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Pretty print quantified goals and clauses
This commit is contained in:
parent
64aac8d4c1
commit
eacebf24b0
@ -14,9 +14,11 @@ use traits;
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use traits::project::Normalized;
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use ty::fold::{TypeFoldable, TypeFolder, TypeVisitor};
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use ty::{self, Lift, TyCtxt};
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use syntax::symbol::InternedString;
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use std::fmt;
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use std::rc::Rc;
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use std::collections::{BTreeSet, BTreeMap};
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// structural impls for the structs in traits
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@ -479,7 +481,12 @@ impl<'tcx> fmt::Display for traits::DomainGoal<'tcx> {
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Holds(wc) => write!(fmt, "{}", wc),
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WellFormed(wf) => write!(fmt, "{}", wf),
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FromEnv(from_env) => write!(fmt, "{}", from_env),
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Normalize(projection) => write!(fmt, "Normalize({})", projection),
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Normalize(projection) => write!(
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fmt,
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"Normalize({} -> {})",
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projection.projection_ty,
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projection.ty
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),
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}
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}
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}
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@ -495,6 +502,110 @@ impl fmt::Display for traits::QuantifierKind {
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}
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}
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/// Collect names for regions / types bound by a quantified goal / clause.
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/// This collector does not try to do anything clever like in ppaux, it's just used
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/// for debug output in tests anyway.
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struct BoundNamesCollector {
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// Just sort by name because `BoundRegion::BrNamed` does not have a `BoundVar` index anyway.
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regions: BTreeSet<InternedString>,
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// Sort by `BoundVar` index, so usually this should be equivalent to the order given
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// by the list of type parameters.
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types: BTreeMap<u32, InternedString>,
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binder_index: ty::DebruijnIndex,
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}
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impl BoundNamesCollector {
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fn new() -> Self {
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BoundNamesCollector {
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regions: BTreeSet::new(),
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types: BTreeMap::new(),
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binder_index: ty::INNERMOST,
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}
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}
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fn is_empty(&self) -> bool {
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self.regions.is_empty() && self.types.is_empty()
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}
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fn write_names(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
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let mut start = true;
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for r in &self.regions {
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if !start {
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write!(fmt, ", ")?;
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}
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start = false;
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write!(fmt, "{}", r)?;
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}
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for (_, t) in &self.types {
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if !start {
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write!(fmt, ", ")?;
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}
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start = false;
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write!(fmt, "{}", t)?;
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}
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Ok(())
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}
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}
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impl<'tcx> TypeVisitor<'tcx> for BoundNamesCollector {
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fn visit_binder<T: TypeFoldable<'tcx>>(&mut self, t: &ty::Binder<T>) -> bool {
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self.binder_index.shift_in(1);
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let result = t.super_visit_with(self);
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self.binder_index.shift_out(1);
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result
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}
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fn visit_ty(&mut self, t: ty::Ty<'tcx>) -> bool {
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use syntax::symbol::Symbol;
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match t.sty {
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ty::Bound(bound_ty) if bound_ty.index == self.binder_index => {
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self.types.insert(
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bound_ty.var.as_u32(),
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match bound_ty.kind {
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ty::BoundTyKind::Param(name) => name,
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ty::BoundTyKind::Anon => Symbol::intern(
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&format!("?{}", bound_ty.var.as_u32())
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).as_interned_str(),
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}
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);
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}
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_ => (),
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};
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t.super_visit_with(self)
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}
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fn visit_region(&mut self, r: ty::Region<'tcx>) -> bool {
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use syntax::symbol::Symbol;
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match r {
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ty::ReLateBound(index, br) if *index == self.binder_index => {
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match br {
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ty::BoundRegion::BrNamed(_, name) => {
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self.regions.insert(*name);
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}
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ty::BoundRegion::BrAnon(var) => {
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self.regions.insert(Symbol::intern(
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&format!("?'{}", var)
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).as_interned_str());
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}
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_ => (),
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}
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}
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_ => (),
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};
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r.super_visit_with(self)
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}
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}
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impl<'tcx> fmt::Display for traits::Goal<'tcx> {
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fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
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use traits::GoalKind::*;
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@ -514,8 +625,22 @@ impl<'tcx> fmt::Display for traits::Goal<'tcx> {
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Not(goal) => write!(fmt, "not {{ {} }}", goal),
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DomainGoal(goal) => write!(fmt, "{}", goal),
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Quantified(qkind, goal) => {
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// FIXME: appropriate binder names
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write!(fmt, "{}<> {{ {} }}", qkind, goal.skip_binder())
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let mut collector = BoundNamesCollector::new();
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goal.skip_binder().visit_with(&mut collector);
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if !collector.is_empty() {
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write!(fmt, "{}<", qkind)?;
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collector.write_names(fmt)?;
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write!(fmt, "> {{ ")?;
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}
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write!(fmt, "{}", goal.skip_binder())?;
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if !collector.is_empty() {
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write!(fmt, " }}")?;
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}
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Ok(())
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}
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CannotProve => write!(fmt, "CannotProve"),
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}
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@ -546,8 +671,22 @@ impl<'tcx> fmt::Display for traits::Clause<'tcx> {
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match self {
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Implies(clause) => write!(fmt, "{}", clause),
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ForAll(clause) => {
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// FIXME: appropriate binder names
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write!(fmt, "forall<> {{ {} }}", clause.skip_binder())
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let mut collector = BoundNamesCollector::new();
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clause.skip_binder().visit_with(&mut collector);
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if !collector.is_empty() {
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write!(fmt, "forall<")?;
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collector.write_names(fmt)?;
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write!(fmt, "> {{ ")?;
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}
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write!(fmt, "{}", clause.skip_binder())?;
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if !collector.is_empty() {
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write!(fmt, " }}")?;
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}
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Ok(())
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}
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}
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}
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@ -250,8 +250,8 @@ crate fn environment<'a, 'tcx>(
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// In an fn, we assume that the arguments and all their constituents are
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// well-formed.
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if is_fn {
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// `skip_binder` because we move late bound regions to the root binder,
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// restored in the return type
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// `skip_binder` because we move region parameters to the root binder,
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// restored in the return type of this query
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let fn_sig = tcx.fn_sig(def_id).skip_binder().subst(tcx, bound_vars);
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input_tys.extend(
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@ -600,14 +600,7 @@ impl<'a, 'tcx> ClauseDumper<'a, 'tcx> {
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let mut strings: Vec<_> = clauses
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.iter()
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.map(|clause| {
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// Skip the top-level binder for a less verbose output
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let program_clause = match clause {
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Clause::Implies(program_clause) => program_clause,
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Clause::ForAll(program_clause) => program_clause.skip_binder(),
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};
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program_clause.to_string()
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})
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.map(|clause| clause.to_string())
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.collect();
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strings.sort();
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@ -17,7 +17,7 @@ trait Foo { }
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trait Bar where Self: Foo { }
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#[rustc_dump_env_program_clauses] //~ ERROR program clause dump
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fn bar<T: Bar>() {
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fn bar<T: Bar + ?Sized>() {
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}
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fn main() {
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@ -4,9 +4,9 @@ error: program clause dump
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LL | #[rustc_dump_program_clauses] //~ ERROR program clause dump
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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= note: FromEnv(Self: Foo) :- FromEnv(Self: Bar).
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= note: Implemented(Self: Bar) :- FromEnv(Self: Bar).
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= note: WellFormed(Self: Bar) :- Implemented(Self: Bar), WellFormed(Self: Foo).
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= note: forall<Self> { FromEnv(Self: Foo) :- FromEnv(Self: Bar). }
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= note: forall<Self> { Implemented(Self: Bar) :- FromEnv(Self: Bar). }
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= note: forall<Self> { WellFormed(Self: Bar) :- Implemented(Self: Bar), WellFormed(Self: Foo). }
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error: program clause dump
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--> $DIR/lower_env1.rs:19:1
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@ -14,10 +14,9 @@ error: program clause dump
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LL | #[rustc_dump_env_program_clauses] //~ ERROR program clause dump
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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= note: FromEnv(Self: Foo) :- FromEnv(Self: Bar).
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= note: Implemented(Self: Bar) :- FromEnv(Self: Bar).
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= note: Implemented(Self: Foo) :- FromEnv(Self: Foo).
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= note: Implemented(Self: std::marker::Sized) :- FromEnv(Self: std::marker::Sized).
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= note: forall<Self> { FromEnv(Self: Foo) :- FromEnv(Self: Bar). }
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= note: forall<Self> { Implemented(Self: Bar) :- FromEnv(Self: Bar). }
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= note: forall<Self> { Implemented(Self: Foo) :- FromEnv(Self: Foo). }
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error: aborting due to 2 previous errors
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@ -14,12 +14,12 @@
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trait Foo { }
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#[rustc_dump_program_clauses] //~ ERROR program clause dump
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struct S<'a, T> where T: Foo {
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struct S<'a, T: ?Sized> where T: Foo {
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data: &'a T,
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}
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#[rustc_dump_env_program_clauses] //~ ERROR program clause dump
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fn bar<'a, T: Foo>(x: S<T>) {
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fn bar<T: Foo>(_x: S<'_, T>) { // note that we have an implicit `T: Sized` bound
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}
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fn main() {
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@ -4,10 +4,9 @@ error: program clause dump
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LL | #[rustc_dump_program_clauses] //~ ERROR program clause dump
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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= note: FromEnv(T: Foo) :- FromEnv(S<'a, T>).
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= note: FromEnv(T: std::marker::Sized) :- FromEnv(S<'a, T>).
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= note: TypeOutlives(T : 'a) :- FromEnv(S<'a, T>).
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= note: WellFormed(S<'a, T>) :- Implemented(T: std::marker::Sized), Implemented(T: Foo), TypeOutlives(T : 'a).
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= note: forall<'a, T> { FromEnv(T: Foo) :- FromEnv(S<'a, T>). }
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= note: forall<'a, T> { TypeOutlives(T : 'a) :- FromEnv(S<'a, T>). }
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= note: forall<'a, T> { WellFormed(S<'a, T>) :- Implemented(T: Foo), TypeOutlives(T : 'a). }
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error: program clause dump
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--> $DIR/lower_env2.rs:21:1
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@ -15,11 +14,10 @@ error: program clause dump
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LL | #[rustc_dump_env_program_clauses] //~ ERROR program clause dump
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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= note: FromEnv(T: Foo) :- FromEnv(S<'a, T>).
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= note: FromEnv(T: std::marker::Sized) :- FromEnv(S<'a, T>).
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= note: Implemented(Self: Foo) :- FromEnv(Self: Foo).
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= note: Implemented(Self: std::marker::Sized) :- FromEnv(Self: std::marker::Sized).
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= note: TypeOutlives(T : 'a) :- FromEnv(S<'a, T>).
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= note: forall<'a, T> { FromEnv(T: Foo) :- FromEnv(S<'a, T>). }
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= note: forall<'a, T> { TypeOutlives(T : 'a) :- FromEnv(S<'a, T>). }
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= note: forall<Self> { Implemented(Self: Foo) :- FromEnv(Self: Foo). }
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= note: forall<Self> { Implemented(Self: std::marker::Sized) :- FromEnv(Self: std::marker::Sized). }
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error: aborting due to 2 previous errors
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@ -4,7 +4,7 @@ error: program clause dump
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LL | #[rustc_dump_env_program_clauses] //~ ERROR program clause dump
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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|
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= note: Implemented(Self: Foo) :- FromEnv(Self: Foo).
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= note: forall<Self> { Implemented(Self: Foo) :- FromEnv(Self: Foo). }
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error: program clause dump
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--> $DIR/lower_env3.rs:20:5
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@ -12,9 +12,9 @@ error: program clause dump
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LL | #[rustc_dump_env_program_clauses] //~ ERROR program clause dump
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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|
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= note: FromEnv(Self: std::marker::Sized) :- FromEnv(Self: std::clone::Clone).
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= note: Implemented(Self: std::clone::Clone) :- FromEnv(Self: std::clone::Clone).
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= note: Implemented(Self: std::marker::Sized) :- FromEnv(Self: std::marker::Sized).
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= note: forall<Self> { FromEnv(Self: std::marker::Sized) :- FromEnv(Self: std::clone::Clone). }
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= note: forall<Self> { Implemented(Self: std::clone::Clone) :- FromEnv(Self: std::clone::Clone). }
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= note: forall<Self> { Implemented(Self: std::marker::Sized) :- FromEnv(Self: std::marker::Sized). }
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error: aborting due to 2 previous errors
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@ -4,7 +4,7 @@ error: program clause dump
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LL | #[rustc_dump_program_clauses] //~ ERROR program clause dump
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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|
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= note: Implemented(T: Foo) :- ProjectionEq(<T as std::iter::Iterator>::Item == i32), TypeOutlives(T : 'static), Implemented(T: std::iter::Iterator), Implemented(T: std::marker::Sized).
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= note: forall<T> { Implemented(T: Foo) :- ProjectionEq(<T as std::iter::Iterator>::Item == i32), TypeOutlives(T : 'static), Implemented(T: std::iter::Iterator), Implemented(T: std::marker::Sized). }
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error: program clause dump
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--> $DIR/lower_impl.rs:23:5
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@ -12,7 +12,7 @@ error: program clause dump
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LL | #[rustc_dump_program_clauses] //~ ERROR program clause dump
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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|
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= note: Normalize(<T as Bar>::Assoc == std::vec::Vec<T>) :- Implemented(T: Bar).
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= note: forall<T> { Normalize(<T as Bar>::Assoc -> std::vec::Vec<T>) :- Implemented(T: Bar). }
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error: aborting due to 2 previous errors
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@ -11,8 +11,8 @@
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#![feature(rustc_attrs)]
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#[rustc_dump_program_clauses] //~ ERROR program clause dump
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struct Foo<T> where Box<T>: Clone {
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_x: std::marker::PhantomData<T>,
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struct Foo<'a, T> where Box<T>: Clone {
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_x: std::marker::PhantomData<&'a T>,
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}
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fn main() { }
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@ -4,9 +4,10 @@ error: program clause dump
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LL | #[rustc_dump_program_clauses] //~ ERROR program clause dump
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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|
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= note: FromEnv(T: std::marker::Sized) :- FromEnv(Foo<T>).
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= note: FromEnv(std::boxed::Box<T>: std::clone::Clone) :- FromEnv(Foo<T>).
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= note: WellFormed(Foo<T>) :- Implemented(T: std::marker::Sized), Implemented(std::boxed::Box<T>: std::clone::Clone).
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= note: forall<'a, T> { FromEnv(T: std::marker::Sized) :- FromEnv(Foo<'a, T>). }
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= note: forall<'a, T> { FromEnv(std::boxed::Box<T>: std::clone::Clone) :- FromEnv(Foo<'a, T>). }
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= note: forall<'a, T> { TypeOutlives(T : 'a) :- FromEnv(Foo<'a, T>). }
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= note: forall<'a, T> { WellFormed(Foo<'a, T>) :- Implemented(T: std::marker::Sized), Implemented(std::boxed::Box<T>: std::clone::Clone), TypeOutlives(T : 'a). }
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error: aborting due to previous error
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@ -4,10 +4,10 @@ error: program clause dump
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LL | #[rustc_dump_program_clauses] //~ ERROR program clause dump
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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|
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= note: FromEnv(<Self as Foo<S, T>>::Assoc: Bar) :- FromEnv(Self: Foo<S, T>).
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= note: FromEnv(S: std::marker::Sized) :- FromEnv(Self: Foo<S, T>).
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= note: Implemented(Self: Foo<S, T>) :- FromEnv(Self: Foo<S, T>).
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= note: WellFormed(Self: Foo<S, T>) :- Implemented(Self: Foo<S, T>), WellFormed(S: std::marker::Sized), WellFormed(<Self as Foo<S, T>>::Assoc: Bar).
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= note: forall<Self, S, T> { FromEnv(<Self as Foo<S, T>>::Assoc: Bar) :- FromEnv(Self: Foo<S, T>). }
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= note: forall<Self, S, T> { FromEnv(S: std::marker::Sized) :- FromEnv(Self: Foo<S, T>). }
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= note: forall<Self, S, T> { Implemented(Self: Foo<S, T>) :- FromEnv(Self: Foo<S, T>). }
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= note: forall<Self, S, T> { WellFormed(Self: Foo<S, T>) :- Implemented(Self: Foo<S, T>), WellFormed(S: std::marker::Sized), WellFormed(<Self as Foo<S, T>>::Assoc: Bar). }
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error: program clause dump
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--> $DIR/lower_trait.rs:17:5
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@ -15,9 +15,9 @@ error: program clause dump
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LL | #[rustc_dump_program_clauses] //~ ERROR program clause dump
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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|
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= note: FromEnv(Self: Foo<S, T>) :- FromEnv(Unnormalized(<Self as Foo<S, T>>::Assoc)).
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= note: ProjectionEq(<Self as Foo<S, T>>::Assoc == Unnormalized(<Self as Foo<S, T>>::Assoc)).
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= note: WellFormed(Unnormalized(<Self as Foo<S, T>>::Assoc)) :- Implemented(Self: Foo<S, T>).
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= note: forall<Self, S, T> { FromEnv(Self: Foo<S, T>) :- FromEnv(Unnormalized(<Self as Foo<S, T>>::Assoc)). }
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= note: forall<Self, S, T> { ProjectionEq(<Self as Foo<S, T>>::Assoc == Unnormalized(<Self as Foo<S, T>>::Assoc)). }
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= note: forall<Self, S, T> { WellFormed(Unnormalized(<Self as Foo<S, T>>::Assoc)) :- Implemented(Self: Foo<S, T>). }
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error: aborting due to 2 previous errors
|
||||
|
||||
|
@ -11,9 +11,8 @@
|
||||
#![feature(rustc_attrs)]
|
||||
|
||||
#[rustc_dump_program_clauses] //~ ERROR program clause dump
|
||||
trait Foo<F> where for<'a> F: Fn(&'a (u8, u16)) -> &'a u8
|
||||
trait Foo<F: ?Sized> where for<'a> F: Fn(&'a (u8, u16)) -> &'a u8
|
||||
{
|
||||
fn s(_: F) -> F;
|
||||
}
|
||||
|
||||
fn main() {
|
||||
|
@ -4,11 +4,10 @@ error: program clause dump
|
||||
LL | #[rustc_dump_program_clauses] //~ ERROR program clause dump
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= note: FromEnv(F: std::marker::Sized) :- FromEnv(Self: Foo<F>).
|
||||
= note: FromEnv(F: std::ops::Fn<(&'a (u8, u16),)>) :- FromEnv(Self: Foo<F>).
|
||||
= note: Implemented(Self: Foo<F>) :- FromEnv(Self: Foo<F>).
|
||||
= note: ProjectionEq(<F as std::ops::FnOnce<(&'a (u8, u16),)>>::Output == &'a u8) :- FromEnv(Self: Foo<F>).
|
||||
= note: WellFormed(Self: Foo<F>) :- Implemented(Self: Foo<F>), WellFormed(F: std::marker::Sized), forall<> { WellFormed(F: std::ops::Fn<(&'a (u8, u16),)>) }, forall<> { ProjectionEq(<F as std::ops::FnOnce<(&'a (u8, u16),)>>::Output == &'a u8) }.
|
||||
= note: forall<'a, Self, F> { FromEnv(F: std::ops::Fn<(&'a (u8, u16),)>) :- FromEnv(Self: Foo<F>). }
|
||||
= note: forall<'a, Self, F> { ProjectionEq(<F as std::ops::FnOnce<(&'a (u8, u16),)>>::Output == &'a u8) :- FromEnv(Self: Foo<F>). }
|
||||
= note: forall<Self, F> { Implemented(Self: Foo<F>) :- FromEnv(Self: Foo<F>). }
|
||||
= note: forall<Self, F> { WellFormed(Self: Foo<F>) :- Implemented(Self: Foo<F>), forall<'a> { WellFormed(F: std::ops::Fn<(&'a (u8, u16),)>) }, forall<'a> { ProjectionEq(<F as std::ops::FnOnce<(&'a (u8, u16),)>>::Output == &'a u8) }. }
|
||||
|
||||
error: aborting due to previous error
|
||||
|
||||
|
@ -10,22 +10,16 @@
|
||||
|
||||
#![feature(rustc_attrs)]
|
||||
|
||||
use std::fmt::{Debug, Display};
|
||||
use std::borrow::Borrow;
|
||||
|
||||
#[rustc_dump_program_clauses] //~ ERROR program clause dump
|
||||
trait Foo<'a, 'b, S, T, U>
|
||||
trait Foo<'a, 'b, T, U>
|
||||
where
|
||||
S: Debug,
|
||||
T: Borrow<U>,
|
||||
U: ?Sized,
|
||||
T: Borrow<U> + ?Sized,
|
||||
U: ?Sized + 'b,
|
||||
'a: 'b,
|
||||
U: 'b,
|
||||
Vec<T>:, // NOTE(#53696) this checks an empty list of bounds.
|
||||
Box<T>:, // NOTE(#53696) this checks an empty list of bounds.
|
||||
{
|
||||
fn s(_: S) -> S;
|
||||
fn t(_: T) -> T;
|
||||
fn u(_: U) -> U;
|
||||
}
|
||||
|
||||
fn main() {
|
||||
|
@ -1,18 +1,15 @@
|
||||
error: program clause dump
|
||||
--> $DIR/lower_trait_where_clause.rs:16:1
|
||||
--> $DIR/lower_trait_where_clause.rs:15:1
|
||||
|
|
||||
LL | #[rustc_dump_program_clauses] //~ ERROR program clause dump
|
||||
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
||||
|
|
||||
= note: FromEnv(S: std::fmt::Debug) :- FromEnv(Self: Foo<'a, 'b, S, T, U>).
|
||||
= note: FromEnv(S: std::marker::Sized) :- FromEnv(Self: Foo<'a, 'b, S, T, U>).
|
||||
= note: FromEnv(T: std::borrow::Borrow<U>) :- FromEnv(Self: Foo<'a, 'b, S, T, U>).
|
||||
= note: FromEnv(T: std::marker::Sized) :- FromEnv(Self: Foo<'a, 'b, S, T, U>).
|
||||
= note: Implemented(Self: Foo<'a, 'b, S, T, U>) :- FromEnv(Self: Foo<'a, 'b, S, T, U>).
|
||||
= note: RegionOutlives('a : 'b) :- FromEnv(Self: Foo<'a, 'b, S, T, U>).
|
||||
= note: TypeOutlives(U : 'b) :- FromEnv(Self: Foo<'a, 'b, S, T, U>).
|
||||
= note: WellFormed(Self: Foo<'a, 'b, S, T, U>) :- Implemented(Self: Foo<'a, 'b, S, T, U>), WellFormed(S: std::marker::Sized), WellFormed(T: std::marker::Sized), WellFormed(S: std::fmt::Debug), WellFormed(T: std::borrow::Borrow<U>), RegionOutlives('a : 'b), TypeOutlives(U : 'b), WellFormed(std::vec::Vec<T>).
|
||||
= note: WellFormed(std::vec::Vec<T>) :- FromEnv(Self: Foo<'a, 'b, S, T, U>).
|
||||
= note: forall<'a, 'b, Self, T, U> { FromEnv(T: std::borrow::Borrow<U>) :- FromEnv(Self: Foo<'a, 'b, T, U>). }
|
||||
= note: forall<'a, 'b, Self, T, U> { Implemented(Self: Foo<'a, 'b, T, U>) :- FromEnv(Self: Foo<'a, 'b, T, U>). }
|
||||
= note: forall<'a, 'b, Self, T, U> { RegionOutlives('a : 'b) :- FromEnv(Self: Foo<'a, 'b, T, U>). }
|
||||
= note: forall<'a, 'b, Self, T, U> { TypeOutlives(U : 'b) :- FromEnv(Self: Foo<'a, 'b, T, U>). }
|
||||
= note: forall<'a, 'b, Self, T, U> { WellFormed(Self: Foo<'a, 'b, T, U>) :- Implemented(Self: Foo<'a, 'b, T, U>), WellFormed(T: std::borrow::Borrow<U>), TypeOutlives(U : 'b), RegionOutlives('a : 'b), WellFormed(std::boxed::Box<T>). }
|
||||
= note: forall<'a, 'b, Self, T, U> { WellFormed(std::boxed::Box<T>) :- FromEnv(Self: Foo<'a, 'b, T, U>). }
|
||||
|
||||
error: aborting due to previous error
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user