55 lines
1.9 KiB
Lua
55 lines
1.9 KiB
Lua
import("util.lua")
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local menv = metavar_env()
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assert(is_metavar_env(menv))
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local m1 = menv:mk_metavar()
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local m2 = menv:mk_metavar()
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print(m1, m2)
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assert(m1 ~= m2)
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assert(m1:is_metavar())
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assert(m2:is_metavar())
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assert(not menv:is_assigned(m1))
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assert(not menv:is_assigned(m2))
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local ctx = context():extend("x", Const("Int"))
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local m3 = menv:mk_metavar(ctx)
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local m4 = menv:mk_metavar(ctx, Const("Int"))
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assert(not menv:is_assigned(m3))
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assert(not menv:is_assigned(m4))
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local ts1 = menv:get_timestamp()
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local m5 = menv:mk_metavar()
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local ts2 = menv:get_timestamp()
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assert(ts2 > ts1)
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print(menv:get_context(m3))
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assert(menv:get_context(m3):size() == 1)
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assert(menv:get_context(m1):size() == 0)
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assert(menv:get_context{"M", 3}:size() == 1)
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assert(not menv:has_type(m3))
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assert(menv:has_type(m4))
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assert(menv:has_type(m4:fields()))
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assert(menv:get_type(m4) == Const("Int"))
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assert(menv:get_type(m4:fields()) == Const("Int"))
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local f, a, b = Consts("f, a, b")
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menv:assign(m1, f(a, b))
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assert(menv:is_assigned(m1))
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assert(menv:is_assigned(m1:fields()))
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local menv2 = menv:copy()
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local as = mk_assumption_justification(1)
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menv:assign(m2, f(a, a), as)
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assert(menv:is_assigned(m2))
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assert(menv:is_assigned(m2:fields()))
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assert(not menv2:is_assigned(m2))
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assert(not menv2:is_assigned(m2:fields()))
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assert(menv:get_justification(m1):is_null())
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assert(menv:get_justification(m1:fields()):is_null())
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assert(not menv:get_justification(m2):is_null())
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local s1, jst1 = menv:get_subst_jst(m1)
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assert(s1 == f(a, b))
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assert(jst1:is_null())
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local s2, jst2 = menv:get_subst_jst(m2)
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assert(s2 == f(a, a))
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assert(jst2:depends_on(as))
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assert(menv:get_subst(m1) == f(a, b))
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assert(menv:get_subst(m2:fields()) == f(a, a))
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local counter = 0
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menv:for_each_subst(function (m, s) print(m, s); counter = counter + 1 end)
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assert(counter == 2)
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assert(instantiate_metavars(f(m1, m2), menv) == f(f(a, b), f(a, a)))
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