{"action":"opened","issue":{"url":"https://api.github.com/repos/dotnet/corefx/issues/32523","repository_url":"https://api.github.com/repos/dotnet/corefx","labels_url":"https://api.github.com/repos/dotnet/corefx/issues/32523/labels{/name}","comments_url":"https://api.github.com/repos/dotnet/corefx/issues/32523/comments","events_url":"https://api.github.com/repos/dotnet/corefx/issues/32523/events","html_url":"https://github.com/dotnet/corefx/issues/32523","id":364749296,"node_id":"MDU6SXNzdWUzNjQ3NDkyOTY=","number":32523,"title":"Expression trees should support Span<T>, stackalloc, ref struct","user":{"login":"vermorel","id":932309,"node_id":"MDQ6VXNlcjkzMjMwOQ==","avatar_url":"https://avatars1.githubusercontent.com/u/932309?v=4","gravatar_id":"","url":"https://api.github.com/users/vermorel","html_url":"https://github.com/vermorel","followers_url":"https://api.github.com/users/vermorel/followers","following_url":"https://api.github.com/users/vermorel/following{/other_user}","gists_url":"https://api.github.com/users/vermorel/gists{/gist_id}","starred_url":"https://api.github.com/users/vermorel/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/vermorel/subscriptions","organizations_url":"https://api.github.com/users/vermorel/orgs","repos_url":"https://api.github.com/users/vermorel/repos","events_url":"https://api.github.com/users/vermorel/events{/privacy}","received_events_url":"https://api.github.com/users/vermorel/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2018-09-28T05:47:24Z","updated_at":"2018-09-28T05:47:24Z","closed_at":null,"author_association":"NONE","body":"[Expression Trees](https://docs.microsoft.com/en-us/dotnet/csharp/expression-trees) are very useful and capable when it comes to generate specialized high-performance code. In this area, `Span<T>`, `stackalloc` and `ref struct` are probably among the most significant recent additions to .NET performance-wise. Yet, it is not possible to use any of those constructs in Expression Trees. It would be very useful if Expression Trees were extended to support those newer .NET capabilities."}}
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