ensure

Provides some convenience functionality for parsing command-line arguments by piggy-backing off std.getopt.

Members

isNullable eponymoustemplate isNullable(T): Tests if a type can null. Not related to std.typecons.Nullable!T.
nameof eponymoustemplate nameof(alias symbol): A convenience wrapper for __traits( identifier, ... ).

between Arg!N between(Arg!N arg, N lowerBound, N upperBound): Ensures that a number is between an upper bound and a lower bound.
ensure Arg!(typeof(what)) ensure(): Wrap a function argument to perform validation.
isNotEmpty Arg!T isNotEmpty(Arg!T arg): Ensures that an array is not empty.
isNotEmpty Arg!T isNotEmpty(Arg!T arg): Ensures that a range is not empty.
isNotNull Arg!T isNotNull(Arg!T arg): Ensures that the argument is not null.
isNotWhitespace Arg!S isNotWhitespace(Arg!S arg): Ensures that a string does not contain only whitespace characters.

Arg struct Arg(T): Represents a single function parameter, including name and value, upon which all validation is performed.