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rustc_interface: Add a new query pre_configure

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It partially expands crate attributes before the main expansion pass (without modifying the crate), and the produced preliminary crate attribute list is used for querying a few attributes that are required very early.

Crate-level cfg attributes are then expanded normally during the main expansion pass, like attributes on any other nodes.
This commit is contained in:
Vadim Petrochenkov 2023-03-14 16:53:04 +04:00
parent f26da39e04
commit aca1b1e0b3
12 changed files with 108 additions and 84 deletions
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4
compiler/rustc_resolve/src/macros.rs
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@ -112,8 +112,8 @@ fn fast_print_path(path: &ast::Path) -> Symbol {
pub(crate) fn registered_tools(tcx: TyCtxt<'_>, (): ()) -> RegisteredTools {
let mut registered_tools = RegisteredTools::default();
let krate = tcx.crate_for_resolver(()).borrow();
for attr in attr::filter_by_name(&krate.attrs, sym::register_tool) {
let (_, pre_configured_attrs) = &*tcx.crate_for_resolver(()).borrow();
for attr in attr::filter_by_name(pre_configured_attrs, sym::register_tool) {
for nested_meta in attr.meta_item_list().unwrap_or_default() {
match nested_meta.ident() {
Some(ident) => {