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some_function(
    some_variable, some_other_variable, 
    and_yet_another_variable, and_one_more_for, luck
);

if( some_return_value = some_function( 
    some_variable, some_other_variable, 
...
} else {
   // report or otherwise handle the error 
}

if( 
    some_return_value = some_function( 
...
else {
   // report or otherwise handle the error 
}

if( someRv = fSome( some, oSome, AYAnother, OneMoreFor, luck )) {
    // do some stuff here with someRv 
...
else {
   // report or otherwise handle the error 
}