private static MSA.LambdaExpression /*!*/ CreateLambda(string /*!*/ name, MSA.ParameterExpression /*!*/[] /*!*/ parameters, MSA.Expression /*!*/ body)
{
Type lambdaType = DynamicSiteHelpers.GetStandardDelegateType(AstFactory.GetSignature(parameters, typeof(object)));
if (lambdaType == null)
{
// to many parameters for Func<> delegate -> use object[]:
MSA.ParameterExpression array = Ast.Parameter(typeof(object[]), "#params");
var actualParameters = new MSA.ParameterExpression[] { parameters[0], parameters[1], array };
parameters = ArrayUtils.ShiftLeft(parameters, 2);
var bodyWithParamInit = new MSA.Expression[parameters.Length + 1];
for (int i = 0; i < parameters.Length; i++)
{
bodyWithParamInit[i] = Ast.Assign(parameters[i], Ast.ArrayIndex(array, Ast.Constant(i)));
}
bodyWithParamInit[parameters.Length] = body;
return(Ast.Lambda(
RubyMethodInfo.ParamsArrayDelegateType,
Ast.Block(
new ReadOnlyCollection <MSA.ParameterExpression>(parameters),
new ReadOnlyCollection <MSA.Expression>(bodyWithParamInit)
),
name,
new ReadOnlyCollection <MSA.ParameterExpression>(actualParameters)
));
}
else
{
return(Ast.Lambda(
lambdaType,
body,
name,
new ReadOnlyCollection <MSA.ParameterExpression>(parameters)
));
}
}