Trait FromIndexKey 

pub trait FromIndexKey: Sized {
    // Required method
    fn from_index_key(k: &IndexKey) -> Self;
}

Typed projection of an IndexKey. Implementations panic when the key’s shape does not match the target type, the same contract as crate::indexed::IndexedVar indexing on a missing key.

Used by crate::model::Model::add_constraints_over (and similar rule helpers) to give the closure typed indices directly:

m.add_constraints_over("supply", &(&plants * &markets), |(p, m): (String, String)| {
    // p, m are native String, no manual unpack
    ...
});

Required Methods

fn from_index_key(k: &IndexKey) -> Self

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl FromIndexKey for i32

fn from_index_key(k: &IndexKey) -> Self

impl FromIndexKey for i64

fn from_index_key(k: &IndexKey) -> Self

impl FromIndexKey for usize

fn from_index_key(k: &IndexKey) -> Self

impl FromIndexKey for String

fn from_index_key(k: &IndexKey) -> Self

impl<A, B> FromIndexKey for (A, B)

where A: FromIndexKey, B: FromIndexKey,

fn from_index_key(k: &IndexKey) -> Self

impl<A, B, C> FromIndexKey for (A, B, C)

where A: FromIndexKey, B: FromIndexKey, C: FromIndexKey,

fn from_index_key(k: &IndexKey) -> Self

impl<A, B, C, D> FromIndexKey for (A, B, C, D)

where A: FromIndexKey, B: FromIndexKey, C: FromIndexKey, D: FromIndexKey,

fn from_index_key(k: &IndexKey) -> Self

Implementors

impl FromIndexKey for IndexKey