| public GetRhsMetaArgument ( ) : DynamicMetaObject | ||
| return | DynamicMetaObject | |
private static ActualArguments/*!*/ CreateActualArguments(List<DynamicMetaObject>/*!*/ normalized, MetaObjectBuilder/*!*/ metaBuilder,
CallArguments/*!*/ args, int hidden, int preSplatLimit, int postSplatLimit, out int lastSplattedArg, out IList list, out ParameterExpression listVariable) {
int firstSplattedArg, splatIndex, collapsedArgCount;
// simple arguments:
for (int i = 0; i < args.SimpleArgumentCount; i++) {
normalized.Add(args.GetSimpleMetaArgument(i));
}
// splat argument:
list = null;
listVariable = null;
if (args.Signature.HasSplattedArgument) {
firstSplattedArg = normalized.Count;
int listLength;
var splatted = args.GetSplattedMetaArgument();
list = (IList)splatted.Value;
metaBuilder.AddSplattedArgumentTest(list, splatted.Expression, out listLength, out listVariable);
int i = 0;
while (i < Math.Min(listLength, preSplatLimit - firstSplattedArg)) {
normalized.Add(MakeSplattedItem(list, listVariable, i));
i++;
}
// skip items that are not needed for overload resolution
splatIndex = normalized.Count;
i = Math.Max(i, listLength - (postSplatLimit - (args.Signature.HasRhsArgument ? 1 : 0)));
while (i < listLength) {
normalized.Add(MakeSplattedItem(list, listVariable, i));
i++;
}
collapsedArgCount = listLength - (normalized.Count - firstSplattedArg);
lastSplattedArg = normalized.Count - 1;
} else {
splatIndex = firstSplattedArg = lastSplattedArg = -1;
collapsedArgCount = 0;
}
Debug.Assert(collapsedArgCount >= 0);
// rhs argument:
if (args.Signature.HasRhsArgument) {
normalized.Add(args.GetRhsMetaArgument());
}
return new ActualArguments(
normalized.ToArray(),
DynamicMetaObject.EmptyMetaObjects,
ArrayUtils.EmptyStrings,
hidden,
collapsedArgCount,
firstSplattedArg,
splatIndex
);
}
// Normalizes arguments: inserts self, expands splats, and inserts rhs arg.
// Adds any restrictions/conditions applied to the arguments to the given meta-builder.
internal static DynamicMetaObject[]/*!*/ NormalizeArguments(MetaObjectBuilder/*!*/ metaBuilder, CallArguments/*!*/ args,
SelfCallConvention callConvention, bool calleeHasBlockParam, bool injectMissingBlockParam) {
var result = new List<DynamicMetaObject>();
// self (instance):
if (callConvention == SelfCallConvention.SelfIsInstance) {
result.Add(args.MetaTarget);
}
// block:
if (calleeHasBlockParam) {
if (args.Signature.HasBlock) {
if (args.GetMetaBlock() == null) {
// the user explicitly passed nil as a block arg:
result.Add(RubyBinder.NullMetaObject);
} else {
// pass BlockParam:
Debug.Assert(metaBuilder.BfcVariable != null);
result.Add(new DynamicMetaObject(metaBuilder.BfcVariable, BindingRestrictions.Empty));
}
} else {
// no block passed into a method with a BlockParam:
result.Add(RubyBinder.NullMetaObject);
}
} else if (injectMissingBlockParam) {
// no block passed into a method w/o a BlockParam (we still need to fill the missing block argument):
result.Add(RubyBinder.NullMetaObject);
}
// self (parameter):
if (callConvention == SelfCallConvention.SelfIsParameter) {
result.Add(args.MetaTarget);
}
// simple arguments:
for (int i = 0; i < args.SimpleArgumentCount; i++) {
result.Add(args.GetSimpleMetaArgument(i));
}
// splat argument:
int listLength;
ParameterExpression listVariable;
if (args.Signature.HasSplattedArgument) {
var splatted = args.GetSplattedMetaArgument();
if (metaBuilder.AddSplattedArgumentTest(splatted.Value, splatted.Expression, out listLength, out listVariable)) {
// AddTestForListArg only returns 'true' if the argument is a List<object>
var list = (List<object>)splatted.Value;
// get arguments, add tests
for (int j = 0; j < listLength; j++) {
result.Add(DynamicMetaObject.Create(
list[j],
Ast.Call(listVariable, typeof(List<object>).GetMethod("get_Item"), AstUtils.Constant(j))
));
}
} else {
// argument is not an array => add the argument itself:
result.Add(splatted);
}
}
// rhs argument:
if (args.Signature.HasRhsArgument) {
result.Add(args.GetRhsMetaArgument());
}
return result.ToArray();
}
