Documentation

Lean.Meta.ForEachExpr

def Lean.Meta.visitLambda {m : TypeType u_1} [Monad m] [MonadControlT Lean.MetaM m] (f : Lean.Exprm Unit) (e : Lean.Expr) :

Given an expression e = fun (x₁ : α₁) .. (xₙ : αₙ) => b, runs f on each αᵢ and b.

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      def Lean.Meta.visitForall {m : TypeType u_1} [Monad m] [MonadControlT Lean.MetaM m] (f : Lean.Exprm Unit) (e : Lean.Expr) :

      Given an expression e = (x₁ : α₁) → .. (xₙ : αₙ) → b, runs f on each αᵢ and b.

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          def Lean.Meta.visitLet {m : TypeType u_1} [Monad m] [MonadControlT Lean.MetaM m] (f : Lean.Exprm Unit) (e : Lean.Expr) :

          Given a sequence of let binders let (x₁ : α₁ := v₁) ... in b, runs f on each αᵢ, vᵢ and b.

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            • Lean.Meta.visitLet.visit f fvars x✝ = f (x✝.instantiateRev fvars)
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              Similar to Expr.forEach', but creates free variables whenever going inside of a binder. If the inner function returns false, deeper subexpressions will not be visited.

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                Similar to Expr.forEach, but creates free variables whenever going inside of a binder.

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                  Auxiliary method for (temporarily) setting the user facing name of metavariables. Let ?m be a metavariable in isTarget.contains ?m, and ?m does not have a user facing name. Then, we try to find an application f ... ?m in e, and (temporarily) use the corresponding parameter name (with a fresh macro scope) as the user facing name for ?m. This method returns all metavariables whose user facing name has been updated.

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                    Remove user facing name for metavariables in toReset. This a low-level method for "undoing" the effect of setMVarUserNamesAt

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                      Similar to mkForallFVars, but tries to infer better binder names when xs contains metavariables. Let ?m be a metavariable in xs s.t. ?m does not have a user facing name. Then, we try to find an application f ... ?m in the other binder typer and type, and (temporarily) use the corresponding parameter name (with a fresh macro scope) as the user facing name for ?m. The "renaming" is temporary.

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