import type { BuiltInEvalHandlerArgs } from '../../environments/built-in';
import { type Value } from '../values/r-value';
/** `strings` marks the operators that also fold for two strings; the ordering ones do not, as R compares them by locale collation */
export declare const ComparisonOps: {
    readonly '==': {
        readonly apply: (a: number | string, b: number | string) => boolean;
        readonly strings: true;
    };
    readonly '!=': {
        readonly apply: (a: number | string, b: number | string) => boolean;
        readonly strings: true;
    };
    readonly '<': {
        readonly apply: (a: number | string, b: number | string) => boolean;
        readonly strings: false;
    };
    readonly '>': {
        readonly apply: (a: number | string, b: number | string) => boolean;
        readonly strings: false;
    };
    readonly '<=': {
        readonly apply: (a: number | string, b: number | string) => boolean;
        readonly strings: false;
    };
    readonly '>=': {
        readonly apply: (a: number | string, b: number | string) => boolean;
        readonly strings: false;
    };
};
/**
 * Resolves a comparison operator on two scalars of the same kind to a {@link Value} logical, with a logical counting as
 * its `0`/`1`. Operands of different kinds stay Top, as R would coerce them to a common type first.
 */
export declare function resolveAsComparison(args: BuiltInEvalHandlerArgs): Value;
/** `decidedBy` is the lhs that fixes the result of the short-circuiting `&&`/`||` on its own; `&`/`|` vectorize, so they need both sides */
export declare const LogicalOps: {
    readonly '&&': {
        readonly apply: (a: boolean, b: boolean) => boolean;
        readonly decidedBy: false;
    };
    readonly '||': {
        readonly apply: (a: boolean, b: boolean) => boolean;
        readonly decidedBy: true;
    };
    readonly '&': {
        readonly apply: (a: boolean, b: boolean) => boolean;
        readonly decidedBy: undefined;
    };
    readonly '|': {
        readonly apply: (a: boolean, b: boolean) => boolean;
        readonly decidedBy: undefined;
    };
};
/**
 * Resolves the unary `!` and the binary {@link LogicalOps} on scalar logicals to a {@link Value} logical.
 * `NA` and any operand that does not fold keep the result Top, unless the lhs alone already decides it.
 */
export declare function resolveAsLogical(args: BuiltInEvalHandlerArgs): Value;
/** Resolves `(x)` to the {@link Value} of `x`, so that a parenthesized sub-expression folds like the expression itself. */
export declare function resolveAsGroup(args: BuiltInEvalHandlerArgs): Value;