Commits on Sep 27, 2016

1. rustc: Tweak expansion order of custom derive …

   This commit alters the expansion order of custom macros-1.1 style `#[derive]`
   modes. Instead of left-to-right the expansion now happens in three categories,
   each of which is internally left-to-right:
   
   * Old-style custom derive (`#[derive_Foo]`) is expanded
   * New-style custom derive (macros 1.1) is expanded
   * Built in derive modes are expanded
   
   This gives built in derive modes maximal knowledge about the struct that's being
   expanded and also avoids pesky issues like exposing `#[structural_match]` or
   `#[rustc_copy_clone_marker]`.
   
   cc rust-lang#35900

   

   alexcrichton committed Sep 27, 2016
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