Find character in string in Ada

Is there a simple way of checking whether a given charac开发者_运维百科ter is in a string?

I know that if the string was simply a range (say 'a'..'z') then I could have used the in operator, but I need something to the lines of char in "- _,.". What's the best way of doing so in Ada?

Use "Is_In" from the Ada.Strings.Maps package.