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2x 2x 4035x 4035x 4035x 2x 2x 2x 2x 2x 2x 149x 149x 149x 149x 149x 2x 2x 2x 2x 2x 2x 2x 9557x 9557x | /** @import * as ESTree from 'estree' */ import { regex_is_valid_identifier } from '../phases/patterns.js'; import { sanitize_template_string } from './sanitize_template_string.js'; /** * @param {Array<ESTree.Expression | ESTree.SpreadElement | null>} elements * @returns {ESTree.ArrayExpression} */ export function array(elements = []) { return { type: 'ArrayExpression', elements }; } /** * @param {Array<ESTree.Pattern | null>} elements * @returns {ESTree.ArrayPattern} */ export function array_pattern(elements) { return { type: 'ArrayPattern', elements }; } /** * @param {ESTree.Pattern} left * @param {ESTree.Expression} right * @returns {ESTree.AssignmentPattern} */ export function assignment_pattern(left, right) { return { type: 'AssignmentPattern', left, right }; } /** * @param {Array<ESTree.Pattern>} params * @param {ESTree.BlockStatement | ESTree.Expression} body * @returns {ESTree.ArrowFunctionExpression} */ export function arrow(params, body) { return { type: 'ArrowFunctionExpression', params, body, expression: body.type !== 'BlockStatement', generator: false, async: false, metadata: /** @type {any} */ (null) // should not be used by codegen }; } /** * @param {ESTree.AssignmentOperator} operator * @param {ESTree.Pattern} left * @param {ESTree.Expression} right * @returns {ESTree.AssignmentExpression} */ export function assignment(operator, left, right) { return { type: 'AssignmentExpression', operator, left, right }; } /** * @template T * @param {T & ESTree.BaseFunction} func * @returns {T & ESTree.BaseFunction} */ export function async(func) { return { ...func, async: true }; } /** * @param {ESTree.Expression} argument * @returns {ESTree.AwaitExpression} */ function await_builder(argument) { return { type: 'AwaitExpression', argument }; } /** * @param {ESTree.BinaryOperator} operator * @param {ESTree.Expression} left * @param {ESTree.Expression} right * @returns {ESTree.BinaryExpression} */ export function binary(operator, left, right) { return { type: 'BinaryExpression', operator, left, right }; } /** * @param {ESTree.Statement[]} body * @returns {ESTree.BlockStatement} */ export function block(body) { return { type: 'BlockStatement', body }; } /** * @param {string} name * @param {ESTree.Statement} body * @returns {ESTree.LabeledStatement} */ export function labeled(name, body) { return { type: 'LabeledStatement', label: id(name), body }; } /** * @param {string | ESTree.Expression} callee * @param {...(ESTree.Expression | ESTree.SpreadElement | false | undefined)} args * @returns {ESTree.CallExpression} */ export function call(callee, ...args) { if (typeof callee === 'string') callee = id(callee); args = args.slice(); // replacing missing arguments with `undefined`, unless they're at the end in which case remove them let i = args.length; let popping = true; while (i--) { if (!args[i]) { if (popping) { args.pop(); } else { args[i] = id('undefined'); } } else { popping = false; } } return { type: 'CallExpression', callee, arguments: /** @type {Array<ESTree.Expression | ESTree.SpreadElement>} */ (args), optional: false }; } /** * @param {string | ESTree.Expression} callee * @param {...ESTree.Expression} args * @returns {ESTree.ChainExpression} */ export function maybe_call(callee, ...args) { const expression = /** @type {ESTree.SimpleCallExpression} */ (call(callee, ...args)); expression.optional = true; return { type: 'ChainExpression', expression }; } /** * @param {ESTree.UnaryOperator} operator * @param {ESTree.Expression} argument * @returns {ESTree.UnaryExpression} */ export function unary(operator, argument) { return { type: 'UnaryExpression', argument, operator, prefix: true }; } /** * @param {ESTree.Expression} test * @param {ESTree.Expression} consequent * @param {ESTree.Expression} alternate * @returns {ESTree.ConditionalExpression} */ export function conditional(test, consequent, alternate) { return { type: 'ConditionalExpression', test, consequent, alternate }; } /** * @param {ESTree.LogicalOperator} operator * @param {ESTree.Expression} left * @param {ESTree.Expression} right * @returns {ESTree.LogicalExpression} */ export function logical(operator, left, right) { return { type: 'LogicalExpression', operator, left, right }; } /** * @param {'const' | 'let' | 'var'} kind * @param {ESTree.VariableDeclarator[]} declarations * @returns {ESTree.VariableDeclaration} */ export function declaration(kind, declarations) { return { type: 'VariableDeclaration', kind, declarations }; } /** * @param {ESTree.Pattern | string} pattern * @param {ESTree.Expression} [init] * @returns {ESTree.VariableDeclarator} */ export function declarator(pattern, init) { if (typeof pattern === 'string') pattern = id(pattern); return { type: 'VariableDeclarator', id: pattern, init }; } /** @type {ESTree.EmptyStatement} */ export const empty = { type: 'EmptyStatement' }; /** * @param {ESTree.Expression | ESTree.MaybeNamedClassDeclaration | ESTree.MaybeNamedFunctionDeclaration} declaration * @returns {ESTree.ExportDefaultDeclaration} */ export function export_default(declaration) { return { type: 'ExportDefaultDeclaration', declaration }; } /** * @param {ESTree.Identifier} id * @param {ESTree.Pattern[]} params * @param {ESTree.BlockStatement} body * @returns {ESTree.FunctionDeclaration} */ export function function_declaration(id, params, body) { return { type: 'FunctionDeclaration', id, params, body, generator: false, async: false, metadata: /** @type {any} */ (null) // should not be used by codegen }; } /** * @param {string} name * @param {ESTree.Statement[]} body * @returns {ESTree.Property & { value: ESTree.FunctionExpression}}} */ export function get(name, body) { return prop('get', key(name), function_builder(null, [], block(body))); } /** * @param {string} name * @returns {ESTree.Identifier} */ export function id(name) { return { type: 'Identifier', name }; } /** * @param {string} name * @returns {ESTree.PrivateIdentifier} */ export function private_id(name) { return { type: 'PrivateIdentifier', name }; } /** * @param {string} local * @returns {ESTree.ImportNamespaceSpecifier} */ function import_namespace(local) { return { type: 'ImportNamespaceSpecifier', local: id(local) }; } /** * @param {string} name * @param {ESTree.Expression} value * @returns {ESTree.Property} */ export function init(name, value) { return prop('init', key(name), value); } /** * @param {string | boolean | null | number | RegExp} value * @returns {ESTree.Literal} */ export function literal(value) { // @ts-expect-error we don't want to muck around with bigint here return { type: 'Literal', value }; } /** * @param {ESTree.Expression | ESTree.Super} object * @param {string | ESTree.Expression | ESTree.PrivateIdentifier} property * @param {boolean} computed * @param {boolean} optional * @returns {ESTree.MemberExpression} */ export function member(object, property, computed = false, optional = false) { if (typeof property === 'string') { property = id(property); } return { type: 'MemberExpression', object, property, computed, optional }; } /** * @param {string} path * @returns {ESTree.Identifier | ESTree.MemberExpression} */ export function member_id(path) { const parts = path.split('.'); /** @type {ESTree.Identifier | ESTree.MemberExpression} */ let expression = id(parts[0]); for (let i = 1; i < parts.length; i += 1) { expression = member(expression, id(parts[i])); } return expression; } /** * @param {Array<ESTree.Property | ESTree.SpreadElement>} properties * @returns {ESTree.ObjectExpression} */ export function object(properties) { return { type: 'ObjectExpression', properties }; } /** * @param {Array<ESTree.RestElement | ESTree.AssignmentProperty | ESTree.Property>} properties * @returns {ESTree.ObjectPattern} */ export function object_pattern(properties) { // @ts-expect-error the types appear to be wrong return { type: 'ObjectPattern', properties }; } /** * @template {ESTree.Expression} Value * @param {'init' | 'get' | 'set'} kind * @param {ESTree.Expression} key * @param {Value} value * @param {boolean} computed * @returns {ESTree.Property & { value: Value }} */ export function prop(kind, key, value, computed = false) { return { type: 'Property', kind, key, value, method: false, shorthand: false, computed }; } /** * @param {ESTree.Expression | ESTree.PrivateIdentifier} key * @param {ESTree.Expression | null | undefined} value * @param {boolean} computed * @param {boolean} is_static * @returns {ESTree.PropertyDefinition} */ export function prop_def(key, value, computed = false, is_static = false) { return { type: 'PropertyDefinition', key, value, computed, static: is_static, decorators: [] }; } /** * @param {string} cooked * @param {boolean} tail * @returns {ESTree.TemplateElement} */ export function quasi(cooked, tail = false) { const raw = sanitize_template_string(cooked); return { type: 'TemplateElement', value: { raw, cooked }, tail }; } /** * @param {ESTree.Pattern} argument * @returns {ESTree.RestElement} */ export function rest(argument) { return { type: 'RestElement', argument }; } /** * @param {ESTree.Expression[]} expressions * @returns {ESTree.SequenceExpression} */ export function sequence(expressions) { return { type: 'SequenceExpression', expressions }; } /** * @param {string} name * @param {ESTree.Statement[]} body * @returns {ESTree.Property & { value: ESTree.FunctionExpression}} */ export function set(name, body) { return prop('set', key(name), function_builder(null, [id('$$value')], block(body))); } /** * @param {ESTree.Expression} argument * @returns {ESTree.SpreadElement} */ export function spread(argument) { return { type: 'SpreadElement', argument }; } /** * @param {ESTree.Expression} expression * @returns {ESTree.ExpressionStatement} */ export function stmt(expression) { return { type: 'ExpressionStatement', expression }; } /** * @param {ESTree.TemplateElement[]} elements * @param {ESTree.Expression[]} expressions * @returns {ESTree.TemplateLiteral} */ export function template(elements, expressions) { return { type: 'TemplateLiteral', quasis: elements, expressions }; } /** * @param {ESTree.Expression | ESTree.BlockStatement} expression * @param {boolean} [async] * @returns {ESTree.Expression} */ export function thunk(expression, async = false) { const fn = arrow([], expression); if (async) fn.async = true; return unthunk(fn); } /** * Replace "(arg) => func(arg)" to "func" * @param {ESTree.Expression} expression * @returns {ESTree.Expression} */ export function unthunk(expression) { if ( expression.type === 'ArrowFunctionExpression' && expression.async === false && expression.body.type === 'CallExpression' && expression.body.callee.type === 'Identifier' && expression.params.length === expression.body.arguments.length && expression.params.every((param, index) => { const arg = /** @type {ESTree.SimpleCallExpression} */ (expression.body).arguments[index]; return param.type === 'Identifier' && arg.type === 'Identifier' && param.name === arg.name; }) ) { return expression.body.callee; } return expression; } /** * * @param {string | ESTree.Expression} expression * @param {...ESTree.Expression} args * @returns {ESTree.NewExpression} */ function new_builder(expression, ...args) { if (typeof expression === 'string') expression = id(expression); return { callee: expression, arguments: args, type: 'NewExpression' }; } /** * @param {ESTree.UpdateOperator} operator * @param {ESTree.Expression} argument * @param {boolean} prefix * @returns {ESTree.UpdateExpression} */ export function update(operator, argument, prefix = false) { return { type: 'UpdateExpression', operator, argument, prefix }; } /** * @param {ESTree.Expression} test * @param {ESTree.Statement} body * @returns {ESTree.DoWhileStatement} */ export function do_while(test, body) { return { type: 'DoWhileStatement', test, body }; } const true_instance = literal(true); const false_instance = literal(false); const null_instane = literal(null); /** @type {ESTree.DebuggerStatement} */ const debugger_builder = { type: 'DebuggerStatement' }; /** @type {ESTree.ThisExpression} */ const this_instance = { type: 'ThisExpression' }; /** * @param {string | ESTree.Pattern} pattern * @param { ESTree.Expression} [init] * @returns {ESTree.VariableDeclaration} */ function let_builder(pattern, init) { return declaration('let', [declarator(pattern, init)]); } /** * @param {string | ESTree.Pattern} pattern * @param { ESTree.Expression} init * @returns {ESTree.VariableDeclaration} */ function const_builder(pattern, init) { return declaration('const', [declarator(pattern, init)]); } /** * @param {string | ESTree.Pattern} pattern * @param { ESTree.Expression} [init] * @returns {ESTree.VariableDeclaration} */ function var_builder(pattern, init) { return declaration('var', [declarator(pattern, init)]); } /** * * @param {ESTree.VariableDeclaration | ESTree.Expression | null} init * @param {ESTree.Expression} test * @param {ESTree.Expression} update * @param {ESTree.Statement} body * @returns {ESTree.ForStatement} */ function for_builder(init, test, update, body) { return { type: 'ForStatement', init, test, update, body }; } /** * * @param {'constructor' | 'method' | 'get' | 'set'} kind * @param {ESTree.Expression | ESTree.PrivateIdentifier} key * @param {ESTree.Pattern[]} params * @param {ESTree.Statement[]} body * @param {boolean} computed * @param {boolean} is_static * @returns {ESTree.MethodDefinition} */ export function method(kind, key, params, body, computed = false, is_static = false) { return { type: 'MethodDefinition', key, kind, value: function_builder(null, params, block(body)), computed, static: is_static, decorators: [] }; } /** * * @param {ESTree.Identifier | null} id * @param {ESTree.Pattern[]} params * @param {ESTree.BlockStatement} body * @returns {ESTree.FunctionExpression} */ function function_builder(id, params, body) { return { type: 'FunctionExpression', id, params, body, generator: false, async: false, metadata: /** @type {any} */ (null) // should not be used by codegen }; } /** * @param {ESTree.Expression} test * @param {ESTree.Statement} consequent * @param {ESTree.Statement} [alternate] * @returns {ESTree.IfStatement} */ function if_builder(test, consequent, alternate) { return { type: 'IfStatement', test, consequent, alternate }; } /** * @param {string} as * @param {string} source * @returns {ESTree.ImportDeclaration} */ export function import_all(as, source) { return { type: 'ImportDeclaration', source: literal(source), specifiers: [import_namespace(as)] }; } /** * @param {Array<[string, string]>} parts * @param {string} source * @returns {ESTree.ImportDeclaration} */ export function imports(parts, source) { return { type: 'ImportDeclaration', source: literal(source), specifiers: parts.map((p) => ({ type: 'ImportSpecifier', imported: id(p[0]), local: id(p[1]) })) }; } /** * @param {ESTree.Expression | null} argument * @returns {ESTree.ReturnStatement} */ function return_builder(argument = null) { return { type: 'ReturnStatement', argument }; } /** * @param {string} str * @returns {ESTree.ThrowStatement} */ export function throw_error(str) { return { type: 'ThrowStatement', argument: new_builder('Error', literal(str)) }; } export { await_builder as await, let_builder as let, const_builder as const, var_builder as var, true_instance as true, false_instance as false, for_builder as for, function_builder as function, return_builder as return, if_builder as if, this_instance as this, null_instane as null, debugger_builder as debugger }; /** * @param {string} name * @returns {ESTree.Expression} */ export function key(name) { return regex_is_valid_identifier.test(name) ? id(name) : literal(name); } |