import { AccessorChain } from "../data/createAccessorModelProxy";
import { Selector } from "../data/Selector";
/** Returns a selector that converts the value to boolean using !! */
export declare function truthy<V>(arg: AccessorChain<V>): Selector<boolean>;
/** Returns a selector that checks if the value is falsy using ! */
export declare function falsy<V>(arg: AccessorChain<V>): Selector<boolean>;
/** Returns a selector that checks if the value is strictly true (=== true) */
export declare function isTrue(arg: AccessorChain<any>): Selector<boolean>;
/** Returns a selector that checks if the value is strictly false (=== false) */
export declare function isFalse(arg: AccessorChain<any>): Selector<boolean>;
/** Returns a selector that checks if the value is not null or undefined (x != null) */
export declare function hasValue<V>(arg: AccessorChain<V>): Selector<boolean>;
/** Returns a selector that checks if a string or array is empty (null, undefined, or length === 0) */
export declare function isEmpty(arg: AccessorChain<string | any[] | null | undefined>): Selector<boolean>;
/** Returns a selector that checks if a string or array is non-empty (not null/undefined and length > 0) */
export declare function isNonEmpty(arg: AccessorChain<string | any[] | null | undefined>): Selector<boolean>;
/** Returns a selector that checks if the value is less than the given value */
export declare function lessThan<V>(arg: AccessorChain<V>, value: V): Selector<boolean>;
/** Returns a selector that checks if the value is less than or equal to the given value */
export declare function lessThanOrEqual<V>(arg: AccessorChain<V>, value: V): Selector<boolean>;
/** Returns a selector that checks if the value is greater than the given value */
export declare function greaterThan<V>(arg: AccessorChain<V>, value: V): Selector<boolean>;
/** Returns a selector that checks if the value is greater than or equal to the given value */
export declare function greaterThanOrEqual<V>(arg: AccessorChain<V>, value: V): Selector<boolean>;
/** Returns a selector that checks if the value equals the given value using == */
export declare function equal<V>(arg: AccessorChain<V>, value: V): Selector<boolean>;
/** Returns a selector that checks if the value does not equal the given value using != */
export declare function notEqual<V>(arg: AccessorChain<V>, value: V): Selector<boolean>;
/** Returns a selector that checks if the value strictly equals the given value using === */
export declare function strictEqual<V>(arg: AccessorChain<V>, value: V): Selector<boolean>;
/** Returns a selector that checks if the value strictly does not equal the given value using !== */
export declare function strictNotEqual<V>(arg: AccessorChain<V>, value: V): Selector<boolean>;
/** Returns a selector that formats the value using the specified format string.
 * Format strings use semicolon-separated syntax: "formatType;param1;param2"
 * @param arg - The accessor chain to the value
 * @param fmt - The format string
 * @param nullText - Optional text to display for null/undefined values
 * @example
 * format(m.price, "n;2") // formats as number with 2 decimal places
 * format(m.date, "d") // formats as date
 * format(m.value, "p;0;2") // formats as percentage with 0-2 decimal places
 * format(m.value, "n;2", "N/A") // shows "N/A" for null values
 */
export declare function format<V>(arg: AccessorChain<V>, fmt: string, nullText?: string): Selector<string>;
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