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I want to create a non-const copy of a variable. I am doing this inside a templated function, which has an in ref input, so the type (T) has the const set. I see a ConstOf function in https://dlang.org/phobos/std_traits.html but I cannot find an inverse so I can get a non-const type from T.
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Constants are block-scoped, much like variables declared using the let keyword. The value of a constant can't be changed through reassignment (i.e. by using the assignment operator), and it can't be redeclared (i.e. through a variable declaration).
We use the const qualifier to declare a variable as constant. That means that we cannot change the value once the variable has been initialized. Using const has a very big benefit. For example, if you have a constant value of the value of PI, you wouldn't like any part of the program to modify that value.
Overview. A constant is a value that cannot be altered by the program during normal execution, i.e., the value is constant.
The const keyword allows a programmer to tell the compiler that a particular variable should not be modified after the initial assignment in its declaration.
You might be interested in
std.traits.Unqual.
Note that this gives the type with all qualifiers removed, not just const.
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