Enum Needs 

pub enum Needs {
    Free,
    Support(Vec<Rule>),
    Unjudged(String),
}

What one block state needs beside it.

Variants

Free

It survives in air: nothing.

Support(Vec<Rule>)

Any one of these neighbours keeps it.

Unjudged(String)

The single-neighbour reading cannot be its whole rule; the reason, as the table states it. Nothing is judged.

Implementations

impl Needs

pub fn kept<'a>(&self, neighbour: impl Fn(Face) -> &'a str) -> Option<bool>

Whether the block survives with neighbour(cell) beside it, by the measured rule: Some(true) for a free block or one a rule holds, Some(false) when no rule holds, None when the rule is unjudged.

Trait Implementations

impl Clone for Needs

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 Needs

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

Formats the value using the given formatter.

impl Eq for Needs

impl PartialEq for Needs

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Needs