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Rollup merge of #77155 - lcnr:ImplSource, r=ecstatic-morse

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remove enum name from ImplSource variants

This is quite a lot cleaner in my opinion.
This commit is contained in:
Jonas Schievink 2020-09-25 19:42:48 +02:00 • committed by GitHub
commit e739468f97
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8 changed files with 104 additions and 110 deletions
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89
compiler/rustc_middle/src/traits/mod.rs
View file

@ -28,7 +28,6 @@ pub use self::select::{EvaluationCache, EvaluationResult, OverflowError, Selecti
pub type CanonicalChalkEnvironmentAndGoal<'tcx> = Canonical<'tcx, ChalkEnvironmentAndGoal<'tcx>>;
pub use self::ImplSource::*;
pub use self::ObligationCauseCode::*;
pub use self::chalk::{ChalkEnvironmentAndGoal, RustInterner as ChalkRustInterner};
@ -418,10 +417,10 @@ pub type SelectionResult<'tcx, T> = Result<Option<T>, SelectionError<'tcx>>;
///
/// // Case B: ImplSource must be provided by caller. This applies when
/// // type is a type parameter.
/// param.clone(); // ImplSourceParam
/// param.clone(); // ImplSource::Param
///
/// // Case C: A mix of cases A and B.
/// mixed.clone(); // ImplSource(Impl_1, [ImplSourceParam])
/// mixed.clone(); // ImplSource(Impl_1, [ImplSource::Param])
/// }
/// ```
///
@ -431,72 +430,72 @@ pub type SelectionResult<'tcx, T> = Result<Option<T>, SelectionError<'tcx>>;
#[derive(Clone, PartialEq, Eq, TyEncodable, TyDecodable, HashStable, TypeFoldable, Lift)]
pub enum ImplSource<'tcx, N> {
/// ImplSource identifying a particular impl.
ImplSourceUserDefined(ImplSourceUserDefinedData<'tcx, N>),
UserDefined(ImplSourceUserDefinedData<'tcx, N>),
/// ImplSource for auto trait implementations.
/// This carries the information and nested obligations with regards
/// to an auto implementation for a trait `Trait`. The nested obligations
/// ensure the trait implementation holds for all the constituent types.
ImplSourceAutoImpl(ImplSourceAutoImplData<N>),
AutoImpl(ImplSourceAutoImplData<N>),
/// Successful resolution to an obligation provided by the caller
/// for some type parameter. The `Vec<N>` represents the
/// obligations incurred from normalizing the where-clause (if
/// any).
ImplSourceParam(Vec<N>),
Param(Vec<N>),
/// Virtual calls through an object.
ImplSourceObject(ImplSourceObjectData<'tcx, N>),
Object(ImplSourceObjectData<'tcx, N>),
/// Successful resolution for a builtin trait.
ImplSourceBuiltin(ImplSourceBuiltinData<N>),
Builtin(ImplSourceBuiltinData<N>),
/// ImplSource automatically generated for a closure. The `DefId` is the ID
/// of the closure expression. This is a `ImplSourceUserDefined` in spirit, but the
/// of the closure expression. This is a `ImplSource::UserDefined` in spirit, but the
/// impl is generated by the compiler and does not appear in the source.
ImplSourceClosure(ImplSourceClosureData<'tcx, N>),
Closure(ImplSourceClosureData<'tcx, N>),
/// Same as above, but for a function pointer type with the given signature.
ImplSourceFnPointer(ImplSourceFnPointerData<'tcx, N>),
FnPointer(ImplSourceFnPointerData<'tcx, N>),
/// ImplSource for a builtin `DeterminantKind` trait implementation.
ImplSourceDiscriminantKind(ImplSourceDiscriminantKindData),
DiscriminantKind(ImplSourceDiscriminantKindData),
/// ImplSource automatically generated for a generator.
ImplSourceGenerator(ImplSourceGeneratorData<'tcx, N>),
Generator(ImplSourceGeneratorData<'tcx, N>),
/// ImplSource for a trait alias.
ImplSourceTraitAlias(ImplSourceTraitAliasData<'tcx, N>),
TraitAlias(ImplSourceTraitAliasData<'tcx, N>),
}
impl<'tcx, N> ImplSource<'tcx, N> {
pub fn nested_obligations(self) -> Vec<N> {
match self {
ImplSourceUserDefined(i) => i.nested,
ImplSourceParam(n) => n,
ImplSourceBuiltin(i) => i.nested,
ImplSourceAutoImpl(d) => d.nested,
ImplSourceClosure(c) => c.nested,
ImplSourceGenerator(c) => c.nested,
ImplSourceObject(d) => d.nested,
ImplSourceFnPointer(d) => d.nested,
ImplSourceDiscriminantKind(ImplSourceDiscriminantKindData) => Vec::new(),
ImplSourceTraitAlias(d) => d.nested,
ImplSource::UserDefined(i) => i.nested,
ImplSource::Param(n) => n,
ImplSource::Builtin(i) => i.nested,
ImplSource::AutoImpl(d) => d.nested,
ImplSource::Closure(c) => c.nested,
ImplSource::Generator(c) => c.nested,
ImplSource::Object(d) => d.nested,
ImplSource::FnPointer(d) => d.nested,
ImplSource::DiscriminantKind(ImplSourceDiscriminantKindData) => Vec::new(),
ImplSource::TraitAlias(d) => d.nested,
}
}
pub fn borrow_nested_obligations(&self) -> &[N] {
match &self {
ImplSourceUserDefined(i) => &i.nested[..],
ImplSourceParam(n) => &n[..],
ImplSourceBuiltin(i) => &i.nested[..],
ImplSourceAutoImpl(d) => &d.nested[..],
ImplSourceClosure(c) => &c.nested[..],
ImplSourceGenerator(c) => &c.nested[..],
ImplSourceObject(d) => &d.nested[..],
ImplSourceFnPointer(d) => &d.nested[..],
ImplSourceDiscriminantKind(ImplSourceDiscriminantKindData) => &[],
ImplSourceTraitAlias(d) => &d.nested[..],
ImplSource::UserDefined(i) => &i.nested[..],
ImplSource::Param(n) => &n[..],
ImplSource::Builtin(i) => &i.nested[..],
ImplSource::AutoImpl(d) => &d.nested[..],
ImplSource::Closure(c) => &c.nested[..],
ImplSource::Generator(c) => &c.nested[..],
ImplSource::Object(d) => &d.nested[..],
ImplSource::FnPointer(d) => &d.nested[..],
ImplSource::DiscriminantKind(ImplSourceDiscriminantKindData) => &[],
ImplSource::TraitAlias(d) => &d.nested[..],
}
}
@ -505,42 +504,42 @@ impl<'tcx, N> ImplSource<'tcx, N> {
F: FnMut(N) -> M,
{
match self {
ImplSourceUserDefined(i) => ImplSourceUserDefined(ImplSourceUserDefinedData {
ImplSource::UserDefined(i) => ImplSource::UserDefined(ImplSourceUserDefinedData {
impl_def_id: i.impl_def_id,
substs: i.substs,
nested: i.nested.into_iter().map(f).collect(),
}),
ImplSourceParam(n) => ImplSourceParam(n.into_iter().map(f).collect()),
ImplSourceBuiltin(i) => ImplSourceBuiltin(ImplSourceBuiltinData {
ImplSource::Param(n) => ImplSource::Param(n.into_iter().map(f).collect()),
ImplSource::Builtin(i) => ImplSource::Builtin(ImplSourceBuiltinData {
nested: i.nested.into_iter().map(f).collect(),
}),
ImplSourceObject(o) => ImplSourceObject(ImplSourceObjectData {
ImplSource::Object(o) => ImplSource::Object(ImplSourceObjectData {
upcast_trait_ref: o.upcast_trait_ref,
vtable_base: o.vtable_base,
nested: o.nested.into_iter().map(f).collect(),
}),
ImplSourceAutoImpl(d) => ImplSourceAutoImpl(ImplSourceAutoImplData {
ImplSource::AutoImpl(d) => ImplSource::AutoImpl(ImplSourceAutoImplData {
trait_def_id: d.trait_def_id,
nested: d.nested.into_iter().map(f).collect(),
}),
ImplSourceClosure(c) => ImplSourceClosure(ImplSourceClosureData {
ImplSource::Closure(c) => ImplSource::Closure(ImplSourceClosureData {
closure_def_id: c.closure_def_id,
substs: c.substs,
nested: c.nested.into_iter().map(f).collect(),
}),
ImplSourceGenerator(c) => ImplSourceGenerator(ImplSourceGeneratorData {
ImplSource::Generator(c) => ImplSource::Generator(ImplSourceGeneratorData {
generator_def_id: c.generator_def_id,
substs: c.substs,
nested: c.nested.into_iter().map(f).collect(),
}),
ImplSourceFnPointer(p) => ImplSourceFnPointer(ImplSourceFnPointerData {
ImplSource::FnPointer(p) => ImplSource::FnPointer(ImplSourceFnPointerData {
fn_ty: p.fn_ty,
nested: p.nested.into_iter().map(f).collect(),
}),
ImplSourceDiscriminantKind(ImplSourceDiscriminantKindData) => {
ImplSourceDiscriminantKind(ImplSourceDiscriminantKindData)
ImplSource::DiscriminantKind(ImplSourceDiscriminantKindData) => {
ImplSource::DiscriminantKind(ImplSourceDiscriminantKindData)
}
ImplSourceTraitAlias(d) => ImplSourceTraitAlias(ImplSourceTraitAliasData {
ImplSource::TraitAlias(d) => ImplSource::TraitAlias(ImplSourceTraitAliasData {
alias_def_id: d.alias_def_id,
substs: d.substs,
nested: d.nested.into_iter().map(f).collect(),

22
compiler/rustc_middle/src/traits/structural_impls.rs
View file

@ -7,25 +7,25 @@ use std::fmt;
impl<'tcx, N: fmt::Debug> fmt::Debug for traits::ImplSource<'tcx, N> {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match *self {
super::ImplSourceUserDefined(ref v) => write!(f, "{:?}", v),
super::ImplSource::UserDefined(ref v) => write!(f, "{:?}", v),
super::ImplSourceAutoImpl(ref t) => write!(f, "{:?}", t),
super::ImplSource::AutoImpl(ref t) => write!(f, "{:?}", t),
super::ImplSourceClosure(ref d) => write!(f, "{:?}", d),
super::ImplSource::Closure(ref d) => write!(f, "{:?}", d),
super::ImplSourceGenerator(ref d) => write!(f, "{:?}", d),
super::ImplSource::Generator(ref d) => write!(f, "{:?}", d),
super::ImplSourceFnPointer(ref d) => write!(f, "ImplSourceFnPointer({:?})", d),
super::ImplSource::FnPointer(ref d) => write!(f, "({:?})", d),
super::ImplSourceDiscriminantKind(ref d) => write!(f, "{:?}", d),
super::ImplSource::DiscriminantKind(ref d) => write!(f, "{:?}", d),
super::ImplSourceObject(ref d) => write!(f, "{:?}", d),
super::ImplSource::Object(ref d) => write!(f, "{:?}", d),
super::ImplSourceParam(ref n) => write!(f, "ImplSourceParam({:?})", n),
super::ImplSource::Param(ref n) => write!(f, "ImplSourceParamData({:?})", n),
super::ImplSourceBuiltin(ref d) => write!(f, "{:?}", d),
super::ImplSource::Builtin(ref d) => write!(f, "{:?}", d),
super::ImplSourceTraitAlias(ref d) => write!(f, "{:?}", d),
super::ImplSource::TraitAlias(ref d) => write!(f, "{:?}", d),
}
}
}
@ -96,7 +96,7 @@ impl<'tcx, N: fmt::Debug> fmt::Debug for traits::ImplSourceTraitAliasData<'tcx,
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(
f,
"ImplSourceTraitAlias(alias_def_id={:?}, substs={:?}, nested={:?})",
"ImplSourceTraitAliasData(alias_def_id={:?}, substs={:?}, nested={:?})",
self.alias_def_id, self.substs, self.nested
)
}