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//===-- runtime/namelist.h --------------------------------------*- C++ -*-===//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// Defines the data structure used for NAMELIST I/O
#include <cstddef>
namespace Fortran::runtime {
class Descriptor;
class IoStatementState;
} // namespace Fortran::runtime
namespace Fortran::runtime::io {
// A NAMELIST group is a named ordered collection of distinct variable names.
// It is packaged by lowering into an instance of this class.
// If all the items are variables with fixed addresses, the NAMELIST group
// description can be in a read-only section.
class NamelistGroup {
struct Item {
const char *name; // NUL-terminated lower-case
const Descriptor &descriptor;
const char *groupName; // NUL-terminated lower-case
std::size_t items;
const Item *item; // in original declaration order
// Look ahead on input for an identifier followed by a '=', '(', or '%'
// character; for use in disambiguating a name-like value (e.g. F or T) from a
// NAMELIST group item name. Always false when not reading a NAMELIST.
bool IsNamelistName(IoStatementState &);
} // namespace Fortran::runtime::io