/
typescript.js
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/
typescript.js
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"use strict";
const t = require("../../");
const stringifyValidator = require("../utils/stringifyValidator");
const toFunctionName = require("../utils/toFunctionName");
let code = `// NOTE: This file is autogenerated. Do not modify.
// See packages/babel-types/scripts/generators/typescript.js for script used.
interface BaseComment {
value: string;
start: number;
end: number;
loc: SourceLocation;
type: "CommentBlock" | "CommentLine";
}
export interface CommentBlock extends BaseComment {
type: "CommentBlock";
}
export interface CommentLine extends BaseComment {
type: "CommentLine";
}
export type Comment = CommentBlock | CommentLine;
export interface SourceLocation {
start: {
line: number;
column: number;
};
end: {
line: number;
column: number;
};
}
interface BaseNode {
leadingComments: ReadonlyArray<Comment> | null;
innerComments: ReadonlyArray<Comment> | null;
trailingComments: ReadonlyArray<Comment> | null;
start: number | null;
end: number | null;
loc: SourceLocation | null;
type: Node["type"];
}
export type Node = ${t.TYPES.sort().join(" | ")};\n\n`;
//
const lines = [];
for (const type in t.NODE_FIELDS) {
const fields = t.NODE_FIELDS[type];
const fieldNames = sortFieldNames(Object.keys(t.NODE_FIELDS[type]), type);
const struct = ['type: "' + type + '";'];
const args = [];
fieldNames.forEach(fieldName => {
const field = fields[fieldName];
let typeAnnotation = stringifyValidator(field.validate, "");
if (isNullable(field) && !hasDefault(field)) {
typeAnnotation += " | null";
}
if (areAllRemainingFieldsNullable(fieldName, fieldNames, fields)) {
args.push(
`${t.toBindingIdentifierName(fieldName)}${
isNullable(field) ? "?:" : ":"
} ${typeAnnotation}`
);
} else {
args.push(
`${t.toBindingIdentifierName(fieldName)}: ${typeAnnotation}${
isNullable(field) ? " | undefined" : ""
}`
);
}
const alphaNumeric = /^\w+$/;
if (t.isValidIdentifier(fieldName) || alphaNumeric.test(fieldName)) {
struct.push(`${fieldName}: ${typeAnnotation};`);
} else {
struct.push(`"${fieldName}": ${typeAnnotation};`);
}
});
code += `export interface ${type} extends BaseNode {
${struct.join("\n ").trim()}
}\n\n`;
// super and import are reserved words in JavaScript
if (type !== "Super" && type !== "Import") {
lines.push(
`export function ${toFunctionName(type)}(${args.join(", ")}): ${type};`
);
} else {
const functionName = toFunctionName(type);
lines.push(
`declare function _${functionName}(${args.join(", ")}): ${type};`,
`export { _${functionName} as ${functionName}}`
);
}
}
for (let i = 0; i < t.TYPES.length; i++) {
let decl = `export function is${
t.TYPES[i]
}(node: object | null | undefined, opts?: object | null): `;
if (t.NODE_FIELDS[t.TYPES[i]]) {
decl += `node is ${t.TYPES[i]};`;
} else if (t.FLIPPED_ALIAS_KEYS[t.TYPES[i]]) {
decl += `node is ${t.TYPES[i]};`;
} else {
decl += `boolean;`;
}
lines.push(decl);
}
lines.push(
`export function validate(n: Node, key: string, value: any): void;`,
`export function clone<T extends Node>(n: T): T;`,
`export function cloneDeep<T extends Node>(n: T): T;`,
`export function removeProperties(
n: Node,
opts?: { preserveComments: boolean } | null
): void;`,
`export function removePropertiesDeep<T extends Node>(
n: T,
opts?: { preserveComments: boolean } | null
): T;`,
`export type TraversalAncestors = ReadonlyArray<{
node: Node,
key: string,
index?: number,
}>;
export type TraversalHandler<T> = (node: Node, parent: TraversalAncestors, type: T) => void;
export type TraversalHandlers<T> = {
enter?: TraversalHandler<T>,
exit?: TraversalHandler<T>,
};`.replace(/(^|\n) {2}/g, "$1"),
// eslint-disable-next-line
`export function traverse<T>(n: Node, h: TraversalHandler<T> | TraversalHandlers<T>, state?: T): void;`,
`export function is(type: string, n: Node, opts: object): boolean;`,
`export function isBinding(node: Node, parent: Node, grandparent?: Node): boolean`,
`export function isBlockScoped(node: Node): boolean`,
`export function isImmutable(node: Node): boolean`,
`export function isLet(node: Node): boolean`,
`export function isNode(node: ?object): boolean`,
`export function isNodesEquivalent(a: any, b: any): boolean`,
`export function isPlaceholderType(placeholderType: ?string, targetType: string): boolean`,
`export function isReferenced(node: Node, parent: Node, grandparent?: Node): boolean`,
`export function isScope(node: Node, parent: Node): boolean`,
`export function isSpecifierDefault(specifier: ModuleSpecifier): boolean`,
`export function isType(nodetype: ?string, targetType: string): boolean`,
`export function isValidES3Identifier(name: string): boolean`,
`export function isValidES3Identifier(name: string): boolean`,
`export function isValidIdentifier(name: string): boolean`,
`export function isVar(node: Node): boolean`
);
for (const type in t.DEPRECATED_KEYS) {
code += `/**
* @deprecated Use \`${t.DEPRECATED_KEYS[type]}\`
*/
export type ${type} = ${t.DEPRECATED_KEYS[type]};\n
`;
}
for (const type in t.FLIPPED_ALIAS_KEYS) {
const types = t.FLIPPED_ALIAS_KEYS[type];
code += `export type ${type} = ${types
.map(type => `${type}`)
.join(" | ")};\n`;
}
code += "\n";
code += "export interface Aliases {\n";
for (const type in t.FLIPPED_ALIAS_KEYS) {
code += ` ${type}: ${type};\n`;
}
code += "}\n\n";
code += lines.join("\n") + "\n";
//
process.stdout.write(code);
//
function areAllRemainingFieldsNullable(fieldName, fieldNames, fields) {
const index = fieldNames.indexOf(fieldName);
return fieldNames.slice(index).every(_ => isNullable(fields[_]));
}
function hasDefault(field) {
return field.default != null;
}
function isNullable(field) {
return field.optional || hasDefault(field);
}
function sortFieldNames(fields, type) {
return fields.sort((fieldA, fieldB) => {
const indexA = t.BUILDER_KEYS[type].indexOf(fieldA);
const indexB = t.BUILDER_KEYS[type].indexOf(fieldB);
if (indexA === indexB) return fieldA < fieldB ? -1 : 1;
if (indexA === -1) return 1;
if (indexB === -1) return -1;
return indexA - indexB;
});
}