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Tshepang Mbambo 2025-06-14 22:16:51 +02:00
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src/query.md
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@ -2,7 +2,7 @@
<!-- toc --> <!-- toc -->
As described in [the high-level overview of the compiler][hl], the Rust compiler As described in [Overview of the compiler], the Rust compiler
is still (as of <!-- date-check --> July 2021) transitioning from a is still (as of <!-- date-check --> July 2021) transitioning from a
traditional "pass-based" setup to a "demand-driven" system. The compiler query traditional "pass-based" setup to a "demand-driven" system. The compiler query
system is the key to rustc's demand-driven organization. system is the key to rustc's demand-driven organization.
@ -13,7 +13,7 @@ there is a query called `type_of` that, given the [`DefId`] of
some item, will compute the type of that item and return it to you. some item, will compute the type of that item and return it to you.
[`DefId`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_span/def_id/struct.DefId.html [`DefId`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_span/def_id/struct.DefId.html
[hl]: ./compiler-src.md [Overview of the compiler]: overview.md#queries
Query execution is *memoized*. The first time you invoke a Query execution is *memoized*. The first time you invoke a
query, it will go do the computation, but the next time, the result is query, it will go do the computation, but the next time, the result is