public static void FieldPrivateCtorCalledByInitializer(SearchScope scope)
{
var code = @"
namespace N
{
internal class C
{
public static readonly C Default = new C();
private readonly int value;
private C()
{
this.value = 1;
}
}
}";
var syntaxTree = CSharpSyntaxTree.ParseText(code);
var compilation = CSharpCompilation.Create("test", new[] { syntaxTree }, MetadataReferences.FromAttributes());
var semanticModel = compilation.GetSemanticModel(syntaxTree);
var field = semanticModel.GetDeclaredSymbolSafe(syntaxTree.FindFieldDeclaration("private readonly int value"), CancellationToken.None);
var bar = syntaxTree.FindTypeDeclaration("C");
Assert.AreEqual(true, AssignmentExecutionWalker.FirstFor(field, bar, scope, semanticModel, CancellationToken.None, out var result));
Assert.AreEqual("this.value = 1", result.ToString());
Assert.AreEqual(true, AssignmentExecutionWalker.SingleFor(field, bar, scope, semanticModel, CancellationToken.None, out result));
Assert.AreEqual("this.value = 1", result.ToString());
using (var walker = AssignmentExecutionWalker.For(field, bar, scope, semanticModel, CancellationToken.None))
{
Assert.AreEqual("this.value = 1", walker.Assignments.Single().ToString());
}
}
public static void FieldWithCtorArg(SearchScope scope)
{
var code = @"
namespace N
{
internal class C
{
private readonly int value;
internal C(int arg)
{
this.value = arg;
}
}
}";
var syntaxTree = CSharpSyntaxTree.ParseText(code);
var compilation = CSharpCompilation.Create("test", new[] { syntaxTree }, MetadataReferences.FromAttributes());
var semanticModel = compilation.GetSemanticModel(syntaxTree);
var value = syntaxTree.FindMemberAccessExpression("this.value");
var ctor = syntaxTree.FindConstructorDeclaration("C(int arg)");
var field = semanticModel.GetSymbolSafe(value, CancellationToken.None);
Assert.AreEqual(true, AssignmentExecutionWalker.FirstFor(field, ctor, scope, semanticModel, CancellationToken.None, out var result));
Assert.AreEqual("this.value = arg", result.ToString());
Assert.AreEqual(true, AssignmentExecutionWalker.SingleFor(field, ctor, scope, semanticModel, CancellationToken.None, out result));
Assert.AreEqual("this.value = arg", result.ToString());
using (var walker = AssignmentExecutionWalker.For(field, ctor, scope, semanticModel, CancellationToken.None))
{
Assert.AreEqual("this.value = arg", walker.Assignments.Single().ToString());
}
}
public void FieldWithCtorArgViaProperty(Scope scope)
{
var testCode = @"
namespace RoslynSandbox
{
internal class Foo
{
private int number;
internal Foo(int arg)
{
this.Number = arg;
}
public int Number
{
get { return this.number; }
set { this.number = value; }
}
}
}";
var syntaxTree = CSharpSyntaxTree.ParseText(testCode);
var compilation = CSharpCompilation.Create("test", new[] { syntaxTree }, MetadataReferences.FromAttributes());
var semanticModel = compilation.GetSemanticModel(syntaxTree);
var value = syntaxTree.FindMemberAccessExpression("this.number");
var ctor = syntaxTree.FindConstructorDeclaration("Foo(int arg)");
AssignmentExpressionSyntax result;
var field = semanticModel.GetSymbolSafe(value, CancellationToken.None);
if (scope != Scope.Member)
{
Assert.AreEqual(true, AssignmentExecutionWalker.FirstFor(field, ctor, scope, semanticModel, CancellationToken.None, out result));
Assert.AreEqual("this.number = value", result.ToString());
Assert.AreEqual(true, AssignmentExecutionWalker.SingleFor(field, ctor, scope, semanticModel, CancellationToken.None, out result));
Assert.AreEqual("this.number = value", result.ToString());
using (var walker = AssignmentExecutionWalker.For(field, ctor, scope, semanticModel, CancellationToken.None))
{
Assert.AreEqual("this.number = value", walker.Assignments.Single().ToString());
}
}
else
{
Assert.AreEqual(false, AssignmentExecutionWalker.FirstFor(field, ctor, scope, semanticModel, CancellationToken.None, out result));
}
}
internal static bool AssignsSymbolInSetter(IPropertySymbol property, ISymbol symbol, SemanticModel semanticModel, CancellationToken cancellationToken)
{
var setMethod = property?.SetMethod;
if (setMethod == null ||
setMethod.DeclaringSyntaxReferences.Length == 0)
{
return(false);
}
if (TryGetSetter(property, cancellationToken, out AccessorDeclarationSyntax setter))
{
if (AssignmentExecutionWalker.FirstFor(symbol, setter, Scope.Instance, semanticModel, cancellationToken, out _))
{
return(true);
}
}
return(false);
}
public static void FieldInPropertyExpressionBody(SearchScope scope)
{
var code = @"
namespace N
{
internal class C
{
private int number;
internal C()
{
var i = this.Number;
}
public int Number => this.number = 3;
}
}";
var syntaxTree = CSharpSyntaxTree.ParseText(code);
var compilation = CSharpCompilation.Create("test", new[] { syntaxTree }, MetadataReferences.FromAttributes());
var semanticModel = compilation.GetSemanticModel(syntaxTree);
var value = syntaxTree.FindMemberAccessExpression("this.number");
var ctor = syntaxTree.FindConstructorDeclaration("C()");
AssignmentExpressionSyntax result;
var field = semanticModel.GetSymbolSafe(value, CancellationToken.None);
if (scope != SearchScope.Member)
{
Assert.AreEqual(true, AssignmentExecutionWalker.FirstFor(field, ctor, scope, semanticModel, CancellationToken.None, out result));
Assert.AreEqual("this.number = 3", result.ToString());
Assert.AreEqual(true, AssignmentExecutionWalker.SingleFor(field, ctor, scope, semanticModel, CancellationToken.None, out result));
Assert.AreEqual("this.number = 3", result.ToString());
using (var walker = AssignmentExecutionWalker.For(field, ctor, scope, semanticModel, CancellationToken.None))
{
Assert.AreEqual("this.number = 3", walker.Assignments.Single().ToString());
}
}
else
{
Assert.AreEqual(false, AssignmentExecutionWalker.FirstFor(field, ctor, scope, semanticModel, CancellationToken.None, out _));
}
}