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https://github.com/tokio-rs/tracing.git
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2572f68339
* core: support `no-std` + `alloc` Motivation Users have expressed interest in using `tracing` on no_std platforms with `liballoc`. Solution This branch adds `no_std` support to `tracing-core` by adding a `std` feature flag (on by default) which can be disabled to use `libcore` + `liballoc` instead of `libstd`. When the `std` feature is disabled, `tracing-core` will use `spin::Mutex` rather than `std::sync::Mutex`, and the thread-local scoped dispatcher will be disabled (since it necessitates a defined OS threading model, which may not exist on `no_std` platforms). Refs: #213 Signed-off-by: Eliza Weisman <eliza@buoyant.io>
49 lines
1.2 KiB
Rust
49 lines
1.2 KiB
Rust
use tracing_core::{
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callsite::Callsite,
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metadata,
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metadata::{Kind, Level, Metadata},
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subscriber::Interest,
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};
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#[test]
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fn metadata_macro_api() {
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// This test should catch any inadvertent breaking changes
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// caused by changes to the macro.
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struct TestCallsite;
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impl Callsite for TestCallsite {
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fn set_interest(&self, _: Interest) {
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unimplemented!("test")
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}
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fn metadata(&self) -> &Metadata<'_> {
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unimplemented!("test")
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}
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}
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static CALLSITE: TestCallsite = TestCallsite;
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let _metadata = metadata! {
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name: "test_metadata",
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target: "test_target",
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level: Level::DEBUG,
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fields: &["foo", "bar", "baz"],
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callsite: &CALLSITE,
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kind: Kind::SPAN,
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};
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let _metadata = metadata! {
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name: "test_metadata",
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target: "test_target",
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level: Level::TRACE,
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fields: &[],
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callsite: &CALLSITE,
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kind: Kind::EVENT,
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};
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let _metadata = metadata! {
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name: "test_metadata",
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target: "test_target",
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level: Level::INFO,
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fields: &[],
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callsite: &CALLSITE,
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kind: Kind::EVENT
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};
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}
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