public override void VisitMethodDeclaration(MethodDeclaration methodDeclaration)
{
methodDeclaration.Attributes.AcceptVisitor(this);
if (HasEntryPointSignature(methodDeclaration))
{
return;
}
var eligibleParameters = methodDeclaration.Parameters
.Where(p => p.ParameterModifier != ParameterModifier.Out && p.ParameterModifier != ParameterModifier.Ref)
.ToList();
if (eligibleParameters.Count == 0)
{
return;
}
var declarationResolveResult = ctx.Resolve(methodDeclaration) as MemberResolveResult;
if (declarationResolveResult == null)
{
return;
}
var member = declarationResolveResult.Member;
if (member.IsOverride || member.IsOverridable || member.ImplementedInterfaceMembers.Any())
{
return;
}
var collector = new TypeCriteriaCollector(ctx);
methodDeclaration.AcceptVisitor(collector);
foreach (var parameter in eligibleParameters)
{
ProcessParameter(parameter, methodDeclaration.Body, collector);
}
}
void ProcessParameter(ParameterDeclaration parameter, AstNode rootResolutionNode, TypeCriteriaCollector collector)
{
var localResolveResult = ctx.Resolve(parameter) as LocalResolveResult;
if (localResolveResult == null)
{
return;
}
var variable = localResolveResult.Variable;
var typeKind = variable.Type.Kind;
if (!(typeKind == TypeKind.Class ||
typeKind == TypeKind.Struct ||
typeKind == TypeKind.Interface ||
typeKind == TypeKind.Array) ||
!collector.UsedVariables.Contains(variable))
{
return;
}
var candidateTypes = localResolveResult.Type.GetAllBaseTypes()
.Where(t => t.IsParameterized)
.ToList();
var validTypes =
(from type in candidateTypes
where !tryResolve || ParameterCanBeDeclaredWithBaseTypeIssue.TypeChangeResolvesCorrectly(ctx, parameter, rootResolutionNode, type)
select type).ToList();
if (!validTypes.Any())
{
return;
}
var foundType = validTypes.FirstOrDefault();
if (foundType == null)
{
return;
}
AddDiagnosticAnalyzer(new CodeIssue(parameter.NameToken, string.Format(ctx.TranslateString("Parameter can be {0}"),
foundType.Name), string.Format(ctx.TranslateString("Parameter can be {0}"),
foundType.Name),
script => script.Replace(parameter.Type, CreateShortType(ctx, foundType, parameter))));
}
