diff options
Diffstat (limited to 'src/test/ui/generator/print/generator-print-verbose-1.rs')
-rw-r--r-- | src/test/ui/generator/print/generator-print-verbose-1.rs | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/src/test/ui/generator/print/generator-print-verbose-1.rs b/src/test/ui/generator/print/generator-print-verbose-1.rs new file mode 100644 index 000000000..fe0687722 --- /dev/null +++ b/src/test/ui/generator/print/generator-print-verbose-1.rs @@ -0,0 +1,60 @@ +// compile-flags: -Zverbose + +// Same as: src/test/ui/generator/issue-68112.stderr + +#![feature(generators, generator_trait)] + +use std::{ + cell::RefCell, + sync::Arc, + pin::Pin, + ops::{Generator, GeneratorState}, +}; + +pub struct Ready<T>(Option<T>); +impl<T> Generator<()> for Ready<T> { + type Return = T; + type Yield = (); + fn resume(mut self: Pin<&mut Self>, _args: ()) -> GeneratorState<(), T> { + GeneratorState::Complete(self.0.take().unwrap()) + } +} +pub fn make_gen1<T>(t: T) -> Ready<T> { + Ready(Some(t)) +} + +fn require_send(_: impl Send) {} + +fn make_non_send_generator() -> impl Generator<Return = Arc<RefCell<i32>>> { + make_gen1(Arc::new(RefCell::new(0))) +} + +fn test1() { + let send_gen = || { + let _non_send_gen = make_non_send_generator(); + yield; + }; + require_send(send_gen); + //~^ ERROR generator cannot be sent between threads +} + +pub fn make_gen2<T>(t: T) -> impl Generator<Return = T> { + || { + yield; + t + } +} +fn make_non_send_generator2() -> impl Generator<Return = Arc<RefCell<i32>>> { + make_gen2(Arc::new(RefCell::new(0))) +} + +fn test2() { + let send_gen = || { + let _non_send_gen = make_non_send_generator2(); + yield; + }; + require_send(send_gen); + //~^ ERROR `RefCell<i32>` cannot be shared between threads safely +} + +fn main() {} |