diff options
Diffstat (limited to 'include/ruby/internal/intern/error.h')
| -rw-r--r-- | include/ruby/internal/intern/error.h | 291 |
1 files changed, 291 insertions, 0 deletions
diff --git a/include/ruby/internal/intern/error.h b/include/ruby/internal/intern/error.h new file mode 100644 index 0000000000..1fd9ec2f51 --- /dev/null +++ b/include/ruby/internal/intern/error.h @@ -0,0 +1,291 @@ +#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); + +void rb_str_modify(VALUE str); + +RBIMPL_SYMBOL_EXPORT_END() + +/** + * @deprecated + * + * Does anyone use this? Remain not deleted for compatibility. + */ +#define rb_check_frozen_internal rb_check_frozen + +/** @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); + } + + /* ref: internal CHILLED_STRING_P() + This is an implementation detail subject to change. */ + if (RB_UNLIKELY(RB_TYPE_P(obj, T_STRING) && FL_TEST_RAW(obj, RUBY_FL_USER2 | RUBY_FL_USER3))) { // STR_CHILLED + rb_str_modify(obj); + } +} + +/* rb_check_frozen() is available as a symbol, but have + * the inline version take priority for native consumers. */ +#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 */ |