Issue #10214 has been updated by Nobuyoshi Nakada.


If an ID has been created by pinning down with `ID2SYM`, `rb_intern` returns that ID, and ditto for `Symbol`s.

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Feature #10214: new functions for compare of symbols in C API
https://bugs.ruby-lang.org/issues/10214#change-48727

* Author: Hans Mackowiak
* Status: Feedback
* Priority: Normal
* Assignee: 
* Category: core
* Target version: 
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currently i often use Symbols as enums in my bindings, 
have something like this with comparing symbols by their ID

~~~
if(SYMBOL_P(sym))
{
  if(rb_intern("name") == SYM2ID(sym))
    return ENUM_NAME;
}
~~~

now with dynamic symbols and other ones, its problematic because with that i always foce a dynamic symbol to become static or pinned (that what SYM2ID does)

so imo there need to be better ways to comare is an ID and a VALUE-sym or two VALUE-syms and check if they have the same content (hm because comparing two VALUE with == might/does not work) 



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