import type { InlineSpan } from './types.js';
/**
 * Walk an InlineSpan list and replace each occurrence of `placeholder` with a
 * dedicated span produced by `makeSpan` (carrying the ambient bold/italic),
 * consuming `items` in order. Plain-text spans are split around the
 * placeholder (the pieces keep their share of the span's links; the new
 * span takes none). Shared by ref and math injection. A small-caps span
 * keeps the flag on every piece, the placeholder's span included, and so
 * do the Chinese marks (see `annotationFields`); an orientation mark
 * (`:tcy`, `:upright`, `:sideways`) stays on the text pieces only.
 */
export declare function injectPlaceholderSpans<T>(spans: InlineSpan[], items: T[], placeholder: string, makeSpan: (item: T, bold: boolean, italic: boolean) => InlineSpan): InlineSpan[];
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