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Home/ Questions/Q 4080784
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Editorial Team
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Editorial Team
Asked: May 20, 20262026-05-20T17:58:29+00:00 2026-05-20T17:58:29+00:00

Why is empty struct in C a constraint violation? Why does this rule get

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Why is empty struct in C a constraint violation? Why does this rule get changed in C++?

Are there any historical reasons?

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  1. Editorial Team
    Editorial Team
    2026-05-20T17:58:30+00:00Added an answer on May 20, 2026 at 5:58 pm

    since you don’t have inheritance in C you don’t need them. If you just want to have a distinguishable pointer type you can use pointers to incomplete types.

    struct opaque;
    
    struct opaque* stranger = 0;
    

    should work fine.

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