Rename resolve_type_vars_with_obligations to

resolve_vars_with_obligations, as it now also resolves const variables.

src/librustc_typeck/check/coercion.rs

@@ -811,7 +811,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         target: Ty<'tcx>,
         allow_two_phase: AllowTwoPhase,
     ) -> RelateResult<'tcx, Ty<'tcx>> {
-        let source = self.resolve_type_vars_with_obligations(expr_ty);
+        let source = self.resolve_vars_with_obligations(expr_ty);
         debug!("coercion::try({:?}: {:?} -> {:?})", expr, source, target);
 
         let cause = self.cause(expr.span, ObligationCauseCode::ExprAssignable);
@@ -829,7 +829,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
 
     /// Same as `try_coerce()`, but without side-effects.
     pub fn can_coerce(&self, expr_ty: Ty<'tcx>, target: Ty<'tcx>) -> bool {
-        let source = self.resolve_type_vars_with_obligations(expr_ty);
+        let source = self.resolve_vars_with_obligations(expr_ty);
         debug!("coercion::can({:?} -> {:?})", source, target);
 
         let cause = self.cause(syntax_pos::DUMMY_SP, ObligationCauseCode::ExprAssignable);
@@ -853,8 +853,8 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                                 -> RelateResult<'tcx, Ty<'tcx>>
         where E: AsCoercionSite
     {
-        let prev_ty = self.resolve_type_vars_with_obligations(prev_ty);
-        let new_ty = self.resolve_type_vars_with_obligations(new_ty);
+        let prev_ty = self.resolve_vars_with_obligations(prev_ty);
+        let new_ty = self.resolve_vars_with_obligations(new_ty);
         debug!("coercion::try_find_coercion_lub({:?}, {:?})", prev_ty, new_ty);
 
         // Special-case that coercion alone cannot handle:
@@ -1333,7 +1333,7 @@ impl<'tcx, 'exprs, E: AsCoercionSite> CoerceMany<'tcx, 'exprs, E> {
             err.span_label(return_sp, "expected because this return type...");
             err.span_label( *sp, format!(
                 "...is found to be `{}` here",
-                fcx.resolve_type_vars_with_obligations(expected),
+                fcx.resolve_vars_with_obligations(expected),
             ));
         }
         err

src/librustc_typeck/check/demand.rs

@@ -108,7 +108,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                               expected: Ty<'tcx>,
                               allow_two_phase: AllowTwoPhase)
                               -> (Ty<'tcx>, Option<DiagnosticBuilder<'tcx>>) {
-        let expected = self.resolve_type_vars_with_obligations(expected);
+        let expected = self.resolve_vars_with_obligations(expected);
 
         let e = match self.try_coerce(expr, checked_ty, expected, allow_two_phase) {
             Ok(ty) => return (ty, None),
@@ -117,7 +117,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
 
         let expr = expr.peel_drop_temps();
         let cause = self.misc(expr.span);
-        let expr_ty = self.resolve_type_vars_with_obligations(checked_ty);
+        let expr_ty = self.resolve_vars_with_obligations(checked_ty);
         let mut err = self.report_mismatched_types(&cause, expected, expr_ty, e);
 
         if self.is_assign_to_bool(expr, expected) {

src/librustc_typeck/check/expr.rs

@@ -1010,7 +1010,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         expr: &'tcx hir::Expr,
     ) -> Ty<'tcx> {
         let flds = expected.only_has_type(self).and_then(|ty| {
-            let ty = self.resolve_type_vars_with_obligations(ty);
+            let ty = self.resolve_vars_with_obligations(ty);
             match ty.kind {
                 ty::Tuple(ref flds) => Some(&flds[..]),
                 _ => None

src/librustc_typeck/check/method/suggest.rs

@@ -919,7 +919,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         // This occurs for UFCS desugaring of `T::method`, where there is no
         // receiver expression for the method call, and thus no autoderef.
         if let SelfSource::QPath(_) = source {
-            return is_local(self.resolve_type_vars_with_obligations(rcvr_ty));
+            return is_local(self.resolve_vars_with_obligations(rcvr_ty));
         }
 
         self.autoderef(span, rcvr_ty).any(|(ty, _)| is_local(ty))

src/librustc_typeck/check/mod.rs

@@ -2440,23 +2440,23 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         self.cause(span, ObligationCauseCode::MiscObligation)
     }
 
-    /// Resolves type variables in `ty` if possible. Unlike the infcx
+    /// Resolves type and const variables in `ty` if possible. Unlike the infcx
     /// version (resolve_vars_if_possible), this version will
     /// also select obligations if it seems useful, in an effort
     /// to get more type information.
-    fn resolve_type_vars_with_obligations(&self, mut ty: Ty<'tcx>) -> Ty<'tcx> {
-        debug!("resolve_type_vars_with_obligations(ty={:?})", ty);
+    fn resolve_vars_with_obligations(&self, mut ty: Ty<'tcx>) -> Ty<'tcx> {
+        debug!("resolve_vars_with_obligations(ty={:?})", ty);
 
         // No Infer()? Nothing needs doing.
         if !ty.has_infer_types() && !ty.has_infer_consts() {
-            debug!("resolve_type_vars_with_obligations: ty={:?}", ty);
+            debug!("resolve_vars_with_obligations: ty={:?}", ty);
             return ty;
         }
 
         // If `ty` is a type variable, see whether we already know what it is.
         ty = self.resolve_vars_if_possible(&ty);
         if !ty.has_infer_types() && !ty.has_infer_consts()  {
-            debug!("resolve_type_vars_with_obligations: ty={:?}", ty);
+            debug!("resolve_vars_with_obligations: ty={:?}", ty);
             return ty;
         }
 
@@ -2467,7 +2467,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         self.select_obligations_where_possible(false, |_| {});
         ty = self.resolve_vars_if_possible(&ty);
 
-        debug!("resolve_type_vars_with_obligations: ty={:?}", ty);
+        debug!("resolve_vars_with_obligations: ty={:?}", ty);
         ty
     }
 
@@ -3668,7 +3668,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                                            formal_ret: Ty<'tcx>,
                                            formal_args: &[Ty<'tcx>])
                                            -> Vec<Ty<'tcx>> {
-        let formal_ret = self.resolve_type_vars_with_obligations(formal_ret);
+        let formal_ret = self.resolve_vars_with_obligations(formal_ret);
         let ret_ty = match expected_ret.only_has_type(self) {
             Some(ret) => ret,
             None => return Vec::new()
@@ -4517,7 +4517,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 err.span_suggestion(
                     span,
                     "try adding a return type",
-                    format!("-> {} ", self.resolve_type_vars_with_obligations(found)),
+                    format!("-> {} ", self.resolve_vars_with_obligations(found)),
                     Applicability::MachineApplicable);
                 true
             }
@@ -4993,7 +4993,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
     // If no resolution is possible, then an error is reported.
     // Numeric inference variables may be left unresolved.
     pub fn structurally_resolved_type(&self, sp: Span, ty: Ty<'tcx>) -> Ty<'tcx> {
-        let ty = self.resolve_type_vars_with_obligations(ty);
+        let ty = self.resolve_vars_with_obligations(ty);
         if !ty.is_ty_var() {
             ty
         } else {

src/librustc_typeck/check/op.rs

@@ -179,7 +179,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
                 self.check_expr_with_needs(lhs_expr, Needs::MutPlace)
             }
         };
-        let lhs_ty = self.resolve_type_vars_with_obligations(lhs_ty);
+        let lhs_ty = self.resolve_vars_with_obligations(lhs_ty);
 
         // N.B., as we have not yet type-checked the RHS, we don't have the
         // type at hand. Make a variable to represent it. The whole reason
@@ -196,7 +196,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
 
         // see `NB` above
         let rhs_ty = self.check_expr_coercable_to_type(rhs_expr, rhs_ty_var);
-        let rhs_ty = self.resolve_type_vars_with_obligations(rhs_ty);
+        let rhs_ty = self.resolve_vars_with_obligations(rhs_ty);
 
         let return_ty = match result {
             Ok(method) => {

src/librustc_typeck/check/pat.rs

@@ -251,7 +251,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
         expected: Ty<'tcx>,
         mut def_bm: BindingMode,
     ) -> (Ty<'tcx>, BindingMode) {
-        let mut expected = self.resolve_type_vars_with_obligations(&expected);
+        let mut expected = self.resolve_vars_with_obligations(&expected);
 
         // Peel off as many `&` or `&mut` from the scrutinee type as possible. For example,
         // for `match &&&mut Some(5)` the loop runs three times, aborting when it reaches