Question

What is the purpose of using access modifier mutable?

Cosmo · Accepted Answer

C ++ Standard - ANSI ISO IEC 14882 2003 § 7.1.1.9 The mutable specifier on a class data member nullifies a const specifier applied to the containing class object and permits modification of the mutable class member even though the rest of the object is const

Cosmo · Accepted Answer

To allow modification of the class member which belongs to a constant object

Cosmo · Answer

For the same purpose as a const keyword in C

Cosmo · Answer

There is no such modifier in C ++

Cosmo · Answer

To allow modification of a static member of the class

Cosmo · Answer

For the same purposes as the volatile modifier

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