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From: Thiago Adams <thiago.adams@gmail.com>
Newsgroups: comp.lang.c
Subject: Code guidelines
Date: Tue, 3 Sep 2024 09:22:20 -0300
Organization: A noiseless patient Spider
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Witch style (F1, F2 ..) better represents the guidelines of your code?


//The function f never returns nullptr
int * f();

void F1() {
    int* p = f();

    if (p == nullptr) {
       assert(false);
       return;
    }
    // using *p ...
}

void F2()
{
    int* p = f();
    assert(p != nullptr);
    // using *p ...
}

void F3()
{
    int* p = f();
    // using *p ...
}

void F4()
{
    int* p = f();
    if (p) {
     // using *p ...
    }
}



The same question but for struct members



struct user {

   //Name is required, cannot be null.
   char * name;
};

void F1(struct user* user) {

    if (user->name == nullptr) {
       assert(false);
       return;
    }
    // using user->name ...
}

void F2(struct user* user) {
    assert(user->name != nullptr);
    // using user->name ...
}

void F3(struct user* user) {
    // using user->name ...
}

void F4(struct user* user) {
    if (user->name) {
      // using user->name ...
    }
}