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Edit File : assert.h \| Size : 7.54 KB
#ifndef RUBY_ASSERT_H /--C++--vi:se ft=cpp:/ #define RUBY_ASSERT_H /** * @file * @author Ruby developers <ruby-core@ruby-lang.org> * @date Wed May 18 00:21:44 JST 1994 * @copyright This file is a part of the programming language Ruby. * Permission is hereby granted, to either redistribute and/or * modify this file, provided that the conditions mentioned in the * file COPYING are met. Consult the file for details. * @warning Symbols prefixed with either `RBIMPL` or `rbimpl` are * implementation details. Don't take them as canon. They could * rapidly appear then vanish. The name (path) of this header file * is also an implementation detail. Do not expect it to persist * at the place it is now. Developers are free to move it anywhere * anytime at will. * @note To ruby-core: remember that this header can be possibly * recursively included from extension libraries written in C++. * Do not expect for instance `__VA_ARGS__` is always available. * We assume C99 for ruby itself but we don't assume languages of * extension libraries. They could be written in C++98. / #include "ruby/internal/assume.h" #include "ruby/internal/attr/cold.h" #include "ruby/internal/attr/noreturn.h" #include "ruby/internal/cast.h" #include "ruby/internal/dllexport.h" #include "ruby/backward/2/assume.h" / RUBY_NDEBUG is very simple: after everything described below are done, * define it with either NDEBUG is undefined (=0) or defined (=1). It is truly * subordinate. * * RUBY_DEBUG versus NDEBUG is complicated. Assertions shall be: * * \| -UNDEBUG \| -DNDEBUG * ---------------+----------+--------- * -URUBY_DEBUG \| (1) \| disabled -DRUBY_DEBUG=0 \| disabled \| disabled * -DRUBY_DEBUG=1 \| enabled \| (2) -DRUBY_DEBUG \| enabled \| (2) * where: * * - (1): Assertions shall be silently disabled, no warnings, in favour of commit 21991e6ca59274e41a472b5256bd3245f6596c90. * * - (2): Compile-time warnings shall be issued. / /** @cond INTERNAL_MACRO / / * Pro tip: `!!RUBY_DEBUG-1` expands to... * * - `!!(-1)` (== `!0` == `1`) when RUBY_DEBUG is defined to be empty, * - `(!!0)-1` (== `0-1` == `-1`) when RUBY_DEBUG is defined as 0, and * - `(!!n)-1` (== `1-1` == `0`) when RUBY_DEBUG is defined as something else. / #if ! defined(RUBY_DEBUG) # define RBIMPL_RUBY_DEBUG 0 #elif !!RUBY_DEBUG-1 < 0 # define RBIMPL_RUBY_DEBUG 0 #else # define RBIMPL_RUBY_DEBUG 1 #endif / * ISO/IEC 9899 (all past versions) says that "If NDEBUG is defined as a macro * name at the point in the source file where <assert.h> is included, ..." * which means we must not take its defined value into account. / #if defined(NDEBUG) # define RBIMPL_NDEBUG 1 #else # define RBIMPL_NDEBUG 0 #endif /* @endcond / / Here we go... / #undef RUBY_DEBUG #undef RUBY_NDEBUG #undef NDEBUG #if defined(__DOXYGEN__) # /* Define this macro when you want assertions. / # define RUBY_DEBUG 0 # /* Define this macro when you don't want assertions. / # define NDEBUG # /* This macro is basically the same as #NDEBUG / # define RUBY_NDEBUG 1 #elif (RBIMPL_NDEBUG == 1) && (RBIMPL_RUBY_DEBUG == 0) # / Assertions disabled as per request, no conflicts. / # define RUBY_DEBUG 0 # define RUBY_NDEBUG 1 # define NDEBUG #elif (RBIMPL_NDEBUG == 0) && (RBIMPL_RUBY_DEBUG == 1) # / Assertions enabled as per request, no conflicts. / # define RUBY_DEBUG 1 # define RUBY_NDEBUG 0 # / keep NDEBUG undefined / #elif (RBIMPL_NDEBUG == 0) && (RBIMPL_RUBY_DEBUG == 0) # / The (1) situation in avobe diagram. / # define RUBY_DEBUG 0 # define RUBY_NDEBUG 1 # define NDEBUG #elif (RBIMPL_NDEBUG == 1) && (RBIMPL_RUBY_DEBUG == 1) # /* The (2) situation in above diagram. / # define RUBY_DEBUG 1 # define RUBY_NDEBUG 0 # /* keep NDEBUG undefined / # if defined(_MSC_VER) # pragma message("NDEBUG is ignored because RUBY_DEBUG>0.") # elif defined(__GNUC__) # pragma GCC warning "NDEBUG is ignored because RUBY_DEBUG>0." # else # error NDEBUG is ignored because RUBY_DEBUG>0. # endif #endif #undef RBIMPL_NDEBUG #undef RBIMPL_RUBY_DEBUG /* @cond INTERNAL_MACRO / #define RBIMPL_ASSERT_NOTHING RBIMPL_CAST((void)0) RBIMPL_SYMBOL_EXPORT_BEGIN() RBIMPL_ATTR_NORETURN() RBIMPL_ATTR_COLD() void rb_assert_failure(const char file, int line, const char name, const char expr); RBIMPL_SYMBOL_EXPORT_END() #ifdef RUBY_FUNCTION_NAME_STRING # define RBIMPL_ASSERT_FUNC RUBY_FUNCTION_NAME_STRING #else # define RBIMPL_ASSERT_FUNC RBIMPL_CAST((const char )0) #endif /* @endcond / /* * Prints the given message, and terminates the entire process abnormally. * * @param mesg The message to display. / #define RUBY_ASSERT_FAIL(mesg) \ rb_assert_failure(__FILE__, __LINE__, RBIMPL_ASSERT_FUNC, mesg) /* * Asserts that the expression is truthy. If not aborts with the message. * * @param expr What supposedly evaluates to true. * @param mesg The message to display on failure. / #define RUBY_ASSERT_MESG(expr, mesg) \ (RB_LIKELY(expr) ? RBIMPL_ASSERT_NOTHING : RUBY_ASSERT_FAIL(mesg)) /* * A variant of #RUBY_ASSERT that does not interface with #RUBY_DEBUG. * * @copydetails #RUBY_ASSERT / #define RUBY_ASSERT_ALWAYS(expr) RUBY_ASSERT_MESG((expr), #expr) /* * Asserts that the given expression is truthy iff #RUBY_DEBUG is truthy. * * @param expr What supposedly evaluates to true. / #if RUBY_DEBUG # define RUBY_ASSERT(expr) RUBY_ASSERT_MESG((expr), #expr) #else # define RUBY_ASSERT(expr) RBIMPL_ASSERT_NOTHING #endif /* * A variant of #RUBY_ASSERT that interfaces with #NDEBUG instead of * #RUBY_DEBUG. This almost resembles `assert` C standard macro, except minor * implementation details. * * @copydetails #RUBY_ASSERT / / Currently `RUBY_DEBUG == ! defined(NDEBUG)` is always true. There is no * difference any longer between this one and `RUBY_ASSERT`. / #if defined(NDEBUG) # define RUBY_ASSERT_NDEBUG(expr) RBIMPL_ASSERT_NOTHING #else # define RUBY_ASSERT_NDEBUG(expr) RUBY_ASSERT_MESG((expr), #expr) #endif /* * @copydoc #RUBY_ASSERT_WHEN * @param mesg The message to display on failure. / #if RUBY_DEBUG # define RUBY_ASSERT_MESG_WHEN(cond, expr, mesg) RUBY_ASSERT_MESG((expr), (mesg)) #else # define RUBY_ASSERT_MESG_WHEN(cond, expr, mesg) \ ((cond) ? RUBY_ASSERT_MESG((expr), (mesg)) : RBIMPL_ASSERT_NOTHING) #endif /* * A variant of #RUBY_ASSERT that asserts when either #RUBY_DEBUG or `cond` * parameter is truthy. * * @param cond Extra condition that shall hold for assertion to take effect. * @param expr What supposedly evaluates to true. / #define RUBY_ASSERT_WHEN(cond, expr) RUBY_ASSERT_MESG_WHEN((cond), (expr), #expr) /* * This is either #RUBY_ASSERT or #RBIMPL_ASSUME, depending on #RUBY_DEBUG. * * @copydetails #RUBY_ASSERT / #if RUBY_DEBUG # define RBIMPL_ASSERT_OR_ASSUME(expr) RUBY_ASSERT_ALWAYS(expr) #elif RBIMPL_COMPILER_BEFORE(Clang, 7, 0, 0) # / See commit 67d259c5dccd31fe49d417fec169977712ffdf10 / # define RBIMPL_ASSERT_OR_ASSUME(expr) RBIMPL_ASSERT_NOTHING #elif defined(RUBY_ASSERT_NOASSUME) # / See commit d300a734414ef6de7e8eb563b7cc4389c455ed08 / # define RBIMPL_ASSERT_OR_ASSUME(expr) RBIMPL_ASSERT_NOTHING #elif ! defined(RBIMPL_HAVE___ASSUME) # define RBIMPL_ASSERT_OR_ASSUME(expr) RBIMPL_ASSERT_NOTHING #else # define RBIMPL_ASSERT_OR_ASSUME(expr) RBIMPL_ASSUME(expr) #endif #endif / RUBY_ASSERT_H */ Back

Edit File : assert.h | Size : 7.54 KB

#ifndef RUBY_ASSERT_H                                /*-*-C++-*-vi:se ft=cpp:*/
#define RUBY_ASSERT_H
/**
 * @file
 * @author     Ruby developers <ruby-core@ruby-lang.org>
 * @date       Wed May 18 00:21:44 JST 1994
 * @copyright  This  file  is   a  part  of  the   programming  language  Ruby.
 *             Permission  is hereby  granted,  to  either redistribute  and/or
 *             modify this file, provided that  the conditions mentioned in the
 *             file COPYING are met.  Consult the file for details.
 * @warning    Symbols   prefixed  with   either  `RBIMPL`   or  `rbimpl`   are
 *             implementation details.   Don't take  them as canon.  They could
 *             rapidly appear then vanish.  The name (path) of this header file
 *             is also an  implementation detail.  Do not expect  it to persist
 *             at the place it is now.  Developers are free to move it anywhere
 *             anytime at will.
 * @note       To  ruby-core:  remember  that   this  header  can  be  possibly
 *             recursively included  from extension  libraries written  in C++.
 *             Do not  expect for  instance `__VA_ARGS__` is  always available.
 *             We assume C99  for ruby itself but we don't  assume languages of
 *             extension libraries. They could be written in C++98.
 */
#include "ruby/internal/assume.h"
#include "ruby/internal/attr/cold.h"
#include "ruby/internal/attr/noreturn.h"
#include "ruby/internal/cast.h"
#include "ruby/internal/dllexport.h"
#include "ruby/backward/2/assume.h"

/* RUBY_NDEBUG  is very  simple:  after everything  described  below are  done,
 * define it with either NDEBUG is undefined (=0) or defined (=1).  It is truly
 * subordinate.
 *
 * RUBY_DEBUG versus NDEBUG is complicated.  Assertions shall be:
 *
 *                      | -UNDEBUG | -DNDEBUG
 *       ---------------+----------+---------
 *       -URUBY_DEBUG   | (*1)     | disabled
 *       -DRUBY_DEBUG=0 | disabled | disabled
 *       -DRUBY_DEBUG=1 | enabled  | (*2)
 *       -DRUBY_DEBUG   | enabled  | (*2)
 *
 * where:
 *
 *   - (*1): Assertions shall  be silently disabled, no warnings,  in favour of
 *     commit 21991e6ca59274e41a472b5256bd3245f6596c90.
 *
 *   - (*2): Compile-time warnings shall be issued.
 */

/** @cond INTERNAL_MACRO */

/*
 * Pro tip: `!!RUBY_DEBUG-1` expands to...
 *
 * - `!!(-1)`  (== `!0`  ==  `1`) when RUBY_DEBUG is defined to be empty,
 * - `(!!0)-1` (== `0-1` == `-1`) when RUBY_DEBUG is defined as 0, and
 * - `(!!n)-1` (== `1-1` ==  `0`) when RUBY_DEBUG is defined as something else.
 */
#if ! defined(RUBY_DEBUG)
# define RBIMPL_RUBY_DEBUG 0
#elif !!RUBY_DEBUG-1 < 0
# define RBIMPL_RUBY_DEBUG 0
#else
# define RBIMPL_RUBY_DEBUG 1
#endif

/*
 * ISO/IEC 9899 (all past versions) says that  "If NDEBUG is defined as a macro
 * name at  the point  in the  source file where  <assert.h> is  included, ..."
 * which means we must not take its defined value into account.
 */
#if defined(NDEBUG)
# define RBIMPL_NDEBUG 1
#else
# define RBIMPL_NDEBUG 0
#endif

/** @endcond */

/* Here we go... */
#undef RUBY_DEBUG
#undef RUBY_NDEBUG
#undef NDEBUG
#if defined(__DOXYGEN__)
# /** Define this macro when you want assertions. */
# define RUBY_DEBUG 0
# /** Define this macro when you don't want assertions. */
# define NDEBUG
# /** This macro is basically the same as #NDEBUG */
# define RUBY_NDEBUG 1

#elif (RBIMPL_NDEBUG == 1) && (RBIMPL_RUBY_DEBUG == 0)
# /* Assertions disabled as per request, no conflicts. */
# define RUBY_DEBUG 0
# define RUBY_NDEBUG 1
# define NDEBUG

#elif (RBIMPL_NDEBUG == 0) && (RBIMPL_RUBY_DEBUG == 1)
# /* Assertions enabled as per request, no conflicts. */
# define RUBY_DEBUG 1
# define RUBY_NDEBUG 0
# /* keep NDEBUG undefined */

#elif (RBIMPL_NDEBUG == 0) && (RBIMPL_RUBY_DEBUG == 0)
# /* The (*1) situation in avobe diagram. */
# define RUBY_DEBUG 0
# define RUBY_NDEBUG 1
# define NDEBUG

#elif (RBIMPL_NDEBUG == 1) && (RBIMPL_RUBY_DEBUG == 1)
# /* The (*2) situation in above diagram. */
# define RUBY_DEBUG 1
# define RUBY_NDEBUG 0
# /* keep NDEBUG undefined */

# if defined(_MSC_VER)
#  pragma message("NDEBUG is ignored because RUBY_DEBUG>0.")
# elif defined(__GNUC__)
#  pragma GCC warning "NDEBUG is ignored because RUBY_DEBUG>0."
# else
#  error NDEBUG is ignored because RUBY_DEBUG>0.
# endif
#endif
#undef RBIMPL_NDEBUG
#undef RBIMPL_RUBY_DEBUG

/** @cond INTERNAL_MACRO */
#define RBIMPL_ASSERT_NOTHING RBIMPL_CAST((void)0)

RBIMPL_SYMBOL_EXPORT_BEGIN()
RBIMPL_ATTR_NORETURN()
RBIMPL_ATTR_COLD()
void rb_assert_failure(const char *file, int line, const char *name, const char *expr);
RBIMPL_SYMBOL_EXPORT_END()

#ifdef RUBY_FUNCTION_NAME_STRING
# define RBIMPL_ASSERT_FUNC RUBY_FUNCTION_NAME_STRING
#else
# define RBIMPL_ASSERT_FUNC RBIMPL_CAST((const char *)0)
#endif

/** @endcond */

/**
 * Prints the given message, and terminates the entire process abnormally.
 *
 * @param  mesg  The message to display.
 */
#define RUBY_ASSERT_FAIL(mesg) \
    rb_assert_failure(__FILE__, __LINE__, RBIMPL_ASSERT_FUNC, mesg)

/**
 * Asserts that the expression is truthy.  If not aborts with the message.
 *
 * @param  expr  What supposedly evaluates to true.
 * @param  mesg  The message to display on failure.
 */
#define RUBY_ASSERT_MESG(expr, mesg) \
    (RB_LIKELY(expr) ? RBIMPL_ASSERT_NOTHING : RUBY_ASSERT_FAIL(mesg))

/**
 * A variant of #RUBY_ASSERT that does not interface with #RUBY_DEBUG.
 *
 * @copydetails #RUBY_ASSERT
 */
#define RUBY_ASSERT_ALWAYS(expr) RUBY_ASSERT_MESG((expr), #expr)

/**
 * Asserts that the given expression is truthy iff #RUBY_DEBUG is truthy.
 *
 * @param  expr  What supposedly evaluates to true.
 */
#if RUBY_DEBUG
# define RUBY_ASSERT(expr) RUBY_ASSERT_MESG((expr), #expr)
#else
# define RUBY_ASSERT(expr) RBIMPL_ASSERT_NOTHING
#endif

/**
 * A  variant  of   #RUBY_ASSERT  that  interfaces  with   #NDEBUG  instead  of
 * #RUBY_DEBUG.  This almost resembles `assert`  C standard macro, except minor
 * implementation details.
 *
 * @copydetails #RUBY_ASSERT
 */
/* Currently  `RUBY_DEBUG == ! defined(NDEBUG)` is  always true.   There is  no
 * difference any longer between this one and `RUBY_ASSERT`. */
#if defined(NDEBUG)
# define RUBY_ASSERT_NDEBUG(expr) RBIMPL_ASSERT_NOTHING
#else
# define RUBY_ASSERT_NDEBUG(expr) RUBY_ASSERT_MESG((expr), #expr)
#endif

/**
 * @copydoc #RUBY_ASSERT_WHEN
 * @param  mesg  The message to display on failure.
 */
#if RUBY_DEBUG
# define RUBY_ASSERT_MESG_WHEN(cond, expr, mesg) RUBY_ASSERT_MESG((expr), (mesg))
#else
# define RUBY_ASSERT_MESG_WHEN(cond, expr, mesg) \
    ((cond) ? RUBY_ASSERT_MESG((expr), (mesg)) : RBIMPL_ASSERT_NOTHING)
#endif

/**
 * A variant  of #RUBY_ASSERT  that asserts when  either #RUBY_DEBUG  or `cond`
 * parameter is truthy.
 *
 * @param  cond  Extra condition that shall hold for assertion to take effect.
 * @param  expr  What supposedly evaluates to true.
 */
#define RUBY_ASSERT_WHEN(cond, expr) RUBY_ASSERT_MESG_WHEN((cond), (expr), #expr)

/**
 * This is either #RUBY_ASSERT or #RBIMPL_ASSUME, depending on #RUBY_DEBUG.
 *
 * @copydetails #RUBY_ASSERT
 */
#if RUBY_DEBUG
# define RBIMPL_ASSERT_OR_ASSUME(expr) RUBY_ASSERT_ALWAYS(expr)
#elif RBIMPL_COMPILER_BEFORE(Clang, 7, 0, 0)
# /* See commit 67d259c5dccd31fe49d417fec169977712ffdf10 */
# define RBIMPL_ASSERT_OR_ASSUME(expr) RBIMPL_ASSERT_NOTHING
#elif defined(RUBY_ASSERT_NOASSUME)
# /* See commit d300a734414ef6de7e8eb563b7cc4389c455ed08 */
# define RBIMPL_ASSERT_OR_ASSUME(expr) RBIMPL_ASSERT_NOTHING
#elif ! defined(RBIMPL_HAVE___ASSUME)
# define RBIMPL_ASSERT_OR_ASSUME(expr) RBIMPL_ASSERT_NOTHING
#else
# define RBIMPL_ASSERT_OR_ASSUME(expr) RBIMPL_ASSUME(expr)
#endif

#endif /* RUBY_ASSERT_H */

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