showable_macros.h

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/**
 *  \file IMP/showable_macros.h
 *  \brief Macros to help with objects that can be printed to a stream.
 *
 *  Copyright 2007-2021 IMP Inventors. All rights reserved.
 *
 */

#ifndef IMPKERNEL_SHOWABLE_MACROS_H
#define IMPKERNEL_SHOWABLE_MACROS_H
#include <IMP/kernel_config.h>
#include "Showable.h"
#include "warning_macros.h"

#if defined(IMP_DOXYGEN) || defined(SWIG)

/** \name Showable
    Declare the methods needed by an object that can be printed,
    both from C++ and Python. Each value-type class should have an
    IMP_SHOWABLE() call internal to it and an IMP_OUTPUT_OPERATOR()
    call external to it.

    The suffixes are the number of template arguments that the
    object has (eg _1 means one template argument). _D means
    one integer template argument.
    @{
*/

/** This macro declares the method
    - void show(std::ostream &out) const
    It also makes it so that the object can be printed
    in Python.

    The \c ostream and \c sstream headers must be included.

    \see IMP_SHOWABLE_INLINE().

    Do not use with IMP::Object objects as they have their
    own show mechanism.
*/
#define IMP_SHOWABLE(Name) void show(std::ostream &out = std::cout) const

//! Declare the methods needed by an object that can be printed
/** This macro declares the method
    - \c void \c show(std::ostream &out) const
    It also makes it so that the object can be printed
    in Python.

    The \c ostream and \c sstream headers must be included.
*/
#define IMP_SHOWABLE_INLINE(Name, how_to_show) \
  void show(std::ostream &out = std::cout) const
/** @} */

#else

#define IMP_SHOWABLE(Name)                                       \
  IMP_HELPER_MACRO_PUSH_WARNINGS void show(std::ostream &out =   \
                                               std::cout) const; \
  operator IMP::Showable() const {                         \
    std::ostringstream oss;                                      \
    show(oss);                                                   \
    return IMP::Showable(oss.str());                       \
  }                                                              \
  IMP_HELPER_MACRO_POP_WARNINGS IMP_REQUIRE_SEMICOLON_CLASS(showable)

#define IMP_SHOWABLE_INLINE(Name, how_to_show)                    \
  IMP_HELPER_MACRO_PUSH_WARNINGS void show(std::ostream &out =    \
                                               std::cout) const { \
    how_to_show;                                                  \
  }                                                               \
  operator IMP::Showable() const {                          \
    std::ostringstream oss;                                       \
    show(oss);                                                    \
    return IMP::Showable(oss.str());                        \
  }                                                               \
  IMP_HELPER_MACRO_POP_WARNINGS IMP_REQUIRE_SEMICOLON_CLASS(showable)

#endif

/** @} */

#endif /* IMPKERNEL_SHOWABLE_MACROS_H */