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don't panic when you see proc-macros

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This commit is contained in:
QuietMisdreavus 2018-07-13 17:34:58 -05:00
parent bce32b532d
commit a9a6952fd0
1 changed files with 9 additions and 5 deletions
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14
src/librustdoc/clean/inline.rs
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@ -104,7 +104,11 @@ pub fn try_inline(cx: &DocContext, def: Def, name: ast::Name, visited: &mut FxHa
// separately
Def::Macro(did, MacroKind::Bang) => {
record_extern_fqn(cx, did, clean::TypeKind::Macro);
clean::MacroItem(build_macro(cx, did, name))
if let Some(mac) = build_macro(cx, did, name) {
clean::MacroItem(mac)
} else {
return None;
}
}
_ => return None,
};
@ -466,12 +470,12 @@ fn build_static(cx: &DocContext, did: DefId, mutable: bool) -> clean::Static {
}
}
fn build_macro(cx: &DocContext, did: DefId, name: ast::Name) -> clean::Macro {
fn build_macro(cx: &DocContext, did: DefId, name: ast::Name) -> Option<clean::Macro> {
let imported_from = cx.tcx.original_crate_name(did.krate);
let def = match cx.cstore.load_macro_untracked(did, cx.sess()) {
LoadedMacro::MacroDef(macro_def) => macro_def,
// FIXME(jseyfried): document proc macro re-exports
LoadedMacro::ProcMacro(..) => panic!("attempting to document proc-macro re-export"),
LoadedMacro::ProcMacro(..) => return None,
};
let matchers: hir::HirVec<Span> = if let ast::ItemKind::MacroDef(ref def) = def.node {
@ -487,10 +491,10 @@ fn build_macro(cx: &DocContext, did: DefId, name: ast::Name) -> clean::Macro {
format!(" {} => {{ ... }};\n", span.to_src(cx))
}).collect::<String>());
clean::Macro {
Some(clean::Macro {
source,
imported_from: Some(imported_from).clean(cx),
}
})
}
/// A trait's generics clause actually contains all of the predicates for all of