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Use TS3.7 when possible for @babel/type dts (#12317)

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This commit is contained in:
Nicolò Ribaudo
2020-11-09 21:33:24 +01:00
parent 07607fa7c7
commit a9bc9becc5
3 changed files with 19 additions and 3 deletions
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14
packages/babel-types/scripts/generators/typescript.js
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@@ -4,6 +4,15 @@ const t = require("../../");
const stringifyValidator = require("../utils/stringifyValidator");
const toFunctionName = require("../utils/toFunctionName");
// For backward compat, we cannot use TS 3.7 syntax in published packages
const ts3_7 = process.argv.includes("--ts3.7")
? (code, ...substitutions) => template(code, substitutions)
: () => "";
const template = (strings, substitutions) =>
strings
.slice(1)
.reduce((res, str, i) => res + substitutions[i] + str, strings[0]);
let code = `// NOTE: This file is autogenerated. Do not modify.
// See packages/babel-types/scripts/generators/typescript.js for script used.
@@ -130,7 +139,7 @@ for (const typeName of t.TYPES) {
`export function is${typeName}(node: object | null | undefined, opts?: object | null): ${result};`,
// TypeScript 3.7: https://github.com/microsoft/TypeScript/pull/32695 will allow assert declarations
// eslint-disable-next-line max-len
`// export function assert${typeName}(node: object | null | undefined, opts?: object | null): asserts ${
ts3_7`export function assert${typeName}(node: object | null | undefined, opts?: object | null): asserts ${
result === "boolean" ? "node" : result
};`
);
@@ -138,8 +147,7 @@ for (const typeName of t.TYPES) {
lines.push(
// assert/
// Commented out as this declaration requires TypeScript 3.7 (what do?)
`// export function assertNode(obj: any): asserts obj is Node`,
ts3_7`export function assertNode(obj: any): asserts obj is Node`,
// builders/
// eslint-disable-next-line max-len