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This makes it possible for the `unsafe(...)` syntax to only be valid at the top level, and the `NestedMetaItem`s will automatically reject `unsafe(...)`.
38 lines
1.1 KiB
Rust
38 lines
1.1 KiB
Rust
#![feature(unsafe_attributes)]
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#[unsafe(proc_macro)]
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//~^ ERROR: is not an unsafe attribute
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//~| ERROR attribute is only usable with crates of the `proc-macro` crate type
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pub fn a() {}
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#[unsafe(proc_macro_derive(Foo))]
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//~^ ERROR: is not an unsafe attribute
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//~| ERROR attribute is only usable with crates of the `proc-macro` crate type
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pub fn b() {}
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#[proc_macro_derive(unsafe(Foo))]
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//~^ ERROR attribute is only usable with crates of the `proc-macro` crate type
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//~| ERROR: expected identifier, found keyword `unsafe`
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pub fn c() {}
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#[unsafe(proc_macro_attribute)]
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//~^ ERROR: is not an unsafe attribute
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//~| ERROR attribute is only usable with crates of the `proc-macro` crate type
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pub fn d() {}
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#[unsafe(allow(dead_code))]
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//~^ ERROR: is not an unsafe attribute
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pub fn e() {}
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#[unsafe(allow(unsafe(dead_code)))]
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//~^ ERROR: is not an unsafe attribute
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//~| ERROR: malformed lint attribute input
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//~| ERROR: malformed lint attribute input
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//~| ERROR: expected identifier, found keyword `unsafe`
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//~| ERROR: malformed lint attribute input
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//~| ERROR: malformed lint attribute input
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pub fn f() {}
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fn main() {}
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