check_builtin_macro_attribute(ecx, meta_item, sym::global_allocator);
let orig_item = item.clone();
- let not_static = || {
- ecx.sess.parse_sess.span_diagnostic.span_err(item.span(), "allocators must be statics");
- vec![orig_item.clone()]
- };
// Allow using `#[global_allocator]` on an item statement
// FIXME - if we get deref patterns, use them to reduce duplication here
- let (item, is_stmt, ty_span) = match &item {
- Annotatable::Item(item) => match item.kind {
- ItemKind::Static(ref ty, ..) => (item, false, ecx.with_def_site_ctxt(ty.span)),
- _ => return not_static(),
- },
- Annotatable::Stmt(stmt) => match &stmt.kind {
- StmtKind::Item(item_) => match item_.kind {
- ItemKind::Static(ref ty, ..) => (item_, true, ecx.with_def_site_ctxt(ty.span)),
- _ => return not_static(),
- },
- _ => return not_static(),
- },
- _ => return not_static(),
- };
+ let (item, is_stmt, ty_span) =
+ if let Annotatable::Item(item) = &item
+ && let ItemKind::Static(ty, ..) = &item.kind
+ {
+ (item, false, ecx.with_def_site_ctxt(ty.span))
+ } else if let Annotatable::Stmt(stmt) = &item
+ && let StmtKind::Item(item) = &stmt.kind
+ && let ItemKind::Static(ty, ..) = &item.kind
+ {
+ (item, true, ecx.with_def_site_ctxt(ty.span))
+ } else {
+ ecx.sess.parse_sess.span_diagnostic.span_err(item.span(), "allocators must be statics");
+ return vec![orig_item];
+ };
// Generate a bunch of new items using the AllocFnFactory
let span = ecx.with_def_site_ctxt(item.span);