public static MetaObject TryBind(RubyContext /*!*/ context, GetMemberBinder /*!*/ binder, MetaObject /*!*/ target)
{
Assert.NotNull(context, target);
var metaBuilder = new MetaObjectBuilder();
var contextExpression = Ast.Constant(context);
metaBuilder.AddTargetTypeTest(target.Value, target.Expression, context, contextExpression);
RubyMemberInfo method = context.ResolveMethod(target.Value, binder.Name, true).InvalidateSitesOnOverride();
if (method != null && RubyModule.IsMethodVisible(method, false))
{
// we need to create a bound member:
metaBuilder.Result = Ast.Constant(new RubyMethod(target.Value, method, binder.Name));
}
else
{
// TODO:
// We need to throw an exception if we don't find method_missing so that our version update optimization works:
// This limits interop with other languages.
//
// class B CLR type with method 'foo'
// class C < B Ruby class
// x = C.new
//
// 1. x.GET("foo") from Ruby
// No method found or CLR method found -> fallback to Python
// Python might see its method foo or might just fallback to .NET,
// in any case it will add rule [1] with restriction on type of C w/o Ruby version check.
// 2. B.define_method("foo")
// This doesn't update C due to the optimization (there is no overridden method foo in C).
// 3. x.GET("foo") from Ruby
// This will not invoke the binder since the rule [1] is still valid.
//
object symbol = SymbolTable.StringToId(binder.Name);
RubyCallAction.BindToMethodMissing(metaBuilder, binder.Name,
new CallArguments(
new MetaObject(contextExpression, Restrictions.Empty, context),
new[] {
target,
new MetaObject(Ast.Constant(symbol), Restrictions.Empty, symbol)
},
RubyCallSignature.Simple(1)
),
method != null
);
}
// TODO: we should return null if we fail, we need to throw exception for now:
return(metaBuilder.CreateMetaObject(binder, MetaObject.EmptyMetaObjects));
}
public static MetaObject TryBind(RubyContext /*!*/ context, InvokeMemberBinder /*!*/ binder, MetaObject /*!*/ target, MetaObject /*!*/[] /*!*/ args)
{
Assert.NotNull(context, target);
var metaBuilder = new MetaObjectBuilder();
RubyCallAction.Bind(metaBuilder, binder.Name,
new CallArguments(
new MetaObject(Ast.Constant(context), Restrictions.Empty, context),
target,
args,
RubyCallSignature.Simple(binder.Arguments.Count)
)
);
// TODO: we should return null if we fail, we need to throw exception for now:
return(metaBuilder.CreateMetaObject(binder, MetaObject.EmptyMetaObjects));
}
public static MetaObject TryBind(RubyContext /*!*/ context, CreateInstanceBinder /*!*/ binder, MetaObject /*!*/ target, MetaObject /*!*/[] /*!*/ args)
{
Assert.NotNull(context, binder, target, args);
var metaBuilder = new MetaObjectBuilder();
RubyCallAction.Bind(metaBuilder, "new",
new CallArguments(
new MetaObject(Ast.Constant(context), Restrictions.Empty, context),
target,
args,
RubyCallSignature.Simple(args.Length)
)
);
// TODO: we should return null if we fail, we need to throw exception due to version update optimization:
return(metaBuilder.CreateMetaObject(binder, MetaObject.EmptyMetaObjects));
}
/// <summary>
/// Creates a runtime-bound call site binder.
/// </summary>
public static RubyCallAction /*!*/ Make(RubyContext /*!*/ context, string /*!*/ methodName, int argumentCount)
{
return(Make(context, methodName, RubyCallSignature.Simple(argumentCount)));
}