custom_formatter

Provides a generalized version of format_args! (and format!) that allows you to format into arbitrary types. See the documentation for more.

lib.rs:

A generalized version of format_args, that allows you to format into arbitrary types, instead of just strings.

For examples, see the examples subdirectory. color.rs provides a simple motivation.

To get started, implement CustomFormatter. For types with a single canonical way to format, implement CustomFormatter directly on the type with Output = Self. For types with multiple different formatting strategies (such as Debug and Display for strings), implement CustomFormatter on a marker type instead.

Then, implement Format<F> on types that can be formatted into your custom formatter.

Finally, you can use the provided macro, custom_format!, in a similar manner to format, to create instances of the type.