Namespace RuleWright.Extensions.Functions

Classes

BuiltInFunctions

A small, curated catalog of ready-made IRuleFunction predicates for the custom operator — the things the closed built-in operator vocabulary deliberately does not cover: case-insensitive comparison, emptiness/format checks, number parity and divisibility, and date relativity. Every predicate is total: given a value of an unexpected shape it returns false rather than throwing.

Reference one by Name in a rule leaf, e.g. { "operator": "custom", "name": "IsEven", "field": "Order.ItemCount" }, after registering the set with RegisterBuiltInFunctions(RuleWrightBuilder, Func<DateTime>?).

IsNullOrEmpty	field is null or an empty string
IsNullOrWhiteSpace	field is null, empty, or whitespace
EqualsIgnoreCase	field equals the value ignoring case (ordinal)
IsEmail	field looks like an email address
IsEven / IsOdd	field is an even / odd integer
IsPositive / IsNegative	field is a number > 0 / < 0
DivisibleBy	field is an integer divisible by the value
IsBetweenInclusive	field is within the [min, max] value array
IsWeekend / IsWeekday	field date falls on a weekend / weekday
IsInPast / IsInFuture	field date is before / after now

NamedRuleFunction

An IRuleFunction backed by a delegate — a name plus a predicate over the resolved field value and the leaf's constant value. Immutable and therefore thread-safe, as IRuleFunction requires. Use it to define ad-hoc custom functions inline, or as the building block for a reusable catalog (see BuiltInFunctions).

RuleWrightFunctionExtensions

Convenience registration and discovery helpers over RegisterFunction(IRuleFunction): register many functions at once, register the whole built-in catalog, or scan an assembly for function implementations.