fdd5aec172
This refactors and improves the `#eval` command, introducing some new
features.
* Now evaluated results can be represented using `ToExpr` and pretty
printing. This means **hoverable output**. If `ToExpr` fails, it then
tries `Repr` and then `ToString`. The `eval.pp` option controls whether
or not to try `ToExpr`.
* There is now **auto-derivation** of `Repr` instances, enabled with the
`pp.derive.repr` option (default to **true**). For example:
```lean
inductive Baz
| a | b
#eval Baz.a
-- Baz.a
```
It simply does `deriving instance Repr for Baz` when there's no way to
represent `Baz`. If core Lean gets `ToExpr` derive handlers, they could
be used here as well.
* The option `eval.type` controls whether or not to include the type in
the output. For now the default is false.
* Now things like `#eval do return 2` work. It tries using
`CommandElabM`, `TermElabM`, or `IO` when the monad is unknown.
* Now there is no longer `Lean.Eval` or `Lean.MetaEval`. These each used
to be responsible for both adapting monads and printing results. The
concerns have been split into two. (1) The `MonadEval` class is
responsible for adapting monads for evaluation (it is similar to
`MonadLift`, but instances are allowed to use default data when
initializing state) and (2) finding a way to represent results is
handled separately.
* Error messages about failed instance synthesis are now more precise.
Once it detects that a `MonadEval` class applies, then the error message
will be specific about missing `ToExpr`/`Repr`/`ToString` instances.
* Fixes a bug where `Repr`/`ToString` instances can't be found by
unfolding types "under the monad". For example, this works now:
```lean
def Foo := List Nat
def Foo.mk (l : List Nat) : Foo := l
#eval show Lean.CoreM Foo from do return Foo.mk [1,2,3]
```
* Elaboration errors now abort evaluation. This eliminates some
not-so-relevant error messages.
* Now evaluating a value of type `m Unit` never prints a blank message.
* Fixes bugs where evaluating `MetaM` and `CoreM` wouldn't collect log
messages.
The `run_cmd`, `run_elab`, and `run_meta` commands are now frontends for
`#eval`.
57 lines
4 KiB
Text
57 lines
4 KiB
Text
Vec.zip : {α : Type u_1} → {n : Nat} → {β : Type u_2} → Vec α ◾ → Vec β ◾ → Vec (α × β) ◾
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mkConstTuple : {α : Type u_1} → α → Nat → ◾
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Fin.add : {n : Nat} → Fin ◾ → Fin ◾ → Fin ◾
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Vec.cons : {α : Type u} → {n : Nat} → α → Vec α ◾ → Vec α ◾
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Eq.rec : {α : Sort u_1} → {a : α} → {motive : α → ◾ → Sort u} → motive ◾ ◾ → {a : α} → ◾ → motive ◾ ◾
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GetElem.getElem : {coll : Type u} →
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{idx : Type v} →
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{elem : Type w} → {valid : coll → idx → Prop} → [self : GetElem coll idx elem ◾] → coll → idx → ◾ → elem
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Term.constFold : {ctx : List Ty} → {ty : Ty} → _root_.Term ◾ ◾ → _root_.Term ◾ ◾
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Term.denote : {ctx : List Ty} → {ty : Ty} → _root_.Term ◾ ◾ → HList ◾ ◾ → ◾
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HList.get : {α : Type u_1} → {β : α → Type u_2} → {is : List α} → {i : α} → HList β ◾ → Member ◾ ◾ → β ◾
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Member.head : {α : Type u_1} → {a : α} → {as : List α} → Member ◾ ◾
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Ty.denote : Ty → Type
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MonadControl.liftWith : {m : Type u → Type v} →
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{n : Type u → Type w} → [self : MonadControl m n] → {α : Type u} → (({β : Type u} → n β → m ◾) → m α) → n α
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MonadControl.restoreM : {m : Type u → Type v} → {n : Type u → Type w} → [self : MonadControl m n] → {α : Type u} → m ◾ → n α
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Decidable.casesOn : {p : Prop} → {motive : Decidable ◾ → Sort u} → Decidable ◾ → (◾ → motive ◾) → (◾ → motive ◾) → motive ◾
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Lean.getConstInfo : {m : Type → Type} → [inst : Monad m] → [inst : MonadEnv m] → [inst : MonadError m] → Name → m ConstantInfo
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Lean.Meta.instMonadMetaM : Monad fun α =>
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Context → ST.Ref PUnit State → Core.Context → ST.Ref PUnit Core.State → PUnit → EStateM.Result Exception PUnit α
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Lean.Meta.inferType : Expr →
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Context → ST.Ref PUnit State → Core.Context → ST.Ref PUnit Core.State → PUnit → EStateM.Result Exception PUnit Expr
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Lean.Elab.Term.elabTerm : Syntax →
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Option Expr →
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Bool →
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Bool →
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Elab.Term.Context →
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ST.Ref PUnit Elab.Term.State →
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Context →
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ST.Ref PUnit State → Core.Context → ST.Ref PUnit Core.State → PUnit → EStateM.Result Exception PUnit Expr
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Nat.add : Nat → Nat → Nat
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Magma.mul : Magma → ◾ → ◾ → ◾
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weird1 : Bool → ◾
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lamAny₁ : Bool → Monad ◾
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lamAny₂ : Bool → Monad ◾
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Term.constFold : List Ty → Ty → _root_.Term lcErased lcErased → _root_.Term lcErased lcErased
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Term.denote : List Ty → Ty → _root_.Term lcErased lcErased → HList Ty lcErased lcErased → lcErased
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HList.get : lcErased →
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lcErased → List lcErased → lcErased → HList lcErased lcErased lcErased → Member lcErased lcErased lcErased → lcErased
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Member.head : lcErased → lcErased → List lcErased → Member lcErased lcErased lcErased
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Ty.denote : lcErased
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MonadControl.liftWith : lcErased →
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lcErased → MonadControl lcErased lcErased → lcErased → ((lcErased → lcErased → lcErased) → lcErased) → lcErased
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MonadControl.restoreM : lcErased → lcErased → MonadControl lcErased lcErased → lcErased → lcErased → lcErased
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Decidable.casesOn : lcErased → lcErased → Bool → (lcErased → lcErased) → (lcErased → lcErased) → lcErased
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Lean.getConstInfo : lcErased → Monad lcErased → MonadEnv lcErased → MonadError lcErased → Name → lcErased
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Lean.Meta.instMonadMetaM : Monad lcErased
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Lean.Meta.inferType : Expr → Context → lcErased → Core.Context → lcErased → PUnit → EStateM.Result Exception PUnit Expr
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Lean.Elab.Term.elabTerm : Syntax →
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Option Expr →
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Bool →
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Bool →
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Elab.Term.Context →
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lcErased → Context → lcErased → Core.Context → lcErased → PUnit → EStateM.Result Exception PUnit Expr
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Nat.add : Nat → Nat → Nat
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Fin.add : Nat → Nat → Nat → Nat
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Lean.HashSetBucket.update : lcErased → Array (List lcErased) → USize → List lcErased → lcErased → Array (List lcErased)
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