private List <SourceLabelSymbol> FindMatchingSwitchCaseLabels(ConstantValue constantValue, SyntaxNodeOrToken labelSyntax = default(SyntaxNodeOrToken))
{
// SwitchLabelsMap: Dictionary for the switch case/default labels.
// Case labels with a non-null constant value are indexed on their ConstantValue.
// Invalid case labels with null constant value are indexed on the labelName.
object key;
if (constantValue != null)
{
key = constantValue;
}
else
{
key = labelSyntax.ToString();
}
return(FindMatchingSwitchLabels(key));
}
/// <summary>
/// Gets a list of all the diagnostics in either the sub tree that has the specified node as its root or
/// associated with the token and its related trivia.
/// </summary>
/// <remarks>
/// This method does not filter diagnostics based on <c>#pragma</c>s and compiler options
/// like /nowarn, /warnaserror etc.
/// </remarks>
public override IEnumerable <Diagnostic> GetDiagnostics(SyntaxNodeOrToken nodeOrToken)
{
return(GetDiagnostics(nodeOrToken.UnderlyingNode, nodeOrToken.Position));
}
internal static void ReportDiagnosticsIfObsolete(
DiagnosticBag diagnostics,
Symbol symbol,
SyntaxNodeOrToken node,
bool hasBaseReceiver,
Symbol containingMember,
NamedTypeSymbol containingType,
BinderFlags location)
{
Debug.Assert((object)symbol != null);
Debug.Assert(symbol.Kind == SymbolKind.NamedType ||
symbol.Kind == SymbolKind.Field ||
symbol.Kind == SymbolKind.Method ||
symbol.Kind == SymbolKind.Event ||
symbol.Kind == SymbolKind.Property);
// Dev11 also reports on the unconstructed method. It would be nice to report on
// the constructed method, but then we wouldn't be able to walk the override chain.
if (symbol.Kind == SymbolKind.Method)
{
symbol = ((MethodSymbol)symbol).ConstructedFrom;
}
// There are two reasons to walk up to the least-overridden member:
// 1) That's the method to which we will actually emit a call.
// 2) We don't know what virtual dispatch will do at runtime so an
// overriding member is basically a shot in the dark. Better to
// just be consistent and always use the least-overridden member.
Symbol leastOverriddenSymbol = symbol.GetLeastOverriddenMember(containingType);
bool checkOverridingSymbol = hasBaseReceiver && !ReferenceEquals(symbol, leastOverriddenSymbol);
if (checkOverridingSymbol)
{
// If we have a base receiver, we must be done with declaration binding, so it should
// be safe to decode diagnostics. We want to do this since reporting for the overriding
// member is conditional on reporting for the overridden member (i.e. we need a definite
// answer so we don't double-report). You might think that double reporting just results
// in cascading diagnostics, but it's possible that the second diagnostic is an error
// while the first is merely a warning.
leastOverriddenSymbol.GetAttributes();
}
ThreeState reportedOnOverridden = ReportDiagnosticsIfObsoleteInternal(diagnostics, leastOverriddenSymbol, node, containingMember, location);
// CONSIDER: In place of hasBaseReceiver, dev11 also accepts cases where symbol.ContainingType is a "simple type" (e.g. int)
// or a special by-ref type (e.g. ArgumentHandle). These cases are probably more important for other checks performed by
// ExpressionBinder::PostBindMethod, but they do appear to ObsoleteAttribute as well. We're skipping them because they
// don't make much sense for ObsoleteAttribute (e.g. this would seem to address the case where int.ToString has been made
// obsolete but object.ToString has not).
// If the overridden member was not definitely obsolete and this is a (non-virtual) base member
// access, then check the overriding symbol as well.
if (reportedOnOverridden != ThreeState.True && checkOverridingSymbol)
{
Debug.Assert(reportedOnOverridden != ThreeState.Unknown, "We forced attribute binding above.");
ReportDiagnosticsIfObsoleteInternal(diagnostics, symbol, node, containingMember, location);
}
}
/// <returns>
/// True if the symbol is definitely obsolete.
/// False if the symbol is definitely not obsolete.
/// Unknown if the symbol may be obsolete.
///
/// NOTE: The return value reflects obsolete-ness, not whether or not the diagnostic was reported.
/// </returns>
private static ThreeState ReportDiagnosticsIfObsoleteInternal(DiagnosticBag diagnostics, Symbol symbol, SyntaxNodeOrToken node, Symbol containingMember, BinderFlags location)
{
Debug.Assert(diagnostics != null);
if (symbol.ObsoleteState == ThreeState.False)
{
return(ThreeState.False);
}
var data = symbol.ObsoleteAttributeData;
if (data == null)
{
// Obsolete attribute has errors.
return(ThreeState.False);
}
// If we haven't cracked attributes on the symbol at all or we haven't
// cracked attribute arguments enough to be able to report diagnostics for
// ObsoleteAttribute, store the symbol so that we can report diagnostics at a
// later stage.
if (symbol.ObsoleteState == ThreeState.Unknown)
{
diagnostics.Add(new LazyObsoleteDiagnosticInfo(symbol, containingMember, location), node.GetLocation());
return(ThreeState.Unknown);
}
// After this point, always return True.
var inObsoleteContext = ObsoleteAttributeHelpers.GetObsoleteContextState(containingMember);
// If we are in a context that is already obsolete, there is no point reporting
// more obsolete diagnostics.
if (inObsoleteContext == ThreeState.True)
{
return(ThreeState.True);
}
// If the context is unknown, then store the symbol so that we can do this check at a
// later stage
else if (inObsoleteContext == ThreeState.Unknown)
{
diagnostics.Add(new LazyObsoleteDiagnosticInfo(symbol, containingMember, location), node.GetLocation());
return(ThreeState.True);
}
// We have all the information we need to report diagnostics right now. So do it.
var diagInfo = ObsoleteAttributeHelpers.CreateObsoleteDiagnostic(symbol, location);
if (diagInfo != null)
{
diagnostics.Add(diagInfo, node.GetLocation());
return(ThreeState.True);
}
return(ThreeState.True);
}
/// <summary>
/// Issue an error or warning for a symbol if it is Obsolete. If there is not enough
/// information to report diagnostics, then store the symbols so that diagnostics
/// can be reported at a later stage.
/// </summary>
internal void ReportDiagnosticsIfObsolete(DiagnosticBag diagnostics, Symbol symbol, SyntaxNodeOrToken node, bool hasBaseReceiver)
{
switch (symbol.Kind)
{
case SymbolKind.NamedType:
case SymbolKind.Field:
case SymbolKind.Method:
case SymbolKind.Event:
case SymbolKind.Property:
ReportDiagnosticsIfObsolete(diagnostics, symbol, node, hasBaseReceiver, this.ContainingMemberOrLambda, this.ContainingType, this.Flags);
break;
}
}
internal void ReportDiagnosticsIfObsolete(DiagnosticBag diagnostics, Conversion conversion, SyntaxNodeOrToken node, bool hasBaseReceiver)
{
if (conversion.IsValid && (object)conversion.Method != null)
{
ReportDiagnosticsIfObsolete(diagnostics, conversion.Method, node, hasBaseReceiver);
}
}
internal static void Error(DiagnosticBag diagnostics, ErrorCode code, SyntaxNodeOrToken syntax, params object[] args)
{
Error(diagnostics, code, syntax.GetLocation(), args);
}
internal static void Error(DiagnosticBag diagnostics, ErrorCode code, SyntaxNodeOrToken syntax)
{
Error(diagnostics, code, syntax.GetLocation());
}
private static TextSpan CreateSpan(SyntaxTokenList startOpt, SyntaxNodeOrToken startFallbackOpt, SyntaxNodeOrToken endOpt)
{
Debug.Assert(startFallbackOpt != default(SyntaxNodeOrToken) || endOpt != default(SyntaxNodeOrToken));
int startPos;
if (startOpt.Count > 0)
{
startPos = startOpt.First().SpanStart;
}
else if (startFallbackOpt != default(SyntaxNodeOrToken))
{
startPos = startFallbackOpt.SpanStart;
}
else
{
startPos = endOpt.SpanStart;
}
int endPos;
if (endOpt != default(SyntaxNodeOrToken))
{
endPos = GetEndPosition(endOpt);
}
else
{
endPos = GetEndPosition(startFallbackOpt);
}
return(TextSpan.FromBounds(startPos, endPos));
}
internal static ObsoleteDiagnosticKind ReportDiagnosticsIfObsoleteInternal(DiagnosticBag diagnostics, Symbol symbol, SyntaxNodeOrToken node, Symbol containingMember, BinderFlags location)
{
Debug.Assert(diagnostics != null);
var kind = ObsoleteAttributeHelpers.GetObsoleteDiagnosticKind(symbol, containingMember);
DiagnosticInfo info = null;
switch (kind)
{
case ObsoleteDiagnosticKind.Diagnostic:
info = ObsoleteAttributeHelpers.CreateObsoleteDiagnostic(symbol, location);
break;
case ObsoleteDiagnosticKind.Lazy:
case ObsoleteDiagnosticKind.LazyPotentiallySuppressed:
info = new LazyObsoleteDiagnosticInfo(symbol, containingMember, location);
break;
}
if (info != null)
{
diagnostics.Add(info, node.GetLocation());
}
return(kind);
}
public void TestAddInsertRemove()
{
var list = SyntaxFactory.NodeOrTokenList(SyntaxFactory.ParseToken("A "), SyntaxFactory.ParseToken("B "), SyntaxFactory.ParseToken("C "));
Assert.Equal(3, list.Count);
Assert.Equal("A", list[0].ToString());
Assert.Equal("B", list[1].ToString());
Assert.Equal("C", list[2].ToString());
Assert.Equal("A B C ", list.ToFullString());
var elementA = list[0];
var elementB = list[1];
var elementC = list[2];
Assert.Equal(0, list.IndexOf(elementA));
Assert.Equal(1, list.IndexOf(elementB));
Assert.Equal(2, list.IndexOf(elementC));
SyntaxNodeOrToken tokenD = SyntaxFactory.ParseToken("D ");
SyntaxNodeOrToken nameE = SyntaxFactory.ParseExpression("E ");
var newList = list.Add(tokenD);
Assert.Equal(4, newList.Count);
Assert.Equal("A B C D ", newList.ToFullString());
newList = list.AddRange(new[] { tokenD, nameE });
Assert.Equal(5, newList.Count);
Assert.Equal("A B C D E ", newList.ToFullString());
newList = list.Insert(0, tokenD);
Assert.Equal(4, newList.Count);
Assert.Equal("D A B C ", newList.ToFullString());
newList = list.Insert(1, tokenD);
Assert.Equal(4, newList.Count);
Assert.Equal("A D B C ", newList.ToFullString());
newList = list.Insert(2, tokenD);
Assert.Equal(4, newList.Count);
Assert.Equal("A B D C ", newList.ToFullString());
newList = list.Insert(3, tokenD);
Assert.Equal(4, newList.Count);
Assert.Equal("A B C D ", newList.ToFullString());
newList = list.InsertRange(0, new[] { tokenD, nameE });
Assert.Equal(5, newList.Count);
Assert.Equal("D E A B C ", newList.ToFullString());
newList = list.InsertRange(1, new[] { tokenD, nameE });
Assert.Equal(5, newList.Count);
Assert.Equal("A D E B C ", newList.ToFullString());
newList = list.InsertRange(2, new[] { tokenD, nameE });
Assert.Equal(5, newList.Count);
Assert.Equal("A B D E C ", newList.ToFullString());
newList = list.InsertRange(3, new[] { tokenD, nameE });
Assert.Equal(5, newList.Count);
Assert.Equal("A B C D E ", newList.ToFullString());
newList = list.RemoveAt(0);
Assert.Equal(2, newList.Count);
Assert.Equal("B C ", newList.ToFullString());
newList = list.RemoveAt(list.Count - 1);
Assert.Equal(2, newList.Count);
Assert.Equal("A B ", newList.ToFullString());
newList = list.Remove(elementA);
Assert.Equal(2, newList.Count);
Assert.Equal("B C ", newList.ToFullString());
newList = list.Remove(elementB);
Assert.Equal(2, newList.Count);
Assert.Equal("A C ", newList.ToFullString());
newList = list.Remove(elementC);
Assert.Equal(2, newList.Count);
Assert.Equal("A B ", newList.ToFullString());
newList = list.Replace(elementA, tokenD);
Assert.Equal(3, newList.Count);
Assert.Equal("D B C ", newList.ToFullString());
newList = list.Replace(elementB, tokenD);
Assert.Equal(3, newList.Count);
Assert.Equal("A D C ", newList.ToFullString());
newList = list.Replace(elementC, tokenD);
Assert.Equal(3, newList.Count);
Assert.Equal("A B D ", newList.ToFullString());
newList = list.ReplaceRange(elementA, new[] { tokenD, nameE });
Assert.Equal(4, newList.Count);
Assert.Equal("D E B C ", newList.ToFullString());
newList = list.ReplaceRange(elementB, new[] { tokenD, nameE });
Assert.Equal(4, newList.Count);
Assert.Equal("A D E C ", newList.ToFullString());
newList = list.ReplaceRange(elementC, new[] { tokenD, nameE });
Assert.Equal(4, newList.Count);
Assert.Equal("A B D E ", newList.ToFullString());
newList = list.ReplaceRange(elementA, new SyntaxNodeOrToken[] { });
Assert.Equal(2, newList.Count);
Assert.Equal("B C ", newList.ToFullString());
newList = list.ReplaceRange(elementB, new SyntaxNodeOrToken[] { });
Assert.Equal(2, newList.Count);
Assert.Equal("A C ", newList.ToFullString());
newList = list.ReplaceRange(elementC, new SyntaxNodeOrToken[] { });
Assert.Equal(2, newList.Count);
Assert.Equal("A B ", newList.ToFullString());
Assert.Equal(-1, list.IndexOf(tokenD));
Assert.Throws <ArgumentOutOfRangeException>(() => list.Insert(-1, tokenD));
Assert.Throws <ArgumentOutOfRangeException>(() => list.Insert(list.Count + 1, tokenD));
Assert.Throws <ArgumentOutOfRangeException>(() => list.InsertRange(-1, new[] { tokenD }));
Assert.Throws <ArgumentOutOfRangeException>(() => list.InsertRange(list.Count + 1, new[] { tokenD }));
Assert.Throws <ArgumentOutOfRangeException>(() => list.RemoveAt(-1));
Assert.Throws <ArgumentOutOfRangeException>(() => list.RemoveAt(list.Count));
Assert.Throws <ArgumentException>(() => list.Replace(tokenD, nameE));
Assert.Throws <ArgumentException>(() => list.ReplaceRange(tokenD, new[] { nameE }));
Assert.Throws <ArgumentException>(() => list.Add(default(SyntaxNodeOrToken)));
Assert.Throws <ArgumentException>(() => list.Insert(0, default(SyntaxNodeOrToken)));
Assert.Throws <ArgumentNullException>(() => list.AddRange((IEnumerable <SyntaxNodeOrToken>)null));
Assert.Throws <ArgumentNullException>(() => list.InsertRange(0, (IEnumerable <SyntaxNodeOrToken>)null));
Assert.Throws <ArgumentNullException>(() => list.ReplaceRange(elementA, (IEnumerable <SyntaxNodeOrToken>)null));
}