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#ifndef RBIMPL_INTERN_ERROR_H /*-*-C++-*-vi:se ft=cpp:*/
#define RBIMPL_INTERN_ERROR_H
/**
* @file
* @author Ruby developers <ruby-core@ruby-lang.org>
* @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.
* @brief Public APIs related to ::rb_eException.
*/
#include "ruby/internal/attr/format.h"
#include "ruby/internal/attr/noreturn.h"
#include "ruby/internal/dllexport.h"
#include "ruby/internal/value.h"
#include "ruby/internal/fl_type.h"
#include "ruby/backward/2/assume.h"
/**
* This macro is used in conjunction with rb_check_arity(). If you pass it to
* the function's last (max) argument, that means the function does not check
* upper limit.
*/
#define UNLIMITED_ARGUMENTS (-1)
#define rb_exc_new2 rb_exc_new_cstr /**< @old{rb_exc_new_cstr} */
#define rb_exc_new3 rb_exc_new_str /**< @old{rb_exc_new_str} */
/** @cond INTERNAL_MACRO */
#define rb_check_arity rb_check_arity
/** @endcond */
RBIMPL_SYMBOL_EXPORT_BEGIN()
/* error.c */
/**
* Creates an instance of the passed exception class.
*
* @param[in] etype A subclass of ::rb_eException.
* @param[in] ptr Buffer contains error message.
* @param[in] len Length of `ptr`, in bytes, not including the
* terminating NUL character.
* @exception rb_eTypeError `etype` is not a class.
* @exception rb_eArgError `len` is negative.
* @return An instance of `etype`.
* @pre At least `len` bytes of continuous memory region shall be
* accessible via `ptr`.
*
* @internal
*
* This function works for non-exception classes as well, as long as they take
* one string argument.
*/
VALUE rb_exc_new(VALUE etype, const char *ptr, long len);
RBIMPL_ATTR_NONNULL(())
/**
* Identical to rb_exc_new(), except it assumes the passed pointer is a pointer
* to a C string.
*
* @param[in] etype A subclass of ::rb_eException.
* @param[in] str A C string (becomes an error message).
* @exception rb_eTypeError `etype` is not a class.
* @return An instance of `etype`.
*/
VALUE rb_exc_new_cstr(VALUE etype, const char *str);
/**
* Identical to rb_exc_new_cstr(), except it takes a Ruby's string instead of
* C's.
*
* @param[in] etype A subclass of ::rb_eException.
* @param[in] str An instance of ::rb_cString.
* @exception rb_eTypeError `etype` is not a class.
* @return An instance of `etype`.
*/
VALUE rb_exc_new_str(VALUE etype, VALUE str);
RBIMPL_ATTR_NORETURN()
RBIMPL_ATTR_NONNULL((1))
RBIMPL_ATTR_FORMAT(RBIMPL_PRINTF_FORMAT, 1, 2)
/**
* Raises an instance of ::rb_eLoadError.
*
* @param[in] fmt Format specifier string compatible with rb_sprintf().
* @exception rb_eLoadError Always raises this.
* @note It never returns.
*
* @internal
*
* Who needs this? Except ruby itself?
*/
void rb_loaderror(const char *fmt, ...);
RBIMPL_ATTR_NORETURN()
RBIMPL_ATTR_NONNULL((2))
RBIMPL_ATTR_FORMAT(RBIMPL_PRINTF_FORMAT, 2, 3)
/**
* Identical to rb_loaderror(), except it additionally takes which file is
* unable to load. The path can be obtained later using `LoadError#path` of
* the raising exception.
*
* @param[in] path What failed.
* @param[in] fmt Format specifier string compatible with rb_sprintf().
* @exception rb_eLoadError Always raises this.
* @note It never returns.
*/
void rb_loaderror_with_path(VALUE path, const char *fmt, ...);
RBIMPL_ATTR_NORETURN()
RBIMPL_ATTR_NONNULL((2))
RBIMPL_ATTR_FORMAT(RBIMPL_PRINTF_FORMAT, 2, 3)
/**
* Raises an instance of ::rb_eNameError. The name can be obtained later using
* `NameError#name` of the raising exception.
*
* @param[in] name What failed.
* @param[in] fmt Format specifier string compatible with rb_sprintf().
* @exception rb_eNameError Always raises this.
* @note It never returns.
*/
void rb_name_error(ID name, const char *fmt, ...);
RBIMPL_ATTR_NORETURN()
RBIMPL_ATTR_NONNULL((2))
RBIMPL_ATTR_FORMAT(RBIMPL_PRINTF_FORMAT, 2, 3)
/**
* Identical to rb_name_error(), except it takes a ::VALUE instead of ::ID.
*
* @param[in] name What failed.
* @param[in] fmt Format specifier string compatible with rb_sprintf().
* @exception rb_eNameError Always raises this.
* @note It never returns.
*/
void rb_name_error_str(VALUE name, const char *fmt, ...);
RBIMPL_ATTR_NORETURN()
RBIMPL_ATTR_NONNULL((2))
RBIMPL_ATTR_FORMAT(RBIMPL_PRINTF_FORMAT, 2, 3)
/**
* Raises an instance of ::rb_eFrozenError. The object can be obtained later
* using `FrozenError#receiver` of the raising exception.
*
* @param[in] recv What is frozen.
* @param[in] fmt Format specifier string compatible with rb_sprintf().
* @exception rb_eFrozenError Always raises this.
* @note It never returns.
*
* @internal
*
* Note however, that it is often not possible to inspect a frozen object,
* because the inspection itself could be forbidden by the frozen-ness.
*/
void rb_frozen_error_raise(VALUE recv, const char *fmt, ...);
RBIMPL_ATTR_NORETURN()
RBIMPL_ATTR_NONNULL(())
/**
* Honestly I don't understand the name, but it raises an instance of
* ::rb_eArgError.
*
* @param[in] str A message.
* @param[in] type Another message.
* @exception rb_eArgError Always raises this.
* @note It never returns.
*/
void rb_invalid_str(const char *str, const char *type);
RBIMPL_ATTR_NORETURN()
RBIMPL_ATTR_NONNULL(())
/**
* Identical to rb_frozen_error_raise(), except its raising exception has a
* message like "can't modify frozen /what/".
*
* @param[in] what What was frozen.
* @exception rb_eFrozenError Always raises this.
* @note It never returns.
*/
void rb_error_frozen(const char *what);
RBIMPL_ATTR_NORETURN()
/**
* Identical to rb_error_frozen(), except it takes arbitrary Ruby object
* instead of C's string.
*
* @param[in] what What was frozen.
* @exception rb_eFrozenError Always raises this.
* @note It never returns.
*/
void rb_error_frozen_object(VALUE what);
/**
* Queries if the passed object is frozen.
*
* @param[in] obj Target object to test frozen-ness.
* @exception rb_eFrozenError It is frozen.
* @post Upon successful return it is guaranteed _not_ frozen.
*/
void rb_check_frozen(VALUE obj);
/**
* Ensures that the passed object can be `initialize_copy` relationship. When
* you implement your own one you would better call this at the right beginning
* of your implementation.
*
* @param[in] obj Destination object.
* @param[in] orig Source object.
* @exception rb_eFrozenError `obj` is frozen.
* @post Upon successful return obj is guaranteed safe to copy orig.
*/
void rb_check_copyable(VALUE obj, VALUE orig);
RBIMPL_ATTR_NORETURN()
/**
* @private
*
* This is an implementation detail of rb_scan_args(). You don't have to
* bother.
*
* @pre `argc` is out of range of `min`..`max`, both inclusive.
* @param[in] argc Arbitrary integer.
* @param[in] min Minimum allowed `argc`.
* @param[in] max Maximum allowed `argc`.
* @exception rb_eArgError Always.
*/
void rb_error_arity(int argc, int min, int max);
RBIMPL_SYMBOL_EXPORT_END()
/**
* @deprecated
*
* Does anyone use this? Remain not deleted for compatibility.
*/
#define rb_check_frozen_internal(obj) do { \
VALUE frozen_obj = (obj); \
if (RB_UNLIKELY(RB_OBJ_FROZEN(frozen_obj))) { \
rb_error_frozen_object(frozen_obj); \
} \
} while (0)
/** @alias{rb_check_frozen} */
static inline void
rb_check_frozen_inline(VALUE obj)
{
if (RB_UNLIKELY(RB_OBJ_FROZEN(obj))) {
rb_error_frozen_object(obj);
}
}
/** @alias{rb_check_frozen} */
#define rb_check_frozen rb_check_frozen_inline
/**
* Ensures that the passed integer is in the passed range. When you can use
* rb_scan_args() that is preferred over this one (powerful, descriptive). But
* it can have its own application area.
*
* @param[in] argc Arbitrary integer.
* @param[in] min Minimum allowed `argv`.
* @param[in] max Maximum allowed `argv`, or `UNLIMITED_ARGUMENTS`.
* @exception rb_eArgError `argc` out of range.
* @return The passed `argc`.
* @post Upon successful return `argc` is in range of `min`..`max`, both
* inclusive.
*/
static inline int
rb_check_arity(int argc, int min, int max)
{
if ((argc < min) || (max != UNLIMITED_ARGUMENTS && argc > max))
rb_error_arity(argc, min, max);
return argc;
}
#endif /* RBIMPL_INTERN_ERROR_H */