6008f2c982
This commit makes several changes to the stability index infrastructure: * Stability levels are now inherited lexically, i.e., each item's stability level becomes the default for any nested items. * The computed stability level for an item is stored as part of the metadata. When using an item from an external crate, this data is looked up and cached. * The stability lint works from the computed stability level, rather than manual stability attribute annotations. However, the lint still checks only a limited set of item uses (e.g., it does not check every component of a path on import). This will be addressed in a later PR, as part of issue #8962. * The stability lint only applies to items originating from external crates, since the stability index is intended as a promise to downstream crates. * The "experimental" lint is now _allow_ by default. This is because almost all existing crates have been marked "experimental", pending library stabilization. With inheritance in place, this would generate a massive explosion of warnings for every Rust program. The lint should be changed back to deny-by-default after library stabilization is complete. * The "deprecated" lint still warns by default. The net result: we can begin tracking stability index for the standard libraries as we stabilize, without impacting most clients. Closes #13540.
22 lines
795 B
Rust
22 lines
795 B
Rust
// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// compile-flags:-F experimental -D unstable
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// aux-build:lint_output_format.rs
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extern crate lint_output_format;
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use lint_output_format::{foo, bar, baz};
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fn main() {
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let _x = foo(); //~ WARNING #[warn(deprecated)] on by default
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let _y = bar(); //~ ERROR [-F experimental]
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let _z = baz(); //~ ERROR [-D unstable]
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}
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