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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 */