protected override Expression VisitScoped(ScopedCallSite callSite, ParameterExpression provider)
{
var keyExpression = Expression.Constant(
callSite.Key,
typeof(object));
var resolvedExpression = Expression.Variable(typeof(object), "resolved");
var resolvedServices = GetResolvedServices(provider);
var tryGetValueExpression = Expression.Call(
resolvedServices,
TryGetValueMethodInfo,
keyExpression,
resolvedExpression);
var assignExpression = Expression.Assign(
resolvedExpression, VisitCallSite(callSite.ServiceCallSite, provider));
var addValueExpression = Expression.Call(
resolvedServices,
AddMethodInfo,
keyExpression,
resolvedExpression);
var blockExpression = Expression.Block(
typeof(object),
new[] {
resolvedExpression
},
Expression.IfThen(
Expression.Not(tryGetValueExpression),
Expression.Block(assignExpression, addValueExpression)),
resolvedExpression);
return(blockExpression);
}
protected abstract TResult VisitScoped(ScopedCallSite scopedCallSite, TArgument argument);