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include/ruby/internal/intern/range.h: add doxygen

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Must not be a bad idea to improve documents. [ci skip]
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卜部昌平 2021-02-25 14:39:57 +09:00
parent 7c8ad0a37d
commit 949220d9db
Notes: git 2021-09-10 20:01:34 +09:00
1 changed files with 56 additions and 2 deletions
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58
include/ruby/internal/intern/range.h
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@ -20,14 +20,68 @@
* extension libraries. They could be written in C++98.
* @brief Public APIs related to ::rb_cRange.
*/
#include "ruby/internal/attr/nonnull.h"
#include "ruby/internal/dllexport.h"
#include "ruby/internal/value.h"
RBIMPL_SYMBOL_EXPORT_BEGIN()
/* range.c */
VALUE rb_range_new(VALUE, VALUE, int);
VALUE rb_range_beg_len(VALUE, long*, long*, long, int);
/**
* Creates a new Range.
*
* @param[in] beg "Left" or "lowest" endpoint of the range.
* @param[in] end "Right" or "highest" endpoint of the range.
* @param[in] excl Whether the range is open-ended.
* @exception rb_eArgError `beg` and `end` are not comparable.
* @note These days both endpoints can be ::RUBY_Qnil, which means that
* endpoint is unbound.
*/
VALUE rb_range_new(VALUE beg, VALUE end, int excl);
RBIMPL_ATTR_NONNULL(())
/**
* Deconstructs a numerical range. As the arguments are `long` based, it
* expects everything are in the `long` domain.
*
* @param[in] range A range of numerical endpoints.
* @param[out] begp Return value buffer.
* @param[out] lenp Return value buffer.
* @param[in] len Updated length.
* @param[in] err In case `len` is out of range...
* - `0`: returns ::RUBY_Qnil.
* - `1`: raises ::rb_eRangeError.
* - `2`: `beg` and `len` expanded accordingly.
* @exception rb_eTypeError `range` is not a numerical range.
* @exception rb_eRangeError `range` cannot fit into `long`.
* @retval RUBY_Qfalse `range` is not an ::rb_cRange.
* @retval RUBY_Qnil `len` is out of `range` but `err` is zero.
* @retval RUBY_Qtrue Otherwise.
* @post `beg` is the (possibly updated) left endpoint.
* @post `len` is the (possibly updated) length of the range.
*
* @internal
*
* The complex error handling switch reflects the fact that `Array#[]=` and
* `String#[]=` behave differently when they take ranges.
*/
VALUE rb_range_beg_len(VALUE range, long *begp, long *lenp, long len, int err);
RBIMPL_ATTR_NONNULL(())
/**
* Deconstructs a range into its components.
*
* @param[in] range Range or range-ish object.
* @param[out] begp Return value buffer.
* @param[out] endp Return value buffer.
* @param[out] exclp Return value buffer.
* @retval RUBY_Qfalse `range` is not an instance of ::rb_cRange.
* @retval RUBY_Qtrue Argument pointers are updated.
* @post `*begp` is the left endpoint of the range.
* @post `*endp` is the right endpoint of the range.
* @post `*exclp` is whether the range is open-ended or not.
*/
int rb_range_values(VALUE range, VALUE *begp, VALUE *endp, int *exclp);
RBIMPL_SYMBOL_EXPORT_END()