24eb863fda
Original-commit: flang-compiler/f18@79779967a9 Reviewed-on: https://github.com/flang-compiler/f18/pull/548
252 lines
8.7 KiB
C++
252 lines
8.7 KiB
C++
// Copyright (c) 2018-2019, 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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// So "delete Expr;" calls an external destructor for its typedExpr.
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namespace Fortran::evaluate {
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struct GenericExprWrapper {
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~GenericExprWrapper();
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};
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}
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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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// R873
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CommonStmt::CommonStmt(std::optional<Name> &&name,
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std::list<CommonBlockObject> &&objects, std::list<Block> &&others) {
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blocks.emplace_front(std::move(name), std::move(objects));
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blocks.splice(blocks.end(), std::move(others));
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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{
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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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},
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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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const std::optional<LoopControl> &DoConstruct::GetLoopControl() const {
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const NonLabelDoStmt &doStmt{
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std::get<Statement<NonLabelDoStmt>>(t).statement};
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const std::optional<LoopControl> &control{
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std::get<std::optional<LoopControl>>(doStmt.t)};
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return control;
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}
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bool DoConstruct::IsDoNormal() const {
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const std::optional<LoopControl> &control{GetLoopControl()};
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return control && std::holds_alternative<LoopControl::Bounds>(control->u);
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}
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bool DoConstruct::IsDoWhile() const {
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const std::optional<LoopControl> &control{GetLoopControl()};
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return control && std::holds_alternative<ScalarLogicalExpr>(control->u);
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}
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bool DoConstruct::IsDoConcurrent() const {
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const std::optional<LoopControl> &control{GetLoopControl()};
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return control && std::holds_alternative<LoopControl::Concurrent>(control->u);
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}
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static Designator MakeArrayElementRef(
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const Name &name, std::list<Expr> &&subscripts) {
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ArrayElement arrayElement{DataRef{Name{name}}, std::list<SectionSubscript>{}};
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for (Expr &expr : subscripts) {
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arrayElement.subscripts.push_back(
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SectionSubscript{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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static Designator MakeArrayElementRef(
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StructureComponent &&sc, std::list<Expr> &&subscripts) {
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ArrayElement arrayElement{DataRef{common::Indirection{std::move(sc)}},
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std::list<SectionSubscript>{}};
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for (Expr &expr : subscripts) {
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arrayElement.subscripts.push_back(
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SectionSubscript{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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// Set source in any type of node that has it.
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template<typename T> T WithSource(CharBlock source, T &&x) {
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x.source = source;
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return std::move(x);
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}
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static Expr ActualArgToExpr(ActualArgSpec &arg) {
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return std::visit(
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common::visitors{
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[&](common::Indirection<Expr> &y) { return std::move(y.value()); },
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[&](common::Indirection<Variable> &y) {
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return std::visit(
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common::visitors{
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[&](common::Indirection<Designator> &z) {
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return WithSource(
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z.value().source, Expr{std::move(z.value())});
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},
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[&](common::Indirection<FunctionReference> &z) {
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return WithSource(
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z.value().v.source, Expr{std::move(z.value())});
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},
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},
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y.value().u);
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},
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[&](auto &) -> Expr { common::die("unexpected type"); },
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},
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std::get<ActualArg>(arg.t).u);
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}
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Designator FunctionReference::ConvertToArrayElementRef() {
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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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args.emplace_back(ActualArgToExpr(arg));
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}
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return std::visit(
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common::visitors{
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[&](const Name &name) {
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return WithSource(
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v.source, MakeArrayElementRef(name, std::move(args)));
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},
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[&](ProcComponentRef &pcr) {
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return WithSource(v.source,
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MakeArrayElementRef(std::move(pcr.v.thing), std::move(args)));
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},
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},
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std::get<ProcedureDesignator>(v.t).u);
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}
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StructureConstructor FunctionReference::ConvertToStructureConstructor(
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const semantics::DerivedTypeSpec &derived) {
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Name name{std::get<parser::Name>(std::get<ProcedureDesignator>(v.t).u)};
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std::list<ComponentSpec> components;
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for (auto &arg : std::get<std::list<ActualArgSpec>>(v.t)) {
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std::optional<Keyword> keyword;
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if (auto &kw{std::get<std::optional<Keyword>>(arg.t)}) {
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keyword.emplace(Keyword{Name{kw->v}});
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}
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components.emplace_back(
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std::move(keyword), ComponentDataSource{ActualArgToExpr(arg)});
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}
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DerivedTypeSpec spec{std::move(name), std::list<TypeParamSpec>{}};
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spec.derivedTypeSpec = &derived;
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return StructureConstructor{std::move(spec), std::move(components)};
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}
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Substring ArrayElement::ConvertToSubstring() {
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auto iter{subscripts.begin()};
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CHECK(iter != subscripts.end());
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auto &triplet{std::get<SubscriptTriplet>(iter->u)};
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CHECK(!std::get<2>(triplet.t).has_value());
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CHECK(++iter == subscripts.end());
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return Substring{std::move(base),
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SubstringRange{std::get<0>(std::move(triplet.t)),
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std::get<1>(std::move(triplet.t))}};
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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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CharBlock source{funcName.source};
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std::list<Expr> subscripts;
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for (Name &arg : funcArgs) {
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subscripts.push_back(WithSource(arg.source,
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Expr{common::Indirection{
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WithSource(arg.source, Designator{DataRef{Name{arg}}})}}));
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source.ExtendToCover(arg.source);
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}
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// extend source to include closing paren
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if (funcArgs.empty()) {
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CHECK(*source.end() == '(');
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source = CharBlock{source.begin(), source.end() + 1};
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}
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CHECK(*source.end() == ')');
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source = CharBlock{source.begin(), source.end() + 1};
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auto variable{Variable{common::Indirection{WithSource(
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source, MakeArrayElementRef(funcName, std::move(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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CharBlock Variable::GetSource() const {
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return std::visit(
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common::visitors{
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[&](const common::Indirection<Designator> &des) {
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return des.value().source;
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},
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[&](const common::Indirection<parser::FunctionReference> &call) {
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return call.value().v.source;
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},
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},
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u);
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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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}
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template class std::unique_ptr<Fortran::evaluate::GenericExprWrapper>;
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