Crate sim_value 

Ergonomic construction and access for kernel Expr data.

The kernel Expr enum is bare data with no ergonomic surface, so dozens of libs independently re-grew sym/number/field/set/expr_kind and a k/i path-addressing scheme. This crate is the one home for that. It depends only on sim-kernel and adds data ergonomics, not runtime behavior, so it does not touch the kernel boundary.

• build: constructors (sym, int, float, text, list, map, …);
• access: reading and immutable updates (field, set, remove, …);
• kind: the one Expr variant classifier (expr_kind);
• path: one value-addressing primitive (Path, get, set_at).

Example

use sim_value::access::{field, set};
use sim_value::build::{int, map, sym};

let value = map(vec![("a", int(1)), ("b", int(2))]);
assert_eq!(field(&value, "a"), Some(&int(1)));

let updated = set(&value, "a", int(9));
assert_eq!(field(&updated, "a"), Some(&int(9)));
assert_eq!(field(&updated, "b"), Some(&int(2))); // siblings preserved
let _ = sym("ok");

Modules

access

Reading and immutable updates for kernel Expr data.

build

Constructors for kernel Expr data.

kind

The one Expr variant classifier.

path

One value-addressing primitive over Expr.