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Editorial Team
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Asked: 2026-06-17T13:42:33+00:00

I’m trying to understand the method lookup chain for FalseClass. Since FalseClass has Object

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I’m trying to understand the method lookup chain for FalseClass. Since FalseClass has Object for an ancestor, shouldn’t it also have access to the new method?

Has new been excluded from the lookup? Or do I misunderstand inheritance?

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1 Answer

  1. Editorial Team

    There’s only a single instance of FalseClass; of what value would new be?

    To answer your question, from object.c:

    rb_cFalseClass = rb_define_class("FalseClass", rb_cObject);
rb_define_method(rb_cFalseClass, "to_s", false_to_s, 0);
rb_define_method(rb_cFalseClass, "&", false_and, 1);
rb_define_method(rb_cFalseClass, "|", false_or, 1);
rb_define_method(rb_cFalseClass, "^", false_xor, 1);
rb_undef_alloc_func(rb_cFalseClass);
rb_undef_method(CLASS_OF(rb_cFalseClass), "new");

    new is specifically undefined.

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