3e4889d649
* Remove error for static private accessors * Private static accessors strict * Add loose mode support * Move `value` decl for early return * Reuse getter/setter template * Reuse getter/setter templates * Use `buildUndefinedNode` in accessor templates * Extract `isAccessor` variable
88 lines
2.9 KiB
JavaScript
88 lines
2.9 KiB
JavaScript
import { hasOwnDecorators } from "./decorators";
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export const FEATURES = Object.freeze({
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//classes: 1 << 0,
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fields: 1 << 1,
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privateMethods: 1 << 2,
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decorators: 1 << 3,
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});
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// We can't use a symbol because this needs to always be the same, even if
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// this package isn't deduped by npm. e.g.
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// - node_modules/
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// - @babel/plugin-class-features
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// - @babel/plugin-proposal-decorators
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// - node_modules
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// - @babel-plugin-class-features
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const featuresKey = "@babel/plugin-class-features/featuresKey";
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const looseKey = "@babel/plugin-class-features/looseKey";
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export function enableFeature(file, feature, loose) {
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// We can't blindly enable the feature because, if it was already set,
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// "loose" can't be changed, so that
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// @babel/plugin-class-properties { loose: true }
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// @babel/plugin-class-properties { loose: false }
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// is transformed in loose mode.
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// We only enabled the feature if it was previously disabled.
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if (!hasFeature(file, feature)) {
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file.set(featuresKey, file.get(featuresKey) | feature);
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if (loose) file.set(looseKey, file.get(looseKey) | feature);
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}
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}
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function hasFeature(file, feature) {
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return !!(file.get(featuresKey) & feature);
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}
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export function isLoose(file, feature) {
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return !!(file.get(looseKey) & feature);
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}
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export function verifyUsedFeatures(path, file) {
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if (hasOwnDecorators(path.node)) {
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if (!hasFeature(file, FEATURES.decorators)) {
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throw path.buildCodeFrameError(
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"Decorators are not enabled." +
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"\nIf you are using " +
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'["@babel/plugin-proposal-decorators", { "legacy": true }], ' +
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'make sure it comes *before* "@babel/plugin-proposal-class-properties" ' +
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"and enable loose mode, like so:\n" +
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'\t["@babel/plugin-proposal-decorators", { "legacy": true }]\n' +
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'\t["@babel/plugin-proposal-class-properties", { "loose": true }]',
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);
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}
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if (path.isPrivate()) {
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throw path.buildCodeFrameError(
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`Private ${
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path.isClassMethod() ? "methods" : "fields"
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} in decorated classes are not supported yet.`,
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);
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}
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}
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// NOTE: We can't use path.isPrivateMethod() because it isn't supported in <7.2.0
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if (path.isPrivate() && path.isMethod()) {
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if (!hasFeature(file, FEATURES.privateMethods)) {
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throw path.buildCodeFrameError("Class private methods are not enabled.");
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}
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}
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if (
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hasFeature(file, FEATURES.privateMethods) &&
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hasFeature(file, FEATURES.fields) &&
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isLoose(file, FEATURES.privateMethods) !== isLoose(file, FEATURES.fields)
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) {
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throw path.buildCodeFrameError(
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"'loose' mode configuration must be the same for both @babel/plugin-proposal-class-properties " +
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"and @babel/plugin-proposal-private-methods",
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);
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}
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if (path.isProperty()) {
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if (!hasFeature(file, FEATURES.fields)) {
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throw path.buildCodeFrameError("Class fields are not enabled.");
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}
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}
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}
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