unicode_fold.hpp File Reference

Unicode simple case-folding orbits for text-mode flags::icase. More...

#include "real/version.hpp"
#include <cstddef>
#include <cstdint>

Include dependency graph for unicode_fold.hpp:

Classes
struct	real::detail::fold_entry
	A code point and the other members of its case-fold orbit (up to 3; orbits <= 4). More...

Namespaces
namespace	real
	REAL's public API: real::regex, real::static_regex, real::flags and the match/iterator types built on them.
namespace	real::detail
	DFA construction internals: subset construction over a flattened NFA. Not a stable API.

Functions
constexpr std::size_t	real::detail::find_fold_lower_bound (std::uint32_t cp)
	Index of the first entry whose code point is at or after cp, or unicode_fold_table_size if none is. The seek half of find_fold_index, exposed on its own so a caller holding a RANGE enters the table once and walks forward instead of scanning it whole – see real::detail::unicode_casefold.
constexpr std::size_t	real::detail::find_fold_index (std::uint32_t cp)
	Binary-searches unicode_fold_table for cp; returns its index, or unicode_fold_table_size if cp is not cased. An index (not a pointer into the table) keeps this usable in a constant expression on every compiler — g++ rejects a &table[i] != nullptr comparison inside a static_regex. Shared by the parser (is a literal cased?) and the compiler (its fold partners).

Variables
constexpr const char *	real::detail::unicode_fold_unidata_version {"16.0.0"}
	The Unicode data version these orbits were generated from.
constexpr fold_entry	real::detail::unicode_fold_table []
	Fold orbits, sorted by fold_entry::cp for binary search.
constexpr std::size_t	real::detail::unicode_fold_table_size {2940}
	Number of entries in unicode_fold_table.

Detailed Description

Unicode simple case-folding orbits for text-mode flags::icase.

GENERATED by tools/gen_unicode_fold.py – DO NOT EDIT BY HAND.

Each entry maps a code point to the other members of its case-fold orbit (the set that matches it under IGNORECASE). Built from, and exhaustively validated against, CPython's own case-insensitive matching, so REAL's text-mode icase is identical to re.IGNORECASE by construction. Unicode data version: 16.0.0 (asserted at compile time).