Enum BreakingChange 

pub enum BreakingChange {
    Rename {
        from: String,
        to: String,
    },
    Retype {
        field: String,
        from: String,
        to: String,
    },
    Drop {
        field: String,
    },
    RequiredAdd {
        field: String,
    },
}

One reason why a candidate schema is not an additive successor of the previous version. Used inside SchemaError::BreakingChange.

Variants

Rename

A field present in the previous version disappeared, and a new field of the same declared type appeared in the candidate. Treated as a rename rather than two separate changes because the caller almost certainly meant to rename — the error message tells them which pair we paired up.

Fields

from: String

to: String

Retype

A field changed declared type.

Fields

field: String

from: String

to: String

Drop

A previously declared field is gone in the candidate.

Fields

field: String

RequiredAdd

A field that was previously optional became required, or a new field appeared in the candidate’s required list (existing rows wouldn’t carry it).

Fields

field: String

Implementations

impl BreakingChange

pub fn describe(&self) -> String

Short, machine-parseable description used in error bodies.

Trait Implementations

impl Clone for BreakingChange

fn clone(&self) -> BreakingChange

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BreakingChange

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

Formats the value using the given formatter.

impl PartialEq for BreakingChange

fn eq(&self, other: &BreakingChange) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for BreakingChange