23 lines
955 B
Lua
23 lines
955 B
Lua
local env = environment()
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local l = param_univ("l")
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local Ul = mk_sort(l)
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local lst_l = Const("lst", {l})
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local A = Local("A", Ul)
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env = add_decl(env, mk_constant_assumption("lst", {l}, mk_arrow(Ul, Ul)))
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env = add_decl(env, mk_constant_assumption("lst2lst", {l}, Pi(A, mk_arrow(lst_l(A), lst_l(A)))))
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env = add_decl(env, mk_constant_assumption("head", {l}, Pi(A, mk_arrow(lst_l(A), A))))
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env = add_decl(env, mk_constant_assumption("id", {l}, Pi(A, mk_arrow(A, A))))
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function add_bad_coercion(env, c)
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ok, msg = pcall(function() add_coercion(env, c) end)
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assert(not ok)
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print("Expected error: " .. tostring(msg:what()))
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end
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function add_bad_coercion2(env, c, cls)
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ok, msg = pcall(function() add_coercion(env, c, cls) end)
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assert(not ok)
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print("Expected error: " .. tostring(msg:what()))
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end
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add_bad_coercion(env, "lst2lst")
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add_bad_coercion(env, "head")
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add_bad_coercion(env, "id")
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add_bad_coercion2(env, "head", "lst")
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