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async: Give predictable, reserved name to binding generated from .awa…
…it expressions. This name makes it to debuginfo and allows debuggers to identify such bindings and their captured versions in suspended async fns.
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// This test makes sure that the generator field capturing the awaitee in a `.await` expression | ||
// is called "__awaitee" in debuginfo. This name must not be changed since debuggers and debugger | ||
// extensions rely on the field having this name. | ||
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// ignore-tidy-linelength | ||
// compile-flags: -C debuginfo=2 --edition=2018 | ||
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async fn foo() {} | ||
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async fn async_fn_test() { | ||
foo().await; | ||
} | ||
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// NONMSVC: [[GEN:!.*]] = !DICompositeType(tag: DW_TAG_structure_type, name: "{async_fn_env#0}", | ||
// MSVC: [[GEN:!.*]] = !DICompositeType(tag: DW_TAG_union_type, name: "enum$<async_fn_debug_awaitee_field::async_fn_test::async_fn_env$0>", | ||
// CHECK: [[SUSPEND_STRUCT:!.*]] = !DICompositeType(tag: DW_TAG_structure_type, name: "Suspend0", scope: [[GEN]], | ||
// CHECK: !DIDerivedType(tag: DW_TAG_member, name: "__awaitee", scope: [[SUSPEND_STRUCT]], {{.*}}, baseType: [[AWAITEE_TYPE:![0-9]*]], | ||
// NONMSVC: [[AWAITEE_TYPE]] = !DICompositeType(tag: DW_TAG_structure_type, name: "GenFuture<async_fn_debug_awaitee_field::foo::{async_fn_env#0}>", | ||
// MSVC: [[AWAITEE_TYPE]] = !DICompositeType(tag: DW_TAG_structure_type, name: "GenFuture<enum$<async_fn_debug_awaitee_field::foo::async_fn_env$0> >", | ||
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fn main() { | ||
let _fn = async_fn_test(); | ||
} |