Enum Shape 

pub enum Shape {
    Given(String),
    Resolved(Option<String>),
    Ordered(Vec<String>),
}

The three shapes a build setting comes in.

They are distinguished because they encode differently, and they encode differently because they mean different things: a value nobody resolved is not an empty value, and a sequence of one is not a scalar.

Variants

Given(String)

A value every build has.

Resolved(Option<String>)

A value only something that looked it up can supply.

Ordered(Vec<String>)

A sequence, in the order it was given.

Implementations

impl Shape

pub fn values(&self) -> Vec<&str>

The values worth recording, in order.

An unresolved setting yields nothing: what was never looked up is absent from the record rather than present and empty.

Trait Implementations

impl Clone for Shape

fn clone(&self) -> Shape

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Shape

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

Formats the value using the given formatter.

impl Eq for Shape

impl PartialEq for Shape

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Shape