Why isn’t a final variable always a constant expression?

From the JLS A blank final is a final variable whose declaration lacks an initializer. A constant variable is a final variable of primitive type or type String that is initialized with a constant expression (ยง15.28). Your variable final int a; is a blank final variable. It lacks an initializer. The second paragraph doesn’t apply … Read more

Declaring a variable with two types: “int char”

It’s a mistake in the book. That is not a valid C++ declaration, even without the supposed narrowing conversion. It isn’t mentioned in any of the erratas on Bjarne Stroustrup’s page(4th printing and earlier), though, which is odd. It’s a clear enough mistake. I imagine since it’s commented with //error few people notice the mistake … Read more

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