/
features.ts
29 lines (25 loc) 路 967 Bytes
/
features.ts
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export const FEATURES = Object.freeze({
unicodeFlag: 1 << 0,
dotAllFlag: 1 << 1,
unicodePropertyEscape: 1 << 2,
namedCaptureGroups: 1 << 3,
unicodeSetsFlag_syntax: 1 << 4,
unicodeSetsFlag: 1 << 5,
duplicateNamedCaptureGroups: 1 << 6,
});
// We can't use a symbol because this needs to always be the same, even if
// this package isn't deduped by npm. e.g.
// - node_modules/
// - @babel/plugin-regexp-features
// - @babel/plugin-proposal-unicode-property-regex
// - node_modules
// - @babel-plugin-regexp-features
export const featuresKey = "@babel/plugin-regexp-features/featuresKey";
export const runtimeKey = "@babel/plugin-regexp-features/runtimeKey";
type FeatureType = typeof FEATURES[keyof typeof FEATURES];
export function enableFeature(features: number, feature: FeatureType): number {
return features | feature;
}
export function hasFeature(features: number, feature: FeatureType) {
return !!(features & feature);
}