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19 lines
682 B
19 lines
682 B
5 years ago
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(*
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* Copyright (c) 2009-2013, Monoidics ltd.
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*)
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open! IStd
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(** {2 Subtype checking} *)
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val check_subtype : Tenv.t -> Typ.t -> Typ.t -> bool
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(** check_subtype t1 t2 checks whether t1 is a subtype of t2, given the type environment tenv. *)
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val subtype_case_analysis : Tenv.t -> Exp.t -> Exp.t -> Exp.t option * Exp.t option
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(** subtype_case_analysis tenv tecp1 texp2 performs case analysis on [texp1 <: texp2], and returns
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the updated types in the true and false case, if they are possible *)
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