2ad9986698
Original-commit: flang-compiler/f18@42013513e9 Reviewed-on: https://github.com/flang-compiler/f18/pull/251
93 lines
3.3 KiB
C++
93 lines
3.3 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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#ifndef FORTRAN_EVALUATE_CALL_H_
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#define FORTRAN_EVALUATE_CALL_H_
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#include "common.h"
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#include "type.h"
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#include "../common/indirection.h"
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#include "../parser/char-block.h"
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#include "../semantics/attr.h"
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#include <optional>
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#include <ostream>
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#include <vector>
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namespace Fortran::semantics {
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class Symbol;
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}
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namespace Fortran::evaluate {
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struct ActualArgument {
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explicit ActualArgument(Expr<SomeType> &&x) : value{std::move(x)} {}
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explicit ActualArgument(CopyableIndirection<Expr<SomeType>> &&v)
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: value{std::move(v)} {}
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std::optional<DynamicType> GetType() const;
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int Rank() const;
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bool operator==(const ActualArgument &) const;
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std::ostream &AsFortran(std::ostream &) const;
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std::optional<int> VectorSize() const;
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std::optional<parser::CharBlock> keyword;
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bool isAlternateReturn{false}; // when true, "value" is a label number
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// TODO: Mark legacy %VAL and %REF arguments
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// Subtlety: There is a distinction that must be maintained here between an
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// actual argument expression that is a variable and one that is not,
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// e.g. between X and (X). The parser attempts to parse each argument
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// first as a variable, then as an expression, and the distinction appears
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// in the parse tree.
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CopyableIndirection<Expr<SomeType>> value;
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};
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using ActualArguments = std::vector<std::optional<ActualArgument>>;
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// Intrinsics are identified by their names and the characteristics
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// of their arguments, at least for now.
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using IntrinsicProcedure = const char *; // not an owning pointer
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struct SpecificIntrinsic {
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explicit SpecificIntrinsic(IntrinsicProcedure n) : name{n} {}
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SpecificIntrinsic(IntrinsicProcedure n, std::optional<DynamicType> &&dt,
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int r, semantics::Attrs a)
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: name{n}, type{std::move(dt)}, rank{r}, attrs{a} {}
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bool operator==(const SpecificIntrinsic &) const;
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std::ostream &AsFortran(std::ostream &) const;
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IntrinsicProcedure name;
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bool isRestrictedSpecific{false}; // if true, can only call it
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std::optional<DynamicType> type; // absent if and only if subroutine call
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int rank{0};
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semantics::Attrs attrs; // ELEMENTAL, POINTER
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};
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struct ProcedureDesignator {
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EVALUATE_UNION_CLASS_BOILERPLATE(ProcedureDesignator)
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explicit ProcedureDesignator(SpecificIntrinsic &&i) : u{std::move(i)} {}
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explicit ProcedureDesignator(const semantics::Symbol &n) : u{&n} {}
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std::optional<DynamicType> GetType() const;
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int Rank() const;
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bool IsElemental() const;
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Expr<SubscriptInteger> LEN() const;
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const semantics::Symbol *GetSymbol() const;
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std::ostream &AsFortran(std::ostream &) const;
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// TODO: When calling X%F, pass X as PASS argument unless NOPASS
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std::variant<SpecificIntrinsic, const semantics::Symbol *> u;
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};
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}
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#endif // FORTRAN_EVALUATE_CALL_H_
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