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体验新版 GitCode,发现更多精彩内容 >>
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dbb963eb
编写于
3月 02, 2017
作者:
N
Neal Gafter
提交者:
GitHub
3月 02, 2017
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电子邮件补丁
差异文件
Fix a NullReferenceException in DataFlowAnalysis.VariablesDeclared (#17375)
Fixes #17281
上级
72057f54
变更
2
隐藏空白更改
内联
并排
Showing
2 changed file
with
37 addition
and
1 deletion
+37
-1
src/Compilers/CSharp/Portable/FlowAnalysis/VariablesDeclaredWalker.cs
...s/CSharp/Portable/FlowAnalysis/VariablesDeclaredWalker.cs
+2
-1
src/Compilers/CSharp/Test/Semantic/FlowAnalysis/RegionAnalysisTests.cs
.../CSharp/Test/Semantic/FlowAnalysis/RegionAnalysisTests.cs
+35
-0
未找到文件。
src/Compilers/CSharp/Portable/FlowAnalysis/VariablesDeclaredWalker.cs
浏览文件 @
dbb963eb
...
...
@@ -77,7 +77,8 @@ private void NoteDeclaredPatternVariables(BoundPattern pattern)
if
(
IsInside
&&
pattern
.
Kind
==
BoundKind
.
DeclarationPattern
)
{
var
decl
=
(
BoundDeclarationPattern
)
pattern
;
if
(
decl
.
Variable
.
Kind
==
SymbolKind
.
Local
)
// The variable may be null if it is a discard designation `_`.
if
(
decl
.
Variable
?.
Kind
==
SymbolKind
.
Local
)
{
// Because this API only returns local symbols and parameters,
// we exclude pattern variables that have become fields in scripts.
...
...
src/Compilers/CSharp/Test/Semantic/FlowAnalysis/RegionAnalysisTests.cs
浏览文件 @
dbb963eb
...
...
@@ -4751,6 +4751,41 @@ public void F(ulong? p)
Assert
.
Equal
(
"this, p"
,
GetSymbolNamesJoined
(
dataFlowAnalysisResults
.
WrittenOutside
));
}
[
Fact
]
[
WorkItem
(
17281
,
"https://github.com/dotnet/roslyn/issues/17281"
)]
public
void
DiscardVsVariablesDeclared
()
{
var
dataFlowAnalysisResults
=
CompileAndAnalyzeDataFlowStatements
(
@"
class A { }
class Test
{
private void Repro(A node)
{
/*<bind>*/
switch (node)
{
case A _:
break;
case Unknown:
break;
default:
return;
}
/*</bind>*/
}
}"
);
Assert
.
Empty
(
dataFlowAnalysisResults
.
Captured
);
Assert
.
Empty
(
dataFlowAnalysisResults
.
VariablesDeclared
);
Assert
.
Empty
(
dataFlowAnalysisResults
.
AlwaysAssigned
);
Assert
.
Equal
(
"node"
,
GetSymbolNamesJoined
(
dataFlowAnalysisResults
.
DataFlowsIn
));
Assert
.
Empty
(
dataFlowAnalysisResults
.
DataFlowsOut
);
Assert
.
Equal
(
"node"
,
GetSymbolNamesJoined
(
dataFlowAnalysisResults
.
ReadInside
));
Assert
.
Equal
(
null
,
GetSymbolNamesJoined
(
dataFlowAnalysisResults
.
ReadOutside
));
Assert
.
Empty
(
dataFlowAnalysisResults
.
WrittenInside
);
Assert
.
Equal
(
"this, node"
,
GetSymbolNamesJoined
(
dataFlowAnalysisResults
.
WrittenOutside
));
}
#
endregion
#
region
"Misc."
...
...
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