Function printTypescript

src/language-js/print/typescript.js:49–222

(path, options, print, args)

import { printUnionType } from "./union-type.js";

function printTypescript(path, options, print, args) {
  const { node } = path;

  // TypeScript nodes always starts with `TS`
  if (!node.type.startsWith("TS")) {
    return;
  }

  if (isTsKeywordType(node)) {
    // TS keyword types stars with `TS`, ends with `Keyword`
    return node.type.slice(2, -7).toLowerCase();
  }

  switch (node.type) {
    case "TSThisType":
      return "this";
    case "TSTypeAssertion":
      return printTypeAssertion(path, options, print);

    case "TSDeclareFunction":
      return printFunction(path, options, print);
    case "TSExportAssignment":
      return ["export = ", print("expression"), printSemicolon(options)];
    case "TSModuleBlock":
      return printBlock(path, options, print);
    case "TSInterfaceBody":
    case "TSTypeLiteral":
      return printClassBody(path, options, print);
    case "TSTypeAliasDeclaration":
      return printTypeAlias(path, options, print);
    case "TSQualifiedName":
      return [print("left"), ".", print("right")];
    case "TSAbstractMethodDefinition":
    case "TSDeclareMethod":
      return printClassMethod(path, options, print);
    case "TSAbstractAccessorProperty":
    case "TSAbstractPropertyDefinition":
      return printClassProperty(path, options, print);
    case "TSInterfaceHeritage":
    case "TSClassImplements":
    case "TSInstantiationExpression":
      return [print("expression"), print("typeArguments")];
    case "TSTemplateLiteralType":
      return printTemplateLiteral(path, options, print);
    case "TSNamedTupleMember":
      return printNamedTupleMember(path, options, print);
    case "TSRestType":
      return printRestType(path, options, print);
    case "TSOptionalType":
      return [print("typeAnnotation"), "?"];
    case "TSInterfaceDeclaration":
      return printClass(path, options, print);
    case "TSTypeParameterDeclaration":
    case "TSTypeParameterInstantiation":
      return printTypeParameters(path, options, print, "params");
    case "TSTypeParameter":
      return printTypeParameter(path, options, print);
    case "TSAsExpression":