12 lines
387 B
Lua
12 lines
387 B
Lua
|
local a = Const("a")
|
||
|
|
local f = Const("f")
|
||
|
|
local x = Var(0)
|
||
|
|
assert(not f(a):has_free_var(0))
|
||
|
|
assert(f(a, x):has_free_var(0))
|
||
|
|
assert(not f(a, x):has_free_var(1, 3))
|
||
|
|
assert(f(a, Var(1)):has_free_var(1, 3))
|
||
|
|
assert(f(a, Var(2)):has_free_var(1, 3))
|
||
|
|
assert(not f(a, Var(3)):has_free_var(1, 3))
|
||
|
|
assert(not f(a, Var(4)):has_free_var(1, 3))
|
||
|
|
assert(f(a, Var(2)):lower_free_vars(2) == f(a, Var(0)))
|