import type { Program, Value, Expression } from './program';
export interface Parameter {
    name: string;
    default?: Value;
    /**
     * Dice-anchored expression default (e.g. `default: d6`, `default: 4d6 drop
     * 1`, `default: 2d6 + 1`). Set when the parameter's default is anything
     * other than a literal value.
     */
    defaultExpression?: Expression;
    label?: string;
    description?: string;
    min?: number;
    max?: number;
    /** Increment of the admissible value grid `{min + k·step}`. */
    step?: number;
    enum?: Value[];
    /** Display labels for `enum`, index-aligned with it; present only for the
     * object form of the declaration. */
    enumLabels?: string[];
}
/**
 * Whether `value` lies on the admissible grid `{ min + k·step }`. Uses a small
 * absolute tolerance so float-representable steps (e.g. `step: 0.1`, where
 * `(0.3 - 0) / 0.1` is `2.9999…`) are not spuriously rejected. Shared by the
 * parser (default/grid validation) and the evaluator (override validation) so
 * the two cannot disagree on what "on the grid" means.
 */
export declare function isOnStepGrid(value: number, min: number, step: number): boolean;
export declare const ProgramParameters: {
    list(program: Program): Parameter[];
};