Cannot convert 'this' pointer from 'const Foo' to 'Foo&' error

Question

Hi Everyone i have a class Foo having a fooAddress member variable

Code in foo.h

Class Foo { String fooAddress() const; void setFooAddress(String fooAddress) .... String m_fooAddress; }

Code in foo.cpp

String Foo::fooAddress() const { return m_fooAddress; } void Foo::setFooAddress(String fooAddress) { m_fooAddress = fooAddress; }

Now i have a FooList Class which has a list of foos

Code in FooList.h

class FooList { editFooList(Foo foo,int index); ... private: List<Foo> m_fooArray; }

Now my code in FooList.cpp is

void FooList::editFooList(Foo foo, int index) { m_fooArray.at(index).setFooAddress(foo.fooAddress()); }

but i am getting the error error: C2662: 'void Foo::setFooAddress(String)' : cannot convert 'this' pointer from 'const Foo' to 'Foo &'

Since i have not defined editFooList as a const function,i am not sure why the compiler is complaining when i am trying to modify m_fooArray.Can someone please point me what i am doing wrong ?

Is your C++ reproduced in this posting accurately? Your code has foo:: rather than Foo::. Also I'm seeing QString rather than String in places. Are you using Qt instead of the STL? — Dai
– Dai, Commented Nov 18, 2014 at 0:09
Is List<> and alias for QList<>. QList.at() returns a const reference. — brycem
– brycem, Commented Nov 18, 2014 at 0:23

bourne · Accepted Answer · 2014-11-18 00:32:11Z

0

i changed my code to

void FooList::editFooList(Foo foo, int index) { m_fooArray[index].setFooAddress(foo.fooAddress()); }

and it is compiling now

answered Nov 18, 2014 at 0:32

bourne

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1 Comment

Neil Kirk Over a year ago

This will copy the foo object, which doesn't seem very efficient.

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