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//===-- lib/Semantics/check-io.h --------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef FORTRAN_SEMANTICS_CHECK_IO_H_
#define FORTRAN_SEMANTICS_CHECK_IO_H_
#include "flang/Common/enum-set.h"
#include "flang/Parser/parse-tree.h"
#include "flang/Semantics/semantics.h"
#include "flang/Semantics/tools.h"
namespace Fortran::semantics {
using common::IoSpecKind;
using common::IoStmtKind;
class IoChecker : public virtual BaseChecker {
public:
explicit IoChecker(SemanticsContext &context) : context_{context} {}
void Enter(const parser::BackspaceStmt &) { Init(IoStmtKind::Backspace); }
void Enter(const parser::CloseStmt &) { Init(IoStmtKind::Close); }
void Enter(const parser::EndfileStmt &) { Init(IoStmtKind::Endfile); }
void Enter(const parser::FlushStmt &) { Init(IoStmtKind::Flush); }
void Enter(const parser::InquireStmt &) { Init(IoStmtKind::Inquire); }
void Enter(const parser::OpenStmt &) { Init(IoStmtKind::Open); }
void Enter(const parser::PrintStmt &) { Init(IoStmtKind::Print); }
void Enter(const parser::ReadStmt &) { Init(IoStmtKind::Read); }
void Enter(const parser::RewindStmt &) { Init(IoStmtKind::Rewind); }
void Enter(const parser::WaitStmt &) { Init(IoStmtKind::Wait); }
void Enter(const parser::WriteStmt &) { Init(IoStmtKind::Write); }
void Enter(
const parser::Statement<common::Indirection<parser::FormatStmt>> &);
void Enter(const parser::ConnectSpec &);
void Enter(const parser::ConnectSpec::CharExpr &);
void Enter(const parser::ConnectSpec::Newunit &);
void Enter(const parser::ConnectSpec::Recl &);
void Enter(const parser::EndLabel &);
void Enter(const parser::EorLabel &);
void Enter(const parser::ErrLabel &);
void Enter(const parser::FileUnitNumber &);
void Enter(const parser::Format &);
void Enter(const parser::IdExpr &);
void Enter(const parser::IdVariable &);
void Enter(const parser::InputItem &);
void Enter(const parser::InquireSpec &);
void Enter(const parser::InquireSpec::CharVar &);
void Enter(const parser::InquireSpec::IntVar &);
void Enter(const parser::InquireSpec::LogVar &);
void Enter(const parser::IoControlSpec &);
void Enter(const parser::IoControlSpec::Asynchronous &);
void Enter(const parser::IoControlSpec::CharExpr &);
void Enter(const parser::IoControlSpec::Pos &);
void Enter(const parser::IoControlSpec::Rec &);
void Enter(const parser::IoControlSpec::Size &);
void Enter(const parser::IoUnit &);
void Enter(const parser::MsgVariable &);
void Enter(const parser::OutputItem &);
void Enter(const parser::StatusExpr &);
void Enter(const parser::StatVariable &);
void Leave(const parser::BackspaceStmt &);
void Leave(const parser::CloseStmt &);
void Leave(const parser::EndfileStmt &);
void Leave(const parser::FlushStmt &);
void Leave(const parser::InquireStmt &);
void Leave(const parser::OpenStmt &);
void Leave(const parser::PrintStmt &);
void Leave(const parser::ReadStmt &);
void Leave(const parser::RewindStmt &);
void Leave(const parser::WaitStmt &);
void Leave(const parser::WriteStmt &);
private:
// Presence flag values.
ENUM_CLASS(Flag, IoControlList, InternalUnit, NumberUnit, StarUnit, CharFmt,
LabelFmt, StarFmt, AssignFmt, FmtOrNml, KnownAccess, AccessDirect,
AccessStream, AdvanceYes, AsynchronousYes, KnownStatus, StatusNew,
StatusReplace, StatusScratch, DataList)
template <typename R, typename T> std::optional<R> GetConstExpr(const T &x) {
using DefaultCharConstantType = evaluate::Ascii;
if (const SomeExpr * expr{GetExpr(context_, x)}) {
const auto foldExpr{
evaluate::Fold(context_.foldingContext(), common::Clone(*expr))};
if constexpr (std::is_same_v<R, std::string>) {
return evaluate::GetScalarConstantValue<DefaultCharConstantType>(
foldExpr);
} else {
static_assert(std::is_same_v<R, std::int64_t>, "unexpected type");
return evaluate::ToInt64(foldExpr);
}
}
return std::nullopt;
}
void LeaveReadWrite() const;
void SetSpecifier(IoSpecKind);
void CheckStringValue(
IoSpecKind, const std::string &, const parser::CharBlock &) const;
void CheckForRequiredSpecifier(IoSpecKind) const;
void CheckForRequiredSpecifier(bool, const std::string &) const;
void CheckForRequiredSpecifier(IoSpecKind, IoSpecKind) const;
void CheckForRequiredSpecifier(IoSpecKind, bool, const std::string &) const;
void CheckForRequiredSpecifier(bool, const std::string &, IoSpecKind) const;
void CheckForRequiredSpecifier(
bool, const std::string &, bool, const std::string &) const;
void CheckForProhibitedSpecifier(IoSpecKind) const;
void CheckForProhibitedSpecifier(IoSpecKind, IoSpecKind) const;
void CheckForProhibitedSpecifier(IoSpecKind, bool, const std::string &) const;
void CheckForProhibitedSpecifier(bool, const std::string &, IoSpecKind) const;
template <typename A>
void CheckForDefinableVariable(const A &var, const std::string &s) const;
void CheckForPureSubprogram() const;
parser::Message *CheckForBadIoType(const evaluate::DynamicType &,
common::DefinedIo, parser::CharBlock) const;
void CheckForBadIoType(
const SomeExpr &, common::DefinedIo, parser::CharBlock) const;
parser::Message *CheckForBadIoType(
const Symbol &, common::DefinedIo, parser::CharBlock) const;
void CheckNamelist(
const Symbol &, common::DefinedIo, parser::CharBlock) const;
void Init(IoStmtKind s) {
stmt_ = s;
specifierSet_.reset();
flags_.reset();
}
void Done() { stmt_ = IoStmtKind::None; }
SemanticsContext &context_;
IoStmtKind stmt_{IoStmtKind::None};
common::EnumSet<IoSpecKind, common::IoSpecKind_enumSize> specifierSet_;
common::EnumSet<Flag, Flag_enumSize> flags_;
};
} // namespace Fortran::semantics
#endif // FORTRAN_SEMANTICS_CHECK_IO_H_
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