Struct NegFormat

pub struct NegFormat<Fmt>(pub Fmt);

A wrapper over a formatter that negates it.

This type is a MatcherFormat that swaps the MatchFailure::Pos and MatchFailure::Neg values, so if you want to write a negated version of a matcher (e.g. be_ok vs be_err), you don’t have to write two formatters.

Tuple Fields

0: Fmt

Trait Implementations

impl<Fmt: Debug> Debug for NegFormat<Fmt>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<Fmt: Default> Default for NegFormat<Fmt>

fn default() -> NegFormat<Fmt>

Returns the “default value” for a type.

impl<Fmt, Pos, Neg> Format for NegFormat<Fmt>

where Fmt: Format<Value = MatchFailure<Pos, Neg>>,

type Value = MatchFailure<Neg, Pos>

The value to format.

fn fmt(&self, f: &mut Formatter, value: Self::Value) -> Result<()>

Format the value.