Module argument 

Defines traits and types to help make arbitrary values formattable at runtime.

Structs

ArgumentFormatter

Holds a FormatArgument and implements all the std::fmt formatting traits.

NoNamedArguments

A NamedArguments implementation that always returns None.

NoPositionalArguments

A ’PositionalArgumentsimplementation that always returnsNone`.

Traits

ArgumentSource

A source of values to use when parsing the formatting string.

FormatArgument

A type that indicates whether its value supports a specific format, and provides formatting functions that correspond to different format types.

NamedArguments

A type that associates an argument with a name.

PositionalArguments

A type that provides a list of arguments, randomly accessible by their position.