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44 lines
2.1 KiB
OCaml
44 lines
2.1 KiB
OCaml
(* This file is part of the Catala compiler, a specification language for tax
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and social benefits computation rules. Copyright (C) 2020 Inria, contributor:
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Alain Delaët <alain.delaet--tixeuil@inria.fr>
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Licensed under the Apache License, Version 2.0 (the "License"); you may not
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use this file except in compliance with the License. You may obtain a copy of
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the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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License for the specific language governing permissions and limitations under
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the License. *)
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(** This file makes explicit few structural invariants of the dcalc asbtract
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syntax tree. Those invariants have been checked on all tests and examples of
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catala. The behavior of the compiler on programs that don't follow those
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invariant in undefined. *)
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open Shared_ast
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open Ast
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val check_all_invariants : typed program -> bool
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(** Check all invariants. Return true if all the invariants are correct. Print
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errors messages for each unsucessfull invariants. Here are all the
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invariants checked:
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- [invariant_default_no_arrow] check no default term has a function type.
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- [invariant_no_partial_evaluation] check there is no partial function.
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- [invariant_no_return_a_function] check no function return a function.
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- [invariant_app_inversion] : if the term is an function application, then
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there is only 6 possibility : it is a let binding, it is an operator
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application, it is an variable application, it is a struct access function
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application (sub-scope call), it is a operator application with trace, or
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an external function.
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- [invariant_match_inversion] : if a term is a match, then every branch is
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an function abstraction.
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- [invariant_typing_default]: the type TDefault can only appear in some
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positions.
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The function prints as a side effect the different errors.*)
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