===(p1)
public
Case Equality—For class Object, effectively the same as calling
#==, but typically overridden by descendents to provide meaningful
semantics in case statements.
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/*
* call-seq:
* obj === other => true or false
*
* Case Equality---For class <code>Object</code>, effectively the same
* as calling <code>
* to provide meaningful semantics in <code>case</code> statements.
*/
VALUE
rb_equal(obj1, obj2)
VALUE obj1, obj2;
{
VALUE result;
if (obj1 == obj2) return Qtrue;
result = rb_funcall(obj1, id_eq, 1, obj2);
if (RTEST(result)) return Qtrue;
return Qfalse;
}