ruby internal technology question

From	aotto1968 <aotto1968@t-online.de>
Newsgroups	comp.lang.ruby
Subject	ruby internal technology question
Date	2024-09-27 09:52 +0200
Organization	A noiseless patient Spider
Message-ID	<vd5o8f$lcmi$1@dont-email.me> (permalink)

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Hi, the following code from "symbol.h"

#if defined(HAVE_STMT_AND_DECL_IN_EXPR)
/* __builtin_constant_p and statement expression is available
  * since gcc-2.7.2.3 at least. */
#define rb_intern(str) \
     (RBIMPL_CONSTANT_P(str) ? \
      __extension__ ({ \
          static ID rbimpl_id; \
          rbimpl_intern_const(&rbimpl_id, (str)); \
      }) : \
      (rb_intern)(str))
#endif

#endif /* RBIMPL_SYMBOL_H */

uses

static ID rbimpl_id;

just to provide storage for the ID, why?

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ruby internal technology question aotto1968 <aotto1968@t-online.de> - 2024-09-27 09:52 +0200

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