diff options
Diffstat (limited to 'include/ruby/internal/intern/error.h')
| -rw-r--r-- | include/ruby/internal/intern/error.h | 248 |
1 files changed, 226 insertions, 22 deletions
diff --git a/include/ruby/internal/intern/error.h b/include/ruby/internal/intern/error.h index aa9fe2daba..11e147a121 100644 --- a/include/ruby/internal/intern/error.h +++ b/include/ruby/internal/intern/error.h @@ -17,44 +17,232 @@ * 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. + * 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" -#include "ruby/backward/2/attributes.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 -#define rb_exc_new3 rb_exc_new_str -#define rb_check_trusted rb_check_trusted -#define rb_check_trusted_inline rb_check_trusted + +#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 */ -VALUE rb_exc_new(VALUE, const char*, long); -VALUE rb_exc_new_cstr(VALUE, const char*); -VALUE rb_exc_new_str(VALUE, VALUE); -PRINTF_ARGS(NORETURN(void rb_loaderror(const char*, ...)), 1, 2); -PRINTF_ARGS(NORETURN(void rb_loaderror_with_path(VALUE path, const char*, ...)), 2, 3); -PRINTF_ARGS(NORETURN(void rb_name_error(ID, const char*, ...)), 2, 3); -PRINTF_ARGS(NORETURN(void rb_name_error_str(VALUE, const char*, ...)), 2, 3); -PRINTF_ARGS(NORETURN(void rb_frozen_error_raise(VALUE, const char*, ...)), 2, 3); -NORETURN(void rb_invalid_str(const char*, const char*)); -NORETURN(void rb_error_frozen(const char*)); -NORETURN(void rb_error_frozen_object(VALUE)); -void rb_error_untrusted(VALUE); -void rb_check_frozen(VALUE); -void rb_check_trusted(VALUE); + +/** + * 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); + +/** + * 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); -NORETURN(MJIT_STATIC void rb_error_arity(int, int, int)); + +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() -/* Does anyone use this? Remain not deleted for compatibility. */ +/** + * @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))) { \ @@ -62,6 +250,7 @@ RBIMPL_SYMBOL_EXPORT_END() } \ } while (0) +/** @alias{rb_check_frozen} */ static inline void rb_check_frozen_inline(VALUE obj) { @@ -69,8 +258,23 @@ rb_check_frozen_inline(VALUE 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) { |