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e78d78868a
Forbid cannot be overriden. When someome tries to do this anyways, it results in a hard error. That makes sense. Except it doesn't, because macros. Macros may reasonably use `#[deny]` in their expansion to assert that their expanded code follows the lint. This is doesn't work when the output gets expanded into a `forbid()` context. This is pretty silly, since both the macros and the code agree on the lint! Therefore, we allow `#[deny(..)]`ing a lint that's already forbidden, keeping the level at forbid.
51 lines
1.4 KiB
Rust
51 lines
1.4 KiB
Rust
// This test is checking that you cannot override a `forbid` by adding in other
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// attributes later in the same scope. (We already ensure that you cannot
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// override it in nested scopes).
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// If you turn off deduplicate diagnostics (which rustc turns on by default but
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// compiletest turns off when it runs ui tests), then the errors are
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// (unfortunately) repeated here because the checking is done as we read in the
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// errors, and currently that happens two or three different times, depending on
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// compiler flags.
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//
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// I decided avoiding the redundant output was not worth the time in engineering
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// effort for bug like this, which 1. end users are unlikely to run into in the
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// first place, and 2. they won't see the redundant output anyway.
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//@ compile-flags: -Z deduplicate-diagnostics=yes
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#![forbid(forbidden_lint_groups)]
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fn forbid_first(num: i32) -> i32 {
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#![forbid(unused)]
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#![deny(unused)]
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#![warn(unused)]
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//~^ ERROR: warn(unused) incompatible with previous forbid
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//~| WARNING being phased out
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#![allow(unused)]
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num * num
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}
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fn forbid_last(num: i32) -> i32 {
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#![deny(unused)]
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#![warn(unused)]
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#![allow(unused)]
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#![forbid(unused)]
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num * num
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}
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fn forbid_multiple(num: i32) -> i32 {
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#![forbid(unused)]
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#![forbid(unused)]
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num * num
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}
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fn main() {
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forbid_first(10);
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forbid_last(10);
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forbid_multiple(10);
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}
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