[Dprglist] Help with C++ design patterns

[Carl Ott]

Cool thank guys -
Sounds like a valid design pattern but with garbled syntax...

On Sun, Mar 7, 2021 at 9:14 AM jesse brockmann <jjbrockm at gmail.com> wrote:

> In the class definition use
> otherClass *storedReferenceToOtherClass;
>
>
> And for the calls use
>
> storedReferenceToOtherClass->function ()
>
>
>
> On Sun, Mar 7, 2021, 8:32 AM Carl Ott via DPRGlist <
> dprglist at lists.dprg.org> wrote:
>
>>
>> Can somebody help with C++ design patterns?
>>
>> I have a class with many methods (first class), that needs access to
>> members of another class (other class).
>> Surely I can pass a reference to the other class into every method of the
>> first class.
>> But that seems like a verbose pain.
>> Instead, I'd like to initialize the first class with a reference or
>> pointer to the other class. Then the first class could use the cached
>> reference or pointer to the other class whenever it's needed.
>> However, I'm missing something - not getting it to work.
>>
>> Am I just missing syntax or am I fundamentally trying to implement an
>> anti-pattern?
>>
>> What are some best practices design patterns to accomplish this?  Any
>> recommendations - where to find a quick tutorial?
>>
>>
>> here's an abstract of what isn't working...
>>
>> class needsToStoreAreference
>> {
>>
>> public:
>>
>> cacheAreference(otherClass &desiredReference);
>>
>> private:
>>
>> otherClass &storedReferenceToOtherClass;
>>
>> }
>>
>> needsToStoreAreference::cacheAreference(otherClass &desiredReference)
>> {
>>
>> storedReferenceToOtherClass = desiredReference;
>>  // doesn't work, causes an Arduino program to hang
>>
>> }
>>
>>
>>
>> And in the calling code
>>
>> needsToStoreAreference instanceOfNeedsToStore(); // instance of 'first
>> class' in wording above
>>
>> otherClass instanceOfOtherClass(); // instance of 'other class' in
>> wording above
>>
>> instanceOfNeedsToStore.cacheAreference(instanceOfOtherClass);
>>
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>
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