Frag5

type t
interpret t -> int

function f(X:t) : t

function foo(X:t) = f(X) = X

definition f(X) = X

function g(X:t) : t
var p : t

function h(X:t) : t
definition h(Z) =  Z
function bar(X:t) = f(X) = h(X)

var q : bool

axiom g(X) = f(X) if q else g(X)

result: OK