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Document the symbol Visibility enum #134261

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Dec 14, 2024
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Document the symbol Visibility enum #134261

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Document the symbol Visibility enum
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@bjorn3
bjorn3 committed Dec 13, 2024
commit af3721e8132a8d5268a1e263f7058cdb65fbbac2
12 changes: 12 additions & 0 deletions compiler/rustc_middle/src/mir/mono.rs
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Expand Up @@ -294,10 +294,22 @@ pub enum Linkage {
Common,
}

/// Specifies the symbol visibility with regards to dynamic linking.
///
/// Visibility doesn't have any effect when linkage is internal.
///
/// DSO means dynamic shared object, that is a dynamically linked executable or dylib.
#[derive(Copy, Clone, PartialEq, Debug, HashStable)]
pub enum Visibility {
/// Export the symbol from the DSO and apply overrides of the symbol by outside DSOs to within
/// the DSO if the object file format supports this.
Default,
/// Hide the symbol outside of the defining DSO even when external linkage is used to export it
/// from the object file.
Hidden,
/// Export the symbol from the DSO, but don't apply overrides of the symbol by outside DSOs to
/// within the DSO. Equivalent to default visibility with object file formats that don't support
/// overriding exported symbols by another DSO.
Protected,
}

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