Function require
Requires that a value be provided and valid based on the delegate passed in. It must also check against null input.
auto num = require!(int, "a > 0 && a <= 10")("Enter a number from 1 to 10");
Prototype
T require(T, alias cond)( in string question, in string failure = null );
Throws
NoInputException if the user does not provide any value.
ConvError if the user does not provide any value.
Authors
Jesse Phillips
Copyright
Copyright Jesse Phillips 2010