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+#ifndef RUBY_INTERNAL_ENCODING_RE_H /*-*-C++-*-vi:se ft=cpp:*/
+#define RUBY_INTERNAL_ENCODING_RE_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 Routines to manipulate encodings of symbols.
+ */
+
+#include "ruby/internal/dllexport.h"
+#include "ruby/internal/encoding/encoding.h"
+#include "ruby/internal/value.h"
+
+RBIMPL_SYMBOL_EXPORT_BEGIN()
+
+/**
+ * Identical to rb_reg_new(), except it additionally takes an encoding.
+ *
+ * @param[in] ptr A memory region of `len` bytes length.
+ * @param[in] len Length of `ptr`, in bytes, not including the
+ * terminating NUL character.
+ * @param[in] enc Encoding of `ptr`.
+ * @param[in] opts Options e.g. ONIG_OPTION_MULTILINE.
+ * @exception rb_eRegexpError Failed to compile `ptr`.
+ * @return An allocated new instance of ::rb_cRegexp, of `enc` encoding,
+ * whose expression is compiled according to `ptr`.
+ */
+VALUE rb_enc_reg_new(const char *ptr, long len, rb_encoding *enc, int opts);
+
+RBIMPL_SYMBOL_EXPORT_END()
+
+#endif /* RUBY_INTERNAL_ENCODING_RE_H */