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33561d0f
编写于
1月 25, 2018
作者:
C
Charles Stoner
提交者:
GitHub
1月 25, 2018
浏览文件
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电子邮件补丁
差异文件
Minor changes from features/NullableReferenceTypes (#24444)
上级
d2a7c263
变更
3
隐藏空白更改
内联
并排
Showing
3 changed file
with
48 addition
and
89 deletion
+48
-89
src/Compilers/CSharp/Portable/Binder/Semantics/BestTypeInferrer.cs
...lers/CSharp/Portable/Binder/Semantics/BestTypeInferrer.cs
+9
-17
src/Compilers/CSharp/Portable/Binder/Semantics/Conversions/ConversionsBase.cs
.../Portable/Binder/Semantics/Conversions/ConversionsBase.cs
+39
-57
src/Compilers/CSharp/Portable/Symbols/Source/LambdaSymbol.cs
src/Compilers/CSharp/Portable/Symbols/Source/LambdaSymbol.cs
+0
-15
未找到文件。
src/Compilers/CSharp/Portable/Binder/Semantics/BestTypeInferrer.cs
浏览文件 @
33561d0f
...
...
@@ -7,19 +7,11 @@
namespace
Microsoft.CodeAnalysis.CSharp
{
internal
s
ealed
class
BestTypeInferrer
internal
s
tatic
class
BestTypeInferrer
{
private
readonly
Conversions
_conversions
;
private
BestTypeInferrer
(
Conversions
conversions
)
{
_conversions
=
conversions
;
}
public
static
TypeSymbol
InferBestType
(
ImmutableArray
<
TypeSymbol
>
types
,
Conversions
conversions
,
ref
HashSet
<
DiagnosticInfo
>
useSiteDiagnostics
)
{
var
inferrer
=
new
BestTypeInferrer
(
conversions
);
return
inferrer
.
GetBestType
(
types
,
ref
useSiteDiagnostics
);
return
GetBestType
(
types
,
conversions
,
ref
useSiteDiagnostics
);
}
/// <remarks>
...
...
@@ -118,7 +110,7 @@ public static TypeSymbol InferBestTypeForConditionalOperator(BoundExpression exp
return
InferBestType
(
candidateTypes
.
ToImmutableAndFree
(),
conversions
,
ref
useSiteDiagnostics
);
}
private
TypeSymbol
GetBestType
(
ImmutableArray
<
TypeSymbol
>
type
s
,
ref
HashSet
<
DiagnosticInfo
>
useSiteDiagnostics
)
private
static
TypeSymbol
GetBestType
(
ImmutableArray
<
TypeSymbol
>
types
,
Conversions
conversion
s
,
ref
HashSet
<
DiagnosticInfo
>
useSiteDiagnostics
)
{
// This code assumes that the types in the list are unique.
...
...
@@ -148,7 +140,7 @@ private TypeSymbol GetBestType(ImmutableArray<TypeSymbol> types, ref HashSet<Dia
}
else
{
var
better
=
Better
(
best
,
type
,
ref
useSiteDiagnostics
);
var
better
=
Better
(
best
,
type
,
conversions
,
ref
useSiteDiagnostics
);
if
((
object
)
better
==
null
)
{
...
...
@@ -172,7 +164,7 @@ private TypeSymbol GetBestType(ImmutableArray<TypeSymbol> types, ref HashSet<Dia
for
(
int
i
=
0
;
i
<
bestIndex
;
i
++)
{
TypeSymbol
type
=
types
[
i
];
TypeSymbol
better
=
Better
(
best
,
type
,
ref
useSiteDiagnostics
);
TypeSymbol
better
=
Better
(
best
,
type
,
conversions
,
ref
useSiteDiagnostics
);
if
(
better
!=
best
)
{
...
...
@@ -186,7 +178,7 @@ private TypeSymbol GetBestType(ImmutableArray<TypeSymbol> types, ref HashSet<Dia
/// <summary>
/// Returns the better type amongst the two, with some possible modifications (dynamic/object or tuple names).
/// </summary>
private
TypeSymbol
Better
(
TypeSymbol
type1
,
TypeSymbol
type2
,
ref
HashSet
<
DiagnosticInfo
>
useSiteDiagnostics
)
private
static
TypeSymbol
Better
(
TypeSymbol
type1
,
TypeSymbol
type2
,
Conversions
conversions
,
ref
HashSet
<
DiagnosticInfo
>
useSiteDiagnostics
)
{
// Anything is better than an error sym.
if
(
type1
.
IsErrorType
())
...
...
@@ -199,8 +191,8 @@ private TypeSymbol Better(TypeSymbol type1, TypeSymbol type2, ref HashSet<Diagno
return
type1
;
}
var
t1tot2
=
_
conversions
.
ClassifyImplicitConversionFromType
(
type1
,
type2
,
ref
useSiteDiagnostics
).
Exists
;
var
t2tot1
=
_
conversions
.
ClassifyImplicitConversionFromType
(
type2
,
type1
,
ref
useSiteDiagnostics
).
Exists
;
var
t1tot2
=
conversions
.
ClassifyImplicitConversionFromType
(
type1
,
type2
,
ref
useSiteDiagnostics
).
Exists
;
var
t2tot1
=
conversions
.
ClassifyImplicitConversionFromType
(
type2
,
type1
,
ref
useSiteDiagnostics
).
Exists
;
if
(
t1tot2
&&
t2tot1
)
{
...
...
@@ -216,7 +208,7 @@ private TypeSymbol Better(TypeSymbol type1, TypeSymbol type2, ref HashSet<Diagno
if
(
type1
.
Equals
(
type2
,
TypeCompareKind
.
IgnoreDynamicAndTupleNames
))
{
return
MethodTypeInferrer
.
MergeTupleNames
(
MethodTypeInferrer
.
MergeDynamic
(
type1
,
type2
,
_
conversions
.
CorLibrary
),
type2
);
return
MethodTypeInferrer
.
MergeTupleNames
(
MethodTypeInferrer
.
MergeDynamic
(
type1
,
type2
,
conversions
.
CorLibrary
),
type2
);
}
return
null
;
...
...
src/Compilers/CSharp/Portable/Binder/Semantics/Conversions/ConversionsBase.cs
浏览文件 @
33561d0f
...
...
@@ -703,15 +703,6 @@ public static bool IsBaseInterface(TypeSymbol baseType, TypeSymbol derivedType,
return
false
;
}
// IsBaseClassOfClass determines whether the purported derived type is a class, and if so,
// if the purported base type is one of its base classes.
public
static
bool
IsBaseClassOfClass
(
TypeSymbol
baseType
,
TypeSymbol
derivedType
,
ref
HashSet
<
DiagnosticInfo
>
useSiteDiagnostics
)
{
Debug
.
Assert
((
object
)
baseType
!=
null
);
Debug
.
Assert
((
object
)
derivedType
!=
null
);
return
derivedType
.
IsClassType
()
&&
IsBaseClass
(
derivedType
,
baseType
,
ref
useSiteDiagnostics
);
}
// IsBaseClass returns true if and only if baseType is a base class of derivedType, period.
//
// * interfaces do not have base classes. (Structs, enums and classes other than object do.)
...
...
@@ -2084,46 +2075,26 @@ private bool HasImplicitReferenceConversion(TypeSymbol source, TypeSymbol destin
return
true
;
}
if
(
HasImplicitConversionToInterface
(
source
,
destination
,
ref
useSiteDiagnostics
))
{
return
true
;
}
break
;
return
HasImplicitConversionToInterface
(
source
,
destination
,
ref
useSiteDiagnostics
);
case
TypeKind
.
Interface
:
// SPEC: From any interface-type S to any interface-type T, provided S is derived from T.
// NOTE: This handles variance conversions
if
(
HasImplicitConversionToInterface
(
source
,
destination
,
ref
useSiteDiagnostics
))
{
return
true
;
}
break
;
return
HasImplicitConversionToInterface
(
source
,
destination
,
ref
useSiteDiagnostics
);
case
TypeKind
.
Delegate
:
// SPEC: From any delegate-type to System.Delegate and the interfaces it implements.
// NOTE: This handles variance conversions.
if
(
HasImplicitConversionFromDelegate
(
source
,
destination
,
ref
useSiteDiagnostics
))
{
return
true
;
}
break
;
return
HasImplicitConversionFromDelegate
(
source
,
destination
,
ref
useSiteDiagnostics
);
case
TypeKind
.
TypeParameter
:
if
(
HasImplicitReferenceTypeParameterConversion
((
TypeParameterSymbol
)
source
,
destination
,
ref
useSiteDiagnostics
))
{
return
true
;
}
break
;
return
HasImplicitReferenceTypeParameterConversion
((
TypeParameterSymbol
)
source
,
destination
,
ref
useSiteDiagnostics
);
case
TypeKind
.
Array
:
// SPEC: From an array-type S ... to an array-type T, provided ...
// SPEC: From any array-type to System.Array and the interfaces it implements.
// SPEC: From a single-dimensional array type S[] to IList<T>, provided ...
if
(
HasImplicitConversionFromArray
(
source
,
destination
,
ref
useSiteDiagnostics
))
{
return
true
;
}
break
;
return
HasImplicitConversionFromArray
(
source
,
destination
,
ref
useSiteDiagnostics
);
}
// UNDONE: Implicit conversions involving type parameters that are known to be reference types.
...
...
@@ -2140,24 +2111,26 @@ private bool HasImplicitConversionToInterface(TypeSymbol source, TypeSymbol dest
// * From any class type S to any interface type T provided S implements an interface
// convertible to T.
if
(
source
.
IsClassType
())
{
return
HasAnyBaseInterfaceConversion
(
source
,
destination
,
ref
useSiteDiagnostics
);
}
// * From any interface type S to any interface type T provided S implements an interface
// convertible to T.
// * From any interface type S to any interface type T provided S is not T and S is
// an interface convertible to T.
if
(
source
.
IsClassType
()
&&
HasAnyBaseInterfaceConversion
(
source
,
destination
,
ref
useSiteDiagnostics
))
{
return
true
;
}
if
(
source
.
IsInterfaceType
()
&&
HasAnyBaseInterfaceConversion
(
source
,
destination
,
ref
useSiteDiagnostics
))
if
(
source
.
IsInterfaceType
())
{
return
true
;
}
if
(
HasAnyBaseInterfaceConversion
(
source
,
destination
,
ref
useSiteDiagnostics
))
{
return
true
;
}
if
(
source
.
IsInterfaceType
()
&&
source
!=
destination
&&
HasInterfaceVarianceConversion
(
source
,
destination
,
ref
useSiteDiagnostics
))
{
return
true
;
if
(
source
!=
destination
&&
HasInterfaceVarianceConversion
(
source
,
destination
,
ref
useSiteDiagnostics
))
{
return
true
;
}
}
return
false
;
...
...
@@ -2500,19 +2473,28 @@ private bool HasVariantConversionNoCycleCheck(NamedTypeSymbol source, NamedTypeS
}
TypeParameterSymbol
typeParameterSymbol
=
(
TypeParameterSymbol
)
typeParameters
[
paramIndex
];
if
(
typeParameterSymbol
.
Variance
==
VarianceKind
.
None
)
{
return
false
;
}
if
(
typeParameterSymbol
.
Variance
==
VarianceKind
.
Out
&&
!
HasImplicitReferenceConversion
(
sourceTypeArgument
,
destinationTypeArgument
,
ref
useSiteDiagnostics
)
)
switch
(
typeParameterSymbol
.
Variance
)
{
return
false
;
}
case
VarianceKind
.
None
:
return
false
;
if
(
typeParameterSymbol
.
Variance
==
VarianceKind
.
In
&&
!
HasImplicitReferenceConversion
(
destinationTypeArgument
,
sourceTypeArgument
,
ref
useSiteDiagnostics
))
{
return
false
;
case
VarianceKind
.
Out
:
if
(!
HasImplicitReferenceConversion
(
sourceTypeArgument
,
destinationTypeArgument
,
ref
useSiteDiagnostics
))
{
return
false
;
}
break
;
case
VarianceKind
.
In
:
if
(!
HasImplicitReferenceConversion
(
destinationTypeArgument
,
sourceTypeArgument
,
ref
useSiteDiagnostics
))
{
return
false
;
}
break
;
default
:
throw
ExceptionUtilities
.
UnexpectedValue
(
typeParameterSymbol
.
Variance
);
}
}
}
...
...
@@ -2694,7 +2676,7 @@ private bool HasExplicitReferenceConversion(TypeSymbol source, TypeSymbol destin
}
// SPEC: From any class-type S to any class-type T, provided S is a base class of T.
if
(
IsBaseClassOfClass
(
source
,
destination
,
ref
useSiteDiagnostics
))
if
(
destination
.
IsClassType
()
&&
IsBaseClass
(
destination
,
source
,
ref
useSiteDiagnostics
))
{
return
true
;
}
...
...
src/Compilers/CSharp/Portable/Symbols/Source/LambdaSymbol.cs
浏览文件 @
33561d0f
...
...
@@ -46,21 +46,6 @@ internal sealed class LambdaSymbol : SourceMethodSymbol
_parameters
=
MakeParameters
(
compilation
,
unboundLambda
,
parameterTypes
,
parameterRefKinds
,
diagnostics
);
}
public
LambdaSymbol
(
Symbol
containingSymbol
,
MessageID
messageID
,
SyntaxNode
syntax
,
bool
isSynthesized
)
{
_containingSymbol
=
containingSymbol
;
_messageID
=
messageID
;
_syntax
=
syntax
;
_refKind
=
RefKind
.
None
;
_returnType
=
ErrorTypeSymbol
.
UnknownResultType
;
_isSynthesized
=
isSynthesized
;
_parameters
=
ImmutableArray
<
ParameterSymbol
>.
Empty
;
}
public
MessageID
MessageID
{
get
{
return
_messageID
;
}
}
public
override
MethodKind
MethodKind
...
...
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