I have two file. One of this is a class declaration and other is interface declaration. Class should implements interface. How can I check in NRefactory if class implements interface methods?
I should give more details.
First file - for example:
class Test : IF
{
}
and the second
interface IF
{
void Foo();
}
I have to read these files and parse with NRefactory. I need to check if class Test implements method from interface IF.
Without compilation and loading compiled assembly.
I found solution in NRefactory code. I've modified this in order to achive my goals. First we should implement visitor which check if classes implements each method from interface:
public class MissingInterfaceMemberImplementationVisitor : DepthFirstAstVisitor
{
private readonly CSharpAstResolver _resolver;
public bool IsInterfaceMemberMissing { get; private set; }
public MissingInterfaceMemberImplementationVisitor(CSharpAstResolver resolver)
{
_resolver = resolver;
IsInterfaceMemberMissing = false;
}
public override void VisitTypeDeclaration(TypeDeclaration typeDeclaration)
{
if (typeDeclaration.ClassType == ClassType.Interface || typeDeclaration.ClassType == ClassType.Enum)
return;
base.VisitTypeDeclaration(typeDeclaration);
var rr = _resolver.Resolve(typeDeclaration);
if (rr.IsError)
return;
foreach (var baseType in typeDeclaration.BaseTypes)
{
var bt = _resolver.Resolve(baseType);
if (bt.IsError || bt.Type.Kind != TypeKind.Interface)
continue;
bool interfaceMissing;
var toImplement = ImplementInterfaceAction.CollectMembersToImplement(rr.Type.GetDefinition(), bt.Type, false, out interfaceMissing);
if (toImplement.Count == 0)
continue;
IsInterfaceMemberMissing = true;
}
}
}
And now we have to read all files, parse them and invoke above class in a following way:
var solutionFiles = new List<FileInfo>();
var trees = new Dictionary<FileInfo, SyntaxTree>();
IProjectContent projectContent = new CSharpProjectContent();
foreach (var file in solutionFiles.Where(f => f.Extension == ".cs").Distinct())
{
var parser = new ICSharpCode.NRefactory.CSharp.CSharpParser();
SyntaxTree syntaxTree;
using (var fs = new FileStream(file.FullName, FileMode.Open, FileAccess.Read, FileShare.Read, 4096, FileOptions.SequentialScan))
{
syntaxTree = parser.Parse(fs, file.FullName);
}
trees.Add(file, syntaxTree);
var unresolvedFile = syntaxTree.ToTypeSystem();
projectContent = projectContent.AddOrUpdateFiles(unresolvedFile);
}
var compilation = projectContent.CreateCompilation();
foreach (var sharpFile in trees)
{
var originalResolver = new CSharpAstResolver(compilation, sharpFile.Value, sharpFile.Value.ToTypeSystem());
var visitor = new MissingInterfaceMemberImplementationVisitor(originalResolver);
sharpFile.Value.AcceptVisitor(visitor);
if (visitor.IsInterfaceMemberMissing)
return false;
}
return true;