Rollup merge of rust-lang#94097 - pierwill:doc-rustc-middle-query, r=…

…cjgillot Add module-level docs for `rustc_middle::query`
matthiaskrgr · Feb 19, 2022 · 9f218e6 · 9f218e6
2 parents 79c4c1e + 5cf8274
commit 9f218e6
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/compiler/rustc_middle/src/query/mod.rs b/compiler/rustc_middle/src/query/mod.rs
@@ -1,3 +1,9 @@
+//! Defines the various compiler queries.
+//!
+//! For more information on the query system, see
+//! ["Queries: demand-driven compilation"](https://rustc-dev-guide.rust-lang.org/query.html).
+//! This chapter includes instructions for adding new queries.
+
 // Each of these queries corresponds to a function pointer field in the
 // `Providers` struct for requesting a value of that type, and a method
 // on `tcx: TyCtxt` (and `tcx.at(span)`) for doing that request in a way