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Editorial Team
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Editorial Team
Asked: May 26, 20262026-05-26T13:19:08+00:00 2026-05-26T13:19:08+00:00

I want to do the equivalent of ::Infinity= 1.0/0 in a ruby extension which

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I want to do the equivalent of

::Infinity= 1.0/0

in a ruby extension which is written in C.

So far I have come up with

rb_const_set(rb_mKernel, rb_intern("Infinity"), rb_float_new(1.0/0));

which gives me a compiler warning due to division by zero. And

rb_const_set(rb_mKernel, rb_intern("Infinity"), rb_eval_string("1.0/0"));

which is ugly due to the usage of eval.

What is a clean proper solution to this?

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  1. Editorial Team
    Editorial Team
    2026-05-26T13:19:09+00:00Added an answer on May 26, 2026 at 1:19 pm

    I found the answer in this question.

    rb_const_set(rb_mKernel, rb_intern("Infinity"), rb_float_new(INFINITY));
    

    There are no compiler warnings for this.

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