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lint: Document the why and how of the no_mangle const lint

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This commit is contained in:
Richo Healey 2015-02-03 12:09:45 -08:00
parent 73d5d89567
commit b6f55efd5b
1 changed files with 4 additions and 1 deletions
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5
src/librustc/lint/builtin.rs
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@ -2107,7 +2107,10 @@ impl LintPass for InvalidNoMangleItems {
},
ast::ItemConst(..) => {
if attr::contains_name(it.attrs.as_slice(), "no_mangle") {
let msg = "const items should never be #[no_mangle]";
// Const items do not refer to a particular location in memory, and therefore
// don't have anything to attach a symbol to
let msg = "const items should never be #[no_mangle], consider instead using \
`pub static`";
cx.span_lint(NO_MANGLE_CONST_ITEMS, it.span, msg);
}
}