diff options
Diffstat (limited to 'compiler/rustc_middle/src/hooks/mod.rs')
| -rw-r--r-- | compiler/rustc_middle/src/hooks/mod.rs | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/compiler/rustc_middle/src/hooks/mod.rs b/compiler/rustc_middle/src/hooks/mod.rs index 12aeae177..8588ae203 100644 --- a/compiler/rustc_middle/src/hooks/mod.rs +++ b/compiler/rustc_middle/src/hooks/mod.rs @@ -1,3 +1,8 @@ +//! "Hooks" provide a way for `tcx` functionality to be provided by some downstream crate without +//! everything in rustc having to depend on that crate. This is somewhat similar to queries, but +//! queries come with a lot of machinery for caching and incremental compilation, whereas hooks are +//! just plain function pointers without any of the query magic. + use crate::mir; use crate::query::TyCtxtAt; use crate::ty::{Ty, TyCtxt}; @@ -61,5 +66,8 @@ macro_rules! declare_hooks { declare_hooks! { /// Tries to destructure an `mir::Const` ADT or array into its variant index /// and its field values. This should only be used for pretty printing. - hook try_destructure_mir_constant_for_diagnostics(val: mir::ConstValue<'tcx>, ty: Ty<'tcx>) -> Option<mir::DestructuredConstant<'tcx>>; + hook try_destructure_mir_constant_for_user_output(val: mir::ConstValue<'tcx>, ty: Ty<'tcx>) -> Option<mir::DestructuredConstant<'tcx>>; + + /// Getting a &core::panic::Location referring to a span. + hook const_caller_location(file: rustc_span::Symbol, line: u32, col: u32) -> mir::ConstValue<'tcx>; } |