3e1fd06903
After this commit, a value of type 'expr' cannot be a reference to nullptr. This commit also fixes several bugs due to the use of 'null' expressions. TODO: do the same for kernel objects, sexprs, etc. Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
30 lines
805 B
Lua
30 lines
805 B
Lua
local hs = hypotheses()
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assert(is_hypotheses(hs))
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assert(hs:empty())
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assert(hs:is_nil())
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local hs = hypotheses("H1", Const("q"), hs)
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local hs = hypotheses("H2", Const("p"), hs)
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local n, p = hs:head()
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assert(n == name("H2"))
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assert(p == Const("p"))
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assert(not hs:empty())
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assert(hs:tail():tail():empty())
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for n, p in hs:pairs() do
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print(n, p)
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end
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assert(not pcall(function() hypotheses("H1", Const("q"), "H2", Const("p"), hs) end))
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assert(#hs == 2)
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assert(hs:size() == 2)
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local g = goal(hs, Const("p1"))
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assert(is_goal(g))
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print(g)
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assert(#(g:hypotheses()) == 2)
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assert(g:conclusion() == Const("p1"))
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assert(g:unique_name("H") == name("H"))
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assert(g:unique_name("H1") == name("H1", 1))
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print(g:pp())
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local opts = options()
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opts = opts:update(name("pp", "unicode"), false)
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print(opts)
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print(g:pp(opts))
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