internal override void GenerateMethodBody(TypeCompilationState compilationState, DiagnosticBag diagnostics)
{
var F = new SyntheticBoundNodeFactory(this, this.SyntaxNode, compilationState, diagnostics);
try
{
MethodSymbol? equalityComparer_GetHashCode = null;
MethodSymbol? equalityComparer_get_Default = null;
BoundExpression currentHashValue;
if (ContainingType.BaseTypeNoUseSiteDiagnostics.IsObjectType())
{
if (_equalityContract.IsStatic)
{
F.CloseMethod(F.ThrowNull());
return;
}
// There are no base record types.
// Get hash code of the equality contract and combine it with hash codes for field values.
ensureEqualityComparerHelpers(F, ref equalityComparer_GetHashCode, ref equalityComparer_get_Default);
currentHashValue = MethodBodySynthesizer.GenerateGetHashCode(equalityComparer_GetHashCode!, equalityComparer_get_Default!, F.Property(F.This(), _equalityContract), F);
}
else
{
// There are base record types.
// Get base.GetHashCode() and combine it with hash codes for field values.
var overridden = OverriddenMethod;
if (overridden is null || overridden.ReturnType.SpecialType != SpecialType.System_Int32)
{
// There was a problem with overriding, an error was reported elsewhere
F.CloseMethod(F.ThrowNull());
return;
}
currentHashValue = F.Call(F.Base(overridden.ContainingType), overridden);
}
// bound HASH_FACTOR
BoundLiteral? boundHashFactor = null;
foreach (var f in ContainingType.GetFieldsToEmit())
{
if (!f.IsStatic)
{
ensureEqualityComparerHelpers(F, ref equalityComparer_GetHashCode, ref equalityComparer_get_Default);
currentHashValue = MethodBodySynthesizer.GenerateHashCombine(currentHashValue, equalityComparer_GetHashCode!, equalityComparer_get_Default!, ref boundHashFactor,
F.Field(F.This(), f),
F);
}
}
F.CloseMethod(F.Block(F.Return(currentHashValue)));
}
catch (SyntheticBoundNodeFactory.MissingPredefinedMember ex)
{
diagnostics.Add(ex.Diagnostic);
F.CloseMethod(F.ThrowNull());
}
internal override void GenerateMethodBody(TypeCompilationState compilationState, DiagnosticBag diagnostics)
{
var F = new SyntheticBoundNodeFactory(this, ContainingType.GetNonNullSyntaxNode(), compilationState, diagnostics);
try
{
MethodSymbol equalityComparer_GetHashCode = F.WellKnownMethod(WellKnownMember.System_Collections_Generic_EqualityComparer_T__GetHashCode, isOptional: false) !;
MethodSymbol equalityComparer_get_Default = F.WellKnownMethod(WellKnownMember.System_Collections_Generic_EqualityComparer_T__get_Default, isOptional: false) !;
BoundExpression currentHashValue;
if (ContainingType.BaseTypeNoUseSiteDiagnostics.IsObjectType())
{
// There are no base record types.
// Get hash code of the equality contract and combine it with hash codes for field values.
currentHashValue = MethodBodySynthesizer.GenerateGetHashCode(equalityComparer_GetHashCode, equalityComparer_get_Default, F.Property(F.This(), _equalityContract), F);
}
else
{
// There are base record types.
// Get base.GetHashCode() and combine it with hash codes for field values.
var overridden = OverriddenMethod;
currentHashValue = F.Call(F.Base(overridden.ContainingType), overridden);
}
// bound HASH_FACTOR
BoundLiteral?boundHashFactor = null;
foreach (var f in ContainingType.GetFieldsToEmit())
{
if (!f.IsStatic)
{
currentHashValue = MethodBodySynthesizer.GenerateHashCombine(currentHashValue, equalityComparer_GetHashCode, equalityComparer_get_Default, ref boundHashFactor,
F.Field(F.This(), f),
F);
}
}
F.CloseMethod(F.Block(F.Return(currentHashValue)));
}
catch (SyntheticBoundNodeFactory.MissingPredefinedMember ex)
{
diagnostics.Add(ex.Diagnostic);
F.CloseMethod(F.ThrowNull());
}
}
internal override void GenerateMethodBodyStatements(SyntheticBoundNodeFactory F, ArrayBuilder <BoundStatement> statements, BindingDiagnosticBag diagnostics)
{
// Tracking issue for copy constructor in inheritance scenario: https://github.com/dotnet/roslyn/issues/44902
// Write assignments to fields
// .ctor(DerivedRecordType original) : base((BaseRecordType)original)
// {
// this.field1 = parameter.field1
// ...
// this.fieldN = parameter.fieldN
// }
var param = F.Parameter(Parameters[0]);
foreach (var field in ContainingType.GetFieldsToEmit())
{
if (!field.IsStatic)
{
statements.Add(F.Assignment(F.Field(F.This(), field), F.Field(param, field)));
}
}
}
internal override void GenerateMethodBodyStatements(SyntheticBoundNodeFactory F, ArrayBuilder <BoundStatement> statements, DiagnosticBag diagnostics)
{
// PROTOTYPE: Handle inheritance
// Write assignments to fields
//
// {
// this.field1 = parameter.field1
// ...
// this.fieldN = parameter.fieldN
// }
var param = F.Parameter(Parameters[0]);
foreach (var field in ContainingType.GetFieldsToEmit())
{
if (!field.IsStatic)
{
statements.Add(F.Assignment(F.Field(F.This(), field), F.Field(param, field)));
}
}
}
internal override void GenerateMethodBody(TypeCompilationState compilationState, DiagnosticBag diagnostics)
{
var F = new SyntheticBoundNodeFactory(this, ContainingType.GetNonNullSyntaxNode(), compilationState, diagnostics);
var other = F.Parameter(Parameters[0]);
BoundExpression?retExpr;
if (IsOverride)
{
// This method is an override of a strongly-typed Equals method from a base record type.
// The definition of the method is as follows, and _otherEqualsMethod
// is the method to delegate to (see B.Equals(A), C.Equals(A), C.Equals(B) above):
//
// override bool Equals(Base other) => Equals(other as Derived);
retExpr = F.Call(
F.This(),
_otherEqualsMethod !,
F.As(other, ContainingType));
}
else
{
// This method is the strongly-typed Equals method where the parameter type is
// the containing type.
if (_otherEqualsMethod is null)
{
// There are no base record types.
// The definition of the method is as follows (see A.Equals(A) above):
//
// virtual bool Equals(T other) =>
// other != null &&
// EqualityContract == other.EqualityContract &&
// field1 == other.field1 && ... && fieldN == other.fieldN;
// other != null
Debug.Assert(!other.Type.IsStructType());
retExpr = F.ObjectNotEqual(other, F.Null(F.SpecialType(SpecialType.System_Object)));
// EqualityContract == other.EqualityContract
var contractsEqual = F.Binary(
BinaryOperatorKind.ObjectEqual,
F.SpecialType(SpecialType.System_Boolean),
F.Property(F.This(), _equalityContract),
F.Property(other, _equalityContract));
retExpr = retExpr is null ? contractsEqual : F.LogicalAnd(retExpr, contractsEqual);
}
else
{
// There are base record types.
// The definition of the method is as follows, and _otherEqualsMethod
// is the corresponding method on the nearest base record type to
// delegate to (see B.Equals(B), C.Equals(C) above):
//
// virtual bool Equals(Derived other) =>
// base.Equals((Base)other) &&
// field1 == other.field1 && ... && fieldN == other.fieldN;
retExpr = F.Call(
F.Base(_otherEqualsMethod.ContainingType),
_otherEqualsMethod !,
F.Convert(_otherEqualsMethod.Parameters[0].Type, other));
}
// field1 == other.field1 && ... && fieldN == other.fieldN
// https://github.com/dotnet/roslyn/issues/44895: Should compare fields from non-record base classes.
var fields = ArrayBuilder <FieldSymbol> .GetInstance();
foreach (var f in ContainingType.GetFieldsToEmit())
{
if (!f.IsStatic)
{
fields.Add(f);
}
}
if (fields.Count > 0)
{
retExpr = MethodBodySynthesizer.GenerateFieldEquals(
retExpr,
other,
fields,
F);
}
fields.Free();
}
F.CloseMethod(F.Block(F.Return(retExpr)));
}
internal override void GenerateMethodBody(TypeCompilationState compilationState, DiagnosticBag diagnostics)
{
var F = new SyntheticBoundNodeFactory(this, ContainingType.GetNonNullSyntaxNode(), compilationState, diagnostics);
try
{
var other = F.Parameter(Parameters[0]);
BoundExpression?retExpr;
// This method is the strongly-typed Equals method where the parameter type is
// the containing type.
if (ContainingType.BaseTypeNoUseSiteDiagnostics.IsObjectType())
{
if (_equalityContract.GetMethod is null)
{
// The equality contract isn't usable, an error was reported elsewhere
F.CloseMethod(F.ThrowNull());
return;
}
if (_equalityContract.IsStatic || !_equalityContract.Type.Equals(DeclaringCompilation.GetWellKnownType(WellKnownType.System_Type), TypeCompareKind.AllIgnoreOptions))
{
// There is a signature mismatch, an error was reported elsewhere
F.CloseMethod(F.ThrowNull());
return;
}
// There are no base record types.
// The definition of the method is as follows
//
// virtual bool Equals(T other) =>
// other != null &&
// EqualityContract == other.EqualityContract &&
// field1 == other.field1 && ... && fieldN == other.fieldN;
// other != null
Debug.Assert(!other.Type.IsStructType());
retExpr = F.ObjectNotEqual(other, F.Null(F.SpecialType(SpecialType.System_Object)));
// EqualityContract == other.EqualityContract
var contractsEqual = F.Call(receiver: null, F.WellKnownMethod(WellKnownMember.System_Type__op_Equality),
F.Property(F.This(), _equalityContract),
F.Property(other, _equalityContract));
retExpr = F.LogicalAnd(retExpr, contractsEqual);
}
else
{
MethodSymbol?baseEquals = ContainingType.GetMembersUnordered().OfType <SynthesizedRecordBaseEquals>().Single().OverriddenMethod;
if (baseEquals is null || !baseEquals.ContainingType.Equals(ContainingType.BaseTypeNoUseSiteDiagnostics, TypeCompareKind.AllIgnoreOptions) ||
baseEquals.ReturnType.SpecialType != SpecialType.System_Boolean)
{
// There was a problem with overriding of base equals, an error was reported elsewhere
F.CloseMethod(F.ThrowNull());
return;
}
// There are base record types.
// The definition of the method is as follows, and baseEquals
// is the corresponding method on the nearest base record type to
// delegate to:
//
// virtual bool Equals(Derived other) =>
// base.Equals((Base)other) &&
// field1 == other.field1 && ... && fieldN == other.fieldN;
retExpr = F.Call(
F.Base(baseEquals.ContainingType),
baseEquals,
F.Convert(baseEquals.Parameters[0].Type, other));
}
// field1 == other.field1 && ... && fieldN == other.fieldN
var fields = ArrayBuilder <FieldSymbol> .GetInstance();
bool foundBadField = false;
foreach (var f in ContainingType.GetFieldsToEmit())
{
if (!f.IsStatic)
{
fields.Add(f);
var parameterType = f.Type;
if (parameterType.IsUnsafe())
{
diagnostics.Add(ErrorCode.ERR_BadFieldTypeInRecord, f.Locations.FirstOrNone(), parameterType);
foundBadField = true;
}
else if (parameterType.IsRestrictedType())
{
// We'll have reported a diagnostic elsewhere (SourceMemberFieldSymbol.TypeChecks)
foundBadField = true;
}
}
}
if (fields.Count > 0 && !foundBadField)
{
retExpr = MethodBodySynthesizer.GenerateFieldEquals(
retExpr,
other,
fields,
F);
}
fields.Free();
F.CloseMethod(F.Block(F.Return(retExpr)));
}
catch (SyntheticBoundNodeFactory.MissingPredefinedMember ex)
{
diagnostics.Add(ex.Diagnostic);
F.CloseMethod(F.ThrowNull());
}
}
