macros: fix #[tokio::main]
without rt-core
#2139
Merged
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The Tokio runtime provides a "shell" runtime when
rt-core
is notavailable. This shell runtime is enough to support
#[tokio::main
] and`#[tokio::test].
A previous change disabled these two attr macros when
rt-core
was notselected. This patch fixes this by re-enabling the
main
andtest
attr macros without
rt-core
and adds some integration tests to preventfuture regressions.
While I was in here, I also moved the entry point macros from
lib.rs
toentry.rs
. This will add space for future proc macros.