i];
DiagnosticInfo useSiteInfo = field.GetUseSiteDiagnostic();
if ((object)useSiteInfo != null && useSiteInfo.Severity == DiagnosticSeverity.Error)
{
Symbol.ReportUseSiteDiagnostic(useSiteInfo, _diagnostics, expression.Syntax.Location);
}
var fieldAccess = MakeTupleFieldAccess(expression.Syntax, field, tuple, null, LookupResultKind.Empty);
builder.Add(fieldAccess);
}
return(builder.ToImmutableAndFree());
}
private bool TryGetSpecialTypeMember <TSymbol>(CSharpSyntaxNode syntax, SpecialMember specialMember, out TSymbol symbol) where TSymbol : Symbol
{
symbol = (TSymbol)this.compilation.Assembly.GetSpecialTypeMember(specialMember);
if ((object)symbol == null)
{
MemberDescriptor descriptor = SpecialMembers.GetDescriptor(specialMember);
diagnostics.Add(ErrorCode.ERR_MissingPredefinedMember, syntax.Location, descriptor.DeclaringTypeMetadataName, descriptor.Name);
return(false);
}
else
{
var useSiteDiagnostic = symbol.GetUseSiteDiagnosticForSymbolOrContainingType();
if (useSiteDiagnostic != null)
{
Symbol.ReportUseSiteDiagnostic(useSiteDiagnostic, diagnostics, new SourceLocation(syntax));
}
}
return(true);
}
protected override bool ReportUseSiteDiagnostic(DiagnosticInfo diagnosticInfo, DiagnosticBag diagnosticBag, Location location)
{
return(Symbol.ReportUseSiteDiagnostic(diagnosticInfo, diagnosticBag, location));
}