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feat: use Kyle Miller's instance analysis algorithm #159

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Nov 5, 2023
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feat: use Kyle Miller's instance analysis algorithm #159

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16 changes: 10 additions & 6 deletions DocGen4/Process/InstanceInfo.lean
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Original file line number Diff line number Diff line change
Expand Up @@ -16,14 +16,18 @@ open Lean Meta
def getInstanceTypes (typ : Expr) : MetaM (Array Name) := do
let (_, _, tail) ← forallMetaTelescopeReducing typ
let args := tail.getAppArgs
let (_, names) ← args.mapM (Expr.forEach · findName) |>.run .empty
let (_, bis, _) ← forallMetaTelescopeReducing (← inferType tail.getAppFn)
let (_, names) ← (bis.zip args).mapM findName |>.run .empty
return names
where
findName : Expr → StateRefT (Array Name) MetaM Unit
| .const name _ => modify (·.push name)
| .sort .zero => modify (·.push "_builtin_prop")
| .sort (.succ _) => modify (·.push "_builtin_typeu")
| .sort _ => modify (·.push "_builtin_sortu")
findName : BinderInfo × Expr → StateRefT (Array Name) MetaM Unit
| (.default, .sort .zero) => modify (·.push "_builtin_prop")
| (.default, .sort (.succ _)) => modify (·.push "_builtin_typeu")
| (.default, .sort _) => modify (·.push "_builtin_sortu")
| (.default, e) =>
match e.getAppFn with
| .const name .. => modify (·.push name)
| _ => return ()
| _ => return ()

def InstanceInfo.ofDefinitionVal (v : DefinitionVal) : MetaM InstanceInfo := do
Expand Down