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POconst object& return value from a method, best practice
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My C++ knowledge are minimal, for this i'm asking this: I have a pointer to an object of type <code>Ndb</code> and i do this: <pre><code>Ndb* myObj=new Ndb(); NdbError err=myObj->getNdbError(); //Do some work; //Finish the job delete(myObj); </code></pre> The method's signature for <code>getNdbError</code> is: <code>const NdbError& getNdbError() const</code> According to the signature, who must take care of free the memory for the <code>NdbError</code>? the <code>const</code> before <code>NdbError&</code> means that i can only read the result and i should not to anything else? I don't wont to leave some memory area allocated but not referenced. EDIT: According to the ansers its better to show more of this use case. I have a wrapper beetween a C++ object and C methods: <pre><code>void* WINAPI new_Ndb(void* cluster_connection,const char* catalogname,const char* schemaName) { Ndb_cluster_connection* co=(Ndb_cluster_connection*)cluster_connection; Ndb* tmpN=new Ndb(co,catalogname,schemaName); return (void*)tmpN; } void WINAPI Ndb_dispose(void* obj) { delete (Ndb*)obj; obj=0; } const ndberror_struct WINAPI Ndb_getNdbError(void* obj) { Ndb* tmp=(Ndb*)obj; NdbError res=tmp->getNdbError(); ndberror_struct tmpRes; tmpRes=(ndberror_struct)res; return tmpRes; } </code></pre> NdbError define an operator overloading: <pre><code> operator ndberror_struct() const { ndberror_struct ndberror; ndberror.status = (ndberror_status_enum) status; ndberror.classification = (ndberror_classification_enum) classification; ndberror.code = code; ndberror.mysql_code = mysql_code; ndberror.message = message; ndberror.details = details; return ndberror; } </code></pre> What will appen when i make a call to <code>const ndberror_struct WINAPI Ndb_getNdbError(void* obj)?</code> The Ndberror will go out of scope but i keep the data because are copied? <code>message</code> and <code>details</code> are <code>char*</code> so they will be freed when the return value ndb_error_struct will go out of scope?
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const object& return value from a method, best practice
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