36 lines
593 B
OCaml
36 lines
593 B
OCaml
type var = Ix of int
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type 'a binder = B of 'a
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type term
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= Var of var
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| Type
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| T0
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| Ind0 of term binder * term
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| T1
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| T1tr (* Unit eta rule instead of elimination principle *)
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| TNat
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| Zero
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| Suc of term
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| IndN of term binder * term * term binder binder * term
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| TBool
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| True
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| False
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| IndB of term binder * term * term * term
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| Pi of term * term binder
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| Lam of term binder
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| App of term * term
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| Sg of term * term binder
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| Pair of term * term
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| Fst of term
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| Snd of term
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| Let of term * term * term binder (* tr : ty in sc *)
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