d29530e1c4
more fixes Access components of constant structures Apply implicit typing to dummy args used in automatic array dimensions SELECTED_INT_KIND and SELECTED_REAL_KIND Finish SELECTED_{INT,REAL}_KIND and common cases of ALL()/ANY() Original-commit: flang-compiler/f18@e9f8e53e55 Reviewed-on: https://github.com/flang-compiler/f18/pull/472 Tree-same-pre-rewrite: false
201 lines
6.7 KiB
C++
201 lines
6.7 KiB
C++
// Copyright (c) 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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// Defines data structures to represent "characteristics" of Fortran
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// procedures and other entities as they are specified in section 15.3
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// of Fortran 2018.
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#ifndef FORTRAN_EVALUATE_CHARACTERISTICS_H_
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#define FORTRAN_EVALUATE_CHARACTERISTICS_H_
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#include "common.h"
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#include "expression.h"
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#include "shape.h"
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#include "type.h"
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#include "../common/Fortran.h"
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#include "../common/enum-set.h"
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#include "../common/idioms.h"
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#include "../common/indirection.h"
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#include "../semantics/symbol.h"
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#include <optional>
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#include <ostream>
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#include <variant>
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#include <vector>
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namespace Fortran::evaluate {
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class IntrinsicProcTable;
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}
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namespace Fortran::evaluate::characteristics {
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struct Procedure;
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}
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extern template class Fortran::common::Indirection<
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Fortran::evaluate::characteristics::Procedure, true>;
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namespace Fortran::evaluate::characteristics {
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class TypeAndShape {
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public:
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explicit TypeAndShape(DynamicType t) : type_{t} {}
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TypeAndShape(DynamicType t, int rank) : type_{t}, shape_(rank) {}
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TypeAndShape(DynamicType t, Shape &&s) : type_{t}, shape_{std::move(s)} {}
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DEFAULT_CONSTRUCTORS_AND_ASSIGNMENTS(TypeAndShape)
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DynamicType type() const { return type_; }
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const Shape &shape() const { return shape_; }
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bool operator==(const TypeAndShape &) const;
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bool IsAssumedRank() const { return isAssumedRank_; }
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int Rank() const { return GetRank(shape_); }
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bool IsCompatibleWith(
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parser::ContextualMessages &, const TypeAndShape &) const;
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static std::optional<TypeAndShape> Characterize(const semantics::Symbol &);
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static std::optional<TypeAndShape> Characterize(
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const semantics::ObjectEntityDetails &);
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static std::optional<TypeAndShape> Characterize(
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const semantics::ProcEntityDetails &);
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static std::optional<TypeAndShape> Characterize(
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const semantics::ProcInterface &);
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static std::optional<TypeAndShape> Characterize(
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const semantics::DeclTypeSpec &);
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template<typename A>
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static std::optional<TypeAndShape> Characterize(const A *p) {
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if (p != nullptr) {
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return Characterize(*p);
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} else {
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return std::nullopt;
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}
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}
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std::ostream &Dump(std::ostream &) const;
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private:
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void AcquireShape(const semantics::ObjectEntityDetails &);
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protected:
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DynamicType type_;
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Shape shape_;
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bool isAssumedRank_{false};
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};
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// 15.3.2.2
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struct DummyDataObject {
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ENUM_CLASS(Attr, Optional, Allocatable, Asynchronous, Contiguous, Value,
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Volatile, Pointer, Target)
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using Attrs = common::EnumSet<Attr, Attr_enumSize>;
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DEFAULT_CONSTRUCTORS_AND_ASSIGNMENTS(DummyDataObject)
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explicit DummyDataObject(const TypeAndShape &t) : type{t} {}
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explicit DummyDataObject(TypeAndShape &&t) : type{std::move(t)} {}
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explicit DummyDataObject(DynamicType t) : type{t} {}
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bool operator==(const DummyDataObject &) const;
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static std::optional<DummyDataObject> Characterize(const semantics::Symbol &);
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std::ostream &Dump(std::ostream &) const;
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TypeAndShape type;
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std::vector<Expr<SubscriptInteger>> coshape;
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common::Intent intent{common::Intent::Default};
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Attrs attrs;
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};
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// 15.3.2.3
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struct DummyProcedure {
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ENUM_CLASS(Attr, Pointer, Optional)
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DECLARE_CONSTRUCTORS_AND_ASSIGNMENTS(DummyProcedure)
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explicit DummyProcedure(Procedure &&);
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bool operator==(const DummyProcedure &) const;
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static std::optional<DummyProcedure> Characterize(
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const semantics::Symbol &, const IntrinsicProcTable &);
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std::ostream &Dump(std::ostream &) const;
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common::CopyableIndirection<Procedure> procedure;
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common::EnumSet<Attr, Attr_enumSize> attrs;
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};
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// 15.3.2.4
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struct AlternateReturn {
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bool operator==(const AlternateReturn &) const { return true; }
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std::ostream &Dump(std::ostream &) const;
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};
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// 15.3.2.1
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using DummyArgument =
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std::variant<DummyDataObject, DummyProcedure, AlternateReturn>;
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using DummyArguments = std::vector<DummyArgument>;
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bool IsOptional(const DummyArgument &);
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std::optional<DummyArgument> CharacterizeDummyArgument(
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const semantics::Symbol &, const IntrinsicProcTable &);
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// 15.3.3
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struct FunctionResult {
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ENUM_CLASS(Attr, Allocatable, Pointer, Contiguous)
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DECLARE_CONSTRUCTORS_AND_ASSIGNMENTS(FunctionResult)
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explicit FunctionResult(DynamicType);
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explicit FunctionResult(TypeAndShape &&);
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explicit FunctionResult(Procedure &&);
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~FunctionResult();
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bool operator==(const FunctionResult &) const;
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static std::optional<FunctionResult> Characterize(
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const Symbol &, const IntrinsicProcTable &);
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bool IsAssumedLengthCharacter() const;
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const Procedure *IsProcedurePointer() const {
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if (const auto *pp{
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std::get_if<common::CopyableIndirection<Procedure>>(&u)}) {
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return &pp->value();
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} else {
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return nullptr;
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}
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}
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const TypeAndShape *GetTypeAndShape() const {
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return std::get_if<TypeAndShape>(&u);
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}
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std::ostream &Dump(std::ostream &) const;
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common::EnumSet<Attr, Attr_enumSize> attrs;
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std::variant<TypeAndShape, common::CopyableIndirection<Procedure>> u;
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};
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// 15.3.1
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struct Procedure {
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ENUM_CLASS(Attr, Pure, Elemental, BindC, ImplicitInterface, NullPointer)
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using Attrs = common::EnumSet<Attr, Attr_enumSize>;
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Procedure(FunctionResult &&, DummyArguments &&, Attrs);
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Procedure(DummyArguments &&, Attrs); // for subroutines and NULL()
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DECLARE_CONSTRUCTORS_AND_ASSIGNMENTS(Procedure)
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bool operator==(const Procedure &) const;
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// Characterizes the procedure represented by a symbol, which may be an
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// "unrestricted specific intrinsic function".
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static std::optional<Procedure> Characterize(
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const semantics::Symbol &, const IntrinsicProcTable &);
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bool IsFunction() const { return functionResult.has_value(); }
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bool IsSubroutine() const { return !IsFunction(); }
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bool IsPure() const { return attrs.test(Attr::Pure); }
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bool IsElemental() const { return attrs.test(Attr::Elemental); }
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bool IsBindC() const { return attrs.test(Attr::BindC); }
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bool HasExplicitInterface() const {
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return !attrs.test(Attr::ImplicitInterface);
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}
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std::ostream &Dump(std::ostream &) const;
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std::optional<FunctionResult> functionResult;
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DummyArguments dummyArguments;
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Attrs attrs;
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private:
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Procedure() {}
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};
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}
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#endif // FORTRAN_EVALUATE_CHARACTERISTICS_H_
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