16 lines
575 B
Lua
16 lines
575 B
Lua
local env = bare_environment()
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env = add_decl(env, mk_var_decl("f", mk_arrow(Prop, mk_arrow(Prop, Prop))))
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local f = Const("f")
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local x = Local("x", Prop)
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local y = Local("y", Prop)
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local z = Local("z", Prop)
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local tc = type_checker(env)
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print(tc:whnf(Fun(x, f(x))))
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print(tc:whnf(Fun(x, y, f(x, y))))
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print(tc:whnf(Fun(x, y, f(Const("a"), y))))
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print(tc:whnf(Fun(z, x, y, f(z, y))))
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assert(tc:is_def_eq(f, Fun(x, f(x))))
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assert(tc:is_def_eq(f, Fun(x, y, f(x, y))))
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local A = Const("A")
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local a = Local("a", A)
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assert(tc:is_def_eq(Fun(a, a)(f), Fun(x, y, f(x, y))))
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