1aed58ceb6
I saw someone post a code sample that contained these two attributes, which immediately made me suspicious. My suspicions were confirmed when I did a small test and checked the compiler source code to confirm that in these cases, `#[inline]` is indeed ignored (because you can't exactly `LocalCopy`an unmangled symbol since that would lead to duplicate symbols, and doing a mix of an unmangled `GloballyShared` and mangled `LocalCopy` instantiation is too complicated for our current instatiation mode logic, which I don't want to change right now). So instead, emit the usual unused attribute lint with a message saying that the attribute is ignored in this position. I think this is not 100% true, since I expect LLVM `inlinehint` to still be applied to such a function, but that's not why people use this attribute, they use it for the `LocalCopy` instantiation mode, where it doesn't work.
30 lines
724 B
Rust
30 lines
724 B
Rust
//! Ensure the unused_attributes lint fires for externally exported functions with `#[inline]`,
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//! because `#[inline]` is ignored for such functions.
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#![crate_type = "lib"]
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#![feature(linkage)]
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#![feature(naked_functions)]
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#![deny(unused_attributes)]
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#[inline]
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//~^ ERROR: `#[inline]` is ignored on externally exported functions
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#[no_mangle]
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fn no_mangle() {}
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#[inline]
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//~^ ERROR: `#[inline]` is ignored on externally exported functions
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#[export_name = "export_name"]
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fn export_name() {}
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#[inline]
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//~^ ERROR: `#[inline]` is ignored on externally exported functions
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#[linkage = "external"]
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fn external_linkage() {}
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#[inline]
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fn normal() {}
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#[inline]
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#[linkage = "internal"] // not exported
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fn internal_linkage() {}
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