rustc: remove the explicit count from the lang_item macro. #11657
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We can use a secondary macro to calculate the count from the information we're already having to pass to the lang items macro.
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I did this as part of #11409 as well (https://github.com/mozilla/rust/pull/11409/files#diff-855fca46fb86dbacaee6e1226c2bd4a7L38), but it looks like it's taking awhile to land... |
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We can use a secondary macro to calculate the count from the information we're already having to pass to the lang items macro.
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cfg Attribute Stripping for Proc Macro Expansion This will attempt to process cfg attributes and cfg_attr attributes for proc macro expansion.  Closes rust-lang#8434 , rust-lang#11657, and rust-lang#13904
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We can use a secondary macro to calculate the count from the information
we're already having to pass to the lang items macro.