38 lines
1.4 KiB
Rust
38 lines
1.4 KiB
Rust
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use crate::ty::query::QueryDescription;
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use crate::ty::query::queries;
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use crate::ty::TyCtxt;
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use crate::hir::def_id::CrateNum;
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use crate::dep_graph::SerializedDepNodeIndex;
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use std::borrow::Cow;
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// Each of these queries corresponds to a function pointer field in the
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// `Providers` struct for requesting a value of that type, and a method
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// on `tcx: TyCtxt` (and `tcx.at(span)`) for doing that request in a way
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// which memoizes and does dep-graph tracking, wrapping around the actual
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// `Providers` that the driver creates (using several `rustc_*` crates).
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//
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// The result type of each query must implement `Clone`, and additionally
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// `ty::query::values::Value`, which produces an appropriate placeholder
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// (error) value if the query resulted in a query cycle.
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// Queries marked with `fatal_cycle` do not need the latter implementation,
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// as they will raise an fatal error on query cycles instead.
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rustc_queries! {
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Other {
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/// Records the type of every item.
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query type_of(key: DefId) -> Ty<'tcx> {
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cache { key.is_local() }
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}
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query native_libraries(_: CrateNum) -> Lrc<Vec<NativeLibrary>> {
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desc { "looking up the native libraries of a linked crate" }
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}
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}
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Codegen {
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query is_panic_runtime(_: CrateNum) -> bool {
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fatal_cycle
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desc { "checking if the crate is_panic_runtime" }
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}
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}
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}
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