From 1ae4a0cc3487f28b29f36afe8056535afad21e7b Mon Sep 17 00:00:00 2001 From: Josh Triplett Date: Sun, 10 Aug 2025 14:25:43 -0700 Subject: library: Migrate from `cfg_if` to `cfg_select` Migrate the standard library from using the external `cfg_if` crate to using the now-built-in `cfg_select` macro. This does not yet eliminate the dependency from `library/std/Cargo.toml`, because while the standard library itself no longer uses `cfg_if`, it also incorporates the `backtrace` crate, which does. Migration assisted by the following vim command (after selecting the full `cfg_if!` invocation): ``` '<,'>s/\(cfg_if::\)\?cfg_if/cfg_select/ | '<,'>s/^\( *\)} else {/\1}\r\1_ => {/c | '<,'>s/^\( *\)} else if #\[cfg(\(.*\))\] /\1}\r\1\2 => /e | '<,'>s/if #\[cfg(\(.*\))\] {/\1 => {/e ``` This is imperfect, but substantially accelerated the process. This prompts for confirmation on the `} else {` since that can also appear inside one of the arms. This also requires manual intervention to handle any multi-line conditions. --- library/std/src/sys/process/mod.rs | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) (limited to 'library/std/src/sys/process/mod.rs') diff --git a/library/std/src/sys/process/mod.rs b/library/std/src/sys/process/mod.rs index 91c7005a328..9ef5496e57a 100644 --- a/library/std/src/sys/process/mod.rs +++ b/library/std/src/sys/process/mod.rs @@ -1,14 +1,17 @@ -cfg_if::cfg_if! { - if #[cfg(target_family = "unix")] { +cfg_select! { + target_family = "unix" => { mod unix; use unix as imp; - } else if #[cfg(target_os = "windows")] { + } + target_os = "windows" => { mod windows; use windows as imp; - } else if #[cfg(target_os = "uefi")] { + } + target_os = "uefi" => { mod uefi; use uefi as imp; - } else { + } + _ => { mod unsupported; use unsupported as imp; } -- cgit 1.4.1-3-g733a5