/**
 * Thrown by the exact-distribution path to *deliberately* decline a program it
 * cannot represent exactly (e.g. a construct outside the symbolic engine's
 * scope, a die too large to enumerate, or a chain too heavy-tailed to compute
 * to ε). Distinct from an unexpected error: a `UnsupportedExactAnalysis` is a
 * sanctioned signal to fall back to Monte Carlo and is never reported as a
 * fallback "reason", even under `AnalyzeOptions.strictExact`. Most out-of-scope
 * cases instead return `null` without throwing; this exists for the paths where
 * throwing is the natural control flow (deep inside the per-die distribution
 * builders, which return a non-nullable distribution).
 *
 * Lives in its own dependency-free module so the low-level distribution engine
 * (`dice-stats`, `dice-mechanics`) can throw it without importing the symbolic
 * evaluator that consumes it, avoiding an import cycle.
 */
export declare class UnsupportedExactAnalysis extends Error {
    constructor(reason: string);
}