commit | 1fd951651a5a5724bc9ff6e455363ae669582a7c | [log] [tgz] |
---|---|---|
author | Joel Galenson <jgalenson@google.com> | Mon Aug 30 09:13:23 2021 -0700 |
committer | Joel Galenson <jgalenson@google.com> | Mon Aug 30 09:13:23 2021 -0700 |
tree | 7d24c195854da755bcd5bd5757826ee5b905bdcd | |
parent | 77fd95d8bcb0eede59b9cec7bd232f5108734597 [diff] |
Update TEST_MAPPING Test: None Change-Id: Ic110e5bfba3bdc96c9065156fa6efafca697f465
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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