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- type _If<Test, Then, Else> = Test extends true ? Then : Else;
- export type Features = {
- lookbehind?: boolean;
- namedGroups?: boolean;
- unicodePropertyEscape?: boolean;
- unicodeSet?: boolean;
- };
- export type AstNodeType =
- | "alternative"
- | "anchor"
- | "characterClass"
- | "characterClassEscape"
- | "characterClassRange"
- | "disjunction"
- | "dot"
- | "group"
- | "quantifier"
- | "reference"
- | "unicodePropertyEscape"
- | "value";
- export type Base<T extends AstNodeType> = {
- range: [number, number];
- raw: string;
- type: T;
- };
- export type AstNode<F extends Features = {}> =
- | Alternative<F>
- | Anchor
- | CharacterClass<F>
- | CharacterClassEscape
- | CharacterClassRange
- | Disjunction<F>
- | Dot
- | Group<F>
- | Quantifier<F>
- | Reference<F>
- | _If<F["unicodePropertyEscape"], UnicodePropertyEscape, never>
- | Value;
- export type RootNode<F extends Features = {}> = Exclude<
- AstNode<F>,
- CharacterClassRange
- >;
- export type Anchor = Base<"anchor"> & {
- kind: "boundary" | "end" | "not-boundary" | "start";
- };
- export type CharacterClassEscape = Base<"characterClassEscape"> & {
- value: string;
- };
- export type Value = Base<"value"> & {
- codePoint: number;
- kind:
- | "controlLetter"
- | "hexadecimalEscape"
- | "identifier"
- | "null"
- | "octal"
- | "singleEscape"
- | "symbol"
- | "unicodeCodePointEscape"
- | "unicodeEscape";
- };
- export type Identifier = Base<"value"> & {
- value: string;
- };
- export type Alternative<F extends Features = {}> = Base<"alternative"> & {
- body: RootNode<F>[];
- };
- export type CharacterClassRange = Base<"characterClassRange"> & {
- max: Value;
- min: Value;
- };
- export type UnicodePropertyEscape = Base<"unicodePropertyEscape"> & {
- negative: boolean;
- value: string;
- };
- export type CharacterClassBody =
- | CharacterClassEscape
- | CharacterClassRange
- | UnicodePropertyEscape
- | Value;
- export type CharacterClass<F extends Features = {}> = Base<"characterClass"> & {
- body: CharacterClassBody[];
- negative: boolean;
- kind: "union" | _If<F["unicodeSet"], "intersection" | "subtraction", never>;
- };
- export type NonCapturingGroup<F extends Features = {}> = Base<"group"> & {
- behavior:
- | "ignore"
- | "lookahead"
- | "lookbehind"
- | "negativeLookahead"
- | "negativeLookbehind";
- body: RootNode<F>[];
- };
- export type CapturingGroup<F extends Features = {}> = Base<"group"> & {
- behavior: "normal";
- body: RootNode<F>[];
- } & _If<
- F["namedGroups"],
- {
- name?: Identifier;
- },
- {
- name: undefined;
- }
- >;
- export type Group<F extends Features = {}> =
- | CapturingGroup<F>
- | NonCapturingGroup<F>;
- export type Quantifier<F extends Features = {}> = Base<"quantifier"> & {
- body: [RootNode<F>];
- greedy: boolean;
- max?: number;
- min: number;
- symbol?: '?' | '*' | '+';
- };
- export type Disjunction<F extends Features = {}> = Base<"disjunction"> & {
- body: [RootNode<F>, RootNode<F>, ...RootNode<F>[]];
- };
- export type Dot = Base<"dot">;
- export type NamedReference = Base<"reference"> & {
- matchIndex: undefined;
- name: Identifier;
- };
- export type IndexReference = Base<"reference"> & {
- matchIndex: number;
- name: undefined;
- };
- export type Reference<F extends Features = {}> = _If<
- F["namedGroups"],
- NamedReference,
- IndexReference
- >;
- export function parse<F extends Features = {}>(
- str: string,
- flags: string,
- features?: F
- ): RootNode<F>;
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