/**
 * Inline strong, emphasis, insert, delete, highlight.
 * - Inline strong text wrapped in one or more `*` asterisks.
 * - Inline emphasis text wrapped in one or more `_` underscores.
 * - Inline inserted text wrapped in one or more `+` pluses.
 * - Inline deleted text wrapped in one or more `-` minuses or `~` tildes.
 * - Inline highlighted text wrapped in one or more `=` equals or `:` colons.
 * - Whitespace cannot be the first or last character of the element (e.g. `* abc *` will not work).
 * - Closing chars must match opening characters.
 * - Cannot occur in the middle of a word (e.g. `this*that*this` will not work).
 * - Closing characters must exactly match opening characters.
 * - Different to Markdown: strong is always surrounded by `*asterisks*` and emphasis is always surrounded by `_underscores_` (strong isn't 'double emphasis').
 */
export declare const INLINE_RULE: import("../util/rule.js").MarkupRule;