compiler/rustc_query_system/src/ich/impls_hir.rs


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//! This module contains `HashStable` implementations for various HIR data
//! types in no particular order.

use crate::ich::hcx::BodyResolver;
use crate::ich::StableHashingContext;
use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
use rustc_hir as hir;

impl<'ctx> rustc_hir::HashStableContext for StableHashingContext<'ctx> {
    #[inline]
    fn hash_body_id(&mut self, id: hir::BodyId, hasher: &mut StableHasher) {
        let hcx = self;
        match hcx.body_resolver {
            BodyResolver::Forbidden => panic!("Hashing HIR bodies is forbidden."),
            BodyResolver::Ignore => {}
            BodyResolver::Traverse { owner, bodies } => {
                assert_eq!(id.hir_id.owner, owner);
                bodies[&id.hir_id.local_id].hash_stable(hcx, hasher);
            }
        }
    }
}