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2823795f9f
As part of making tuples first-class citizens, expliciting the arity upon function application was needed (so that a function of two args can transparently -- in the surface language -- be applied to either two arguments or a pair). It was decided to actually explicit the whole type of arguments because the cost is the same, and this is consistent with lambda definitions. A related change done here is the replacement of the `EOp` node for operators by an "operator application" `EAppOp` node, enforcing a pervasive invariant that operators are always directly applied. This makes matches terser, and highlights the fact that the treatment of operator application is almost always different from function application in practice.
109 lines
3.9 KiB
OCaml
109 lines
3.9 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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Louis Gesbert <louis.gesbert@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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open Shared_ast
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open Ast
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let expr ctx env e =
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(* The typer takes care of disambiguating: this consists in: - ensuring
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[EAbs.tys] doesn't contain any [TAny] - [EDStructAccess.name_opt] is always
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[Some] *)
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(* Intermediate unboxings are fine since the [check_expr] will rebox in
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depth *)
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Typing.check_expr ~leave_unresolved:false ctx ~env (Expr.unbox e)
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let rule ctx env rule =
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let env =
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match rule.rule_parameter with
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| None -> env
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| Some (vars_and_types, _) ->
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ListLabels.fold_right vars_and_types ~init:env ~f:(fun ((v, _), t) ->
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Typing.Env.add_var v t)
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in
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(* Note: we could use the known rule type here to direct typing. We choose not
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to because it shouldn't be needed for disambiguation, and we prefer to
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focus on local type errors first. *)
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{
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rule with
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rule_just = expr ctx env rule.rule_just;
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rule_cons = expr ctx env rule.rule_cons;
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}
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let scope ctx env scope =
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let env = Typing.Env.open_scope scope.scope_uid env in
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let scope_defs =
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ScopeDef.Map.map
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(fun def ->
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let scope_def_rules =
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(* Note: ordering in file order might be better for error reporting ?
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When we gather errors, the ordering could be done afterwards,
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though *)
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RuleName.Map.map (rule ctx env) def.scope_def_rules
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in
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{ def with scope_def_rules })
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scope.scope_defs
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in
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let scope_assertions =
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AssertionName.Map.map (expr ctx env) scope.scope_assertions
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in
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{ scope with scope_defs; scope_assertions }
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let program prg =
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(* Caution: this environment building code is very similar to that in
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scopelang/ast.ml. Any edits should probably be reflected. *)
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let env = Typing.Env.empty prg.program_ctx in
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let env =
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TopdefName.Map.fold
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(fun name ty env -> Typing.Env.add_toplevel_var name ty env)
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prg.program_ctx.ctx_topdefs env
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in
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let env =
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ScopeName.Map.fold
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(fun scope_name _info env ->
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let modul =
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List.fold_left
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(fun _ m -> ModuleName.Map.find m prg.program_modules)
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prg.program_root
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(ScopeName.path scope_name)
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in
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let scope = ScopeName.Map.find scope_name modul.module_scopes in
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let vars =
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ScopeDef.Map.fold
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(fun var def vars ->
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match var with
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| Var (v, _states) -> ScopeVar.Map.add v def.scope_def_typ vars
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| SubScopeVar _ -> vars)
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scope.scope_defs ScopeVar.Map.empty
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in
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(* at this stage, rule resolution and the corresponding encapsulation
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into default terms hasn't taken place, so input and output variables
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don't need different typing *)
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Typing.Env.add_scope scope_name ~vars ~in_vars:vars env)
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prg.program_ctx.ctx_scopes env
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in
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let module_topdefs =
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TopdefName.Map.map
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(function
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| Some e, ty ->
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Some (Expr.unbox (expr prg.program_ctx env (Expr.box e))), ty
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| None, ty -> None, ty)
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prg.program_root.module_topdefs
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in
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let module_scopes =
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ScopeName.Map.map (scope prg.program_ctx env) prg.program_root.module_scopes
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in
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{ prg with program_root = { module_topdefs; module_scopes } }
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