How do I declare/define a const of a nonconst function for overloading?
for example:
class A;
A &operator[](int idx);
const A &operator[](int idx) const;
Assume the definition for operator[] is not trivial.
class A;
A &operator[](int idx);
const A &operator[](int idx) const;
Assume the definition for operator[] is not trivial.
The code you posted is right.
Only it doesn't make sense for A::[] to return a type A. Typically the [] operator is used on container types, and it doesn't return the container but instead returns one element of whatever the container contains.
So like... vector<int> has a [] opreator. But it doesn't return a vector<int> because that doesn't make sense. Instead it returns an int (or an int&).
Only it doesn't make sense for A::[] to return a type A. Typically the [] operator is used on container types, and it doesn't return the container but instead returns one element of whatever the container contains.
So like... vector<int> has a [] opreator. But it doesn't return a vector<int> because that doesn't make sense. Instead it returns an int (or an int&).
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