Querify

src/librustc/dep_graph/dep_node.rs

@@ -516,6 +516,7 @@ define_dep_nodes!( <'tcx>
     [] UsedTraitImports(DefId),
     [] HasTypeckTables(DefId),
     [] ConstEval { param_env: ParamEnvAnd<'tcx, (DefId, &'tcx Substs<'tcx>)> },
+    [] CheckMatch(DefId),
     [] SymbolName(DefId),
     [] InstanceSymbolName { instance: Instance<'tcx> },
     [] SpecializationGraph(DefId),

src/librustc/ty/maps/mod.rs

@@ -37,7 +37,7 @@ use ty::{self, CrateInherentImpls, Ty, TyCtxt};
 use ty::steal::Steal;
 use ty::subst::Substs;
 use util::nodemap::{DefIdSet, DefIdMap, ItemLocalSet};
-use util::common::{profq_msg, ProfileQueriesMsg};
+use util::common::{profq_msg, ErrorReported, ProfileQueriesMsg};
 
 use rustc_data_structures::indexed_set::IdxSetBuf;
 use rustc_back::PanicStrategy;
@@ -205,6 +205,9 @@ define_maps! { <'tcx>
     [] fn const_eval: const_eval_dep_node(ty::ParamEnvAnd<'tcx, (DefId, &'tcx Substs<'tcx>)>)
         -> const_val::EvalResult<'tcx>,
 
+    [] fn check_match: CheckMatch(DefId)
+        -> Result<(), ErrorReported>,
+
     /// Performs the privacy check and computes "access levels".
     [] fn privacy_access_levels: PrivacyAccessLevels(CrateNum) -> Rc<AccessLevels>,
 

src/librustc/ty/maps/plumbing.rs

@@ -800,6 +800,7 @@ pub fn force_from_dep_node<'a, 'gcx, 'lcx>(tcx: TyCtxt<'a, 'gcx, 'lcx>,
         DepKind::SpecializationGraph => { force!(specialization_graph_of, def_id!()); }
         DepKind::ObjectSafety => { force!(is_object_safe, def_id!()); }
         DepKind::TraitImpls => { force!(trait_impls_of, def_id!()); }
+        DepKind::CheckMatch => { force!(check_match, def_id!()); }
 
         DepKind::ParamEnv => { force!(param_env, def_id!()); }
         DepKind::DescribeDef => { force!(describe_def, def_id!()); }

src/librustc_const_eval/check_match.rs

@@ -24,6 +24,7 @@ use rustc::ty::{self, Ty, TyCtxt};
 use rustc::ty::subst::Substs;
 use rustc::lint;
 use rustc_errors::DiagnosticBuilder;
+use rustc::util::common::ErrorReported;
 
 use rustc::hir::def::*;
 use rustc::hir::def_id::DefId;
@@ -47,17 +48,14 @@ impl<'a, 'tcx> Visitor<'tcx> for OuterVisitor<'a, 'tcx> {
                 b: hir::BodyId, s: Span, id: ast::NodeId) {
         intravisit::walk_fn(self, fk, fd, b, s, id);
 
-        let def_id = self.tcx.hir.local_def_id(id);
-
-        check_body(self.tcx, def_id, b);
+        check_body(self.tcx, b);
     }
 
     fn visit_item(&mut self, item: &'tcx hir::Item) {
         intravisit::walk_item(self, item);
         match item.node {
             hir::ItemStatic(.., body_id) | hir::ItemConst(.., body_id) => {
-                let def_id = self.tcx.hir.local_def_id(item.id);
-                check_body(self.tcx, def_id, body_id);
+                check_body(self.tcx, body_id);
             }
             _ => (),
         }
@@ -66,16 +64,14 @@ impl<'a, 'tcx> Visitor<'tcx> for OuterVisitor<'a, 'tcx> {
     fn visit_impl_item(&mut self, ii: &'tcx hir::ImplItem) {
         intravisit::walk_impl_item(self, ii);
         if let hir::ImplItemKind::Const(_, body_id) = ii.node {
-            let def_id = self.tcx.hir.local_def_id(ii.id);
-            check_body(self.tcx, def_id, body_id);
+            check_body(self.tcx, body_id);
         }
     }
 
     fn visit_trait_item(&mut self, ti: &'tcx hir::TraitItem) {
         intravisit::walk_trait_item(self, ti);
         if let hir::TraitItemKind::Const(_, Some(body_id)) = ti.node {
-            let def_id = self.tcx.hir.local_def_id(ti.id);
-            check_body(self.tcx, def_id, body_id);
+            check_body(self.tcx, body_id);
         }
     }
 
@@ -83,16 +79,30 @@ impl<'a, 'tcx> Visitor<'tcx> for OuterVisitor<'a, 'tcx> {
     // but they are const-evaluated during typeck.
 }
 
+fn check_body<'a, 'tcx>(
+    tcx: TyCtxt<'a, 'tcx, 'tcx>,
+    body_id: hir::BodyId,
+) {
+    let def_id = tcx.hir.body_owner_def_id(body_id);
+    let _ = tcx.check_match(def_id);
+}
+
 pub fn check_crate<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>) {
     tcx.hir.krate().visit_all_item_likes(&mut OuterVisitor { tcx: tcx }.as_deep_visitor());
     tcx.sess.abort_if_errors();
 }
 
-pub(crate) fn check_body<'a, 'tcx>(
+pub(crate) fn check_match<'a, 'tcx>(
     tcx: TyCtxt<'a, 'tcx, 'tcx>,
     def_id: DefId,
-    body_id: hir::BodyId,
-) {
+) -> Result<(), ErrorReported> {
+    let body_id = if let Some(id) = tcx.hir.as_local_node_id(def_id) {
+        tcx.hir.body_owned_by(id)
+    } else {
+        return Ok(());
+    };
+
+    tcx.sess.track_errors(|| {
         MatchVisitor {
             tcx,
             tables: tcx.body_tables(body_id),
@@ -100,6 +110,7 @@ pub(crate) fn check_body<'a, 'tcx>(
             param_env: tcx.param_env(def_id),
             identity_substs: Substs::identity_for_item(tcx, def_id),
         }.visit_body(tcx.hir.body(body_id));
+    })
 }
 
 fn create_e0004<'a>(sess: &'a Session, sp: Span, error_message: String) -> DiagnosticBuilder<'a> {

src/librustc_const_eval/eval.rs

@@ -18,7 +18,6 @@ use rustc::hir::def::{Def, CtorKind};
 use rustc::hir::def_id::DefId;
 use rustc::ty::{self, Ty, TyCtxt};
 use rustc::ty::layout::LayoutOf;
-use rustc::ty::maps::Providers;
 use rustc::ty::util::IntTypeExt;
 use rustc::ty::subst::{Substs, Subst};
 use rustc::util::common::ErrorReported;
@@ -684,14 +683,7 @@ impl<'a, 'tcx> ConstContext<'a, 'tcx> {
     }
 }
 
-pub fn provide(providers: &mut Providers) {
-    *providers = Providers {
-        const_eval,
-        ..*providers
-    };
-}
-
-fn const_eval<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
+pub(crate) fn const_eval<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
                         key: ty::ParamEnvAnd<'tcx, (DefId, &'tcx Substs<'tcx>)>)
                         -> EvalResult<'tcx> {
     let (def_id, substs) = if let Some(resolved) = lookup_const_by_id(tcx, key) {
@@ -708,14 +700,12 @@ fn const_eval<'a, 'tcx>(tcx: TyCtxt<'a, 'tcx, 'tcx>,
         let body_id = tcx.hir.body_owned_by(id);
 
         // Do match-check before building MIR
-        tcx.sess
-            .track_errors(|| super::check_match::check_body(tcx, def_id, body_id))
-            .map_err(|_| {
-                ConstEvalErr {
+        if tcx.check_match(def_id).is_err() {
+            return Err(ConstEvalErr {
                 span: tcx.def_span(key.value.0),
                 kind: MatchCheckError,
+            });
         }
-            })?;
 
         tcx.mir_const_qualif(def_id);
         tcx.hir.body(body_id)

src/librustc_const_eval/lib.rs

@@ -48,5 +48,15 @@ pub mod pattern;
 
 pub use eval::*;
 
+use rustc::ty::maps::Providers;
+
+pub fn provide(providers: &mut Providers) {
+    *providers = Providers {
+        const_eval: eval::const_eval,
+        check_match: check_match::check_match,
+        ..*providers
+    };
+}
+
 // Build the diagnostics array at the end so that the metadata includes error use sites.
 __build_diagnostic_array! { librustc_const_eval, DIAGNOSTICS }