/// <summary>
/// Creates a new BindingTarget when the method binding has succeeded.
/// </summary>
internal BindingTarget(string name, int actualArgumentCount, MethodTarget target, NarrowingLevel level, RestrictionInfo restrictedArgs) {
_name = name;
_target = target;
_restrictedArgs = restrictedArgs;
_level = level;
_actualArgs = actualArgumentCount;
}
internal static Candidate GetPreferredCandidate(MethodCandidate one, MethodCandidate two, CallTypes callType, MetaObject[] actualTypes)
{
Candidate cmpParams = ParameterWrapper.GetPreferredParameters(one.Parameters, two.Parameters, actualTypes);
if (cmpParams.Chosen())
{
return(cmpParams);
}
Candidate ret = MethodTarget.CompareEquivalentParameters(one.Target, two.Target);
if (ret.Chosen())
{
return(ret);
}
if (CompilerHelpers.IsStatic(one.Target.Method) && !CompilerHelpers.IsStatic(two.Target.Method))
{
return(callType == CallTypes.ImplicitInstance ? Candidate.Two : Candidate.One);
}
else if (!CompilerHelpers.IsStatic(one.Target.Method) && CompilerHelpers.IsStatic(two.Target.Method))
{
return(callType == CallTypes.ImplicitInstance ? Candidate.One : Candidate.Two);
}
return(Candidate.Equivalent);
}
private readonly int _actualArgs; // gets the actual number of arguments provided
/// <summary>
/// Creates a new BindingTarget when the method binding has succeeded.
///
/// OBSOLETE
/// </summary>
internal BindingTarget(string name, int actualArgumentCount, MethodTarget target, NarrowingLevel level, Type[] argTests) {
_name = name;
_target = target;
_argTests = argTests;
_level = level;
_actualArgs = actualArgumentCount;
}
/// <summary>
/// Creates a new BindingTarget when the method binding has succeeded
/// </summary>
internal BindingTarget(string name, int actualArgumentCount, MethodTarget target, NarrowingLevel level, MetaObject[] restrictedArgs)
{
_name = name;
_target = target;
_restrictedArgs = restrictedArgs;
_level = level;
_actualArgs = actualArgumentCount;
}
private readonly int _actualArgs; // gets the actual number of arguments provided
/// <summary>
/// Creates a new BindingTarget when the method binding has succeeded
/// </summary>
internal BindingTarget(string name, int actualArgumentCount, MethodTarget target, NarrowingLevel level, Type[] argTests)
{
_name = name;
_target = target;
_argTests = argTests;
_level = level;
_actualArgs = actualArgumentCount;
}
internal static Candidate CompareEquivalentParameters(MethodTarget one, MethodTarget two)
{
// Prefer normal methods over explicit interface implementations
if (two.Method.IsPrivate && !one.Method.IsPrivate)
{
return(Candidate.One);
}
if (one.Method.IsPrivate && !two.Method.IsPrivate)
{
return(Candidate.Two);
}
// Prefer non-generic methods over generic methods
if (one.Method.IsGenericMethod)
{
if (!two.Method.IsGenericMethod)
{
return(Candidate.Two);
}
else
{
//!!! Need to support selecting least generic method here
return(Candidate.Equivalent);
}
}
else if (two.Method.IsGenericMethod)
{
return(Candidate.One);
}
//prefer methods without out params over those with them
switch (Compare(one._returnBuilder.CountOutParams, two._returnBuilder.CountOutParams))
{
case 1: return(Candidate.Two);
case -1: return(Candidate.One);
}
//prefer methods using earlier conversions rules to later ones
for (int i = Int32.MaxValue; i >= 0;)
{
int maxPriorityThis = FindMaxPriority(one._argBuilders, i);
int maxPriorityOther = FindMaxPriority(two._argBuilders, i);
if (maxPriorityThis < maxPriorityOther)
{
return(Candidate.One);
}
if (maxPriorityOther < maxPriorityThis)
{
return(Candidate.Two);
}
i = maxPriorityThis - 1;
}
return(Candidate.Equivalent);
}
internal MethodCandidate(MethodTarget target, List <ParameterWrapper> parameters)
{
Debug.Assert(target != null);
_target = target;
_parameters = parameters;
_narrowingLevel = NarrowingLevel.None;
parameters.TrimExcess();
}
internal CallFailure(MethodTarget target, SymbolId[] keywordArgs, bool unassignable)
{
_reason = unassignable ? CallFailureReason.UnassignableKeyword : CallFailureReason.DuplicateKeyword;
_target = target;
_keywordArgs = keywordArgs;
}
internal CallFailure(MethodTarget target, ConversionResult[] results)
{
_target = target;
_results = results;
_reason = CallFailureReason.ConversionFailure;
}
internal CallFailure(MethodTarget target, string[] keywordArgs, bool unassignable) {
_reason = unassignable ? CallFailureReason.UnassignableKeyword : CallFailureReason.DuplicateKeyword;
_target = target;
_keywordArgs = keywordArgs;
}
internal CallFailure(MethodTarget target, ConversionResult[] results) {
_target = target;
_results = results;
_reason = CallFailureReason.ConversionFailure;
}
/// <summary>
/// Creates a new BindingTarget when the match was ambiguous
/// </summary>
internal BindingTarget(string name, int actualArgumentCount, MethodTarget[] ambiguousMatches) {
_name = name;
_result = BindingResult.AmbiguousMatch;
_ambiguousMatches = ambiguousMatches;
_actualArgs = actualArgumentCount;
}
internal MethodCandidate(MethodCandidate previous, NarrowingLevel narrowingLevel)
{
this._target = previous.Target;
this._parameters = previous._parameters;
_narrowingLevel = narrowingLevel;
}
