2018-06-18 21:09:56 +02:00
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// 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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#ifndef FORTRAN_EVALUATE_EXPRESSION_H_
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#define FORTRAN_EVALUATE_EXPRESSION_H_
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2018-06-22 20:02:54 +02:00
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// Represent Fortran expressions in a type-safe manner.
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2018-06-22 22:40:56 +02:00
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// Expressions are the sole owners of their constituents; i.e., there is no
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2018-09-12 20:20:30 +02:00
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// context-independent hash table or sharing of common subexpressions, and
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// thus these are trees, not DAGs. Both deep copy and move semantics are
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// supported for expression construction.
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2018-06-22 20:02:54 +02:00
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2018-06-19 23:16:01 +02:00
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#include "common.h"
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2018-06-18 21:09:56 +02:00
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#include "type.h"
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2018-07-07 00:12:33 +02:00
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#include "variable.h"
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2018-08-17 18:50:32 +02:00
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#include "../lib/common/fortran.h"
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2018-07-05 23:19:19 +02:00
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#include "../lib/common/idioms.h"
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2018-09-15 00:48:40 +02:00
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#include "../lib/common/template.h"
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2018-06-22 23:51:15 +02:00
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#include "../lib/parser/char-block.h"
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#include "../lib/parser/message.h"
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2018-10-24 01:48:06 +02:00
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#include <algorithm>
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2018-06-20 20:55:10 +02:00
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#include <ostream>
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2018-08-15 22:46:33 +02:00
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#include <tuple>
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2018-08-29 00:15:18 +02:00
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#include <type_traits>
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2018-06-18 21:09:56 +02:00
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#include <variant>
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namespace Fortran::evaluate {
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2018-08-17 18:50:32 +02:00
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using common::RelationalOperator;
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2018-09-08 00:25:10 +02:00
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// Expressions are represented by specializations of the class template Expr.
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2018-08-29 00:15:18 +02:00
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// Each of these specializations wraps a single data member "u" that
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2018-09-08 00:25:10 +02:00
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// is a std::variant<> discriminated union over all of the representational
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2018-08-29 01:35:45 +02:00
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// types for the constants, variables, operations, and other entities that
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2018-08-29 00:15:18 +02:00
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// can be valid expressions in that context:
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2018-09-08 00:25:10 +02:00
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// - Expr<Type<CATEGORY, KIND>> represents an expression whose result is of a
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2018-08-29 00:15:18 +02:00
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// specific intrinsic type category and kind, e.g. Type<TypeCategory::Real, 4>
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// - Expr<SomeDerived> wraps data and procedure references that result in an
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// instance of a derived type
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// - Expr<SomeKind<CATEGORY>> is a union of Expr<Type<CATEGORY, K>> for each
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2018-09-08 00:25:10 +02:00
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// kind type parameter value K in that intrinsic type category. It represents
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// an expression with known category and any kind.
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// - Expr<SomeType> is a union of Expr<SomeKind<CATEGORY>> over the five
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// intrinsic type categories of Fortran. It represents any valid expression.
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//
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// Everything that can appear in, or as, a valid Fortran expression must be
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// represented with an instance of some class containing a Result typedef that
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// maps to some instantiation of Type<CATEGORY, KIND>, SomeKind<CATEGORY>,
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// or SomeType.
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2018-08-20 18:29:08 +02:00
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template<typename A> using ResultType = typename std::decay_t<A>::Result;
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2018-10-30 20:44:09 +01:00
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// Common Expr<> behaviors: every Expr<T> derives from ExpressionBase<T>.
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template<typename RESULT> class ExpressionBase {
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public:
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using Result = RESULT;
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private:
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using Derived = Expr<Result>;
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Derived &derived() { return *static_cast<Derived *>(this); }
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const Derived &derived() const { return *static_cast<const Derived *>(this); }
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public:
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template<typename A> Derived &operator=(const A &x) {
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Derived &d{derived()};
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d.u = x;
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return d;
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}
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template<typename A>
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Derived &operator=(std::enable_if_t<!std::is_reference_v<A>, A> &&x) {
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Derived &d{derived()};
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d.u = std::move(x);
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return d;
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}
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std::optional<DynamicType> GetType() const;
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int Rank() const;
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std::ostream &Dump(std::ostream &) const;
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static Derived Rewrite(FoldingContext &, Derived &&);
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};
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2018-09-05 01:42:32 +02:00
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// BOZ literal "typeless" constants must be wide enough to hold a numeric
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2018-09-06 02:12:03 +02:00
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// value of any supported kind of INTEGER or REAL. They must also be
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// distinguishable from other integer constants, since they are permitted
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// to be used in only a few situations.
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using BOZLiteralConstant = typename LargestReal::Scalar::Word;
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2018-09-01 01:14:14 +02:00
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2018-09-07 19:33:32 +02:00
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// Operations always have specific Fortran result types (i.e., with known
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// intrinsic type category and kind parameter value). The classes that
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// represent the operations all inherit from this Operation<> base class
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// template. Note that Operation has as its first type parameter (DERIVED) a
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// "curiously reoccurring template pattern (CRTP)" reference to the specific
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// operation class being derived from Operation; e.g., Add is defined with
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// struct Add : public Operation<Add, ...>. Uses of instances of Operation<>,
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// including its own member functions, can access each specific class derived
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// from it via its derived() member function with compile-time type safety.
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template<typename DERIVED, typename RESULT, typename... OPERANDS>
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class Operation {
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// The extra "int" member is a dummy that allows a safe unused reference
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// to element 1 to arise indirectly in the definition of "right()" below
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// when the operation has but a single operand.
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using OperandTypes = std::tuple<OPERANDS..., int>;
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2018-08-15 22:46:33 +02:00
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public:
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using Derived = DERIVED;
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using Result = RESULT;
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2018-10-09 21:07:29 +02:00
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static_assert(Result::isSpecificIntrinsicType);
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static constexpr std::size_t operands{sizeof...(OPERANDS)};
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template<int J> using Operand = std::tuple_element_t<J, OperandTypes>;
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2018-08-29 00:15:18 +02:00
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// Unary operations wrap a single Expr with a CopyableIndirection.
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// Binary operations wrap a tuple of CopyableIndirections to Exprs.
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private:
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using Container =
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std::conditional_t<operands == 1, CopyableIndirection<Expr<Operand<0>>>,
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std::tuple<CopyableIndirection<Expr<OPERANDS>>...>>;
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2018-08-16 20:46:18 +02:00
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2018-08-29 00:15:18 +02:00
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public:
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CLASS_BOILERPLATE(Operation)
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explicit Operation(const Expr<OPERANDS> &... x) : operand_{x...} {}
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explicit Operation(Expr<OPERANDS> &&... x)
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: operand_{std::forward<Expr<OPERANDS>>(x)...} {}
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Derived &derived() { return *static_cast<Derived *>(this); }
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const Derived &derived() const { return *static_cast<const Derived *>(this); }
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2018-09-07 19:33:32 +02:00
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// References to operand expressions from member functions of derived
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// classes for specific operators can be made by index, e.g. operand<0>(),
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// which must be spelled like "this->template operand<0>()" when
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// inherited in a derived class template. There are convenience aliases
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// left() and right() that are not templates.
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template<int J> Expr<Operand<J>> &operand() {
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if constexpr (operands == 1) {
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static_assert(J == 0);
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return *operand_;
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} else {
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return *std::get<J>(operand_);
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}
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}
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template<int J> const Expr<Operand<J>> &operand() const {
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if constexpr (operands == 1) {
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static_assert(J == 0);
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return *operand_;
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} else {
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return *std::get<J>(operand_);
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}
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}
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2018-09-07 19:33:32 +02:00
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Expr<Operand<0>> &left() { return operand<0>(); }
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const Expr<Operand<0>> &left() const { return operand<0>(); }
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std::conditional_t<(operands > 1), Expr<Operand<1>> &, void> right() {
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if constexpr (operands > 1) {
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return operand<1>();
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}
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}
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std::conditional_t<(operands > 1), const Expr<Operand<1>> &, void>
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right() const {
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if constexpr (operands > 1) {
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return operand<1>();
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}
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}
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2018-10-09 00:35:19 +02:00
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static constexpr std::optional<DynamicType> GetType() {
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return Result::GetType();
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}
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2018-09-18 18:34:59 +02:00
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int Rank() const {
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int rank{left().Rank()};
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if constexpr (operands > 1) {
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2018-10-24 01:48:06 +02:00
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return std::max(rank, right().Rank());
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} else {
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return rank;
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2018-09-18 18:34:59 +02:00
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}
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}
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2018-08-17 18:50:32 +02:00
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std::ostream &Dump(std::ostream &) const;
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2018-08-15 22:46:33 +02:00
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protected:
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2018-09-07 19:33:32 +02:00
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// Overridable functions for Dump()
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static std::ostream &Prefix(std::ostream &o) { return o << '('; }
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static std::ostream &Infix(std::ostream &o) { return o << ','; }
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static std::ostream &Suffix(std::ostream &o) { return o << ')'; }
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2018-08-15 22:46:33 +02:00
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private:
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Container operand_;
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};
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2018-08-17 18:50:32 +02:00
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// Unary operations
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2018-09-07 19:33:32 +02:00
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// Conversions to specific types from expressions of known category and
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// dynamic kind.
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2018-08-29 00:15:18 +02:00
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template<typename TO, TypeCategory FROMCAT>
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struct Convert : public Operation<Convert<TO, FROMCAT>, TO, SomeKind<FROMCAT>> {
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// Fortran doesn't have conversions between kinds of CHARACTER.
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// Conversions between kinds of COMPLEX are represented piecewise.
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static_assert(((TO::category == TypeCategory::Integer ||
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TO::category == TypeCategory::Real) &&
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(FROMCAT == TypeCategory::Integer ||
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FROMCAT == TypeCategory::Real)) ||
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(TO::category == TypeCategory::Logical &&
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FROMCAT == TypeCategory::Logical));
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using Result = TO;
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using Operand = SomeKind<FROMCAT>;
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using Base = Operation<Convert, Result, Operand>;
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using Base::Base;
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std::ostream &Dump(std::ostream &) const;
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};
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2018-08-15 22:46:33 +02:00
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template<typename A>
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struct Parentheses : public Operation<Parentheses<A>, A, A> {
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using Result = A;
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using Operand = A;
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using Base = Operation<Parentheses, A, A>;
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using Base::Base;
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};
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2018-08-16 20:46:18 +02:00
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template<typename A> struct Negate : public Operation<Negate<A>, A, A> {
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using Result = A;
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using Operand = A;
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using Base = Operation<Negate, A, A>;
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2018-08-15 22:46:33 +02:00
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using Base::Base;
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2018-09-07 19:33:32 +02:00
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static std::ostream &Prefix(std::ostream &o) { return o << "(-"; }
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};
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2018-08-17 18:50:32 +02:00
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template<int KIND>
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struct ComplexComponent
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: public Operation<ComplexComponent<KIND>, Type<TypeCategory::Real, KIND>,
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Type<TypeCategory::Complex, KIND>> {
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using Result = Type<TypeCategory::Real, KIND>;
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using Operand = Type<TypeCategory::Complex, KIND>;
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using Base = Operation<ComplexComponent, Result, Operand>;
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CLASS_BOILERPLATE(ComplexComponent)
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2018-08-23 19:55:16 +02:00
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ComplexComponent(bool isImaginary, const Expr<Operand> &x)
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: Base{x}, isImaginaryPart{isImaginary} {}
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ComplexComponent(bool isImaginary, Expr<Operand> &&x)
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: Base{std::move(x)}, isImaginaryPart{isImaginary} {}
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2018-09-07 19:33:32 +02:00
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std::ostream &Suffix(std::ostream &o) const {
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return o << (isImaginaryPart ? "%IM)" : "%RE)");
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}
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2018-08-23 19:55:16 +02:00
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bool isImaginaryPart{true};
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};
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template<int KIND>
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struct Not : public Operation<Not<KIND>, Type<TypeCategory::Logical, KIND>,
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Type<TypeCategory::Logical, KIND>> {
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using Result = Type<TypeCategory::Logical, KIND>;
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using Operand = Result;
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using Base = Operation<Not, Result, Operand>;
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2018-08-18 00:38:37 +02:00
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using Base::Base;
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2018-09-07 19:33:32 +02:00
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static std::ostream &Prefix(std::ostream &o) { return o << "(.NOT."; }
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};
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// Binary operations
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template<typename A> struct Add : public Operation<Add<A>, A, A, A> {
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using Result = A;
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using Operand = A;
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using Base = Operation<Add, A, A, A>;
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using Base::Base;
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2018-09-07 19:33:32 +02:00
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static std::ostream &Infix(std::ostream &o) { return o << '+'; }
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};
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template<typename A> struct Subtract : public Operation<Subtract<A>, A, A, A> {
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2018-08-29 00:15:18 +02:00
|
|
|
using Result = A;
|
|
|
|
using Operand = A;
|
2018-08-18 00:38:37 +02:00
|
|
|
using Base = Operation<Subtract, A, A, A>;
|
|
|
|
using Base::Base;
|
2018-09-07 19:33:32 +02:00
|
|
|
static std::ostream &Infix(std::ostream &o) { return o << '-'; }
|
2018-06-22 20:02:54 +02:00
|
|
|
};
|
|
|
|
|
2018-08-18 00:38:37 +02:00
|
|
|
template<typename A> struct Multiply : public Operation<Multiply<A>, A, A, A> {
|
2018-08-29 00:15:18 +02:00
|
|
|
using Result = A;
|
|
|
|
using Operand = A;
|
2018-08-18 00:38:37 +02:00
|
|
|
using Base = Operation<Multiply, A, A, A>;
|
|
|
|
using Base::Base;
|
2018-09-07 19:33:32 +02:00
|
|
|
static std::ostream &Infix(std::ostream &o) { return o << '*'; }
|
2018-08-18 00:38:37 +02:00
|
|
|
};
|
2018-07-20 21:19:09 +02:00
|
|
|
|
2018-08-18 00:38:37 +02:00
|
|
|
template<typename A> struct Divide : public Operation<Divide<A>, A, A, A> {
|
2018-08-29 00:15:18 +02:00
|
|
|
using Result = A;
|
|
|
|
using Operand = A;
|
2018-08-18 00:38:37 +02:00
|
|
|
using Base = Operation<Divide, A, A, A>;
|
|
|
|
using Base::Base;
|
2018-09-07 19:33:32 +02:00
|
|
|
static std::ostream &Infix(std::ostream &o) { return o << '/'; }
|
2018-08-18 00:38:37 +02:00
|
|
|
};
|
|
|
|
|
|
|
|
template<typename A> struct Power : public Operation<Power<A>, A, A, A> {
|
2018-08-29 00:15:18 +02:00
|
|
|
using Result = A;
|
|
|
|
using Operand = A;
|
2018-08-18 00:38:37 +02:00
|
|
|
using Base = Operation<Power, A, A, A>;
|
|
|
|
using Base::Base;
|
2018-09-07 19:33:32 +02:00
|
|
|
static std::ostream &Infix(std::ostream &o) { return o << "**"; }
|
2018-08-18 00:38:37 +02:00
|
|
|
};
|
|
|
|
|
2018-08-29 00:15:18 +02:00
|
|
|
template<typename A>
|
|
|
|
struct RealToIntPower : public Operation<RealToIntPower<A>, A, A, SomeInteger> {
|
|
|
|
using Base = Operation<RealToIntPower, A, A, SomeInteger>;
|
|
|
|
using Result = A;
|
|
|
|
using BaseOperand = A;
|
|
|
|
using ExponentOperand = SomeInteger;
|
2018-08-18 00:38:37 +02:00
|
|
|
using Base::Base;
|
2018-09-07 19:33:32 +02:00
|
|
|
static std::ostream &Infix(std::ostream &o) { return o << "**"; }
|
2018-08-18 00:38:37 +02:00
|
|
|
};
|
|
|
|
|
|
|
|
template<typename A> struct Extremum : public Operation<Extremum<A>, A, A, A> {
|
2018-08-29 00:15:18 +02:00
|
|
|
using Result = A;
|
|
|
|
using Operand = A;
|
2018-08-18 00:38:37 +02:00
|
|
|
using Base = Operation<Extremum, A, A, A>;
|
|
|
|
CLASS_BOILERPLATE(Extremum)
|
|
|
|
Extremum(const Expr<Operand> &x, const Expr<Operand> &y,
|
|
|
|
Ordering ord = Ordering::Greater)
|
|
|
|
: Base{x, y}, ordering{ord} {}
|
|
|
|
Extremum(
|
|
|
|
Expr<Operand> &&x, Expr<Operand> &&y, Ordering ord = Ordering::Greater)
|
|
|
|
: Base{std::move(x), std::move(y)}, ordering{ord} {}
|
|
|
|
|
2018-09-07 19:33:32 +02:00
|
|
|
std::ostream &Prefix(std::ostream &o) const {
|
|
|
|
return o << (ordering == Ordering::Less ? "MIN(" : "MAX(");
|
2018-08-18 00:38:37 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
Ordering ordering{Ordering::Greater};
|
|
|
|
};
|
|
|
|
|
|
|
|
template<int KIND>
|
|
|
|
struct ComplexConstructor
|
|
|
|
: public Operation<ComplexConstructor<KIND>,
|
|
|
|
Type<TypeCategory::Complex, KIND>, Type<TypeCategory::Real, KIND>,
|
|
|
|
Type<TypeCategory::Real, KIND>> {
|
2018-08-29 00:15:18 +02:00
|
|
|
using Result = Type<TypeCategory::Complex, KIND>;
|
|
|
|
using Operand = Type<TypeCategory::Real, KIND>;
|
|
|
|
using Base = Operation<ComplexConstructor, Result, Operand, Operand>;
|
2018-08-18 00:38:37 +02:00
|
|
|
using Base::Base;
|
|
|
|
};
|
|
|
|
|
|
|
|
template<int KIND>
|
|
|
|
struct Concat
|
|
|
|
: public Operation<Concat<KIND>, Type<TypeCategory::Character, KIND>,
|
|
|
|
Type<TypeCategory::Character, KIND>,
|
|
|
|
Type<TypeCategory::Character, KIND>> {
|
2018-08-29 00:15:18 +02:00
|
|
|
using Result = Type<TypeCategory::Character, KIND>;
|
|
|
|
using Operand = Result;
|
|
|
|
using Base = Operation<Concat, Result, Operand, Operand>;
|
2018-08-18 00:38:37 +02:00
|
|
|
using Base::Base;
|
2018-09-07 19:33:32 +02:00
|
|
|
static std::ostream &Infix(std::ostream &o) { return o << "//"; }
|
2018-08-18 00:38:37 +02:00
|
|
|
};
|
|
|
|
|
2018-11-01 20:39:09 +01:00
|
|
|
// TODO: Once the symbol table supports compiler temporaries,
|
|
|
|
// just put the literal string into one and use a regular Substring.
|
2018-11-01 19:18:12 +01:00
|
|
|
template<int KIND>
|
|
|
|
struct LiteralSubstring : public Operation<LiteralSubstring<KIND>,
|
|
|
|
Type<TypeCategory::Character, KIND>,
|
|
|
|
SubscriptInteger, SubscriptInteger> {
|
|
|
|
using Result = Type<TypeCategory::Character, KIND>;
|
|
|
|
using Operand = SubscriptInteger;
|
|
|
|
using String = Scalar<Result>;
|
|
|
|
using Base = Operation<LiteralSubstring, Result, Operand, Operand>;
|
|
|
|
LiteralSubstring(
|
|
|
|
const String &s, const Expr<Operand> &lower, const Expr<Operand> &upper)
|
|
|
|
: string{s}, Base{lower, upper} {}
|
|
|
|
LiteralSubstring(String &&s, Expr<Operand> &&lower, Expr<Operand> &&upper)
|
|
|
|
: Base{std::move(lower), std::move(upper)}, string{std::move(s)} {}
|
|
|
|
|
|
|
|
std::ostream &Prefix(std::ostream &) const;
|
|
|
|
Expr<SubscriptInteger> LEN() const;
|
|
|
|
String string;
|
|
|
|
};
|
|
|
|
|
2018-08-18 00:38:37 +02:00
|
|
|
ENUM_CLASS(LogicalOperator, And, Or, Eqv, Neqv)
|
|
|
|
|
|
|
|
template<int KIND>
|
|
|
|
struct LogicalOperation
|
|
|
|
: public Operation<LogicalOperation<KIND>, Type<TypeCategory::Logical, KIND>,
|
|
|
|
Type<TypeCategory::Logical, KIND>, Type<TypeCategory::Logical, KIND>> {
|
2018-08-29 00:15:18 +02:00
|
|
|
using Result = Type<TypeCategory::Logical, KIND>;
|
|
|
|
using Operand = Result;
|
|
|
|
using Base = Operation<LogicalOperation, Result, Operand, Operand>;
|
2018-08-18 00:38:37 +02:00
|
|
|
CLASS_BOILERPLATE(LogicalOperation)
|
|
|
|
LogicalOperation(
|
2018-09-08 00:25:10 +02:00
|
|
|
LogicalOperator opr, const Expr<Operand> &x, const Expr<Operand> &y)
|
2018-08-18 00:38:37 +02:00
|
|
|
: Base{x, y}, logicalOperator{opr} {}
|
2018-09-08 00:25:10 +02:00
|
|
|
LogicalOperation(LogicalOperator opr, Expr<Operand> &&x, Expr<Operand> &&y)
|
2018-08-18 00:38:37 +02:00
|
|
|
: Base{std::move(x), std::move(y)}, logicalOperator{opr} {}
|
|
|
|
|
2018-09-07 19:33:32 +02:00
|
|
|
std::ostream &Infix(std::ostream &) const;
|
2018-08-18 00:38:37 +02:00
|
|
|
|
|
|
|
LogicalOperator logicalOperator;
|
2018-06-22 20:02:54 +02:00
|
|
|
};
|
|
|
|
|
2018-10-30 23:24:35 +01:00
|
|
|
// Array constructors
|
|
|
|
|
|
|
|
template<typename RESULT> struct ArrayConstructorValues;
|
|
|
|
|
2018-11-01 20:39:09 +01:00
|
|
|
template<typename VALUES, typename OPERAND> struct ImpliedDo {
|
|
|
|
using Values = VALUES;
|
2018-10-30 23:24:35 +01:00
|
|
|
using Operand = OPERAND;
|
2018-11-01 20:39:09 +01:00
|
|
|
using Result = ResultType<Values>;
|
2018-10-30 23:24:35 +01:00
|
|
|
static_assert(Operand::category == TypeCategory::Integer);
|
|
|
|
parser::CharBlock controlVariableName;
|
|
|
|
CopyableIndirection<Expr<Operand>> lower, upper, stride;
|
2018-11-01 20:39:09 +01:00
|
|
|
CopyableIndirection<Values> values;
|
2018-10-30 23:24:35 +01:00
|
|
|
};
|
|
|
|
|
|
|
|
template<typename RESULT> struct ArrayConstructorValue {
|
|
|
|
using Result = RESULT;
|
|
|
|
EVALUATE_UNION_CLASS_BOILERPLATE(ArrayConstructorValue)
|
|
|
|
template<typename INT>
|
|
|
|
using ImpliedDo = ImpliedDo<ArrayConstructorValues<Result>, INT>;
|
|
|
|
common::CombineVariants<std::variant<CopyableIndirection<Expr<Result>>>,
|
|
|
|
common::MapTemplate<ImpliedDo, IntegerTypes>>
|
|
|
|
u;
|
|
|
|
};
|
|
|
|
|
|
|
|
template<typename RESULT> struct ArrayConstructorValues {
|
|
|
|
using Result = RESULT;
|
|
|
|
CLASS_BOILERPLATE(ArrayConstructorValues)
|
|
|
|
template<typename A> void Push(A &&x) { values.emplace_back(std::move(x)); }
|
|
|
|
std::vector<ArrayConstructorValue<Result>> values;
|
|
|
|
};
|
|
|
|
|
|
|
|
template<typename RESULT>
|
|
|
|
struct ArrayConstructor : public ArrayConstructorValues<RESULT> {
|
|
|
|
using Result = RESULT;
|
|
|
|
using ArrayConstructorValues<Result>::ArrayConstructorValues;
|
2018-10-31 00:25:10 +01:00
|
|
|
DynamicType GetType() const;
|
2018-10-30 23:24:35 +01:00
|
|
|
static constexpr int Rank() { return 1; }
|
2018-10-31 00:25:10 +01:00
|
|
|
Expr<SubscriptInteger> LEN() const;
|
2018-10-30 23:24:35 +01:00
|
|
|
std::ostream &Dump(std::ostream &) const;
|
2018-11-01 20:39:09 +01:00
|
|
|
|
|
|
|
Result result;
|
|
|
|
std::vector<Expr<SubscriptInteger>> typeParameterValues;
|
2018-10-30 23:24:35 +01:00
|
|
|
};
|
|
|
|
|
2018-09-08 00:25:10 +02:00
|
|
|
// Per-category expression representations
|
2018-07-20 21:19:09 +02:00
|
|
|
|
2018-08-29 00:15:18 +02:00
|
|
|
template<int KIND>
|
|
|
|
class Expr<Type<TypeCategory::Integer, KIND>>
|
|
|
|
: public ExpressionBase<Type<TypeCategory::Integer, KIND>> {
|
2018-07-12 01:36:43 +02:00
|
|
|
public:
|
2018-08-01 18:45:59 +02:00
|
|
|
using Result = Type<TypeCategory::Integer, KIND>;
|
2018-07-09 21:46:51 +02:00
|
|
|
// TODO: R916 type-param-inquiry
|
2018-06-18 21:09:56 +02:00
|
|
|
|
2018-09-15 00:48:40 +02:00
|
|
|
EVALUATE_UNION_CLASS_BOILERPLATE(Expr)
|
2018-09-13 01:27:51 +02:00
|
|
|
explicit Expr(const Scalar<Result> &x) : u{Constant<Result>{x}} {}
|
2018-10-11 00:27:17 +02:00
|
|
|
template<typename INT>
|
|
|
|
explicit Expr(std::enable_if_t<std::is_integral_v<INT>, INT> n)
|
|
|
|
: u{Constant<Result>{n}} {}
|
2018-06-21 21:47:28 +02:00
|
|
|
|
2018-07-12 01:36:43 +02:00
|
|
|
private:
|
2018-10-11 00:27:17 +02:00
|
|
|
using Conversions = std::variant<Convert<Result, TypeCategory::Integer>,
|
|
|
|
Convert<Result, TypeCategory::Real>>;
|
|
|
|
using Operations = std::variant<Parentheses<Result>, Negate<Result>,
|
|
|
|
Add<Result>, Subtract<Result>, Multiply<Result>, Divide<Result>,
|
|
|
|
Power<Result>, Extremum<Result>>;
|
2018-10-30 23:24:35 +01:00
|
|
|
using Others = std::variant<Constant<Result>, ArrayConstructor<Result>,
|
|
|
|
Designator<Result>, FunctionRef<Result>>;
|
2018-08-29 00:15:18 +02:00
|
|
|
|
|
|
|
public:
|
2018-10-11 00:27:17 +02:00
|
|
|
common::CombineVariants<Operations, Conversions, Others> u;
|
|
|
|
};
|
2018-06-19 23:16:01 +02:00
|
|
|
|
2018-08-29 00:15:18 +02:00
|
|
|
template<int KIND>
|
|
|
|
class Expr<Type<TypeCategory::Real, KIND>>
|
|
|
|
: public ExpressionBase<Type<TypeCategory::Real, KIND>> {
|
2018-07-12 01:36:43 +02:00
|
|
|
public:
|
2018-08-01 18:45:59 +02:00
|
|
|
using Result = Type<TypeCategory::Real, KIND>;
|
2018-08-16 20:46:18 +02:00
|
|
|
|
2018-09-15 00:48:40 +02:00
|
|
|
EVALUATE_UNION_CLASS_BOILERPLATE(Expr)
|
2018-09-13 01:27:51 +02:00
|
|
|
explicit Expr(const Scalar<Result> &x) : u{Constant<Result>{x}} {}
|
2018-07-19 18:53:42 +02:00
|
|
|
|
2018-07-12 01:36:43 +02:00
|
|
|
private:
|
2018-08-29 00:15:18 +02:00
|
|
|
// N.B. Real->Complex and Complex->Real conversions are done with CMPLX
|
|
|
|
// and part access operations (resp.). Conversions between kinds of
|
|
|
|
// Complex are done via decomposition to Real and reconstruction.
|
|
|
|
using Conversions = std::variant<Convert<Result, TypeCategory::Integer>,
|
|
|
|
Convert<Result, TypeCategory::Real>>;
|
|
|
|
using Operations = std::variant<ComplexComponent<KIND>, Parentheses<Result>,
|
|
|
|
Negate<Result>, Add<Result>, Subtract<Result>, Multiply<Result>,
|
|
|
|
Divide<Result>, Power<Result>, RealToIntPower<Result>, Extremum<Result>>;
|
2018-10-31 00:25:10 +01:00
|
|
|
using Others = std::variant<Constant<Result>, ArrayConstructor<Result>,
|
|
|
|
Designator<Result>, FunctionRef<Result>>;
|
2018-08-29 00:15:18 +02:00
|
|
|
|
|
|
|
public:
|
|
|
|
common::CombineVariants<Operations, Conversions, Others> u;
|
2018-06-19 23:16:01 +02:00
|
|
|
};
|
|
|
|
|
2018-08-29 00:15:18 +02:00
|
|
|
template<int KIND>
|
|
|
|
class Expr<Type<TypeCategory::Complex, KIND>>
|
|
|
|
: public ExpressionBase<Type<TypeCategory::Complex, KIND>> {
|
2018-07-12 01:36:43 +02:00
|
|
|
public:
|
2018-08-01 18:45:59 +02:00
|
|
|
using Result = Type<TypeCategory::Complex, KIND>;
|
2018-09-15 00:48:40 +02:00
|
|
|
EVALUATE_UNION_CLASS_BOILERPLATE(Expr)
|
2018-09-13 01:27:51 +02:00
|
|
|
explicit Expr(const Scalar<Result> &x) : u{Constant<Result>{x}} {}
|
2018-07-19 18:53:42 +02:00
|
|
|
|
2018-09-08 00:25:10 +02:00
|
|
|
// Note that many COMPLEX operations are represented as REAL operations
|
|
|
|
// over their components (viz., conversions, negation, add, and subtract).
|
|
|
|
using Operations =
|
|
|
|
std::variant<Parentheses<Result>, Multiply<Result>, Divide<Result>,
|
|
|
|
Power<Result>, RealToIntPower<Result>, ComplexConstructor<KIND>>;
|
2018-10-31 00:25:10 +01:00
|
|
|
using Others = std::variant<Constant<Result>, ArrayConstructor<Result>,
|
|
|
|
Designator<Result>, FunctionRef<Result>>;
|
2018-08-29 00:15:18 +02:00
|
|
|
|
|
|
|
public:
|
|
|
|
common::CombineVariants<Operations, Others> u;
|
2018-06-19 23:16:01 +02:00
|
|
|
};
|
|
|
|
|
2018-10-27 01:31:20 +02:00
|
|
|
FOR_EACH_INTEGER_KIND(extern template class Expr)
|
|
|
|
FOR_EACH_REAL_KIND(extern template class Expr)
|
|
|
|
FOR_EACH_COMPLEX_KIND(extern template class Expr)
|
2018-08-16 20:46:18 +02:00
|
|
|
|
2018-08-29 00:15:18 +02:00
|
|
|
template<int KIND>
|
|
|
|
class Expr<Type<TypeCategory::Character, KIND>>
|
|
|
|
: public ExpressionBase<Type<TypeCategory::Character, KIND>> {
|
2018-07-12 01:36:43 +02:00
|
|
|
public:
|
2018-08-01 18:45:59 +02:00
|
|
|
using Result = Type<TypeCategory::Character, KIND>;
|
2018-09-15 00:48:40 +02:00
|
|
|
EVALUATE_UNION_CLASS_BOILERPLATE(Expr)
|
2018-09-13 01:27:51 +02:00
|
|
|
explicit Expr(const Scalar<Result> &x) : u{Constant<Result>{x}} {}
|
|
|
|
explicit Expr(Scalar<Result> &&x) : u{Constant<Result>{std::move(x)}} {}
|
2018-06-22 00:35:25 +02:00
|
|
|
|
2018-08-14 22:39:59 +02:00
|
|
|
Expr<SubscriptInteger> LEN() const;
|
2018-06-22 00:35:25 +02:00
|
|
|
|
2018-11-01 19:18:12 +01:00
|
|
|
std::variant<Constant<Result>, LiteralSubstring<KIND>,
|
|
|
|
ArrayConstructor<Result>, Designator<Result>, FunctionRef<Result>,
|
|
|
|
Parentheses<Result>, Concat<KIND>, Extremum<Result>>
|
2018-08-29 00:15:18 +02:00
|
|
|
u;
|
2018-06-22 00:35:25 +02:00
|
|
|
};
|
|
|
|
|
2018-10-27 01:31:20 +02:00
|
|
|
FOR_EACH_CHARACTER_KIND(extern template class Expr)
|
2018-08-29 01:35:45 +02:00
|
|
|
|
2018-08-29 00:15:18 +02:00
|
|
|
// The Relational class template is a helper for constructing logical
|
2018-06-22 22:00:13 +02:00
|
|
|
// expressions with polymorphism over the cross product of the possible
|
|
|
|
// categories and kinds of comparable operands.
|
2018-08-18 00:38:37 +02:00
|
|
|
// Fortran defines a numeric relation with distinct types or kinds as
|
2018-09-08 00:25:10 +02:00
|
|
|
// first undergoing the same operand conversions that occur with the intrinsic
|
|
|
|
// addition operator. Character relations must have the same kind.
|
2018-08-29 00:15:18 +02:00
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|
|
// There are no relations between LOGICAL values.
|
2018-06-21 20:03:00 +02:00
|
|
|
|
2018-07-24 00:04:08 +02:00
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|
|
template<typename A>
|
2018-08-18 00:38:37 +02:00
|
|
|
struct Relational : public Operation<Relational<A>, LogicalResult, A, A> {
|
2018-10-24 23:06:46 +02:00
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|
using Result = LogicalResult;
|
2018-08-18 00:38:37 +02:00
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|
using Base = Operation<Relational, LogicalResult, A, A>;
|
2018-08-17 18:50:32 +02:00
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|
|
using Operand = typename Base::template Operand<0>;
|
2018-10-24 23:06:46 +02:00
|
|
|
static_assert(Operand::category == TypeCategory::Integer ||
|
|
|
|
Operand::category == TypeCategory::Real ||
|
|
|
|
Operand::category == TypeCategory::Character);
|
2018-08-18 00:38:37 +02:00
|
|
|
CLASS_BOILERPLATE(Relational)
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|
Relational(
|
2018-08-14 22:39:59 +02:00
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RelationalOperator r, const Expr<Operand> &a, const Expr<Operand> &b)
|
2018-07-20 21:19:09 +02:00
|
|
|
: Base{a, b}, opr{r} {}
|
2018-08-18 00:38:37 +02:00
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|
Relational(RelationalOperator r, Expr<Operand> &&a, Expr<Operand> &&b)
|
2018-07-20 21:19:09 +02:00
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|
: Base{std::move(a), std::move(b)}, opr{r} {}
|
2018-08-17 18:50:32 +02:00
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|
2018-09-07 19:33:32 +02:00
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|
std::ostream &Infix(std::ostream &) const;
|
2018-08-17 18:50:32 +02:00
|
|
|
|
2018-07-05 23:19:19 +02:00
|
|
|
RelationalOperator opr;
|
2018-06-21 20:03:00 +02:00
|
|
|
};
|
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|
2018-09-08 00:25:10 +02:00
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|
|
template<> class Relational<SomeType> {
|
2018-09-08 01:54:33 +02:00
|
|
|
// COMPLEX data are compared piecewise.
|
2018-09-08 00:25:10 +02:00
|
|
|
using DirectlyComparableTypes =
|
|
|
|
common::CombineTuples<IntegerTypes, RealTypes, CharacterTypes>;
|
|
|
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|
|
public:
|
2018-08-16 20:46:18 +02:00
|
|
|
using Result = LogicalResult;
|
2018-09-15 00:48:40 +02:00
|
|
|
EVALUATE_UNION_CLASS_BOILERPLATE(Relational)
|
2018-11-01 19:18:12 +01:00
|
|
|
static constexpr DynamicType GetType() { return Result::GetType(); }
|
2018-09-18 18:34:59 +02:00
|
|
|
int Rank() const {
|
|
|
|
return std::visit([](const auto &x) { return x.Rank(); }, u);
|
|
|
|
}
|
2018-08-29 00:15:18 +02:00
|
|
|
std::ostream &Dump(std::ostream &o) const;
|
2018-09-08 00:25:10 +02:00
|
|
|
common::MapTemplate<Relational, DirectlyComparableTypes> u;
|
2018-06-21 20:03:00 +02:00
|
|
|
};
|
|
|
|
|
2018-10-27 01:31:20 +02:00
|
|
|
FOR_EACH_INTEGER_KIND(extern template struct Relational)
|
|
|
|
FOR_EACH_REAL_KIND(extern template struct Relational)
|
|
|
|
FOR_EACH_CHARACTER_KIND(extern template struct Relational)
|
2018-08-29 01:35:45 +02:00
|
|
|
extern template struct Relational<SomeType>;
|
|
|
|
|
2018-10-24 01:48:06 +02:00
|
|
|
// Logical expressions of a kind bigger than LogicalResult
|
2018-10-24 23:06:46 +02:00
|
|
|
// do not include Relational<> operations as possibilities,
|
|
|
|
// since the results of Relationals are always LogicalResult
|
|
|
|
// (kind=1).
|
2018-08-29 00:15:18 +02:00
|
|
|
template<int KIND>
|
|
|
|
class Expr<Type<TypeCategory::Logical, KIND>>
|
|
|
|
: public ExpressionBase<Type<TypeCategory::Logical, KIND>> {
|
2018-07-12 01:36:43 +02:00
|
|
|
public:
|
2018-08-01 18:45:59 +02:00
|
|
|
using Result = Type<TypeCategory::Logical, KIND>;
|
2018-09-15 00:48:40 +02:00
|
|
|
EVALUATE_UNION_CLASS_BOILERPLATE(Expr)
|
2018-09-13 01:27:51 +02:00
|
|
|
explicit Expr(const Scalar<Result> &x) : u{Constant<Result>{x}} {}
|
|
|
|
explicit Expr(bool x) : u{Constant<Result>{x}} {}
|
2018-07-19 18:53:42 +02:00
|
|
|
|
2018-07-12 01:36:43 +02:00
|
|
|
private:
|
2018-10-24 01:48:06 +02:00
|
|
|
using Operations = std::variant<Convert<Result, TypeCategory::Logical>,
|
|
|
|
Parentheses<Result>, Not<KIND>, LogicalOperation<KIND>>;
|
|
|
|
using Relations = std::conditional_t<KIND == LogicalResult::kind,
|
|
|
|
std::variant<Relational<SomeType>>, std::variant<>>;
|
2018-10-31 00:25:10 +01:00
|
|
|
using Others = std::variant<Constant<Result>, ArrayConstructor<Result>,
|
|
|
|
Designator<Result>, FunctionRef<Result>>;
|
2018-08-29 00:15:18 +02:00
|
|
|
|
|
|
|
public:
|
2018-10-24 01:48:06 +02:00
|
|
|
common::CombineVariants<Operations, Relations, Others> u;
|
2018-06-19 23:16:01 +02:00
|
|
|
};
|
|
|
|
|
2018-10-27 01:31:20 +02:00
|
|
|
FOR_EACH_LOGICAL_KIND(extern template class Expr)
|
2018-08-29 01:35:45 +02:00
|
|
|
|
2018-10-31 00:25:10 +01:00
|
|
|
// An expression whose result has a derived type.
|
|
|
|
template<> class Expr<SomeDerived> : public ExpressionBase<SomeDerived> {
|
|
|
|
public:
|
|
|
|
using Result = SomeDerived;
|
|
|
|
EVALUATE_UNION_CLASS_BOILERPLATE(Expr)
|
|
|
|
// TODO: structure constructor
|
|
|
|
std::variant<Designator<Result>, ArrayConstructor<Result>,
|
|
|
|
FunctionRef<Result>>
|
|
|
|
u;
|
|
|
|
};
|
|
|
|
|
2018-08-29 00:15:18 +02:00
|
|
|
// A polymorphic expression of known intrinsic type category, but dynamic
|
|
|
|
// kind, represented as a discriminated union over Expr<Type<CAT, K>>
|
|
|
|
// for each supported kind K in the category.
|
|
|
|
template<TypeCategory CAT>
|
|
|
|
class Expr<SomeKind<CAT>> : public ExpressionBase<SomeKind<CAT>> {
|
2018-07-24 00:04:08 +02:00
|
|
|
public:
|
2018-08-13 22:33:31 +02:00
|
|
|
using Result = SomeKind<CAT>;
|
2018-09-15 00:48:40 +02:00
|
|
|
EVALUATE_UNION_CLASS_BOILERPLATE(Expr)
|
|
|
|
common::MapTemplate<Expr, CategoryTypes<CAT>> u;
|
|
|
|
};
|
|
|
|
|
2018-08-29 00:15:18 +02:00
|
|
|
// A completely generic expression, polymorphic across all of the intrinsic type
|
2018-07-19 18:53:42 +02:00
|
|
|
// categories and each of their kinds.
|
2018-08-29 00:15:18 +02:00
|
|
|
template<> class Expr<SomeType> : public ExpressionBase<SomeType> {
|
2018-08-14 22:39:59 +02:00
|
|
|
public:
|
|
|
|
using Result = SomeType;
|
2018-09-15 00:48:40 +02:00
|
|
|
EVALUATE_UNION_CLASS_BOILERPLATE(Expr)
|
2018-08-10 20:44:43 +02:00
|
|
|
|
2018-09-07 19:33:32 +02:00
|
|
|
// Owning references to these generic expressions can appear in other
|
|
|
|
// compiler data structures (viz., the parse tree and symbol table), so
|
|
|
|
// its destructor is externalized to reduce redundant default instances.
|
|
|
|
~Expr();
|
|
|
|
|
2018-08-01 18:45:59 +02:00
|
|
|
template<TypeCategory CAT, int KIND>
|
2018-09-13 01:27:51 +02:00
|
|
|
explicit Expr(const Expr<Type<CAT, KIND>> &x) : u{Expr<SomeKind<CAT>>{x}} {}
|
2018-08-10 20:44:43 +02:00
|
|
|
|
2018-08-01 18:45:59 +02:00
|
|
|
template<TypeCategory CAT, int KIND>
|
2018-09-13 01:27:51 +02:00
|
|
|
explicit Expr(Expr<Type<CAT, KIND>> &&x)
|
|
|
|
: u{Expr<SomeKind<CAT>>{std::move(x)}} {}
|
2018-08-10 20:44:43 +02:00
|
|
|
|
2018-08-29 00:15:18 +02:00
|
|
|
template<TypeCategory CAT, int KIND>
|
|
|
|
Expr &operator=(const Expr<Type<CAT, KIND>> &x) {
|
|
|
|
u = Expr<SomeKind<CAT>>{x};
|
|
|
|
return *this;
|
|
|
|
}
|
2018-08-13 22:33:31 +02:00
|
|
|
|
2018-08-29 00:15:18 +02:00
|
|
|
template<TypeCategory CAT, int KIND>
|
|
|
|
Expr &operator=(Expr<Type<CAT, KIND>> &&x) {
|
|
|
|
u = Expr<SomeKind<CAT>>{std::move(x)};
|
|
|
|
return *this;
|
|
|
|
}
|
|
|
|
|
2018-09-15 00:48:40 +02:00
|
|
|
private:
|
|
|
|
using Others = std::variant<BOZLiteralConstant>;
|
2018-08-29 21:26:22 +02:00
|
|
|
using Categories = common::MapTemplate<Expr, SomeCategory>;
|
2018-09-15 00:48:40 +02:00
|
|
|
|
|
|
|
public:
|
2018-08-29 01:35:45 +02:00
|
|
|
common::CombineVariants<Others, Categories> u;
|
2018-06-19 23:16:01 +02:00
|
|
|
};
|
2018-06-20 20:55:10 +02:00
|
|
|
|
2018-09-07 19:33:32 +02:00
|
|
|
// This wrapper class is used, by means of a forward reference with
|
|
|
|
// OwningPointer, to implement owning pointers to analyzed expressions
|
|
|
|
// from parse tree nodes.
|
|
|
|
struct GenericExprWrapper {
|
|
|
|
GenericExprWrapper(Expr<SomeType> &&x) : v{std::move(x)} {}
|
|
|
|
Expr<SomeType> v;
|
|
|
|
};
|
|
|
|
|
2018-10-27 01:31:20 +02:00
|
|
|
FOR_EACH_CATEGORY_TYPE(extern template class Expr)
|
2018-10-30 20:44:09 +01:00
|
|
|
FOR_EACH_TYPE_AND_KIND(extern template class ExpressionBase)
|
2018-10-25 14:55:23 +02:00
|
|
|
}
|
2018-06-18 21:09:56 +02:00
|
|
|
#endif // FORTRAN_EVALUATE_EXPRESSION_H_
|