private SourcePropertyAccessorSymbol(
NamedTypeSymbol containingType,
string name,
SourcePropertySymbol property,
DeclarationModifiers propertyModifiers,
ImmutableArray <MethodSymbol> explicitInterfaceImplementations,
Location location,
ArrowExpressionClauseSyntax syntax,
bool isExplicitInterfaceImplementation,
DiagnosticBag diagnostics) :
base(containingType, syntax.GetReference(), location)
{
_property = property;
_explicitInterfaceImplementations = explicitInterfaceImplementations;
_name = name;
_isAutoPropertyAccessor = false;
_isExpressionBodied = true;
// The modifiers for the accessor are the same as the modifiers for the property,
// minus the indexer and readonly bit
var declarationModifiers = GetAccessorModifiers(propertyModifiers);
// ReturnsVoid property is overridden in this class so
// returnsVoid argument to MakeFlags is ignored.
this.MakeFlags(MethodKind.PropertyGet, declarationModifiers, returnsVoid: false, isExtensionMethod: false,
isMetadataVirtualIgnoringModifiers: explicitInterfaceImplementations.Any());
CheckFeatureAvailabilityAndRuntimeSupport(syntax, location, hasBody: true, diagnostics: diagnostics);
CheckModifiersForBody(syntax, location, diagnostics);
var info = ModifierUtils.CheckAccessibility(this.DeclarationModifiers, this, isExplicitInterfaceImplementation);
if (info != null)
{
diagnostics.Add(info, location);
}
this.CheckModifiers(location, hasBody: true, isAutoPropertyOrExpressionBodied: true, diagnostics: diagnostics);
if (this.IsOverride)
{
MethodSymbol overriddenMethod = this.OverriddenMethod;
if ((object)overriddenMethod != null)
{
// If this accessor is overriding a method from metadata, it is possible that
// the name of the overridden method doesn't follow the C# get_X/set_X pattern.
// We should copy the name so that the runtime will recognize this as an override.
_name = overriddenMethod.Name;
}
}
}
private SourceConstructorSymbol(
SourceMemberContainerTypeSymbol containingType,
Location location,
ConstructorDeclarationSyntax syntax,
MethodKind methodKind,
DiagnosticBag diagnostics) :
base(containingType, syntax.GetReference(), syntax.Body?.GetReference() ?? syntax.ExpressionBody?.GetReference(), ImmutableArray.Create(location))
{
bool modifierErrors;
var declarationModifiers = this.MakeModifiers(syntax.Modifiers, methodKind, location, diagnostics, out modifierErrors);
this.MakeFlags(methodKind, declarationModifiers, returnsVoid: true, isExtensionMethod: false);
if (syntax.Identifier.ValueText != containingType.Name)
{
// This is probably a method declaration with the type missing.
diagnostics.Add(ErrorCode.ERR_MemberNeedsType, location);
}
bool hasBlockBody = syntax.Body != null;
_isExpressionBodied = !hasBlockBody && syntax.ExpressionBody != null;
if (IsExtern)
{
if (methodKind == MethodKind.Constructor && syntax.Initializer != null)
{
diagnostics.Add(ErrorCode.ERR_ExternHasConstructorInitializer, location, this);
}
if (hasBlockBody || _isExpressionBodied)
{
diagnostics.Add(ErrorCode.ERR_ExternHasBody, location, this);
}
}
var info = ModifierUtils.CheckAccessibility(this.DeclarationModifiers);
if (info != null)
{
diagnostics.Add(info, location);
}
if (!modifierErrors)
{
this.CheckModifiers(methodKind, location, diagnostics);
}
CheckForBlockAndExpressionBody(
syntax.Body, syntax.ExpressionBody, syntax, diagnostics);
}
protected SourceOrdinaryMethodSymbolBase(
NamedTypeSymbol containingType,
string name,
Location location,
CSharpSyntaxNode syntax,
MethodKind methodKind,
bool isIterator,
bool isExtensionMethod,
bool isPartial,
bool hasBody,
bool isNullableAnalysisEnabled,
BindingDiagnosticBag diagnostics) :
base(containingType,
syntax.GetReference(),
location,
isIterator: isIterator)
{
Debug.Assert(diagnostics.DiagnosticBag is object);
_name = name;
// The following two values are used to compute and store the initial value of the flags
// However, these two components are placeholders; the correct value will be
// computed lazily later and then the flags will be fixed up.
const bool returnsVoid = false;
DeclarationModifiers declarationModifiers;
(declarationModifiers, HasExplicitAccessModifier) = this.MakeModifiers(methodKind, isPartial, hasBody, location, diagnostics);
var isMetadataVirtualIgnoringModifiers = methodKind == MethodKind.ExplicitInterfaceImplementation; //explicit impls must be marked metadata virtual
this.MakeFlags(methodKind, declarationModifiers, returnsVoid, isExtensionMethod: isExtensionMethod, isNullableAnalysisEnabled: isNullableAnalysisEnabled, isMetadataVirtualIgnoringModifiers: isMetadataVirtualIgnoringModifiers);
_typeParameters = MakeTypeParameters(syntax, diagnostics);
CheckFeatureAvailabilityAndRuntimeSupport(syntax, location, hasBody, diagnostics);
if (hasBody)
{
CheckModifiersForBody(location, diagnostics);
}
var info = ModifierUtils.CheckAccessibility(this.DeclarationModifiers, this, isExplicitInterfaceImplementation: methodKind == MethodKind.ExplicitInterfaceImplementation);
if (info != null)
{
diagnostics.Add(info, location);
}
}
private SourceConstructorSymbol(
SourceMemberContainerTypeSymbol containingType,
Location location,
ConstructorDeclarationSyntax syntax,
MethodKind methodKind,
DiagnosticBag diagnostics) :
base(containingType, syntax.GetReference(), syntax.Body?.GetReference(), ImmutableArray.Create(location))
{
bool modifierErrors;
var declarationModifiers = this.MakeModifiers(syntax.Modifiers, methodKind, location, diagnostics, out modifierErrors);
this.MakeFlags(methodKind, declarationModifiers, returnsVoid: true, isExtensionMethod: false);
if (IsExtern)
{
if (methodKind == MethodKind.Constructor && syntax.Initializer != null)
{
diagnostics.Add(ErrorCode.ERR_ExternHasConstructorInitializer, location, this);
}
if (syntax.Body != null)
{
diagnostics.Add(ErrorCode.ERR_ExternHasBody, location, this);
}
}
var info = ModifierUtils.CheckAccessibility(this.DeclarationModifiers);
if (info != null)
{
diagnostics.Add(info, location);
}
if (!modifierErrors)
{
this.CheckModifiers(methodKind, location, diagnostics);
}
}
private SourceConstructorSymbol(
SourceMemberContainerTypeSymbol containingType,
Location location,
ConstructorDeclarationSyntax syntax,
MethodKind methodKind,
bool isNullableAnalysisEnabled,
BindingDiagnosticBag diagnostics
) : base(containingType, location, syntax, SyntaxFacts.HasYieldOperations(syntax))
{
bool hasBlockBody = syntax.Body != null;
_isExpressionBodied = !hasBlockBody && syntax.ExpressionBody != null;
bool hasBody = hasBlockBody || _isExpressionBodied;
_hasThisInitializer =
syntax.Initializer?.Kind() == SyntaxKind.ThisConstructorInitializer;
bool modifierErrors;
var declarationModifiers = this.MakeModifiers(
syntax.Modifiers,
methodKind,
hasBody,
location,
diagnostics,
out modifierErrors
);
this.MakeFlags(
methodKind,
declarationModifiers,
returnsVoid: true,
isExtensionMethod: false,
isNullableAnalysisEnabled: isNullableAnalysisEnabled
);
if (syntax.Identifier.ValueText != containingType.Name)
{
// This is probably a method declaration with the type missing.
diagnostics.Add(ErrorCode.ERR_MemberNeedsType, location);
}
if (IsExtern)
{
if (methodKind == MethodKind.Constructor && syntax.Initializer != null)
{
diagnostics.Add(ErrorCode.ERR_ExternHasConstructorInitializer, location, this);
}
if (hasBody)
{
diagnostics.Add(ErrorCode.ERR_ExternHasBody, location, this);
}
}
if (methodKind == MethodKind.StaticConstructor)
{
CheckFeatureAvailabilityAndRuntimeSupport(syntax, location, hasBody, diagnostics);
}
var info = ModifierUtils.CheckAccessibility(
this.DeclarationModifiers,
this,
isExplicitInterfaceImplementation: false
);
if (info != null)
{
diagnostics.Add(info, location);
}
if (!modifierErrors)
{
this.CheckModifiers(methodKind, hasBody, location, diagnostics);
}
CheckForBlockAndExpressionBody(syntax.Body, syntax.ExpressionBody, syntax, diagnostics);
}
private SourcePropertyAccessorSymbol(
NamedTypeSymbol containingType,
string name,
SourcePropertySymbol property,
DeclarationModifiers propertyModifiers,
ImmutableArray <MethodSymbol> explicitInterfaceImplementations,
Location location,
AccessorDeclarationSyntax syntax,
MethodKind methodKind,
bool isAutoPropertyAccessor,
bool isExplicitInterfaceImplementation,
DiagnosticBag diagnostics)
: base(containingType,
syntax.GetReference(),
location)
{
_property = property;
_explicitInterfaceImplementations = explicitInterfaceImplementations;
_name = name;
_isAutoPropertyAccessor = isAutoPropertyAccessor;
Debug.Assert(!_property.IsExpressionBodied, "Cannot have accessors in expression bodied lightweight properties");
var hasBody = syntax.Body != null;
var hasExpressionBody = syntax.ExpressionBody != null;
_isExpressionBodied = !hasBody && hasExpressionBody;
bool modifierErrors;
var declarationModifiers = this.MakeModifiers(syntax, isExplicitInterfaceImplementation, hasBody || hasExpressionBody, location, diagnostics, out modifierErrors);
// Include modifiers from the containing property.
propertyModifiers &= ~DeclarationModifiers.AccessibilityMask;
if ((declarationModifiers & DeclarationModifiers.Private) != 0)
{
// Private accessors cannot be virtual.
propertyModifiers &= ~DeclarationModifiers.Virtual;
}
declarationModifiers |= propertyModifiers & ~DeclarationModifiers.Indexer;
// ReturnsVoid property is overridden in this class so
// returnsVoid argument to MakeFlags is ignored.
this.MakeFlags(methodKind, declarationModifiers, returnsVoid: false, isExtensionMethod: false,
isMetadataVirtualIgnoringModifiers: explicitInterfaceImplementations.Any());
CheckFeatureAvailabilityAndRuntimeSupport(syntax, location, hasBody || hasExpressionBody, diagnostics);
if (hasBody || hasExpressionBody)
{
CheckModifiersForBody(syntax, location, diagnostics);
}
var info = ModifierUtils.CheckAccessibility(this.DeclarationModifiers, this, isExplicitInterfaceImplementation);
if (info != null)
{
diagnostics.Add(info, location);
}
if (!modifierErrors)
{
this.CheckModifiers(location, hasBody || hasExpressionBody, isAutoPropertyAccessor, diagnostics);
}
if (this.IsOverride)
{
MethodSymbol overriddenMethod = this.OverriddenMethod;
if ((object)overriddenMethod != null)
{
// If this accessor is overriding a method from metadata, it is possible that
// the name of the overridden method doesn't follow the C# get_X/set_X pattern.
// We should copy the name so that the runtime will recognize this as an override.
_name = overriddenMethod.Name;
}
}
CheckForBlockAndExpressionBody(
syntax.Body, syntax.ExpressionBody, syntax, diagnostics);
}
protected SourceUserDefinedOperatorSymbolBase(
MethodKind methodKind,
string name,
SourceMemberContainerTypeSymbol containingType,
Location location,
BaseMethodDeclarationSyntax syntax,
DiagnosticBag diagnostics) :
base(containingType, syntax.GetReference(), location, isIterator: SyntaxFacts.HasYieldOperations(syntax.Body))
{
_name = name;
_isExpressionBodied = syntax.Body == null && syntax.ExpressionBody != null;
var defaultAccess = DeclarationModifiers.Private;
var allowedModifiers =
DeclarationModifiers.AccessibilityMask |
DeclarationModifiers.Static |
DeclarationModifiers.Extern |
DeclarationModifiers.Unsafe;
bool modifierErrors;
var declarationModifiers = ModifierUtils.MakeAndCheckNontypeMemberModifiers(
syntax.Modifiers, defaultAccess, allowedModifiers, location, diagnostics, out modifierErrors);
this.CheckUnsafeModifier(declarationModifiers, diagnostics);
// We will bind the formal parameters and the return type lazily. For now,
// assume that the return type is non-void; when we do the lazy initialization
// of the parameters and return type we will update the flag if necessary.
this.MakeFlags(methodKind, declarationModifiers, returnsVoid: false, isExtensionMethod: false);
if (this.ContainingType.IsInterface &&
(methodKind == MethodKind.Conversion || name == WellKnownMemberNames.EqualityOperatorName || name == WellKnownMemberNames.InequalityOperatorName))
{
// If we have a conversion or equality/inequality operator in an interface, we already have reported that fact as
// an error. No need to cascade the error further.
return;
}
if (this.ContainingType.IsStatic)
{
// Similarly if we're in a static class, though we have not reported it yet.
// CS0715: '{0}': static classes cannot contain user-defined operators
diagnostics.Add(ErrorCode.ERR_OperatorInStaticClass, location, this);
return;
}
// SPEC: An operator declaration must include both a public and a
// SPEC: static modifier
if (this.DeclaredAccessibility != Accessibility.Public || !this.IsStatic)
{
// CS0558: User-defined operator '...' must be declared static and public
diagnostics.Add(ErrorCode.ERR_OperatorsMustBeStatic, this.Locations[0], this);
}
// SPEC: Because an external operator provides no actual implementation,
// SPEC: its operator body consists of a semicolon. For expression-bodied
// SPEC: operators, the body is an expression. For all other operators,
// SPEC: the operator body consists of a block...
bool hasBody = syntax.HasAnyBody();
if (hasBody && IsExtern)
{
diagnostics.Add(ErrorCode.ERR_ExternHasBody, location, this);
}
else if (!hasBody && !IsExtern && !IsAbstract && !IsPartial)
{
// Do not report that the body is missing if the operator is marked as
// partial or abstract; we will already have given an error for that so
// there's no need to "cascade" the error.
diagnostics.Add(ErrorCode.ERR_ConcreteMissingBody, location, this);
}
// SPEC: It is an error for the same modifier to appear multiple times in an
// SPEC: operator declaration.
var info = ModifierUtils.CheckAccessibility(this.DeclarationModifiers, this, isExplicitInterfaceImplementation: false);
if (info != null)
{
diagnostics.Add(info, location);
}
}
private SourceMemberMethodSymbol(
NamedTypeSymbol containingType,
TypeSymbol explicitInterfaceType,
string name,
Location location,
Binder bodyBinder,
MethodDeclarationSyntax syntax,
MethodKind methodKind,
DiagnosticBag diagnostics) :
base(containingType,
syntax.GetReference(),
// Prefer a block body if both exist
syntax.Body?.GetReference() ?? syntax.ExpressionBody?.GetReference(),
location)
{
_name = name;
_explicitInterfaceType = explicitInterfaceType;
SyntaxTokenList modifiers = syntax.Modifiers;
// The following two values are used to compute and store the initial value of the flags
// However, these two components are placeholders; the correct value will be
// computed lazily later and then the flags will be fixed up.
const bool returnsVoid = false;
var firstParam = syntax.ParameterList.Parameters.FirstOrDefault();
bool isExtensionMethod = firstParam != null &&
!firstParam.IsArgList &&
firstParam.Modifiers.Any(SyntaxKind.ThisKeyword);
bool modifierErrors;
var declarationModifiers = this.MakeModifiers(modifiers, methodKind, location, diagnostics, out modifierErrors);
var isMetadataVirtualIgnoringModifiers = (object)explicitInterfaceType != null; //explicit impls must be marked metadata virtual
this.MakeFlags(methodKind, declarationModifiers, returnsVoid, isExtensionMethod, isMetadataVirtualIgnoringModifiers);
// NOTE: by creating a WithMethodTypeParametersBinder, we are effectively duplicating the
// functionality of the BinderFactory. Unfortunately, we cannot use the BinderFactory
// because it depends on having access to the member list of our containing type and
// that list cannot be complete because we're not finished constructing this member.
// TODO: at least keep this in sync with BinderFactory.VisitMethodDeclaration.
bodyBinder = bodyBinder.WithUnsafeRegionIfNecessary(modifiers);
Binder withTypeParamsBinder;
if (syntax.Arity == 0)
{
withTypeParamsBinder = bodyBinder;
_typeParameters = ImmutableArray <TypeParameterSymbol> .Empty;
}
else
{
var parameterBinder = new WithMethodTypeParametersBinder(this, bodyBinder);
withTypeParamsBinder = parameterBinder;
_typeParameters = MakeTypeParameters(syntax, diagnostics);
}
bool hasBlockBody = syntax.Body != null;
_isExpressionBodied = !hasBlockBody && syntax.ExpressionBody != null;
if (hasBlockBody || _isExpressionBodied)
{
CheckModifiersForBody(location, diagnostics);
}
var info = ModifierUtils.CheckAccessibility(this.DeclarationModifiers);
if (info != null)
{
diagnostics.Add(info, location);
}
if (this.IsPartial)
{
// Partial methods must be completed early because they are matched up
// by signature while producing the enclosing type's member list. However,
// that means any type parameter constraints will be bound before the method
// is added to the containing type. To enable binding of constraints before the
// .ctor completes we hold on to the current binder while the .ctor is executing.
// If we change the handling of partial methods, so that partial methods are
// completed lazily, the 'constraintClauseBinder' field should be removed.
_constraintClauseBinder = withTypeParamsBinder;
state.NotePartComplete(CompletionPart.StartMethodChecks);
MethodChecks(syntax, withTypeParamsBinder, diagnostics);
state.NotePartComplete(CompletionPart.FinishMethodChecks);
_constraintClauseBinder = null;
}
}
private SourcePropertyAccessorSymbol(
NamedTypeSymbol containingType,
string name,
SourcePropertySymbol property,
DeclarationModifiers propertyModifiers,
ImmutableArray <MethodSymbol> explicitInterfaceImplementations,
Location location,
AccessorDeclarationSyntax syntax,
MethodKind methodKind,
bool isAutoPropertyAccessor,
DiagnosticBag diagnostics) :
base(containingType, syntax.GetReference(), syntax.Body.GetReferenceOrNull(), location)
{
this.property = property;
this.explicitInterfaceImplementations = explicitInterfaceImplementations;
this.name = name;
this.isAutoPropertyAccessor = isAutoPropertyAccessor;
bool modifierErrors;
var declarationModifiers = this.MakeModifiers(syntax, location, diagnostics, out modifierErrors);
// Include modifiers from the containing property.
propertyModifiers &= ~DeclarationModifiers.AccessibilityMask;
if ((declarationModifiers & DeclarationModifiers.Private) != 0)
{
// Private accessors cannot be virtual.
propertyModifiers &= ~DeclarationModifiers.Virtual;
}
declarationModifiers |= propertyModifiers & ~DeclarationModifiers.Indexer;
// ReturnsVoid property is overridden in this class so
// returnsVoid argument to MakeFlags is ignored.
this.flags = MakeFlags(methodKind, declarationModifiers, returnsVoid: false, isExtensionMethod: false,
isMetadataVirtualIgnoringModifiers: explicitInterfaceImplementations.Any());
var bodyOpt = syntax.Body;
if (bodyOpt != null)
{
if (containingType.IsInterface)
{
diagnostics.Add(ErrorCode.ERR_InterfaceMemberHasBody, location, this);
}
else if (IsExtern && !IsAbstract)
{
diagnostics.Add(ErrorCode.ERR_ExternHasBody, location, this);
}
else if (IsAbstract && !IsExtern)
{
diagnostics.Add(ErrorCode.ERR_AbstractHasBody, location, this);
}
// Do not report error for IsAbstract && IsExtern. Dev10 reports CS0180 only
// in that case ("member cannot be both extern and abstract").
}
var info = ModifierUtils.CheckAccessibility(this.DeclarationModifiers);
if (info != null)
{
diagnostics.Add(info, location);
}
if (!modifierErrors)
{
this.CheckModifiers(location, isAutoPropertyAccessor, diagnostics);
}
if (this.IsOverride)
{
MethodSymbol overriddenMethod = this.OverriddenMethod;
if ((object)overriddenMethod != null)
{
// If this accessor is overriding a method from metadata, it is possible that
// the name of the overridden method doesn't follow the C# get_X/set_X pattern.
// We should copy the name so that the runtime will recognize this as an override.
this.name = overriddenMethod.Name;
}
}
}
private SourceOrdinaryMethodSymbol(
NamedTypeSymbol containingType,
TypeSymbol explicitInterfaceType,
string name,
Location location,
MethodDeclarationSyntax syntax,
MethodKind methodKind,
DiagnosticBag diagnostics) :
base(containingType,
syntax.GetReference(),
location)
{
_name = name;
_explicitInterfaceType = explicitInterfaceType;
SyntaxTokenList modifiers = syntax.Modifiers;
// The following two values are used to compute and store the initial value of the flags
// However, these two components are placeholders; the correct value will be
// computed lazily later and then the flags will be fixed up.
const bool returnsVoid = false;
var firstParam = syntax.ParameterList.Parameters.FirstOrDefault();
bool isExtensionMethod = firstParam != null &&
!firstParam.IsArgList &&
firstParam.Modifiers.Any(SyntaxKind.ThisKeyword);
bool modifierErrors;
var declarationModifiers = this.MakeModifiers(modifiers, methodKind, location, diagnostics, out modifierErrors);
var isMetadataVirtualIgnoringModifiers = (object)explicitInterfaceType != null; //explicit impls must be marked metadata virtual
this.MakeFlags(methodKind, declarationModifiers, returnsVoid, isExtensionMethod, isMetadataVirtualIgnoringModifiers);
if (syntax.Arity == 0)
{
_typeParameters = ImmutableArray <TypeParameterSymbol> .Empty;
ReportErrorIfHasConstraints(syntax.ConstraintClauses, diagnostics);
}
else
{
_typeParameters = MakeTypeParameters(syntax, diagnostics);
}
bool hasBlockBody = syntax.Body != null;
_isExpressionBodied = !hasBlockBody && syntax.ExpressionBody != null;
_hasAnyBody = hasBlockBody || _isExpressionBodied;
_refKind = syntax.ReturnType.GetRefKind();
if (_hasAnyBody)
{
CheckModifiersForBody(location, diagnostics);
}
var info = ModifierUtils.CheckAccessibility(this.DeclarationModifiers);
if (info != null)
{
diagnostics.Add(info, location);
}
// When a generic method overrides a generic method declared in a base class, or is an
// explicit interface member implementation of a method in a base interface, the method
// shall not specify any type-parameter-constraints-clauses. In these cases, the type
// parameters of the method inherit constraints from the method being overridden or
// implemented
if (syntax.ConstraintClauses.Count > 0)
{
if (syntax.ExplicitInterfaceSpecifier != null ||
syntax.Modifiers.Any(SyntaxKind.OverrideKeyword))
{
diagnostics.Add(
ErrorCode.ERR_OverrideWithConstraints,
syntax.ConstraintClauses[0].WhereKeyword.GetLocation());
}
}
CheckForBlockAndExpressionBody(
syntax.Body, syntax.ExpressionBody, syntax, diagnostics);
}
protected SourceUserDefinedOperatorSymbolBase(
MethodKind methodKind,
string name,
// @MattWindsor91 (Concept-C# 2017)
//
// Default structs can contain these, so I've relaxed the class
// requirement on 'containingType' to allow for this.
//
// A more robust approach to this would be to make a new symbol
// for default user-defined operators and set this back to
// SourceMemberContainerTypeSymbol.
NamedTypeSymbol containingType,
Location location,
SyntaxReference syntaxReference,
SyntaxReference bodySyntaxReference,
SyntaxTokenList modifiersSyntax,
DiagnosticBag diagnostics,
bool isExpressionBodied) :
base(containingType, syntaxReference, bodySyntaxReference, location)
{
_name = name;
_isExpressionBodied = isExpressionBodied;
var isConceptOperator = ContainingType.IsInstance || ContainingType.IsConcept || ContainingType.IsDefaultStruct;
// @t-mawind (is this a good idea?)
var defaultAccess = isConceptOperator ? DeclarationModifiers.Public : DeclarationModifiers.Private;
var allowedModifiers =
DeclarationModifiers.AccessibilityMask |
DeclarationModifiers.Static |
DeclarationModifiers.Extern |
DeclarationModifiers.Unsafe;
bool modifierErrors;
var declarationModifiers = ModifierUtils.MakeAndCheckNontypeMemberModifiers(
modifiersSyntax, defaultAccess, allowedModifiers, location, diagnostics, out modifierErrors);
this.CheckUnsafeModifier(declarationModifiers, diagnostics);
if (ContainingType.IsConcept)
{
// @t-mawind Is there any easier way of doing this?
declarationModifiers |= DeclarationModifiers.Abstract;
}
// We will bind the formal parameters and the return type lazily. For now,
// assume that the return type is non-void; when we do the lazy initialization
// of the parameters and return type we will update the flag if necessary.
this.MakeFlags(methodKind, declarationModifiers, returnsVoid: false, isExtensionMethod: false);
if (this.ContainingType.IsInterface && !this.ContainingType.IsConcept)
{
// If we have an operator in an interface, we already have reported that fact as
// an error. No need to cascade the error further.
return;
}
if (this.ContainingType.IsStatic)
{
// Similarly if we're in a static class, though we have not reported it yet.
// CS0715: '{0}': static classes cannot contain user-defined operators
diagnostics.Add(ErrorCode.ERR_OperatorInStaticClass, location, this);
return;
}
// @t-mawind
// Concept operators must be public and _non_-static.
if (isConceptOperator)
{
if (DeclaredAccessibility != Accessibility.Public || IsStatic)
{
// CS4038: User-defined concept operator '...' must be declared non-static and public.
diagnostics.Add(ErrorCode.ERR_ConceptOperatorsMustBeNonStatic, Locations[0], this);
}
}
else
{
// SPEC: An operator declaration must include both a public and a
// SPEC: static modifier
if (this.DeclaredAccessibility != Accessibility.Public || !this.IsStatic)
{
// CS0558: User-defined operator '...' must be declared static and public
diagnostics.Add(ErrorCode.ERR_OperatorsMustBeStatic, this.Locations[0], this);
}
}
// SPEC: Because an external operator provides no actual implementation,
// SPEC: its operator body consists of a semicolon. For expression-bodied
// SPEC: operators, the body is an expression. For all other operators,
// SPEC: the operator body consists of a block...
if (bodySyntaxReference != null && IsExtern)
{
diagnostics.Add(ErrorCode.ERR_ExternHasBody, location, this);
}
else if (bodySyntaxReference == null && !IsExtern && !IsAbstract && !IsPartial)
{
// Do not report that the body is missing if the operator is marked as
// partial or abstract; we will already have given an error for that so
// there's no need to "cascade" the error.
diagnostics.Add(ErrorCode.ERR_ConcreteMissingBody, location, this);
}
// SPEC: It is an error for the same modifier to appear multiple times in an
// SPEC: operator declaration.
var info = ModifierUtils.CheckAccessibility(this.DeclarationModifiers);
if (info != null)
{
diagnostics.Add(info, location);
}
}
protected void CheckAccessibility(BindingDiagnosticBag diagnostics)
{
ModifierUtils.CheckAccessibility(Modifiers, this, isExplicitInterfaceImplementation: false, diagnostics, ErrorLocation);
}
private SourceMemberMethodSymbol(
NamedTypeSymbol containingType,
TypeSymbol explicitInterfaceType,
string name,
Location location,
MethodDeclarationSyntax syntax,
MethodKind methodKind,
DiagnosticBag diagnostics) :
base(containingType,
syntax.GetReference(),
// Prefer a block body if both exist
syntax.Body?.GetReference() ?? syntax.ExpressionBody?.GetReference(),
location)
{
_name = name;
_explicitInterfaceType = explicitInterfaceType;
SyntaxTokenList modifiers = syntax.Modifiers;
// The following two values are used to compute and store the initial value of the flags
// However, these two components are placeholders; the correct value will be
// computed lazily later and then the flags will be fixed up.
const bool returnsVoid = false;
var firstParam = syntax.ParameterList.Parameters.FirstOrDefault();
bool isExtensionMethod = firstParam != null &&
!firstParam.IsArgList &&
firstParam.Modifiers.Any(SyntaxKind.ThisKeyword);
bool modifierErrors;
var declarationModifiers = this.MakeModifiers(modifiers, methodKind, location, diagnostics, out modifierErrors);
var isMetadataVirtualIgnoringModifiers = (object)explicitInterfaceType != null; //explicit impls must be marked metadata virtual
this.MakeFlags(methodKind, declarationModifiers, returnsVoid, isExtensionMethod, isMetadataVirtualIgnoringModifiers);
// We, of course, have to deal with the possibility of the
// type parameter list being null in MakeTypeParameters now.
_typeParameters = (syntax.Arity == 0) ?
ImmutableArray <TypeParameterSymbol> .Empty :
MakeTypeParameters(syntax, diagnostics);
bool hasBlockBody = syntax.Body != null;
_isExpressionBodied = !hasBlockBody && syntax.ExpressionBody != null;
// @t-mawind
// If this method is on a concept and has a body, then we pretend
// it isn't there in various parts of this class, as it's meant for
// the default struct.
// First, we don't check modifiers for it here.
if (!containingType.IsConcept && (hasBlockBody || _isExpressionBodied))
{
CheckModifiersForBody(location, diagnostics);
}
_refKind = syntax.RefKeyword.Kind().GetRefKind();
var info = ModifierUtils.CheckAccessibility(this.DeclarationModifiers);
if (info != null)
{
diagnostics.Add(info, location);
}
}
