commit | f00347218206462eb3bb77e8a3ef35a0a0907531 | [log] [tgz] |
---|---|---|
author | Matthew Maurer <mmaurer@google.com> | Tue Jul 07 00:50:58 2020 +0000 |
committer | Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com> | Tue Jul 07 00:50:58 2020 +0000 |
tree | d585bdf233225a882a5b55ddb7b8cc40fe0d7589 | |
parent | 79e9b14b73c1e2df5d4bc5bbeea41cc0972fd616 [diff] | |
parent | fd529a3675e45e2e0e5bd41d0666819a4982a651 [diff] |
Support building all variants. am: d91f36e799 am: fd529a3675 Original change: https://android-review.googlesource.com/c/platform/external/rust/crates/cfg-if/+/1356185 Change-Id: I3bce7df14c756ebce3b98e18300e139e59380270
A macro to ergonomically define an item depending on a large number of #[cfg] parameters. Structured like an if-else chain, the first matching branch is the item that gets emitted.
[dependencies] cfg-if = "0.1"
cfg_if::cfg_if! { if #[cfg(unix)] { fn foo() { /* unix specific functionality */ } } else if #[cfg(target_pointer_width = "32")] { fn foo() { /* non-unix, 32-bit functionality */ } } else { fn foo() { /* fallback implementation */ } } } fn main() { foo(); }
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