public Enumerator(MemberExpressionCacheKey key)
{
Current = null;
_members = key.Members;
_memberExpression = key.MemberExpression;
_index = -1;
}
private static Func <TModel, object> CompileForChainedMemberAccess(
Expression <Func <TModel, TResult> > expression,
MemberExpression memberExpression)
{
// Input: () => m.Member1.Member2
// Output: () => (m == null || m.Member1 == null) ? null : m.Member1.Member2
var key = new MemberExpressionCacheKey(typeof(TModel), memberExpression);
if (_chainedMemberAccessCache.TryGetValue(key, out var result))
{
return(result);
}
var cacheableKey = key.MakeCacheable();
result = _chainedMemberAccessCache.GetOrAdd(cacheableKey, Rewrite(expression, memberExpression));
return(result);
}
