import type { Span } from "./source.ts";
export type TokenKind = "identifier" | "number" | "string" | "fstring" | "extensionToken" | "unitNumber" | "const" | "let" | "def" | "async" | "detach" | "await" | "export" | "import" | "js" | "unsafe" | "extern" | "module" | "enum" | "abstract" | "class" | "extends" | "override" | "private" | "static" | "super" | "return" | "throw" | "assert" | "if" | "else" | "for" | "in" | "while" | "break" | "continue" | "try" | "catch" | "finally" | "pass" | "is" | "true" | "false" | "null" | "and" | "or" | "not" | "newline" | "indent" | "dedent" | "leftParen" | "rightParen" | "leftBracket" | "rightBracket" | "leftBrace" | "rightBrace" | "colon" | "comma"
/** `@` qualifies the next name into the compiler-owned namespace of the current syntax context. */  | "at" | "dot" | "ellipsis" | "question"
/**
 * A bare `!`. The character alone does not say which operator it is: after
 * an operand it is the required-value unwrap (`tags!`), and before one it is
 * the JavaScript negation VelarScript guides to `not`. Position decides, so
 * the lexer hands both readings to the parser under one kind.
 */
 | "bang" | "optionalDot" | "nullish" | "arrow" | "fatArrow" | "pipe" | "amp" | "caret" | "tilde" | "leftShift" | "rightShift" | "unsignedRightShift" | "assign" | "plusAssign" | "minusAssign" | "starAssign" | "slashAssign" | "percentAssign" | "bitOrAssign" | "bitAndAssign" | "bitXorAssign" | "leftShiftAssign" | "rightShiftAssign" | "unsignedRightShiftAssign" | "equal" | "notEqual" | "less" | "lessEqual" | "greater" | "greaterEqual" | "plus" | "minus" | "star" | "starStar" | "slash" | "percent" | "eof";
export interface Token {
    readonly kind: TokenKind;
    readonly value: string;
    readonly span: Span;
    readonly payload?: unknown;
}
/**
 * A number token's payload, carried only when the author's own spelling differs
 * from the value the token holds — digit separators (`1_000_000_1`) and an
 * uppercase radix prefix (`0X20`) are the two differences the lexer makes.
 * D90 R6's representability report quotes the literal back at the author, and
 * quoting the normalized spelling would show them text that appears nowhere in
 * their source.
 */
export interface NumberTokenPayload {
    readonly written: string;
}
/**
 * Hard reserved words: spellings the lexer always turns into a keyword token,
 * so they can never name a binding. D30 item 16 softened the statement-head
 * words that JavaScript does not reserve — including `type`, `match`, `from`,
 * `as`, and `json` — into contextual keywords, which the lexer emits as ordinary
 * identifiers and the parser recognizes by declaration shape. `enum` stays
 * here because JavaScript reserves it, and generated JavaScript must be legal.
 */
export declare const keywordKinds: Readonly<Record<string, TokenKind>>;
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