Enum ResultChanges 

pub enum ResultChanges<OkC: ChangeReport, ErrC: ChangeReport> {
    Unchanged,
    BecameOk,
    BecameErr,
    OkInner(OkC),
    ErrInner(ErrC),
}

Change report for Result<T, E> fields.

Tracks whether the result variant changed and preserves inner change information.

Variants

Unchanged

No change occurred.

BecameOk

Variant changed from Err to Ok.

BecameErr

Variant changed from Ok to Err.

OkInner(OkC)

Both were Ok, contains the inner Ok changes.

ErrInner(ErrC)

Both were Err, contains the inner Err changes.

Implementations

impl<OkC: ChangeReport, ErrC: ChangeReport> ResultChanges<OkC, ErrC>

pub fn became_ok(&self) -> bool

Returns true if the result became Ok (was Err before).

pub fn became_err(&self) -> bool

Returns true if the result became Err (was Ok before).

pub fn ok_inner(&self) -> Option<&OkC>

Returns the inner Ok changes if both values were Ok.

pub fn err_inner(&self) -> Option<&ErrC>

Returns the inner Err changes if both values were Err.

Trait Implementations

impl<OkC: ChangeReport, ErrC: ChangeReport> ChangeReport for ResultChanges<OkC, ErrC>

fn any(&self) -> bool

Returns true if any field in this report (or nested reports) changed.

fn paths(&self) -> Vec<Vec<Cow<'static, str>>>

Collects all changed field paths as strings.

fn leaf_paths(&self) -> Vec<Vec<Cow<'static, str>>>

Collects only the leaf (deepest) changed field paths.

fn none(&self) -> bool

Returns true if no fields changed.

impl<OkC: Clone + ChangeReport, ErrC: Clone + ChangeReport> Clone for ResultChanges<OkC, ErrC>

fn clone(&self) -> ResultChanges<OkC, ErrC>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<OkC: Debug + ChangeReport, ErrC: Debug + ChangeReport> Debug for ResultChanges<OkC, ErrC>

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

Formats the value using the given formatter.

impl<OkC: ChangeReport, ErrC: ChangeReport> Default for ResultChanges<OkC, ErrC>

fn default() -> ResultChanges<OkC, ErrC>

Returns the “default value” for a type.