rustc: move Debug impls from ppaux to ty::structural_impls.

src/librustc/ty/structural_impls.rs

@@ -3,17 +3,287 @@
 //! hand, though we've recently added some macros (e.g.,
 //! `BraceStructLiftImpl!`) to help with the tedium.
 
+use crate::hir::def::Namespace;
 use crate::mir::ProjectionKind;
 use crate::mir::interpret::ConstValue;
 use crate::ty::{self, Lift, Ty, TyCtxt, ConstVid, InferConst};
 use crate::ty::fold::{TypeFoldable, TypeFolder, TypeVisitor};
+use crate::ty::print::{FmtPrinter, PrintCx, Printer};
 use rustc_data_structures::indexed_vec::{IndexVec, Idx};
 use smallvec::SmallVec;
 use crate::mir::interpret;
 
+use std::fmt;
+use std::iter;
 use std::marker::PhantomData;
 use std::rc::Rc;
 
+impl fmt::Debug for ty::GenericParamDef {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let type_name = match self.kind {
+            ty::GenericParamDefKind::Lifetime => "Lifetime",
+            ty::GenericParamDefKind::Type {..} => "Type",
+            ty::GenericParamDefKind::Const => "Const",
+        };
+        write!(f, "{}({}, {:?}, {})",
+               type_name,
+               self.name,
+               self.def_id,
+               self.index)
+    }
+}
+
+impl fmt::Debug for ty::TraitDef {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        PrintCx::with_tls_tcx(FmtPrinter::new(f, Namespace::TypeNS), |cx| {
+            cx.print_def_path(self.def_id, None, iter::empty())?;
+            Ok(())
+        })
+    }
+}
+
+impl fmt::Debug for ty::AdtDef {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        PrintCx::with_tls_tcx(FmtPrinter::new(f, Namespace::TypeNS), |cx| {
+            cx.print_def_path(self.did, None, iter::empty())?;
+            Ok(())
+        })
+    }
+}
+
+impl fmt::Debug for ty::ClosureUpvar<'tcx> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "ClosureUpvar({:?},{:?})",
+               self.def,
+               self.ty)
+    }
+}
+
+impl fmt::Debug for ty::UpvarId {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let name = ty::tls::with(|tcx| {
+            tcx.hir().name_by_hir_id(self.var_path.hir_id)
+        });
+        write!(f, "UpvarId({:?};`{}`;{:?})",
+            self.var_path.hir_id,
+            name,
+            self.closure_expr_id)
+    }
+}
+
+impl fmt::Debug for ty::UpvarBorrow<'tcx> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "UpvarBorrow({:?}, {:?})",
+               self.kind, self.region)
+    }
+}
+
+impl fmt::Debug for ty::ExistentialTraitRef<'tcx> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        fmt::Display::fmt(self, f)
+    }
+}
+
+impl fmt::Debug for ty::adjustment::Adjustment<'tcx> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{:?} -> {}", self.kind, self.target)
+    }
+}
+
+impl fmt::Debug for ty::BoundRegion {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match *self {
+            ty::BrAnon(n) => write!(f, "BrAnon({:?})", n),
+            ty::BrFresh(n) => write!(f, "BrFresh({:?})", n),
+            ty::BrNamed(did, name) => {
+                write!(f, "BrNamed({:?}:{:?}, {})",
+                        did.krate, did.index, name)
+            }
+            ty::BrEnv => write!(f, "BrEnv"),
+        }
+    }
+}
+
+impl fmt::Debug for ty::RegionKind {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match *self {
+            ty::ReEarlyBound(ref data) => {
+                write!(f, "ReEarlyBound({}, {})",
+                        data.index,
+                        data.name)
+            }
+
+            ty::ReClosureBound(ref vid) => {
+                write!(f, "ReClosureBound({:?})", vid)
+            }
+
+            ty::ReLateBound(binder_id, ref bound_region) => {
+                write!(f, "ReLateBound({:?}, {:?})", binder_id, bound_region)
+            }
+
+            ty::ReFree(ref fr) => fr.fmt(f),
+
+            ty::ReScope(id) => write!(f, "ReScope({:?})", id),
+
+            ty::ReStatic => write!(f, "ReStatic"),
+
+            ty::ReVar(ref vid) => vid.fmt(f),
+
+            ty::RePlaceholder(placeholder) => {
+                write!(f, "RePlaceholder({:?})", placeholder)
+            }
+
+            ty::ReEmpty => write!(f, "ReEmpty"),
+
+            ty::ReErased => write!(f, "ReErased"),
+        }
+    }
+}
+
+impl fmt::Debug for ty::FreeRegion {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "ReFree({:?}, {:?})", self.scope, self.bound_region)
+    }
+}
+
+impl fmt::Debug for ty::Variance {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.write_str(match *self {
+            ty::Covariant => "+",
+            ty::Contravariant => "-",
+            ty::Invariant => "o",
+            ty::Bivariant => "*",
+        })
+    }
+}
+
+impl fmt::Debug for ty::FnSig<'tcx> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "({:?}; c_variadic: {})->{:?}",
+                self.inputs(), self.c_variadic, self.output())
+    }
+}
+
+impl fmt::Debug for ty::TyVid {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "_#{}t", self.index)
+    }
+}
+
+impl<'tcx> fmt::Debug for ty::ConstVid<'tcx> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "_#{}c", self.index)
+    }
+}
+
+impl fmt::Debug for ty::IntVid {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "_#{}i", self.index)
+    }
+}
+
+impl fmt::Debug for ty::FloatVid {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "_#{}f", self.index)
+    }
+}
+
+impl fmt::Debug for ty::RegionVid {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "'_#{}r", self.index())
+    }
+}
+
+impl fmt::Debug for ty::InferTy {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match *self {
+            ty::TyVar(ref v) => v.fmt(f),
+            ty::IntVar(ref v) => v.fmt(f),
+            ty::FloatVar(ref v) => v.fmt(f),
+            ty::FreshTy(v) => write!(f, "FreshTy({:?})", v),
+            ty::FreshIntTy(v) => write!(f, "FreshIntTy({:?})", v),
+            ty::FreshFloatTy(v) => write!(f, "FreshFloatTy({:?})", v),
+        }
+    }
+}
+
+impl fmt::Debug for ty::IntVarValue {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match *self {
+            ty::IntType(ref v) => v.fmt(f),
+            ty::UintType(ref v) => v.fmt(f),
+        }
+    }
+}
+
+impl fmt::Debug for ty::FloatVarValue {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        self.0.fmt(f)
+    }
+}
+
+impl fmt::Debug for ty::TraitRef<'tcx> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        // HACK(eddyb) this is used across the compiler to print
+        // a `TraitRef` qualified (with the Self type explicit),
+        // instead of having a different way to make that choice.
+        write!(f, "<{} as {}>", self.self_ty(), self)
+    }
+}
+
+impl fmt::Debug for Ty<'tcx> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        fmt::Display::fmt(self, f)
+    }
+}
+
+impl fmt::Debug for ty::ParamTy {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}/#{}", self.name, self.idx)
+    }
+}
+
+impl fmt::Debug for ty::ParamConst {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}/#{}", self.name, self.index)
+    }
+}
+
+impl fmt::Debug for ty::TraitPredicate<'tcx> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "TraitPredicate({:?})", self.trait_ref)
+    }
+}
+
+impl fmt::Debug for ty::ProjectionPredicate<'tcx> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "ProjectionPredicate({:?}, {:?})", self.projection_ty, self.ty)
+    }
+}
+
+impl fmt::Debug for ty::Predicate<'tcx> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match *self {
+            ty::Predicate::Trait(ref a) => a.fmt(f),
+            ty::Predicate::Subtype(ref pair) => pair.fmt(f),
+            ty::Predicate::RegionOutlives(ref pair) => pair.fmt(f),
+            ty::Predicate::TypeOutlives(ref pair) => pair.fmt(f),
+            ty::Predicate::Projection(ref pair) => pair.fmt(f),
+            ty::Predicate::WellFormed(ty) => write!(f, "WellFormed({:?})", ty),
+            ty::Predicate::ObjectSafe(trait_def_id) => {
+                write!(f, "ObjectSafe({:?})", trait_def_id)
+            }
+            ty::Predicate::ClosureKind(closure_def_id, closure_substs, kind) => {
+                write!(f, "ClosureKind({:?}, {:?}, {:?})",
+                    closure_def_id, closure_substs, kind)
+            }
+            ty::Predicate::ConstEvaluatable(def_id, substs) => {
+                write!(f, "ConstEvaluatable({:?}, {:?})", def_id, substs)
+            }
+        }
+    }
+}
+
 ///////////////////////////////////////////////////////////////////////////
 // Atomic structs
 //

src/librustc/ty/subst.rs

@@ -12,6 +12,7 @@
 use rustc_macros::HashStable;
 
 use core::intrinsics;
+use std::fmt;
 use std::cmp::Ordering;
 use std::marker::PhantomData;
 use std::mem;
@@ -69,6 +70,16 @@ fn pack(self) -> Kind<'tcx> {
     }
 }
 
+impl fmt::Debug for Kind<'tcx> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self.unpack() {
+            UnpackedKind::Lifetime(lt) => lt.fmt(f),
+            UnpackedKind::Type(ty) => ty.fmt(f),
+            UnpackedKind::Const(ct) => ct.fmt(f),
+        }
+    }
+}
+
 impl<'tcx> Ord for Kind<'tcx> {
     fn cmp(&self, other: &Kind<'_>) -> Ordering {
         self.unpack().cmp(&other.unpack())

src/librustc/util/ppaux.rs

@@ -2,16 +2,20 @@
 use crate::hir::def::Namespace;
 use crate::ty::subst::{Kind, UnpackedKind};
 use crate::ty::{self, ParamConst, Ty};
-use crate::ty::print::{FmtPrinter, PrettyPrinter, PrintCx, Print, Printer};
+use crate::ty::print::{FmtPrinter, PrettyPrinter, PrintCx, Print};
 use crate::mir::interpret::ConstValue;
 
-use std::fmt::{self, Write as _};
+use std::fmt;
 use std::iter;
 
 use rustc_target::spec::abi::Abi;
 
 macro_rules! define_print {
-    (@display $target:ty, ($self:ident, $cx:ident) $disp:block) => {
+    ([$($target:ty),+] $vars:tt $def:tt) => {
+        $(define_print!($target, $vars $def);)+
+    };
+
+    ($target:ty, ($self:ident, $cx:ident) { display $disp:block }) => {
         impl<P: PrettyPrinter> Print<'tcx, P> for $target {
             type Output = P;
             type Error = fmt::Error;
@@ -34,38 +38,6 @@ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
             }
         }
     };
-
-    (@debug $target:ty, ($self:ident, $cx:ident) $dbg:block) => {
-        impl fmt::Debug for $target {
-            fn fmt(&$self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-                PrintCx::with_tls_tcx(FmtPrinter::new(f, Namespace::TypeNS), |$cx| {
-                    #[allow(unused_mut)]
-                    let mut $cx = $cx;
-                    define_scoped_cx!($cx);
-                    let _: () = $dbg;
-                    let _ = $cx;
-                    Ok(())
-                })
-            }
-        }
-    };
-
-    ([$($target:ty),+] $vars:tt $def:tt) => {
-        $(define_print!($target, $vars $def);)+
-    };
-
-    ($target:ty, $vars:tt {
-        display $disp:block
-        debug $dbg:block
-    }) => {
-        define_print!(@display $target, $vars $disp);
-        define_print!(@debug $target, $vars $dbg);
-    };
-    ($target:ty, $vars:tt {
-        display $disp:block
-    }) => {
-        define_print!(@display $target, $vars $disp);
-    };
 }
 
 macro_rules! nest {
@@ -160,67 +132,6 @@ fn fmt(&$self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
     }
 }
 
-impl fmt::Debug for ty::GenericParamDef {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        let type_name = match self.kind {
-            ty::GenericParamDefKind::Lifetime => "Lifetime",
-            ty::GenericParamDefKind::Type { .. } => "Type",
-            ty::GenericParamDefKind::Const => "Const",
-        };
-        write!(f, "{}({}, {:?}, {})",
-               type_name,
-               self.name,
-               self.def_id,
-               self.index)
-    }
-}
-
-impl fmt::Debug for ty::TraitDef {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        PrintCx::with_tls_tcx(FmtPrinter::new(f, Namespace::TypeNS), |cx| {
-            cx.print_def_path(self.def_id, None, iter::empty())?;
-            Ok(())
-        })
-    }
-}
-
-impl fmt::Debug for ty::AdtDef {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        PrintCx::with_tls_tcx(FmtPrinter::new(f, Namespace::TypeNS), |cx| {
-            cx.print_def_path(self.did, None, iter::empty())?;
-            Ok(())
-        })
-    }
-}
-
-impl<'tcx> fmt::Debug for ty::ClosureUpvar<'tcx> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "ClosureUpvar({:?},{:?})",
-               self.def,
-               self.ty)
-    }
-}
-
-impl fmt::Debug for ty::UpvarId {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        PrintCx::with_tls_tcx(FmtPrinter::new(f, Namespace::ValueNS), |mut cx| {
-            define_scoped_cx!(cx);
-            p!(write("UpvarId({:?};`{}`;{:?})",
-                self.var_path.hir_id,
-                cx.tcx.hir().name_by_hir_id(self.var_path.hir_id),
-                self.closure_expr_id));
-            Ok(())
-        })
-    }
-}
-
-impl<'tcx> fmt::Debug for ty::UpvarBorrow<'tcx> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "UpvarBorrow({:?}, {:?})",
-               self.kind, self.region)
-    }
-}
-
 define_print! {
     &'tcx ty::List<Ty<'tcx>>, (self, cx) {
         display {
@@ -260,91 +171,11 @@ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
     }
 }
 
-impl fmt::Debug for ty::ExistentialTraitRef<'tcx> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        fmt::Display::fmt(self, f)
-    }
-}
-
-impl fmt::Debug for ty::adjustment::Adjustment<'tcx> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "{:?} -> {}", self.kind, self.target)
-    }
-}
-
-impl fmt::Debug for ty::BoundRegion {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        match *self {
-            ty::BrAnon(n) => write!(f, "BrAnon({:?})", n),
-            ty::BrFresh(n) => write!(f, "BrFresh({:?})", n),
-            ty::BrNamed(did, name) => {
-                write!(f, "BrNamed({:?}:{:?}, {})",
-                        did.krate, did.index, name)
-            }
-            ty::BrEnv => write!(f, "BrEnv"),
-        }
-    }
-}
-
 define_print! {
     ty::RegionKind, (self, cx) {
         display {
             return cx.print_region(self);
         }
-        debug {
-            match *self {
-                ty::ReEarlyBound(ref data) => {
-                    p!(write("ReEarlyBound({}, {})",
-                           data.index,
-                           data.name))
-                }
-
-                ty::ReClosureBound(ref vid) => {
-                    p!(write("ReClosureBound({:?})", vid))
-                }
-
-                ty::ReLateBound(binder_id, ref bound_region) => {
-                    p!(write("ReLateBound({:?}, {:?})", binder_id, bound_region))
-                }
-
-                ty::ReFree(ref fr) => p!(write("{:?}", fr)),
-
-                ty::ReScope(id) => {
-                    p!(write("ReScope({:?})", id))
-                }
-
-                ty::ReStatic => p!(write("ReStatic")),
-
-                ty::ReVar(ref vid) => {
-                    p!(write("{:?}", vid));
-                }
-
-                ty::RePlaceholder(placeholder) => {
-                    p!(write("RePlaceholder({:?})", placeholder))
-                }
-
-                ty::ReEmpty => p!(write("ReEmpty")),
-
-                ty::ReErased => p!(write("ReErased"))
-            }
-        }
-    }
-}
-
-impl fmt::Debug for ty::FreeRegion {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "ReFree({:?}, {:?})", self.scope, self.bound_region)
-    }
-}
-
-impl fmt::Debug for ty::Variance {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        f.write_str(match *self {
-            ty::Covariant => "+",
-            ty::Contravariant => "-",
-            ty::Invariant => "o",
-            ty::Bivariant => "*",
-        })
     }
 }
 
@@ -362,40 +193,6 @@ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
             p!(write("fn"));
             nest!(|cx| cx.pretty_fn_sig(self.inputs(), self.c_variadic, self.output()));
         }
-        debug {
-            p!(write("({:?}; c_variadic: {})->{:?}",
-                self.inputs(), self.c_variadic, self.output()))
-        }
-    }
-}
-
-impl fmt::Debug for ty::TyVid {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "_#{}t", self.index)
-    }
-}
-
-impl<'tcx> fmt::Debug for ty::ConstVid<'tcx> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "_#{}f", self.index)
-    }
-}
-
-impl fmt::Debug for ty::IntVid {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "_#{}i", self.index)
-    }
-}
-
-impl fmt::Debug for ty::FloatVid {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "_#{}f", self.index)
-    }
-}
-
-impl fmt::Debug for ty::RegionVid {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "'_#{}r", self.index())
     }
 }
 
@@ -415,31 +212,6 @@ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
                 ty::FreshFloatTy(v) => p!(write("FreshFloatTy({})", v))
             }
         }
-        debug {
-            match *self {
-                ty::TyVar(ref v) => p!(write("{:?}", v)),
-                ty::IntVar(ref v) => p!(write("{:?}", v)),
-                ty::FloatVar(ref v) => p!(write("{:?}", v)),
-                ty::FreshTy(v) => p!(write("FreshTy({:?})", v)),
-                ty::FreshIntTy(v) => p!(write("FreshIntTy({:?})", v)),
-                ty::FreshFloatTy(v) => p!(write("FreshFloatTy({:?})", v))
-            }
-        }
-    }
-}
-
-impl fmt::Debug for ty::IntVarValue {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        match *self {
-            ty::IntType(ref v) => v.fmt(f),
-            ty::UintType(ref v) => v.fmt(f),
-        }
-    }
-}
-
-impl fmt::Debug for ty::FloatVarValue {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        self.0.fmt(f)
     }
 }
 
@@ -478,12 +250,6 @@ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         display {
             nest!(|cx| cx.print_def_path(self.def_id, Some(self.substs), iter::empty()));
         }
-        debug {
-            // HACK(eddyb) this is used across the compiler to print
-            // a `TraitRef` qualified (with the Self type explicit),
-            // instead of having a different way to make that choice.
-            p!(write("<{} as {}>", self.self_ty(), self))
-        }
     }
 }
 
@@ -495,12 +261,6 @@ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
     }
 }
 
-impl fmt::Debug for Ty<'tcx> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        fmt::Display::fmt(self, f)
-    }
-}
-
 define_print! {
     ConstValue<'tcx>, (self, cx) {
         display {
@@ -538,9 +298,6 @@ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         display {
             p!(write("{}", self.name))
         }
-        debug {
-            p!(write("{}/#{}", self.name, self.idx))
-        }
     }
 }
 
@@ -549,9 +306,6 @@ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         display {
             p!(write("{}", self.name))
         }
-        debug {
-            p!(write("{}/#{}", self.name, self.index))
-        }
     }
 }
 
@@ -581,10 +335,6 @@ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         display {
             p!(print(self.trait_ref.self_ty()), write(": "), print(self.trait_ref))
         }
-        debug {
-            p!(write("TraitPredicate({:?})",
-                   self.trait_ref))
-        }
     }
 }
 
@@ -593,9 +343,6 @@ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         display {
             p!(print(self.projection_ty), write(" == "), print(self.ty))
         }
-        debug {
-            p!(write("ProjectionPredicate({:?}, {:?})", self.projection_ty, self.ty))
-        }
     }
 }
 
@@ -646,26 +393,6 @@ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
                 }
             }
         }
-        debug {
-            match *self {
-                ty::Predicate::Trait(ref a) => p!(write("{:?}", a)),
-                ty::Predicate::Subtype(ref pair) => p!(write("{:?}", pair)),
-                ty::Predicate::RegionOutlives(ref pair) => p!(write("{:?}", pair)),
-                ty::Predicate::TypeOutlives(ref pair) => p!(write("{:?}", pair)),
-                ty::Predicate::Projection(ref pair) => p!(write("{:?}", pair)),
-                ty::Predicate::WellFormed(ty) => p!(write("WellFormed({:?})", ty)),
-                ty::Predicate::ObjectSafe(trait_def_id) => {
-                    p!(write("ObjectSafe({:?})", trait_def_id))
-                }
-                ty::Predicate::ClosureKind(closure_def_id, closure_substs, kind) => {
-                    p!(write("ClosureKind({:?}, {:?}, {:?})",
-                        closure_def_id, closure_substs, kind))
-                }
-                ty::Predicate::ConstEvaluatable(def_id, substs) => {
-                    p!(write("ConstEvaluatable({:?}, {:?})", def_id, substs))
-                }
-            }
-        }
     }
 }
 
@@ -678,12 +405,5 @@ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
                 UnpackedKind::Const(ct) => p!(print(ct)),
             }
         }
-        debug {
-            match self.unpack() {
-                UnpackedKind::Lifetime(lt) => p!(write("{:?}", lt)),
-                UnpackedKind::Type(ty) => p!(write("{:?}", ty)),
-                UnpackedKind::Const(ct) => p!(write("{:?}", ct)),
-            }
-        }
     }
 }