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| -rw-r--r-- | library/std/src/process.rs | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/library/std/src/process.rs b/library/std/src/process.rs index d88ab625371..9824cce6c72 100644 --- a/library/std/src/process.rs +++ b/library/std/src/process.rs @@ -2030,6 +2030,11 @@ pub fn id() -> u32 { /// /// The default implementations are returning `libc::EXIT_SUCCESS` to indicate /// a successful execution. In case of a failure, `libc::EXIT_FAILURE` is returned. +/// +/// Because different runtimes have different specifications on the return value +/// of the `main` function, this trait is likely to be available only on +/// standard library's runtime for convenience. Other runtimes are not required +/// to provide similar functionality. #[cfg_attr(not(test), lang = "termination")] #[unstable(feature = "termination_trait_lib", issue = "43301")] #[rustc_on_unimplemented( |