Handle SyntaxKind.ImplicitStackAllocArrayCreationExpression

Author: nxtn

StyleCop.Analyzers/StyleCop.Analyzers.Test.CSharp8/MaintainabilityRules/SA1119CSharp8UnitTests.cs

@@ -160,13 +160,15 @@ public async Task TestStackAllocExpressionInExpressionAsync()
 {
     public unsafe void TestMethod()
     {
-        var ptr = stackalloc byte[1];
-        var span = (stackalloc byte[1]);
+        var ptr1 = stackalloc byte[1];
+        var span1 = (stackalloc byte[1]);
+        var ptr2 = stackalloc[] { 0 };
+        var span2 = (stackalloc[] { 0 });
     }
 }
 ";
 
-            await VerifyCSharpDiagnosticAsync(LanguageVersion.CSharp8, testCode, DiagnosticResult.EmptyDiagnosticResults).ConfigureAwait(false);
+            await VerifyCSharpDiagnosticAsync(LanguageVersion.CSharp8, testCode, DiagnosticResult.EmptyDiagnosticResults, CancellationToken.None).ConfigureAwait(false);
         }
     }
 }

StyleCop.Analyzers/StyleCop.Analyzers.Test/Verifiers/StyleCopCodeFixVerifier`2.cs

@@ -45,7 +45,7 @@ internal static Task VerifyCSharpDiagnosticAsync(string source, DiagnosticResult
         internal static Task VerifyCSharpDiagnosticAsync(LanguageVersion? languageVersion, string source, DiagnosticResult expected, CancellationToken cancellationToken)
             => StyleCopDiagnosticVerifier<TAnalyzer>.VerifyCSharpDiagnosticAsync(languageVersion, source, expected, cancellationToken);
 
-        internal static Task VerifyCSharpDiagnosticAsync(LanguageVersion? languageVersion, string source, DiagnosticResult[] expected, CancellationToken cancellationToken = default)
+        internal static Task VerifyCSharpDiagnosticAsync(LanguageVersion? languageVersion, string source, DiagnosticResult[] expected, CancellationToken cancellationToken)
             => StyleCopDiagnosticVerifier<TAnalyzer>.VerifyCSharpDiagnosticAsync(languageVersion, source, settings: null, expected, cancellationToken);
 
         internal static Task VerifyCSharpDiagnosticAsync(LanguageVersion? languageVersion, string source, string settings, DiagnosticResult[] expected, CancellationToken cancellationToken)

StyleCop.Analyzers/StyleCop.Analyzers/MaintainabilityRules/SA1119StatementMustNotUseUnnecessaryParenthesis.cs

@@ -137,7 +137,8 @@ private static void HandleParenthesizedExpression(SyntaxNodeAnalysisContext cont
                         return;
                     }
 
-                    if (node.Expression.IsKind(SyntaxKind.StackAllocArrayCreationExpression)
+                    if ((node.Expression.IsKind(SyntaxKind.StackAllocArrayCreationExpression)
+                        || node.Expression.IsKind(SyntaxKindEx.ImplicitStackAllocArrayCreationExpression))
                         && node.Parent.IsKind(SyntaxKind.EqualsValueClause))
                     {
                         return;