public SupportsIndexingCriterion(IType returnType, IEnumerable <IType> argumentTypes, AlConversions conversions, bool isWriteAccess = false)
{
if (returnType == null)
{
throw new ArgumentNullException("returnType");
}
if (argumentTypes == null)
{
throw new ArgumentNullException("argumentTypes");
}
if (conversions == null)
{
throw new ArgumentNullException("conversions");
}
this.returnType = returnType;
this.argumentTypes = argumentTypes.ToList();
this.conversions = conversions;
this.isWriteAccess = isWriteAccess;
}
public GatherVisitor(BaseRefactoringContext ctx)
: base(ctx)
{
conversion = new AlConversions(ctx.Compilation);
}
public override void VisitIndexerExpression(IndexerExpression indexerExpression)
{
base.VisitIndexerExpression(indexerExpression);
var localResolveResult = context.Resolve(indexerExpression.Target) as LocalResolveResult;
if (localResolveResult == null)
{
return;
}
var resolveResult = context.Resolve(indexerExpression);
if (localResolveResult == null)
{
return;
}
var parent = indexerExpression.Parent;
while (parent is ParenthesizedExpression)
{
parent = parent.Parent;
}
if (parent is DirectionExpression)
{
// The only types which are indexable and where the indexing expression
// results in a variable is an actual array type
AddCriterion(localResolveResult.Variable, new IsArrayTypeCriterion());
}
else if (resolveResult is ArrayAccessResolveResult)
{
var arrayResolveResult = (ArrayAccessResolveResult)resolveResult;
var arrayType = arrayResolveResult.Array.Type as ArrayType;
if (arrayType != null)
{
var parameterTypes = arrayResolveResult.Indexes.Select(index => index.Type);
var criterion = new SupportsIndexingCriterion(arrayType.ElementType, parameterTypes, AlConversions.Get(context.Compilation));
AddCriterion(localResolveResult.Variable, criterion);
}
}
else if (resolveResult is AlInvocationResolveResult)
{
var invocationResolveResult = (AlInvocationResolveResult)resolveResult;
var parameterTypes = invocationResolveResult.Arguments.Select(arg => arg.Type);
var criterion = new SupportsIndexingCriterion(invocationResolveResult.Member.ReturnType, parameterTypes, AlConversions.Get(context.Compilation));
AddCriterion(localResolveResult.Variable, criterion);
}
}