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#ifndef RUBY_BACKWARD_CXXANYARGS_HPP // -*- C++ -*-
#define RUBY_BACKWARD_CXXANYARGS_HPP
/// @file
/// @brief Provides old prototypes for C++ programs.
/// @author \@shyouhei
/// @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.
/// @note DO NOT MODERNIZE THIS FILE! As the file name implies it is
/// meant to be a backwards compatibility shim. Please stick to
/// C++ 98 and never use newer features, like `constexpr`.
/// @brief The main namespace.
/// @note The name "ruby" might already be taken, but that must not be a
/// problem because namespaces are allowed to reopen.
namespace ruby {
/// @brief Backwards compatibility layer.
namespace backward {
/// @brief Provides ANYARGS deprecation warnings.
///
/// In C, ANYARGS means there is no function prototype. Literally anything,
/// even including nothing, can be a valid ANYARGS. So passing a correctly
/// prototyped function pointer to an ANYARGS-ed function parameter is valid,
/// at the same time passing an ANYARGS-ed function pointer to a granular typed
/// function parameter is also valid. However on the other hand in C++,
/// ANYARGS doesn't actually mean any number of arguments. C++'s ANYARGS means
/// _variadic_ number of arguments. This is incompatible with ordinal, correct
/// function prototypes.
///
/// Luckily, function prototypes being distinct each other means they can be
/// overloaded. We can provide a compatibility layer for older Ruby APIs which
/// used to have ANYARGS. This namespace includes such attempts.
namespace cxxanyargs {
/// @brief ANYARGS-ed function type.
typedef VALUE type(ANYARGS);
/// @brief ANYARGS-ed function type, void variant.
typedef void void_type(ANYARGS);
/// @brief ANYARGS-ed function type, int variant.
typedef int int_type(ANYARGS);
/// @name Hooking global variables
/// @{
RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
/// @brief Define a function-backended global variable.
/// @param[in] q Name of the variable.
/// @param[in] w Getter function.
/// @param[in] e Setter function.
/// @note Both functions can be nullptr.
/// @see rb_define_hooked_variable()
/// @deprecated Use glanular typed overload instead.
inline void
rb_define_virtual_variable(const char *q, type *w, void_type *e)
{
rb_gvar_getter_t *r = reinterpret_cast<rb_gvar_getter_t*>(w);
rb_gvar_setter_t *t = reinterpret_cast<rb_gvar_setter_t*>(e);
::rb_define_virtual_variable(q, r, t);
}
RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
/// @brief Define a function-backended global variable.
/// @param[in] q Name of the variable.
/// @param[in] w Getter function.
/// @param[in] e Setter function.
/// @note Both functions can be nullptr.
/// @see rb_define_hooked_variable()
/// @deprecated Use glanular typed overload instead.
inline void
rb_define_virtual_variable(const char *q, rb_gvar_getter_t *w, void_type *e)
{
rb_gvar_setter_t *t = reinterpret_cast<rb_gvar_setter_t*>(e);
::rb_define_virtual_variable(q, w, t);
}
RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
/// @brief Define a function-backended global variable.
/// @param[in] q Name of the variable.
/// @param[in] w Getter function.
/// @param[in] e Setter function.
/// @note Both functions can be nullptr.
/// @see rb_define_hooked_variable()
/// @deprecated Use glanular typed overload instead.
inline void
rb_define_virtual_variable(const char *q, type *w, rb_gvar_setter_t *e)
{
rb_gvar_getter_t *r = reinterpret_cast<rb_gvar_getter_t*>(w);
::rb_define_virtual_variable(q, r, e);
}
RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
/// @brief Define a function-backended global variable.
/// @param[in] q Name of the variable.
/// @param[in] w Variable storage.
/// @param[in] e Getter function.
/// @param[in] r Setter function.
/// @note Both functions can be nullptr.
/// @see rb_define_virtual_variable()
/// @deprecated Use glanular typed overload instead.
inline void
rb_define_hooked_variable(const char *q, VALUE *w, type *e, void_type *r)
{
rb_gvar_getter_t *t = reinterpret_cast<rb_gvar_getter_t*>(e);
rb_gvar_setter_t *y = reinterpret_cast<rb_gvar_setter_t*>(r);
::rb_define_hooked_variable(q, w, t, y);
}
RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
/// @brief Define a function-backended global variable.
/// @param[in] q Name of the variable.
/// @param[in] w Variable storage.
/// @param[in] e Getter function.
/// @param[in] r Setter function.
/// @note Both functions can be nullptr.
/// @see rb_define_virtual_variable()
/// @deprecated Use glanular typed overload instead.
inline void
rb_define_hooked_variable(const char *q, VALUE *w, rb_gvar_getter_t *e, void_type *r)
{
rb_gvar_setter_t *y = reinterpret_cast<rb_gvar_setter_t*>(r);
::rb_define_hooked_variable(q, w, e, y);
}
RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
/// @brief Define a function-backended global variable.
/// @param[in] q Name of the variable.
/// @param[in] w Variable storage.
/// @param[in] e Getter function.
/// @param[in] r Setter function.
/// @note Both functions can be nullptr.
/// @see rb_define_virtual_variable()
/// @deprecated Use glanular typed overload instead.
inline void
rb_define_hooked_variable(const char *q, VALUE *w, type *e, rb_gvar_setter_t *r)
{
rb_gvar_getter_t *t = reinterpret_cast<rb_gvar_getter_t*>(e);
::rb_define_hooked_variable(q, w, t, r);
}
/// @}
/// @name Exceptions and tag jumps
/// @{
RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
/// @brief Old way to implement iterators.
/// @param[in] q A function that can yield.
/// @param[in] w Passed to `q`.
/// @param[in] e What is to be yielded.
/// @param[in] r Passed to `e`.
/// @return The return value of `q`.
/// @note `e` can be nullptr.
/// @deprecated This function is obsolated since long before 2.x era. Do not
/// use it any longer. rb_block_call() is provided instead.
inline VALUE
rb_iterate(VALUE(*q)(VALUE), VALUE w, type *e, VALUE r)
{
rb_block_call_func_t t = reinterpret_cast<rb_block_call_func_t>(e);
return ::rb_iterate(q, w, t, r);
}
RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
/// @brief Call a method with a block.
/// @param[in] q The self.
/// @param[in] w The method.
/// @param[in] e The # of elems of `r`
/// @param[in] r The arguments.
/// @param[in] t What is to be yielded.
/// @param[in] y Passed to `t`
/// @return Return value of `q#w(*r,&t)`
/// @note 't' can be nullptr.
/// @deprecated Use glanular typed overload instead.
inline VALUE
rb_block_call(VALUE q, ID w, int e, const VALUE *r, type *t, VALUE y)
{
rb_block_call_func_t u = reinterpret_cast<rb_block_call_func_t>(t);
return ::rb_block_call(q, w, e, r, u, y);
}
RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
/// @brief An equivalent of `rescue` clause.
/// @param[in] q A function that can raise.
/// @param[in] w Passed to `q`.
/// @param[in] e A function that cleans-up.
/// @param[in] r Passed to `e`.
/// @return The return value of `q` if no exception occurs, or the return
/// value of `e` if otherwise.
/// @note `e` can be nullptr.
/// @see rb_ensure()
/// @see rb_rescue2()
/// @see rb_protect()
/// @deprecated Use glanular typed overload instead.
inline VALUE
rb_rescue(type *q, VALUE w, type *e, VALUE r)
{
typedef VALUE func1_t(VALUE);
typedef VALUE func2_t(VALUE, VALUE);
func1_t *t = reinterpret_cast<func1_t*>(q);
func2_t *y = reinterpret_cast<func2_t*>(e);
return ::rb_rescue(t, w, y, r);
}
RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
/// @brief An equivalent of `rescue` clause.
/// @param[in] q A function that can raise.
/// @param[in] w Passed to `q`.
/// @param[in] e A function that cleans-up.
/// @param[in] r Passed to `e`.
/// @param[in] ... 0-terminated list of subclass of @ref rb_eException.
/// @return The return value of `q` if no exception occurs, or the return
/// value of `e` if otherwise.
/// @note `e` can be nullptr.
/// @see rb_ensure()
/// @see rb_rescue()
/// @see rb_protect()
/// @deprecated Use glanular typed overload instead.
inline VALUE
rb_rescue2(type *q, VALUE w, type *e, VALUE r, ...)
{
typedef VALUE func1_t(VALUE);
typedef VALUE func2_t(VALUE, VALUE);
func1_t *t = reinterpret_cast<func1_t*>(q);
func2_t *y = reinterpret_cast<func2_t*>(e);
va_list ap;
va_start(ap, r);
VALUE ret = ::rb_vrescue2(t, w, y, r, ap);
va_end(ap);
return ret;
}
RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
/// @brief An equivalent of `ensure` clause.
/// @param[in] q A function that can raise.
/// @param[in] w Passed to `q`.
/// @param[in] e A function that ensures.
/// @param[in] r Passed to `e`.
/// @return The return value of `q`.
/// @note It makes no sense to pass nullptr to `e`.
/// @see rb_rescue()
/// @see rb_rescue2()
/// @see rb_protect()
/// @deprecated Use glanular typed overload instead.
inline VALUE
rb_ensure(type *q, VALUE w, type *e, VALUE r)
{
typedef VALUE func1_t(VALUE);
func1_t *t = reinterpret_cast<func1_t*>(q);
func1_t *y = reinterpret_cast<func1_t*>(e);
return ::rb_ensure(t, w, y, r);
}
RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
/// @brief An equivalent of `Kernel#catch`.
/// @param[in] q The "tag" string.
/// @param[in] w A function that can throw.
/// @param[in] e Passed to `w`.
/// @return What was thrown.
/// @note `q` can be a nullptr but makes no sense to pass nullptr to`w`.
/// @see rb_block_call()
/// @see rb_protect()
/// @see rb_rb_catch_obj()
/// @see rb_rescue()
/// @deprecated Use glanular typed overload instead.
inline VALUE
rb_catch(const char *q, type *w, VALUE e)
{
rb_block_call_func_t r = reinterpret_cast<rb_block_call_func_t>(w);
return ::rb_catch(q, r, e);
}
RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
/// @brief An equivalent of `Kernel#catch`.
/// @param[in] q The "tag" object.
/// @param[in] w A function that can throw.
/// @param[in] e Passed to `w`.
/// @return What was thrown.
/// @note It makes no sense to pass nullptr to`w`.
/// @see rb_block_call()
/// @see rb_protect()
/// @see rb_rb_catch_obj()
/// @see rb_rescue()
/// @deprecated Use glanular typed overload instead.
inline VALUE
rb_catch_obj(VALUE q, type *w, VALUE e)
{
rb_block_call_func_t r = reinterpret_cast<rb_block_call_func_t>(w);
return ::rb_catch_obj(q, r, e);
}
/// @}
/// @name Procs, Fibers and Threads
/// @{
RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
/// @brief Creates a @ref rb_cFiber instance.
/// @param[in] q The fiber body.
/// @param[in] w Passed to `q`.
/// @return What was allocated.
/// @note It makes no sense to pass nullptr to`q`.
/// @see rb_proc_new()
/// @see rb_thread_creatr()
/// @deprecated Use glanular typed overload instead.
inline VALUE
rb_fiber_new(type *q, VALUE w)
{
rb_block_call_func_t e = reinterpret_cast<rb_block_call_func_t>(q);
return ::rb_fiber_new(e, w);
}
RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
/// @brief Creates a @ref rb_cProc instance.
/// @param[in] q The proc body.
/// @param[in] w Passed to `q`.
/// @return What was allocated.
/// @note It makes no sense to pass nullptr to`q`.
/// @see rb_fiber_new()
/// @see rb_thread_creatr()
/// @deprecated Use glanular typed overload instead.
inline VALUE
rb_proc_new(type *q, VALUE w)
{
rb_block_call_func_t e = reinterpret_cast<rb_block_call_func_t>(q);
return ::rb_proc_new(e, w);
}
RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
/// @brief Creates a @ref rb_cThread instance.
/// @param[in] q The thread body.
/// @param[in] w Passed to `q`.
/// @return What was allocated.
/// @note It makes no sense to pass nullptr to`q`.
/// @see rb_proc_new()
/// @see rb_fiber_new()
/// @deprecated Use glanular typed overload instead.
inline VALUE
rb_thread_create(type *q, void *w)
{
typedef VALUE ptr_t(void*);
ptr_t *e = reinterpret_cast<ptr_t*>(q);
return ::rb_thread_create(e, w);
}
/// @}
/// @name Hash and st_table
/// @{
RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
/// @brief Iteration over the given table.
/// @param[in] q A table to scan.
/// @param[in] w A function to iterate.
/// @param[in] e Passed to `w`.
/// @retval 0 Always returns 0.
/// @note It makes no sense to pass nullptr to`w`.
/// @see st_foreach_check()
/// @see rb_hash_foreach()
/// @deprecated Use glanular typed overload instead.
inline int
st_foreach(st_table *q, int_type *w, st_data_t e)
{
st_foreach_callback_func *r =
reinterpret_cast<st_foreach_callback_func*>(w);
return ::st_foreach(q, r, e);
}
RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
/// @brief Iteration over the given table.
/// @param[in] q A table to scan.
/// @param[in] w A function to iterate.
/// @param[in] e Passed to `w`.
/// @retval 0 Successful end of iteration.
/// @retval 1 Element removed during traversing.
/// @note It makes no sense to pass nullptr to`w`.
/// @see st_foreach()
/// @deprecated Use glanular typed overload instead.
inline int
st_foreach_check(st_table *q, int_type *w, st_data_t e, st_data_t)
{
st_foreach_check_callback_func *t =
reinterpret_cast<st_foreach_check_callback_func*>(w);
return ::st_foreach_check(q, t, e, 0);
}
RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
/// @brief Iteration over the given table.
/// @param[in] q A table to scan.
/// @param[in] w A function to iterate.
/// @param[in] e Passed to `w`.
/// @note It makes no sense to pass nullptr to`w`.
/// @see st_foreach_check()
/// @deprecated Use glanular typed overload instead.
inline void
st_foreach_safe(st_table *q, int_type *w, st_data_t e)
{
st_foreach_callback_func *r =
reinterpret_cast<st_foreach_callback_func*>(w);
::st_foreach_safe(q, r, e);
}
RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
/// @brief Iteration over the given hash.
/// @param[in] q A hash to scan.
/// @param[in] w A function to iterate.
/// @param[in] e Passed to `w`.
/// @note It makes no sense to pass nullptr to`w`.
/// @see st_foreach()
/// @deprecated Use glanular typed overload instead.
inline void
rb_hash_foreach(VALUE q, int_type *w, VALUE e)
{
st_foreach_callback_func *r =
reinterpret_cast<st_foreach_callback_func*>(w);
::rb_hash_foreach(q, r, e);
}
RUBY_CXX_DEPRECATED("Use of ANYARGS in this function is deprecated")
/// @brief Iteration over each instance variable of the object.
/// @param[in] q An object.
/// @param[in] w A function to iterate.
/// @param[in] e Passed to `w`.
/// @note It makes no sense to pass nullptr to`w`.
/// @see st_foreach()
/// @deprecated Use glanular typed overload instead.
inline void
rb_ivar_foreach(VALUE q, int_type *w, VALUE e)
{
st_foreach_callback_func *r =
reinterpret_cast<st_foreach_callback_func*>(w);
::rb_ivar_foreach(q, r, e);
}
/// @}
}}}
using namespace ruby::backward::cxxanyargs;
#endif // RUBY_BACKWARD_CXXANYARGS_HPP