268 references to NullableFlowState
Microsoft.CodeAnalysis.CSharp (268)
Binder\Semantics\BestTypeInferrer.cs (3)
36
public static
NullableFlowState
GetNullableState(ArrayBuilder<TypeWithState> types)
38
NullableFlowState
result =
NullableFlowState
.NotNull;
FlowAnalysis\NullableWalker.cs (193)
126
public VisitResult(TypeSymbol? type, NullableAnnotation annotation,
NullableFlowState
state)
216
private static readonly TypeWithState _invalidType = TypeWithState.Create(new UnsupportedMetadataTypeSymbol(),
NullableFlowState
.NotNull);
796
var
memberState = GetState(ref state, slot);
797
var
badState = symbolType.Type.IsPossiblyNullableReferenceTypeTypeParameter() && (annotations & FlowAnalysisAnnotations.NotNull) == 0
798
?
NullableFlowState
.MaybeDefault
799
:
NullableFlowState
.MaybeNull;
855
SetState(ref this.State, memberSlot, type.Type.IsPossiblyNullableReferenceTypeTypeParameter() ?
NullableFlowState
.MaybeDefault :
NullableFlowState
.MaybeNull);
1150
var
parameterState = GetState(ref state, memberSlot);
1182
SetState(ref this.State, memberSlot,
NullableFlowState
.MaybeNull);
1295
var
parameterState = GetState(ref state, slot);
1351
var
parameterState = GetState(ref stateWhen, slot);
1378
private void EnforceNotNullIfNotNull(SyntaxNode? syntaxOpt, LocalState state, ImmutableArray<ParameterSymbol> parameters, ImmutableHashSet<string> inputParamNames,
NullableFlowState
outputState, ParameterSymbol? outputParam)
1965
private
NullableFlowState
GetState(ref LocalState state, int slot)
1968
return
NullableFlowState
.NotNull;
1974
private void SetState(ref LocalState state, int slot,
NullableFlowState
value, bool useNotNullsAsDefault = false)
1996
private
NullableFlowState
GetDefaultState(ref LocalState state, int slot)
2001
return
NullableFlowState
.NotNull;
2031
return
NullableFlowState
.NotNull;
2360
private static bool ShouldReportNullableAssignment(TypeWithAnnotations type,
NullableFlowState
state)
2377
case
NullableFlowState
.NotNull:
2379
case
NullableFlowState
.MaybeNull:
2455
valueType.State ==
NullableFlowState
.MaybeDefault;
2637
var
newState = valueType.State;
2740
NullableFlowState
value = isDefaultValue ?
NullableFlowState
.MaybeNull : fieldOrPropertyType.ToTypeWithState().State;
2752
NullableFlowState
.NotNull;
2800
/// and the new state is not <see cref="
NullableFlowState
.NotNull"/>, this method should be called to perform the
2804
private void SetStateAndTrackForFinally(ref LocalState state, int slot,
NullableFlowState
newState)
2808
if (newState !=
NullableFlowState
.NotNull && NonMonotonicState.HasValue)
2893
private
NullableFlowState
GetDefaultState(Symbol symbol)
2986
var
state = GetParameterState(parameterType, parameter.FlowAnalysisAnnotations).State;
3024
return TypeWithState.Create(parameterType.Type,
NullableFlowState
.MaybeDefault);
3029
return TypeWithState.Create(parameterType.Type,
NullableFlowState
.NotNull);
3333
SetState(ref state, slot,
NullableFlowState
.NotNull);
3832
SetResultType(node, TypeWithState.Create(null,
NullableFlowState
.NotNull));
3840
SetResultType(node, TypeWithState.Create(null,
NullableFlowState
.NotNull));
3994
NullableFlowState
resultState = getResultState(node, collectionKind);
4000
static
NullableFlowState
getResultState(BoundCollectionExpression node, CollectionExpressionTypeKind collectionKind)
4012
return
NullableFlowState
.NotNull;
4081
(int slot,
NullableFlowState
resultState, Func<TypeSymbol, MethodSymbol?, int>? initialStateInferenceCompletion) =
4101
NullableFlowState
resultState,
4130
NullableFlowState
resultState)
4132
Debug.Assert(resultState ==
NullableFlowState
.NotNull);
4164
(int slot,
NullableFlowState
resultState, Func<TypeSymbol, MethodSymbol?, int>? completion) inferInitialObjectState(
4172
return (-1,
NullableFlowState
.NotNull, inferInitialObjectStateAsContinuation(node, arguments, argumentResults, hasObjectInitializer));
4178
var
resultState =
NullableFlowState
.NotNull;
4210
resultState =
NullableFlowState
.MaybeNull;
4245
Debug.Assert(resultState ==
NullableFlowState
.NotNull);
4379
var result = new VisitResult(objectInitializer.Type, NullableAnnotation.NotAnnotated,
NullableFlowState
.NotNull);
4568
SetAnalyzedNullability(node.ImplicitReceiverOpt, new VisitResult(node.ImplicitReceiverOpt.Type, NullableAnnotation.NotAnnotated,
NullableFlowState
.NotNull));
4626
SetResultType(node, TypeWithState.Create(node.Type,
NullableFlowState
.NotNull));
4631
var resultType = TypeWithState.Create(node.Type,
NullableFlowState
.NotNull);
4739
SetResultType(node, TypeWithState.Create(anonymousType,
NullableFlowState
.NotNull));
4771
SetResultType(node, TypeWithState.Create(node.Type,
NullableFlowState
.NotNull));
4776
SetResultType(node, TypeWithState.Create(arrayType,
NullableFlowState
.NotNull));
4852
var
elementState = BestTypeInferrer.GetNullableState(expressionTypes);
5054
NullableFlowState
resultState =
NullableFlowState
.NotNull;
5082
resultState =
NullableFlowState
.MaybeNull; // Delegate removal can produce null.
5085
resultState =
NullableFlowState
.NotNull;
5674
SetState(ref stateToUpdate, slot,
NullableFlowState
.NotNull);
5703
SetState(ref state, slot,
NullableFlowState
.NotNull);
5728
if (GetState(ref state, slot) ==
NullableFlowState
.NotNull)
5731
SetState(ref state, slot,
NullableFlowState
.MaybeNull);
5760
SetState(ref state, childSlot,
NullableFlowState
.NotNull);
5839
SetState(ref this.State, leftSlot,
NullableFlowState
.NotNull);
5894
BoundNullCoalescingOperatorResultKind.NoCommonType => (node.Type,
NullableFlowState
.NotNull),
5899
BoundNullCoalescingOperatorResultKind.RightDynamicType => (rightResultType!,
NullableFlowState
.NotNull),
5906
(TypeSymbol ResultType,
NullableFlowState
LeftState) getLeftResultType(TypeSymbol leftType, TypeSymbol rightType)
5916
return (rightType,
NullableFlowState
.NotNull);
5921
return (leftType,
NullableFlowState
.NotNull);
5924
(TypeSymbol ResultType,
NullableFlowState
LeftState) getResultStateWithRightType(TypeSymbol leftType, TypeSymbol rightType)
5936
TypeWithState.Create(leftType,
NullableFlowState
.NotNull),
5947
return (rightType,
NullableFlowState
.NotNull);
6120
SetResultType(node, TypeWithState.Create(resultType,
NullableFlowState
.MaybeDefault));
6175
var
rValueState = consequenceRValue.State.Join(alternativeRValue.State);
6283
NullableFlowState
resultState;
6443
SetResultType(node, TypeWithState.Create(rvalueType,
NullableFlowState
.NotNull));
6912
private
NullableFlowState
LearnFromCompareExchangeMethod(in CompareExchangeInfo compareExchangeInfo)
6932
return
NullableFlowState
.NotNull;
6942
var
valueFlowState = compareExchangeInfo.Results[valueIndex].RValueType.State;
6949
var
locationFlowState = compareExchangeInfo.Results[locationIndex].RValueType.State;
7066
return TypeWithState.Create(typeWithState.Type,
NullableFlowState
.NotNull);
7071
return TypeWithState.Create(typeWithState.Type,
NullableFlowState
.MaybeDefault);
7661
SetState(ref state, memberSlot,
NullableFlowState
.NotNull);
7966
var
adjustedState = LearnFromCompareExchangeMethod(in compareExchangeInfoOpt);
8090
return TypeWithState.Create(typeWithState.Type,
NullableFlowState
.MaybeDefault);
8096
return TypeWithState.Create(typeWithState.Type,
NullableFlowState
.NotNull);
8111
return TypeWithState.Create(typeWithState.Type,
NullableFlowState
.MaybeDefault);
8115
return TypeWithState.Create(typeWithState.Type,
NullableFlowState
.NotNull);
8130
return TypeWithState.Create(typeWithState.Type,
NullableFlowState
.MaybeDefault);
8134
return TypeWithState.Create(typeWithState.Type,
NullableFlowState
.NotNull);
8646
NullableFlowState
state = GetState(ref this.State, slot);
8920
SetResultType(node, TypeWithState.Create(null,
NullableFlowState
.NotNull));
8927
SetState(ref this.State, slot,
NullableFlowState
.NotNull);
8945
SetResultType(node, TypeWithState.Create(tupleOpt,
NullableFlowState
.NotNull));
9067
SetState(ref this.State, targetFieldSlot,
NullableFlowState
.NotNull);
9084
SetState(ref this.State, targetFieldSlot,
NullableFlowState
.NotNull);
9320
NullableFlowState
resultState =
NullableFlowState
.NotNull;
9352
resultState =
NullableFlowState
.NotNull;
9376
return TypeWithState.Create(targetType,
NullableFlowState
.NotNull);
9382
resultState =
NullableFlowState
.NotNull;
9386
resultState =
NullableFlowState
.NotNull;
9391
resultState =
NullableFlowState
.NotNull;
9431
resultState =
NullableFlowState
.NotNull;
9555
resultState =
NullableFlowState
.NotNull;
9625
static TypeWithState calculateResultType(TypeWithAnnotations targetTypeWithNullability, bool fromExplicitCast,
NullableFlowState
resultState, bool isSuppressed, TypeSymbol targetType)
9629
resultState =
NullableFlowState
.NotNull;
9634
resultState = targetType?.IsTypeParameterDisallowingAnnotationInCSharp8() == true ?
NullableFlowState
.MaybeDefault :
NullableFlowState
.MaybeNull;
9641
static
NullableFlowState
getReferenceConversionResultState(TypeWithAnnotations targetType, TypeWithState operandType)
9643
var
state = operandType.State;
9646
case
NullableFlowState
.MaybeNull:
9652
return
NullableFlowState
.MaybeDefault;
9658
return (annotation == NullableAnnotation.Annotated) ?
NullableFlowState
.MaybeDefault :
NullableFlowState
.MaybeNull;
9662
case
NullableFlowState
.MaybeDefault:
9665
return
NullableFlowState
.MaybeNull;
9675
static
NullableFlowState
getBoxingConversionResultState(TypeWithAnnotations targetType, TypeWithState operandType)
9677
var
state = operandType.State;
9678
if (state ==
NullableFlowState
.MaybeNull)
9683
return
NullableFlowState
.MaybeDefault;
9693
return (annotation == NullableAnnotation.Annotated) ?
NullableFlowState
.MaybeDefault :
NullableFlowState
.MaybeNull;
9703
static
NullableFlowState
getUnboxingConversionResultState(TypeWithState operandType)
9705
var
state = operandType.State;
9706
if (state ==
NullableFlowState
.MaybeNull)
9708
return
NullableFlowState
.MaybeDefault;
9713
static
NullableFlowState
getConversionResultState(TypeWithState operandType)
9715
var
state = operandType.State;
9716
if (state ==
NullableFlowState
.MaybeNull)
9718
return
NullableFlowState
.MaybeDefault;
9846
var resultType = TypeWithState.Create(targetType,
NullableFlowState
.NotNull);
9889
NullableFlowState
operandState = operandType.State;
10009
private TypeWithState GetLiftedReturnType(TypeWithAnnotations returnType,
NullableFlowState
operandState)
10013
NullableFlowState
state = returnType.ToTypeWithState().State.Join(operandState);
10030
private TypeWithState GetLiftedReturnTypeIfNecessary(bool isLifted, TypeWithAnnotations returnType,
NullableFlowState
operandState)
10126
var result = TypeWithState.Create(delegateType,
NullableFlowState
.NotNull);
10423
var rvalueResult = TypeWithState.Create(node.Type,
NullableFlowState
.NotNull);
10843
var valueBeforeNullableWrapping = TypeWithState.Create(underlyingType.Type,
NullableFlowState
.NotNull);
10973
SetResultType(node, TypeWithState.Create(receiverType.Type,
NullableFlowState
.NotNull));
10997
SetResultType(node, TypeWithState.Create(opType.Type,
NullableFlowState
.NotNull));
11151
SetResultType(node, TypeWithState.Create(receiverType.Type,
NullableFlowState
.NotNull));
11179
SetResultType(node, TypeWithState.Create(opType.Type,
NullableFlowState
.NotNull));
11475
var
state = GetState(ref this.State, slot);
11487
SetState(ref this.StateWhenTrue, containingSlot,
NullableFlowState
.NotNull);
11705
if (enumeratorReturnType.State !=
NullableFlowState
.NotNull)
11786
var
state =
NullableFlowState
.NotNull;
11983
TypeWithState.Create(node.Type, node.OperatorKind.IsLifted() ? argumentResult.State :
NullableFlowState
.NotNull);
12251
SetResultType(node, TypeWithState.Create(node.Type,
NullableFlowState
.NotNull));
12273
SetResultType(node, TypeWithState.Create(node.Type,
NullableFlowState
.MaybeDefault));
12288
SetState(ref this.State, slot,
NullableFlowState
.NotNull);
12334
NullableFlowState
resultState =
NullableFlowState
.NotNull;
12349
resultState =
NullableFlowState
.MaybeDefault;
12387
SetResultType(node, TypeWithState.Create(node.Type, node.Type?.CanContainNull() != false && node.ConstantValueOpt?.IsNull == true ?
NullableFlowState
.MaybeDefault :
NullableFlowState
.NotNull));
12495
node.IsAddition ? GetState(ref this.State, memberSlot).Meet(ResultType.State) :
NullableFlowState
.MaybeNull);
12612
private bool ReportPossibleNullReceiverIfNeeded(TypeSymbol type,
NullableFlowState
state, bool checkNullableValueType, SyntaxNode syntax, out bool reportedDiagnostic)
12671
SetResultType(node, TypeWithState.Create(node.Type,
NullableFlowState
.NotNull));
12686
SetResultType(node, TypeWithState.Create(node.Type,
NullableFlowState
.NotNull));
12735
SetResultType(node, TypeWithState.Create(node.Type,
NullableFlowState
.NotNull));
12741
SetResultType(node, TypeWithState.Create(type,
NullableFlowState
.NotNull));
12809
SetState(ref this.State, slot,
NullableFlowState
.NotNull);
12898
Debug.Assert(ResultType is TypeWithState { Type: FunctionPointerTypeSymbol { }, State:
NullableFlowState
.NotNull });
13203
SetValue(Id, index, useNotNullsAsDefault ?
NullableFlowState
.NotNull : walker.GetDefaultState(ref this, slot));
13207
public
NullableFlowState
this[int slot]
13221
private
NullableFlowState
GetValue(int id, int index)
13231
private
NullableFlowState
GetValue(int index)
13235
return
NullableFlowState
.NotNull;
13242
var
result = (_state[index], _state[index + 1]) switch
13244
(false, false) =>
NullableFlowState
.NotNull, // Should not be reachable
13245
(true, false) =>
NullableFlowState
.MaybeNull,
13246
(false, true) =>
NullableFlowState
.MaybeDefault,
13247
(true, true) =>
NullableFlowState
.NotNull
13253
private void SetValue(int id, int index,
NullableFlowState
value)
13266
private void SetValue(int index,
NullableFlowState
value)
13274
NullableFlowState
.MaybeNull => (true, false),
13275
NullableFlowState
.MaybeDefault => (false, true),
13276
NullableFlowState
.NotNull => (true, true),
13330
var
oldValue = oldReachable ? GetValue(i) :
NullableFlowState
.NotNull;
13331
var
newValue = oldValue.Join(other.GetValue(i));
13356
var
oldValue = GetValue(i);
13357
var
newValue = oldValue.Meet(other.GetValue(i));
13373
var mayBeNull = GetValue(i) is
NullableFlowState
.MaybeNull or
NullableFlowState
.MaybeDefault;
13404
NullableFlowState
.MaybeNull => "?",
13405
NullableFlowState
.MaybeDefault => "??",
FlowAnalysis\NullableWalker_Patterns.cs (5)
481
SetState(ref State, outputSlot,
NullableFlowState
.NotNull);
577
SetState(ref this.State, outputSlot,
NullableFlowState
.NotNull); // Slice value is assumed to be never null
680
var
tempState = GetState(ref this.State, tempSlot);
956
NullableFlowState
inferredState;
1006
NullableFlowState
inferredState = BestTypeInferrer.GetNullableState(resultTypes);
Symbols\ConstraintsHelper.cs (14)
1228
static
NullableFlowState
getTypeArgumentState(in TypeWithAnnotations typeWithAnnotations)
1233
return
NullableFlowState
.NotNull;
1237
return type.IsNullableTypeOrTypeParameter() ?
NullableFlowState
.MaybeNull :
NullableFlowState
.NotNull;
1242
return type.IsTypeParameterDisallowingAnnotationInCSharp8() ?
NullableFlowState
.MaybeDefault :
NullableFlowState
.MaybeNull;
1244
return
NullableFlowState
.NotNull;
1249
return
NullableFlowState
.NotNull;
1251
NullableFlowState
? result = null;
1254
var
constraintState = getTypeArgumentState(constraintType);
1264
return result ??
NullableFlowState
.MaybeNull;
1267
static bool constraintTypeAllows(in TypeWithAnnotations typeWithAnnotations,
NullableFlowState
state)
1269
if (state ==
NullableFlowState
.NotNull)
1296
return state ==
NullableFlowState
.MaybeNull;
Symbols\NullableAnnotationExtensions.cs (1)
104
var
flowState = TypeWithAnnotations.Create(type, annotation).ToTypeWithState().State;
Symbols\NullableFlowState.cs (1)
11
/// When in doubt we conservatively use <see cref="
NullableFlowState
.NotNull"/>
Symbols\NullableFlowStateExtensions.cs (20)
13
public static bool MayBeNull(this
NullableFlowState
state) => state !=
NullableFlowState
.NotNull;
15
public static bool IsNotNull(this
NullableFlowState
state) => state ==
NullableFlowState
.NotNull;
19
/// The result is <see cref="
NullableFlowState
.MaybeNull"/> if either operand is that.
21
public static
NullableFlowState
Join(this
NullableFlowState
a,
NullableFlowState
b) => (a > b) ? a : b;
25
/// The result is <see cref="
NullableFlowState
.NotNull"/> if either operand is that.
27
public static
NullableFlowState
Meet(this
NullableFlowState
a,
NullableFlowState
b) => (a < b) ? a : b;
29
internal static CodeAnalysis.NullableFlowState ToPublicFlowState(this CSharp.
NullableFlowState
nullableFlowState) =>
32
CSharp.
NullableFlowState
.NotNull => CodeAnalysis.NullableFlowState.NotNull,
33
CSharp.
NullableFlowState
.MaybeNull => CodeAnalysis.NullableFlowState.MaybeNull,
34
CSharp.
NullableFlowState
.MaybeDefault => CodeAnalysis.NullableFlowState.MaybeNull,
39
public static CSharp.
NullableFlowState
ToInternalFlowState(this CodeAnalysis.NullableFlowState flowState) =>
42
CodeAnalysis.NullableFlowState.None => CSharp.
NullableFlowState
.NotNull,
43
CodeAnalysis.NullableFlowState.NotNull => CSharp.
NullableFlowState
.NotNull,
44
CodeAnalysis.NullableFlowState.MaybeNull => CSharp.
NullableFlowState
.MaybeNull,
Symbols\TypeWithAnnotations.cs (11)
813
static
NullableFlowState
getFlowState(TypeSymbol type, NullableAnnotation annotation)
817
return annotation.IsAnnotated() ?
NullableFlowState
.MaybeDefault :
NullableFlowState
.NotNull;
821
return annotation switch { NullableAnnotation.Annotated =>
NullableFlowState
.MaybeDefault, NullableAnnotation.NotAnnotated =>
NullableFlowState
.MaybeNull, _ =>
NullableFlowState
.NotNull };
825
return annotation switch { NullableAnnotation.Annotated =>
NullableFlowState
.MaybeDefault, _ =>
NullableFlowState
.NotNull };
829
return
NullableFlowState
.MaybeNull;
831
return annotation switch { NullableAnnotation.Annotated =>
NullableFlowState
.MaybeNull, _ =>
NullableFlowState
.NotNull };
Symbols\TypeWithState.cs (20)
17
public readonly
NullableFlowState
State;
20
public bool MayBeNull => State ==
NullableFlowState
.MaybeNull;
21
public bool IsNotNull => State ==
NullableFlowState
.NotNull;
25
return Create(type,
NullableFlowState
.MaybeDefault);
28
public static TypeWithState Create(TypeSymbol? type,
NullableFlowState
defaultState)
30
if (defaultState ==
NullableFlowState
.MaybeDefault &&
36
var
state = defaultState !=
NullableFlowState
.NotNull && type?.CanContainNull() != false ?
NullableFlowState
.MaybeNull :
NullableFlowState
.NotNull;
45
NullableFlowState
state;
50
state =
NullableFlowState
.MaybeDefault;
54
state =
NullableFlowState
.NotNull;
63
state =
NullableFlowState
.NotNull;
69
private TypeWithState(TypeSymbol? type,
NullableFlowState
state)
71
Debug.Assert(state ==
NullableFlowState
.NotNull || type?.CanContainNull() != false);
72
Debug.Assert(state !=
NullableFlowState
.MaybeDefault || type is null || type.IsTypeParameterDisallowingAnnotationInCSharp8());
81
public TypeWithState WithNotNullState() => new TypeWithState(Type,
NullableFlowState
.NotNull);
83
public TypeWithState WithSuppression(bool suppress) => suppress ? new TypeWithState(Type,
NullableFlowState
.NotNull) : this;
90
return (State ==
NullableFlowState
.MaybeDefault || asAnnotatedType) ? type.SetIsAnnotated(compilation) : type;