Struct SourceMetadata 

pub struct SourceMetadata { /* private fields */ }

What is known about one source.

Implementations

impl SourceMetadata

pub fn new() -> Self

Metadata with no field read.

pub fn with<I, V>(self, field: SourceField, values: I) -> Self

where I: IntoIterator<Item = V>, V: Into<String>,

States field as read completely, holding values.

Values are kept sorted and distinct; blank ones state nothing and are dropped, so a field of only blank values is read and empty. Stating a field again replaces it.

pub fn values(&self, field: SourceField) -> Option<&[String]>

The values of field, sorted and distinct; None when it was never read.

pub fn fields(&self) -> impl Iterator<Item = (SourceField, &[String])>

Every read field with its values.

pub fn merged(self, other: Self) -> Result<Self, SourceField>

Both statements together.

Errors

The first field both state with different values: two readers of one source disagree, and neither is taken.

Trait Implementations

impl Clone for SourceMetadata

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SourceMetadata

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

Formats the value using the given formatter.

impl Default for SourceMetadata

fn default() -> Self

Returns the “default value” for a type.

impl Eq for SourceMetadata

impl PartialEq for SourceMetadata

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for SourceMetadata