chromium/third_party/eigen3/src/Eigen/src/Core/IO.h

// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2006-2008 Benoit Jacob <[email protected]>
// Copyright (C) 2008 Gael Guennebaud <[email protected]>
//
// This Source Code Form is subject to the terms of the Mozilla
// Public License v. 2.0. If a copy of the MPL was not distributed
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.

#ifndef EIGEN_IO_H
#define EIGEN_IO_H

// IWYU pragma: private
#include "./InternalHeaderCheck.h"

namespace Eigen {

enum { … };
enum { … };

namespace internal {
template <typename Derived>
std::ostream& print_matrix(std::ostream& s, const Derived& _m, const IOFormat& fmt);
}

/** \class IOFormat
 * \ingroup Core_Module
 *
 * \brief Stores a set of parameters controlling the way matrices are printed
 *
 * List of available parameters:
 *  - \b precision number of digits for floating point values, or one of the special constants \c StreamPrecision and \c
 * FullPrecision. The default is the special value \c StreamPrecision which means to use the stream's own precision
 * setting, as set for instance using \c cout.precision(3). The other special value \c FullPrecision means that the
 * number of digits will be computed to match the full precision of each floating-point type.
 *  - \b flags an OR-ed combination of flags, the default value is 0, the only currently available flag is \c
 * DontAlignCols which allows to disable the alignment of columns, resulting in faster code.
 *  - \b coeffSeparator string printed between two coefficients of the same row
 *  - \b rowSeparator string printed between two rows
 *  - \b rowPrefix string printed at the beginning of each row
 *  - \b rowSuffix string printed at the end of each row
 *  - \b matPrefix string printed at the beginning of the matrix
 *  - \b matSuffix string printed at the end of the matrix
 *  - \b fill character printed to fill the empty space in aligned columns
 *
 * Example: \include IOFormat.cpp
 * Output: \verbinclude IOFormat.out
 *
 * \sa DenseBase::format(), class WithFormat
 */
struct IOFormat { … };

/** \class WithFormat
 * \ingroup Core_Module
 *
 * \brief Pseudo expression providing matrix output with given format
 *
 * \tparam ExpressionType the type of the object on which IO stream operations are performed
 *
 * This class represents an expression with stream operators controlled by a given IOFormat.
 * It is the return type of DenseBase::format()
 * and most of the time this is the only way it is used.
 *
 * See class IOFormat for some examples.
 *
 * \sa DenseBase::format(), class IOFormat
 */
template <typename ExpressionType>
class WithFormat { … };

namespace internal {

// NOTE: This helper is kept for backward compatibility with previous code specializing
//       this internal::significant_decimals_impl structure. In the future we should directly
//       call max_digits10().
template <typename Scalar>
struct significant_decimals_impl { … };

/** \internal
 * print the matrix \a _m to the output stream \a s using the output format \a fmt */
template <typename Derived>
std::ostream& print_matrix(std::ostream& s, const Derived& _m, const IOFormat& fmt) { … }

}  // end namespace internal

/** \relates DenseBase
 *
 * Outputs the matrix, to the given stream.
 *
 * If you wish to print the matrix with a format different than the default, use DenseBase::format().
 *
 * It is also possible to change the default format by defining EIGEN_DEFAULT_IO_FORMAT before including Eigen headers.
 * If not defined, this will automatically be defined to Eigen::IOFormat(), that is the Eigen::IOFormat with default
 * parameters.
 *
 * \sa DenseBase::format()
 */
template <typename Derived>
std::ostream& operator<<(std::ostream& s, const DenseBase<Derived>& m) { … }

template <typename Derived>
std::ostream& operator<<(std::ostream& s, const DiagonalBase<Derived>& m) { … }

}  // end namespace Eigen

#endif  // EIGEN_IO_H