def Lean.mkRecAppWithSyntax (e : Lean.Expr) (stx : Lean.Syntax) : Lean.Expr

We store the syntax at recursive applications to be able to generate better error messages when performing well-founded and structural recursion.

Equations

• Lean.mkRecAppWithSyntax e stx = Lean.mkMData (Lean.KVMap.empty.insert Lean.recAppKey (Lean.DataValue.ofSyntax stx)) e

def Lean.getRecAppSyntax? (e : Lean.Expr) : Option Lean.Syntax

Retrieve (if available) the syntax object attached to a recursive application.

Equations

• One or more equations did not get rendered due to their size.

def Lean.MData.isRecApp (d : Lean.MData) : Bool

Checks if the MData is for a recursive applciation.

Equations

• d.isRecApp = Lean.KVMap.contains d Lean.recAppKey