private BindingTarget MakeSuccessfulBindingTarget(ApplicableCandidate result, List<ApplicableCandidate> potentialCandidates,
NarrowingLevel level, CandidateSet targetSet) {
return new BindingTarget(
_methodName,
_actualArguments.VisibleCount,
result.Method,
level,
GetRestrictedArgs(result, potentialCandidates, targetSet.Arity)
);
}
private void AddTarget(MethodCandidate target) {
int count = target.ParameterCount;
CandidateSet set;
if (!_candidateSets.TryGetValue(count, out set)) {
set = new CandidateSet(count);
_candidateSets[count] = set;
}
set.Add(target);
}
internal BindingTarget MakeBindingTarget(CandidateSet targetSet) {
List<CallFailure> failures = null;
List<CallFailure> nameBindingFailures = null;
// get candidates whose named arguments can be bind to the parameters:
var potential = EnsureMatchingNamedArgs(targetSet.Candidates, ref nameBindingFailures);
if (potential.Count == 0) {
return MakeFailedBindingTarget(nameBindingFailures.ToArray());
}
// go through all available narrowing levels selecting candidates.
for (NarrowingLevel level = _minLevel; level <= _maxLevel; level++) {
if (failures != null) {
failures.Clear();
}
// only allow candidates whose non-collapsed arguments are convertible to the parameter types:
var applicable = SelectCandidatesWithConvertibleArgs(potential, level, ref failures);
if (applicable.Count == 0) {
continue;
} else if (applicable.Count == 1) {
return MakeSuccessfulBindingTarget(applicable[0], potential, level, targetSet);
}
// see if collapsed arguments be converted to the corresponding element types:
applicable = SelectCandidatesWithConvertibleCollapsedArgs(applicable, level, ref failures);
if (applicable.Count == 0) {
continue;
} else if (applicable.Count == 1) {
return MakeSuccessfulBindingTarget(applicable[0], potential, level, targetSet);
}
var bestCandidate = SelectBestCandidate(applicable, level);
if (bestCandidate != null) {
return MakeSuccessfulBindingTarget(bestCandidate, potential, level, targetSet);
} else {
return MakeAmbiguousBindingTarget(applicable);
}
}
Debug.Assert(failures != null);
if (nameBindingFailures != null) {
failures.AddRange(nameBindingFailures);
}
return MakeFailedBindingTarget(failures.ToArray());
}
private CandidateSet BuildExpandedTargetSet(int count) {
var set = new CandidateSet(count);
if (_paramsCandidates != null) {
foreach (MethodCandidate maker in _paramsCandidates) {
MethodCandidate target = maker.MakeParamsExtended(count, _argNames);
if (target != null) {
set.Add(target);
}
}
}
return set;
}
