binary'*'instead of unary'*'or pinning pointers error

[U238]

Help me solve such a problem with pointers, which I can't for two days plz. I call one class method and pass it one structure argument as const reference. Then I try to use this structure member iterator on pointer on class by derefferenicng it

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struct SAbilityDrawParams 
{ 
   list<class CAbility *>::Iterator ab; 
   ... 
}; 
void CInterface::drawAbilityTones( const SAbilityDrawParams &params ) 
{ 
   if( (*params.ab)->selfTonesChange[t] > maxSelfToneCh ) 
   ... 
} 

but get error message

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C2678 binary '*' : no operator defined which takes a left-hand operand of type 'const irr::core::list<T>::Iterator' (or there is no acceptable conversion) 

though I tried use unary '*'. Manual tells that this error can "occur if you do not pin a native member before calling a member function on it".
I tried to use pin pointers but no one of two variants pass through the same error

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   cli::pin_ptr<const list<CAbility *>::Iterator> p = &params.ab; 
   const irr::core::list<CAbility *>::Iterator ab = *p; 
   if( (*ab)->targetTonesChange[t] < minTargToneCh )

Code: Select all

   cli::pin_ptr<const list<CAbility *>::Iterator> p = &params.ab; 
   if( (**p)->targetTonesChange[t] < minTargToneCh )

I asked this question in beginners forum but nobody answered me for the period. Will be glad if you can help me

[U238]

Problem solved simply by defining non-constant iterator on paramater member

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	void CInterface::drawAbilityFull( const SAbilityDrawParams &params ) 
{
	list<CAbility *>::Iterator ab = params.ab;
	if( (*ab)->selfTonesChange[t] < minSelfCh )
	...
}