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feat: add Meta.synthInstance.apply trace class #12699

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Merged
kim-em merged 2 commits into from
Mar 1, 2026
Merged

feat: add Meta.synthInstance.apply trace class #12699

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e5404cf
feat: add `Meta.synthInstance.apply` trace class
kim-em Feb 26, 2026
e50492b
test: update expected output for `Meta.synthInstance.apply` trace class
kim-em Feb 27, 2026
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3 changes: 2 additions & 1 deletion src/Lean/Meta/SynthInstance.lean
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Original file line number Diff line number Diff line change
Expand Up @@ -573,7 +573,7 @@ def generate : SynthM Unit := do
modify fun s => { s with generatorStack := s.generatorStack.pop }
return
discard do withMCtx mctx do
withTraceNode `Meta.synthInstance
withTraceNode `Meta.synthInstance.apply
(return m!"{exceptOptionEmoji ·} apply {inst.val} to {← instantiateMVars (← inferType mvar)}") do
modifyTop fun gNode => { gNode with currInstanceIdx := idx }
if let some (mctx, subgoals) ← tryResolve mvar inst then
Expand Down Expand Up @@ -982,6 +982,7 @@ register_builtin_option trace.Meta.synthInstance : Bool := {

builtin_initialize
registerTraceClass `Meta.synthPending
registerTraceClass `Meta.synthInstance.apply (inherited := true)
registerTraceClass `Meta.synthInstance.instances (inherited := true)
registerTraceClass `Meta.synthInstance.tryResolve (inherited := true)
registerTraceClass `Meta.synthInstance.answer (inherited := true)
Expand Down
2 changes: 1 addition & 1 deletion tests/elab/366.lean.out.expected
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
[Meta.synthInstance] ✅️ Inhabited Nat
[Meta.synthInstance] new goal Inhabited Nat
[Meta.synthInstance.instances] #[@instInhabitedOfMonad, instInhabitedNat]
[Meta.synthInstance] ✅️ apply instInhabitedNat to Inhabited Nat
[Meta.synthInstance.apply] ✅️ apply instInhabitedNat to Inhabited Nat
[Meta.synthInstance.tryResolve] ✅️ Inhabited Nat ≟ Inhabited Nat
[Meta.synthInstance.answer] ✅️ Inhabited Nat
[Meta.synthInstance] result instInhabitedNat
58 changes: 29 additions & 29 deletions tests/elab/815b.lean.out.expected
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Expand Up @@ -8,15 +8,15 @@
[Meta.synthInstance] ✅️ IsSmooth fun g a => f (g a) d
[Meta.synthInstance] new goal IsSmooth fun g a => f (g a) d
[Meta.synthInstance.instances] #[@identity, @const, @parm, @comp, @diag, @swap, inst✝]
[Meta.synthInstance] ❌️ apply inst✝ to IsSmooth fun g a => f (g a) d
[Meta.synthInstance.apply] ❌️ apply inst✝ to IsSmooth fun g a => f (g a) d
[Meta.synthInstance.tryResolve] ❌️ IsSmooth fun g a => f (g a) d ≟ IsSmooth f
[Meta.synthInstance] ✅️ apply @swap to IsSmooth fun g a => f (g a) d
[Meta.synthInstance.apply] ✅️ apply @swap to IsSmooth fun g a => f (g a) d
[Meta.synthInstance.tryResolve] ✅️ IsSmooth fun g a => f (g a) d ≟ IsSmooth fun b a => f (b a) d
[Meta.synthInstance] new goal ∀ (a : α), IsSmooth fun g => f (g a) d
[Meta.synthInstance.instances] #[@identity, @const, @parm, @comp, @diag, inst✝]
[Meta.synthInstance] ❌️ apply inst✝ to ∀ (a : α), IsSmooth fun g => f (g a) d
[Meta.synthInstance.apply] ❌️ apply inst✝ to ∀ (a : α), IsSmooth fun g => f (g a) d
[Meta.synthInstance.tryResolve] ❌️ IsSmooth fun g => f (g a) d ≟ IsSmooth f
[Meta.synthInstance] ✅️ apply @diag to ∀ (a : α), IsSmooth fun g => f (g a) d
[Meta.synthInstance.apply] ✅️ apply @diag to ∀ (a : α), IsSmooth fun g => f (g a) d
[Meta.synthInstance.tryResolve] ✅️ IsSmooth fun g => f (g a) d ≟ IsSmooth fun a_1 => f (a_1 a) d
[Meta.synthInstance.unusedArgs] ∀ (a : α), IsSmooth f
has unused arguments, reduced type
Expand All @@ -25,7 +25,7 @@
fun redf a => redf
[Meta.synthInstance] new goal IsSmooth f
[Meta.synthInstance.instances] #[inst✝]
[Meta.synthInstance] ✅️ apply inst✝ to IsSmooth f
[Meta.synthInstance.apply] ✅️ apply inst✝ to IsSmooth f
[Meta.synthInstance.tryResolve] ✅️ IsSmooth f ≟ IsSmooth f
[Meta.synthInstance.answer] ✅️ IsSmooth f
[Meta.synthInstance.resume] propagating IsSmooth f to subgoal IsSmooth f of ∀ (a : α), IsSmooth fun g => f (g a) d
Expand All @@ -45,23 +45,23 @@
fun redf a => redf
[Meta.synthInstance] new goal ∀ (b : β), IsSmooth (f b)
[Meta.synthInstance.instances] #[inst✝]
[Meta.synthInstance] ❌️ apply inst✝ to ∀ (b : β), IsSmooth (f b)
[Meta.synthInstance.apply] ❌️ apply inst✝ to ∀ (b : β), IsSmooth (f b)
[Meta.synthInstance.tryResolve] ❌️ IsSmooth (f b) ≟ IsSmooth f
[Meta.synthInstance] ❌️ apply @comp to ∀ (a : α), IsSmooth fun g => f (g a) d
[Meta.synthInstance.apply] ❌️ apply @comp to ∀ (a : α), IsSmooth fun g => f (g a) d
[Meta.synthInstance.tryResolve] ❌️ IsSmooth fun g => f (g a) d ≟ IsSmooth fun a_1 => ?m a (?m a a_1)
[Meta.synthInstance] ✅️ apply @parm to ∀ (a : α), IsSmooth fun g => f (g a) d
[Meta.synthInstance.apply] ✅️ apply @parm to ∀ (a : α), IsSmooth fun g => f (g a) d
[Meta.synthInstance.tryResolve] ✅️ IsSmooth fun g => f (g a) d ≟ IsSmooth fun a_1 => f (a_1 a) d
[Meta.synthInstance] new goal ∀ (a : α), IsSmooth fun g => f (g a)
[Meta.synthInstance.instances] #[@identity, @const, @parm, @comp, @diag, @swap, inst✝]
[Meta.synthInstance] ❌️ apply inst✝ to ∀ (a : α), IsSmooth fun g => f (g a)
[Meta.synthInstance.apply] ❌️ apply inst✝ to ∀ (a : α), IsSmooth fun g => f (g a)
[Meta.synthInstance.tryResolve] ❌️ IsSmooth fun g => f (g a) ≟ IsSmooth f
[Meta.synthInstance] ✅️ apply @swap to ∀ (a : α), IsSmooth fun g => f (g a)
[Meta.synthInstance.apply] ✅️ apply @swap to ∀ (a : α), IsSmooth fun g => f (g a)
[Meta.synthInstance.tryResolve] ✅️ IsSmooth fun g => f (g a) ≟ IsSmooth fun b a_1 => f (b a) a_1
[Meta.synthInstance] new goal ∀ (a : α) (a_1 : δ), IsSmooth fun g => f (g a) a_1
[Meta.synthInstance.instances] #[@identity, @const, @parm, @comp, @diag, inst✝]
[Meta.synthInstance] ❌️ apply inst✝ to ∀ (a : α) (a_1 : δ), IsSmooth fun g => f (g a) a_1
[Meta.synthInstance.apply] ❌️ apply inst✝ to ∀ (a : α) (a_1 : δ), IsSmooth fun g => f (g a) a_1
[Meta.synthInstance.tryResolve] ❌️ IsSmooth fun g => f (g a✝) a ≟ IsSmooth f
[Meta.synthInstance] ✅️ apply @diag to ∀ (a : α) (a_1 : δ), IsSmooth fun g => f (g a) a_1
[Meta.synthInstance.apply] ✅️ apply @diag to ∀ (a : α) (a_1 : δ), IsSmooth fun g => f (g a) a_1
[Meta.synthInstance.tryResolve] ✅️ IsSmooth fun g => f (g a✝) a ≟ IsSmooth fun a_1 => f (a_1 a✝) a
[Meta.synthInstance.unusedArgs] ∀ (a : α) (a : δ), IsSmooth f
has unused arguments, reduced type
Expand All @@ -76,23 +76,23 @@
∀ (b : β), IsSmooth (f b)
Transformer
fun redf a a_1 => redf
[Meta.synthInstance] ❌️ apply @comp to ∀ (a : α) (a_1 : δ), IsSmooth fun g => f (g a) a_1
[Meta.synthInstance.apply] ❌️ apply @comp to ∀ (a : α) (a_1 : δ), IsSmooth fun g => f (g a) a_1
[Meta.synthInstance.tryResolve] ❌️ IsSmooth fun g => f (g a✝) a ≟ IsSmooth fun a_1 => ?m a✝ a (?m a✝ a a_1)
[Meta.synthInstance] ✅️ apply @parm to ∀ (a : α) (a_1 : δ), IsSmooth fun g => f (g a) a_1
[Meta.synthInstance.apply] ✅️ apply @parm to ∀ (a : α) (a_1 : δ), IsSmooth fun g => f (g a) a_1
[Meta.synthInstance.tryResolve] ✅️ IsSmooth fun g => f (g a✝) a ≟ IsSmooth fun a_1 => f (a_1 a✝) a
[Meta.synthInstance.unusedArgs] ∀ (a : α) (a_1 : δ), IsSmooth fun g => f (g a)
has unused arguments, reduced type
∀ (a : α), IsSmooth fun g => f (g a)
Transformer
fun redf a a_1 => redf a
[Meta.synthInstance] ❌️ apply @const to ∀ (a : α) (a_1 : δ), IsSmooth fun g => f (g a) a_1
[Meta.synthInstance.apply] ❌️ apply @const to ∀ (a : α) (a_1 : δ), IsSmooth fun g => f (g a) a_1
[Meta.synthInstance.tryResolve] ❌️ IsSmooth fun g => f (g a✝) a ≟ IsSmooth fun a_1 => ?m a✝ a
[Meta.synthInstance] ❌️ apply @identity to ∀ (a : α) (a_1 : δ), IsSmooth fun g => f (g a) a_1
[Meta.synthInstance.apply] ❌️ apply @identity to ∀ (a : α) (a_1 : δ), IsSmooth fun g => f (g a) a_1
[Meta.synthInstance.tryResolve] ❌️ IsSmooth fun g => f (g a✝) a ≟ IsSmooth fun a => a
[Meta.synthInstance] ❌️ apply @diag to ∀ (a : α), IsSmooth fun g => f (g a)
[Meta.synthInstance.apply] ❌️ apply @diag to ∀ (a : α), IsSmooth fun g => f (g a)
[Meta.synthInstance.tryResolve] ❌️ IsSmooth fun g =>
f (g a) ≟ IsSmooth fun a_1 => ?m a (?m a a_1) (?m a a_1)
[Meta.synthInstance] ✅️ apply @comp to ∀ (a : α), IsSmooth fun g => f (g a)
[Meta.synthInstance.apply] ✅️ apply @comp to ∀ (a : α), IsSmooth fun g => f (g a)
[Meta.synthInstance.tryResolve] ✅️ IsSmooth fun g => f (g a) ≟ IsSmooth fun a_1 => f (a_1 a)
[Meta.synthInstance.unusedArgs] ∀ (a : α), IsSmooth f
has unused arguments, reduced type
Expand All @@ -104,13 +104,13 @@
[Meta.synthInstance.resume] size: 1
[Meta.synthInstance] new goal ∀ (a : α), IsSmooth fun g => g a
[Meta.synthInstance.instances] #[@identity, @const, @parm, @comp, @diag, inst✝]
[Meta.synthInstance] ❌️ apply inst✝ to ∀ (a : α), IsSmooth fun g => g a
[Meta.synthInstance.apply] ❌️ apply inst✝ to ∀ (a : α), IsSmooth fun g => g a
[Meta.synthInstance.tryResolve] ❌️ IsSmooth fun g => g a ≟ IsSmooth f
[Meta.synthInstance] ❌️ apply @diag to ∀ (a : α), IsSmooth fun g => g a
[Meta.synthInstance.apply] ❌️ apply @diag to ∀ (a : α), IsSmooth fun g => g a
[Meta.synthInstance.tryResolve] ❌️ IsSmooth fun g => g a ≟ IsSmooth fun a_1 => ?m a (?m a a_1) (?m a a_1)
[Meta.synthInstance] ❌️ apply @comp to ∀ (a : α), IsSmooth fun g => g a
[Meta.synthInstance.apply] ❌️ apply @comp to ∀ (a : α), IsSmooth fun g => g a
[Meta.synthInstance.tryResolve] ❌️ IsSmooth fun g => g a ≟ IsSmooth fun a_1 => ?m a (?m a a_1)
[Meta.synthInstance] ✅️ apply @parm to ∀ (a : α), IsSmooth fun g => g a
[Meta.synthInstance.apply] ✅️ apply @parm to ∀ (a : α), IsSmooth fun g => g a
[Meta.synthInstance.tryResolve] ✅️ IsSmooth fun g => g a ≟ IsSmooth fun a_1 => a_1 a
[Meta.synthInstance.unusedArgs] ∀ (a : α), IsSmooth fun g => g
has unused arguments, reduced type
Expand All @@ -119,19 +119,19 @@
fun redf a => redf
[Meta.synthInstance] new goal IsSmooth fun g => g
[Meta.synthInstance.instances] #[@identity, @const, @parm, @comp, @diag, @swap, inst✝]
[Meta.synthInstance] ❌️ apply inst✝ to IsSmooth fun g => g
[Meta.synthInstance.apply] ❌️ apply inst✝ to IsSmooth fun g => g
[Meta.synthInstance.tryResolve] ❌️ IsSmooth fun g => g ≟ IsSmooth f
[Meta.synthInstance] ✅️ apply @swap to IsSmooth fun g => g
[Meta.synthInstance.apply] ✅️ apply @swap to IsSmooth fun g => g
[Meta.synthInstance.tryResolve] ✅️ IsSmooth fun g => g ≟ IsSmooth fun b a => b a
[Meta.synthInstance] ❌️ apply @diag to IsSmooth fun g => g
[Meta.synthInstance.apply] ❌️ apply @diag to IsSmooth fun g => g
[Meta.synthInstance.tryResolve] ❌️ IsSmooth fun g => g ≟ IsSmooth fun a => ?m (?m a) (?m a)
[Meta.synthInstance] ❌️ apply @comp to IsSmooth fun g => g
[Meta.synthInstance.apply] ❌️ apply @comp to IsSmooth fun g => g
[Meta.synthInstance.tryResolve] ❌️ IsSmooth fun g => g ≟ IsSmooth fun a => ?m (?m a)
[Meta.synthInstance] ❌️ apply @parm to IsSmooth fun g => g
[Meta.synthInstance.apply] ❌️ apply @parm to IsSmooth fun g => g
[Meta.synthInstance.tryResolve] ❌️ IsSmooth fun g => g ≟ IsSmooth fun a => ?m a ?m
[Meta.synthInstance] ❌️ apply @const to IsSmooth fun g => g
[Meta.synthInstance.apply] ❌️ apply @const to IsSmooth fun g => g
[Meta.synthInstance.tryResolve] ❌️ IsSmooth fun g => g ≟ IsSmooth fun a => ?m
[Meta.synthInstance] ✅️ apply @identity to IsSmooth fun g => g
[Meta.synthInstance.apply] ✅️ apply @identity to IsSmooth fun g => g
[Meta.synthInstance.tryResolve] ✅️ IsSmooth fun g => g ≟ IsSmooth fun a => a
[Meta.synthInstance.answer] ✅️ IsSmooth fun g => g
[Meta.synthInstance.resume] propagating IsSmooth fun a =>
Expand Down
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