37476ee32e
Replace parser::ImportStmt::Kind and semantics::Scope::ImportKind with a single enum class in common/fortran.h. This eliminates the need to map between the parser enum and the semantics enum. Original-commit: flang-compiler/f18@779a99314c Reviewed-on: https://github.com/flang-compiler/f18/pull/167
129 lines
4.5 KiB
C++
129 lines
4.5 KiB
C++
// Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "parse-tree.h"
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#include "user-state.h"
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#include "../common/idioms.h"
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#include "../common/indirection.h"
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#include <algorithm>
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namespace Fortran::parser {
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// R867
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ImportStmt::ImportStmt(common::ImportKind &&k, std::list<Name> &&n)
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: kind{k}, names(std::move(n)) {
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CHECK(kind == common::ImportKind::Default ||
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kind == common::ImportKind::Only || names.empty());
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}
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// R901 designator
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bool Designator::EndsInBareName() const {
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return std::visit(
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common::visitors{[](const ObjectName &) { return true; },
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[](const DataRef &dr) {
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return std::holds_alternative<Name>(dr.u) ||
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std::holds_alternative<common::Indirection<StructureComponent>>(
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dr.u);
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},
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[](const Substring &) { return false; }},
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u);
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}
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// R911 data-ref -> part-ref [% part-ref]...
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DataRef::DataRef(std::list<PartRef> &&prl) : u{std::move(prl.front().name)} {
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for (bool first{true}; !prl.empty(); first = false, prl.pop_front()) {
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PartRef &pr{prl.front()};
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if (!first) {
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u = common::Indirection<StructureComponent>::Make(
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std::move(*this), std::move(pr.name));
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}
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if (!pr.subscripts.empty()) {
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u = common::Indirection<ArrayElement>::Make(
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std::move(*this), std::move(pr.subscripts));
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}
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if (pr.imageSelector.has_value()) {
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u = common::Indirection<CoindexedNamedObject>::Make(
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std::move(*this), std::move(*pr.imageSelector));
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}
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}
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}
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// R1001 - R1022 expression
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Expr::Expr(Designator &&x)
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: u{common::Indirection<Designator>::Make(std::move(x))} {}
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Expr::Expr(FunctionReference &&x)
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: u{common::Indirection<FunctionReference>::Make(std::move(x))} {}
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static Designator MakeArrayElementRef(Name &name, std::list<Expr> &subscripts) {
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ArrayElement arrayElement{name, std::list<SectionSubscript>{}};
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for (Expr &expr : subscripts) {
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arrayElement.subscripts.push_back(SectionSubscript{
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Scalar{Integer{common::Indirection{std::move(expr)}}}});
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}
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return Designator{DataRef{common::Indirection{std::move(arrayElement)}}};
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}
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Designator FunctionReference::ConvertToArrayElementRef() {
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auto &name{std::get<parser::Name>(std::get<ProcedureDesignator>(v.t).u)};
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std::list<Expr> args;
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for (auto &arg : std::get<std::list<ActualArgSpec>>(v.t)) {
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std::visit(
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common::visitors{
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[&](common::Indirection<Expr> &y) {
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args.push_back(std::move(*y));
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},
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[&](common::Indirection<Variable> &y) {
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args.push_back(std::visit(
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common::visitors{
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[&](common::Indirection<Designator> &z) {
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return Expr{std::move(*z)};
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},
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[&](common::Indirection<FunctionReference> &z) {
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return Expr{std::move(*z)};
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},
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},
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y->u));
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},
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[&](auto &) { CHECK(!"unexpected kind of ActualArg"); },
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},
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std::get<ActualArg>(arg.t).u);
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}
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return MakeArrayElementRef(name, args);
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}
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// R1544 stmt-function-stmt
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// Convert this stmt-function-stmt to an array element assignment statement.
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Statement<ActionStmt> StmtFunctionStmt::ConvertToAssignment() {
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auto &funcName{std::get<Name>(t)};
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auto &funcArgs{std::get<std::list<Name>>(t)};
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auto &funcExpr{std::get<Scalar<Expr>>(t).thing};
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std::list<Expr> subscripts;
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for (Name &arg : funcArgs) {
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subscripts.push_back(Expr{common::Indirection{Designator{arg}}});
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}
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auto variable{
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Variable{common::Indirection{MakeArrayElementRef(funcName, subscripts)}}};
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return Statement{std::nullopt,
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ActionStmt{common::Indirection{
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AssignmentStmt{std::move(variable), std::move(funcExpr)}}}};
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}
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std::ostream &operator<<(std::ostream &os, const Name &x) {
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return os << x.ToString();
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}
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std::ostream &operator<<(std::ostream &os, const CharBlock &x) {
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return os << x.ToString();
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}
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} // namespace Fortran::parser
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