private IEnumerable <ISymbol> GetAssignedFieldsFromType(TypeDeclarationWithSymbol typeDeclarationWithSymbol, SemanticModel model)
{
var typeDeclaration = typeDeclarationWithSymbol.TypeDeclaration;
var descendants = typeDeclaration.DescendantNodes(p => SkipNestedTypes(typeDeclaration, p));
return(descendants
.OfType <AssignmentExpressionSyntax>()
.Select(s => s.Left)
.Union(
descendants
.OfType <PostfixUnaryExpressionSyntax>()
.Select(s => s.Operand))
.Union(
descendants
.OfType <PrefixUnaryExpressionSyntax>()
.Select(s => s.Operand)
)
.Union(
descendants
.OfType <InvocationExpressionSyntax>()
.SelectMany(s => s.ArgumentList.Arguments.Where(p => !p.RefOrOutKeyword.IsKind(SyntaxKind.None)))
.Select(s => s.Expression)
)
.Select(s => new { Symbol = model.GetSymbolInfo(s).Symbol, Expression = s })
.Where(p => p.Symbol != null)
.Where(p => SkipFieldsFromItsOwnConstructor(typeDeclarationWithSymbol, p.Expression, p.Symbol))
.Select(s => s.Symbol));
}
private void CaptureAssignedFields(TypeDeclarationSyntax typeDeclaration, SemanticModel semanticModel, List <ISymbol> assignedFields)
{
var t = new TypeDeclarationWithSymbol {
TypeDeclaration = typeDeclaration, NamedTypeSymbol = semanticModel.GetDeclaredSymbol(typeDeclaration)
};
var fields = GetAssignedFieldsFromType(t, semanticModel);
assignedFields.AddRange(fields);
}
private bool SkipFieldsFromItsOwnConstructor(TypeDeclarationWithSymbol type, ExpressionSyntax assignmentExpression, ISymbol assignmentSymbol)
{
var parentConstructor = assignmentExpression.Ancestors().OfType <ConstructorDeclarationSyntax>().FirstOrDefault();
if (parentConstructor == null)
{
return(true);
}
return
(assignmentSymbol.ContainingType != type.NamedTypeSymbol ||
assignmentSymbol.IsStatic != parentConstructor.Modifiers.Any(p => p.IsKind(SyntaxKind.StaticKeyword)));
}
private static IEnumerable<ISymbol> GetAssignedFieldsFromType(TypeDeclarationWithSymbol typeDeclarationWithSymbol, SemanticModel model)
{
var typeDeclaration = typeDeclarationWithSymbol.TypeDeclaration;
var descendants = typeDeclaration.DescendantNodes(p => SkipNestedTypes(typeDeclaration, p));
return descendants
.OfType<AssignmentExpressionSyntax>()
.Select(s => s.Left)
.Union(
descendants
.OfType<PostfixUnaryExpressionSyntax>()
.Select(s => s.Operand))
.Union(
descendants
.OfType<PrefixUnaryExpressionSyntax>()
.Select(s => s.Operand)
)
.Union(
descendants
.OfType<InvocationExpressionSyntax>()
.SelectMany(s => s.ArgumentList.Arguments.Where(p => !p.RefOrOutKeyword.IsKind(SyntaxKind.None)))
.Select(s => s.Expression)
)
.Select(s => new { Symbol = model.GetSymbolInfo(s).Symbol, Expression = s })
.Where(p => p.Symbol != null)
.Where(p => SkipFieldsFromItsOwnConstructor(typeDeclarationWithSymbol, p.Expression, p.Symbol))
.Select(s => s.Symbol);
}
private static void CaptureAssignedFields(TypeDeclarationSyntax typeDeclaration, SemanticModel semanticModel, List<ISymbol> assignedFields)
{
var t = new TypeDeclarationWithSymbol { TypeDeclaration = typeDeclaration, NamedTypeSymbol = semanticModel.GetDeclaredSymbol(typeDeclaration) };
var fields = GetAssignedFieldsFromType(t, semanticModel);
assignedFields.AddRange(fields);
}
private static bool SkipFieldsFromItsOwnConstructor(TypeDeclarationWithSymbol type, ExpressionSyntax assignmentExpression, ISymbol assignmentSymbol)
{
var parentConstructor = assignmentExpression.Ancestors().OfType<ConstructorDeclarationSyntax>().FirstOrDefault();
if (parentConstructor == null)
return true;
return
assignmentSymbol.ContainingType != type.NamedTypeSymbol ||
assignmentSymbol.IsStatic != parentConstructor.Modifiers.Any(p => p.IsKind(SyntaxKind.StaticKeyword));
}
