/**
 * Building an `if=` sequence in RAM (Engine 1).
 *
 * Split out of build.ts, which sits at the file-size limit, when the branches
 * learned to compute only the rows they win — the one rule this construct has
 * that nothing beside it in build.ts needs.
 */
import type { SequenceBuildContext } from './context.js';
import type { CondBranch, Sequence, SequenceRegistry, SequenceSpec } from './types.js';
/**
 * Conditional sequence (in-memory / Engine 1): materialize each branch's gen
 * over all rows, then per row pick the FIRST branch whose `if` is truthy (or a
 * fallback branch with no `if`). None match → the row is empty. Conditions are
 * evaluated against the registry, which already holds earlier-declared
 * sequences (parent-before-child order).
 */
export declare function materializeConditional(spec: SequenceSpec, branches: readonly CondBranch[], registry: SequenceRegistry, count: number, prng: () => number, locale: string, now: number, ctx: SequenceBuildContext): {
    sequence: Sequence;
    flags: readonly {
        name: string;
        sequence: Sequence;
    }[];
};
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