Module eval 

Expression evaluation engine.

Evaluates DOL Expression nodes against JSON-like field maps. Supports arithmetic, comparison, boolean logic, function calls (upper, lower, date_format, coalesce, etc.), and CASE/IF expressions.

Example

let fields = BTreeMap::from([("cpu", json!(87.5))]);
let expr = Expression::Comparison { left: ..., operator: Gt, right: ... };
assert!(eval::evaluate_expression(&fields, &expr)?);

Enums

EvalError

Functions

compare_json_values

eval_bool

Evaluate an expression as a boolean (for where, if contexts).

eval_expr

Evaluate any expression to a JSON value.

evaluate_expression

Legacy wrapper — kept for backward compatibility.

evaluate_set_value

json_as_f64

json_contains

json_contains_val

json_eq

json_value_eq

render_json_cell

value_as_f64

value_as_text

value_to_json