1333 lines
42 KiB
JavaScript
1333 lines
42 KiB
JavaScript
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"use strict";Object.defineProperty(exports, "__esModule", {value: true});/* eslint max-len: 0 */
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var _index = require('../index');
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var _flow = require('../plugins/flow');
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var _typescript = require('../plugins/typescript');
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var _tokenizer = require('../tokenizer');
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var _keywords = require('../tokenizer/keywords');
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var _state = require('../tokenizer/state');
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var _types = require('../tokenizer/types');
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var _charcodes = require('../util/charcodes');
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var _base = require('./base');
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var _expression = require('./expression');
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var _lval = require('./lval');
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var _util = require('./util');
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function parseTopLevel() {
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parseBlockBody(_types.TokenType.eof);
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_base.state.scopes.push(new (0, _state.Scope)(0, _base.state.tokens.length, true));
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if (_base.state.scopeDepth !== 0) {
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throw new Error(`Invalid scope depth at end of file: ${_base.state.scopeDepth}`);
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}
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return new (0, _index.File)(_base.state.tokens, _base.state.scopes);
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} exports.parseTopLevel = parseTopLevel;
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// Parse a single statement.
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//
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// If expecting a statement and finding a slash operator, parse a
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// regular expression literal. This is to handle cases like
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// `if (foo) /blah/.exec(foo)`, where looking at the previous token
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// does not help.
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function parseStatement(declaration) {
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if (_base.isFlowEnabled) {
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if (_flow.flowTryParseStatement.call(void 0, )) {
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return;
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}
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}
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if (_tokenizer.match.call(void 0, _types.TokenType.at)) {
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parseDecorators();
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}
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parseStatementContent(declaration);
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} exports.parseStatement = parseStatement;
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function parseStatementContent(declaration) {
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if (_base.isTypeScriptEnabled) {
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if (_typescript.tsTryParseStatementContent.call(void 0, )) {
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return;
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}
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}
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const starttype = _base.state.type;
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// Most types of statements are recognized by the keyword they
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// start with. Many are trivial to parse, some require a bit of
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// complexity.
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switch (starttype) {
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case _types.TokenType._break:
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case _types.TokenType._continue:
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parseBreakContinueStatement();
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return;
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case _types.TokenType._debugger:
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parseDebuggerStatement();
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return;
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case _types.TokenType._do:
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parseDoStatement();
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return;
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case _types.TokenType._for:
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parseForStatement();
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return;
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case _types.TokenType._function:
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if (_tokenizer.lookaheadType.call(void 0, ) === _types.TokenType.dot) break;
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if (!declaration) _util.unexpected.call(void 0, );
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parseFunctionStatement();
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return;
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case _types.TokenType._class:
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if (!declaration) _util.unexpected.call(void 0, );
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parseClass(true);
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return;
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case _types.TokenType._if:
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parseIfStatement();
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return;
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case _types.TokenType._return:
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parseReturnStatement();
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return;
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case _types.TokenType._switch:
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parseSwitchStatement();
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return;
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case _types.TokenType._throw:
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parseThrowStatement();
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return;
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case _types.TokenType._try:
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parseTryStatement();
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return;
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case _types.TokenType._let:
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case _types.TokenType._const:
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if (!declaration) _util.unexpected.call(void 0, ); // NOTE: falls through to _var
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case _types.TokenType._var:
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parseVarStatement(starttype !== _types.TokenType._var);
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return;
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case _types.TokenType._while:
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parseWhileStatement();
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return;
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case _types.TokenType.braceL:
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parseBlock();
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return;
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case _types.TokenType.semi:
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parseEmptyStatement();
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return;
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case _types.TokenType._export:
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case _types.TokenType._import: {
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const nextType = _tokenizer.lookaheadType.call(void 0, );
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if (nextType === _types.TokenType.parenL || nextType === _types.TokenType.dot) {
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break;
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}
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_tokenizer.next.call(void 0, );
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if (starttype === _types.TokenType._import) {
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parseImport();
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} else {
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parseExport();
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}
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return;
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}
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case _types.TokenType.name:
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if (_base.state.contextualKeyword === _keywords.ContextualKeyword._async) {
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const functionStart = _base.state.start;
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// peek ahead and see if next token is a function
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const snapshot = _base.state.snapshot();
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_tokenizer.next.call(void 0, );
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if (_tokenizer.match.call(void 0, _types.TokenType._function) && !_util.canInsertSemicolon.call(void 0, )) {
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_util.expect.call(void 0, _types.TokenType._function);
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parseFunction(functionStart, true);
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return;
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} else {
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_base.state.restoreFromSnapshot(snapshot);
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}
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} else if (
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_base.state.contextualKeyword === _keywords.ContextualKeyword._using &&
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!_util.hasFollowingLineBreak.call(void 0, ) &&
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// Statements like `using[0]` and `using in foo` aren't actual using
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// declarations.
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_tokenizer.lookaheadType.call(void 0, ) === _types.TokenType.name
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) {
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parseVarStatement(true);
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return;
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} else if (startsAwaitUsing()) {
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_util.expectContextual.call(void 0, _keywords.ContextualKeyword._await);
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parseVarStatement(true);
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return;
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}
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default:
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// Do nothing.
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break;
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}
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// If the statement does not start with a statement keyword or a
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// brace, it's an ExpressionStatement or LabeledStatement. We
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// simply start parsing an expression, and afterwards, if the
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// next token is a colon and the expression was a simple
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// Identifier node, we switch to interpreting it as a label.
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const initialTokensLength = _base.state.tokens.length;
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_expression.parseExpression.call(void 0, );
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let simpleName = null;
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if (_base.state.tokens.length === initialTokensLength + 1) {
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const token = _base.state.tokens[_base.state.tokens.length - 1];
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if (token.type === _types.TokenType.name) {
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simpleName = token.contextualKeyword;
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}
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}
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if (simpleName == null) {
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_util.semicolon.call(void 0, );
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return;
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}
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if (_tokenizer.eat.call(void 0, _types.TokenType.colon)) {
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parseLabeledStatement();
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} else {
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// This was an identifier, so we might want to handle flow/typescript-specific cases.
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parseIdentifierStatement(simpleName);
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}
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}
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/**
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* Determine if we're positioned at an `await using` declaration.
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*
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* Note that this can happen either in place of a regular variable declaration
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* or in a loop body, and in both places, there are similar-looking cases where
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* we need to return false.
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*
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* Examples returning true:
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* await using foo = bar();
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* for (await using a of b) {}
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*
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* Examples returning false:
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* await using
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* await using + 1
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* await using instanceof T
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* for (await using;;) {}
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*
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* For now, we early return if we don't see `await`, then do a simple
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* backtracking-based lookahead for the `using` and identifier tokens. In the
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* future, this could be optimized with a character-based approach.
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*/
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function startsAwaitUsing() {
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if (!_util.isContextual.call(void 0, _keywords.ContextualKeyword._await)) {
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return false;
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}
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const snapshot = _base.state.snapshot();
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// await
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_tokenizer.next.call(void 0, );
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if (!_util.isContextual.call(void 0, _keywords.ContextualKeyword._using) || _util.hasPrecedingLineBreak.call(void 0, )) {
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_base.state.restoreFromSnapshot(snapshot);
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return false;
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}
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// using
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_tokenizer.next.call(void 0, );
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if (!_tokenizer.match.call(void 0, _types.TokenType.name) || _util.hasPrecedingLineBreak.call(void 0, )) {
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_base.state.restoreFromSnapshot(snapshot);
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return false;
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}
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_base.state.restoreFromSnapshot(snapshot);
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return true;
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}
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function parseDecorators() {
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while (_tokenizer.match.call(void 0, _types.TokenType.at)) {
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parseDecorator();
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}
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} exports.parseDecorators = parseDecorators;
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function parseDecorator() {
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_tokenizer.next.call(void 0, );
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if (_tokenizer.eat.call(void 0, _types.TokenType.parenL)) {
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_expression.parseExpression.call(void 0, );
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_util.expect.call(void 0, _types.TokenType.parenR);
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} else {
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_expression.parseIdentifier.call(void 0, );
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while (_tokenizer.eat.call(void 0, _types.TokenType.dot)) {
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_expression.parseIdentifier.call(void 0, );
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}
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parseMaybeDecoratorArguments();
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}
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}
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function parseMaybeDecoratorArguments() {
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if (_base.isTypeScriptEnabled) {
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_typescript.tsParseMaybeDecoratorArguments.call(void 0, );
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} else {
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baseParseMaybeDecoratorArguments();
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}
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}
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function baseParseMaybeDecoratorArguments() {
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if (_tokenizer.eat.call(void 0, _types.TokenType.parenL)) {
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_expression.parseCallExpressionArguments.call(void 0, );
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}
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} exports.baseParseMaybeDecoratorArguments = baseParseMaybeDecoratorArguments;
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function parseBreakContinueStatement() {
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_tokenizer.next.call(void 0, );
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if (!_util.isLineTerminator.call(void 0, )) {
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_expression.parseIdentifier.call(void 0, );
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_util.semicolon.call(void 0, );
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}
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}
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function parseDebuggerStatement() {
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_tokenizer.next.call(void 0, );
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_util.semicolon.call(void 0, );
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}
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function parseDoStatement() {
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_tokenizer.next.call(void 0, );
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parseStatement(false);
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_util.expect.call(void 0, _types.TokenType._while);
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_expression.parseParenExpression.call(void 0, );
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_tokenizer.eat.call(void 0, _types.TokenType.semi);
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}
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function parseForStatement() {
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_base.state.scopeDepth++;
|
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const startTokenIndex = _base.state.tokens.length;
|
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parseAmbiguousForStatement();
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const endTokenIndex = _base.state.tokens.length;
|
||
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_base.state.scopes.push(new (0, _state.Scope)(startTokenIndex, endTokenIndex, false));
|
||
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_base.state.scopeDepth--;
|
||
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}
|
||
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/**
|
||
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* Determine if this token is a `using` declaration (explicit resource
|
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* management) as part of a loop.
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||
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* https://github.com/tc39/proposal-explicit-resource-management
|
||
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*/
|
||
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function isUsingInLoop() {
|
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if (!_util.isContextual.call(void 0, _keywords.ContextualKeyword._using)) {
|
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return false;
|
||
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}
|
||
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// This must be `for (using of`, where `using` is the name of the loop
|
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// variable.
|
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if (_util.isLookaheadContextual.call(void 0, _keywords.ContextualKeyword._of)) {
|
||
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return false;
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||
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}
|
||
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return true;
|
||
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}
|
||
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// Disambiguating between a `for` and a `for`/`in` or `for`/`of`
|
||
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// loop is non-trivial. Basically, we have to parse the init `var`
|
||
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// statement or expression, disallowing the `in` operator (see
|
||
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// the second parameter to `parseExpression`), and then check
|
||
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// whether the next token is `in` or `of`. When there is no init
|
||
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// part (semicolon immediately after the opening parenthesis), it
|
||
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// is a regular `for` loop.
|
||
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function parseAmbiguousForStatement() {
|
||
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_tokenizer.next.call(void 0, );
|
||
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let forAwait = false;
|
||
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if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._await)) {
|
||
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forAwait = true;
|
||
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_tokenizer.next.call(void 0, );
|
||
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}
|
||
|
|
_util.expect.call(void 0, _types.TokenType.parenL);
|
||
|
|
|
||
|
|
if (_tokenizer.match.call(void 0, _types.TokenType.semi)) {
|
||
|
|
if (forAwait) {
|
||
|
|
_util.unexpected.call(void 0, );
|
||
|
|
}
|
||
|
|
parseFor();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
const isAwaitUsing = startsAwaitUsing();
|
||
|
|
if (isAwaitUsing || _tokenizer.match.call(void 0, _types.TokenType._var) || _tokenizer.match.call(void 0, _types.TokenType._let) || _tokenizer.match.call(void 0, _types.TokenType._const) || isUsingInLoop()) {
|
||
|
|
if (isAwaitUsing) {
|
||
|
|
_util.expectContextual.call(void 0, _keywords.ContextualKeyword._await);
|
||
|
|
}
|
||
|
|
_tokenizer.next.call(void 0, );
|
||
|
|
parseVar(true, _base.state.type !== _types.TokenType._var);
|
||
|
|
if (_tokenizer.match.call(void 0, _types.TokenType._in) || _util.isContextual.call(void 0, _keywords.ContextualKeyword._of)) {
|
||
|
|
parseForIn(forAwait);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
parseFor();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
_expression.parseExpression.call(void 0, true);
|
||
|
|
if (_tokenizer.match.call(void 0, _types.TokenType._in) || _util.isContextual.call(void 0, _keywords.ContextualKeyword._of)) {
|
||
|
|
parseForIn(forAwait);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (forAwait) {
|
||
|
|
_util.unexpected.call(void 0, );
|
||
|
|
}
|
||
|
|
parseFor();
|
||
|
|
}
|
||
|
|
|
||
|
|
function parseFunctionStatement() {
|
||
|
|
const functionStart = _base.state.start;
|
||
|
|
_tokenizer.next.call(void 0, );
|
||
|
|
parseFunction(functionStart, true);
|
||
|
|
}
|
||
|
|
|
||
|
|
function parseIfStatement() {
|
||
|
|
_tokenizer.next.call(void 0, );
|
||
|
|
_expression.parseParenExpression.call(void 0, );
|
||
|
|
parseStatement(false);
|
||
|
|
if (_tokenizer.eat.call(void 0, _types.TokenType._else)) {
|
||
|
|
parseStatement(false);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function parseReturnStatement() {
|
||
|
|
_tokenizer.next.call(void 0, );
|
||
|
|
|
||
|
|
// In `return` (and `break`/`continue`), the keywords with
|
||
|
|
// optional arguments, we eagerly look for a semicolon or the
|
||
|
|
// possibility to insert one.
|
||
|
|
|
||
|
|
if (!_util.isLineTerminator.call(void 0, )) {
|
||
|
|
_expression.parseExpression.call(void 0, );
|
||
|
|
_util.semicolon.call(void 0, );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function parseSwitchStatement() {
|
||
|
|
_tokenizer.next.call(void 0, );
|
||
|
|
_expression.parseParenExpression.call(void 0, );
|
||
|
|
_base.state.scopeDepth++;
|
||
|
|
const startTokenIndex = _base.state.tokens.length;
|
||
|
|
_util.expect.call(void 0, _types.TokenType.braceL);
|
||
|
|
|
||
|
|
// Don't bother validation; just go through any sequence of cases, defaults, and statements.
|
||
|
|
while (!_tokenizer.match.call(void 0, _types.TokenType.braceR) && !_base.state.error) {
|
||
|
|
if (_tokenizer.match.call(void 0, _types.TokenType._case) || _tokenizer.match.call(void 0, _types.TokenType._default)) {
|
||
|
|
const isCase = _tokenizer.match.call(void 0, _types.TokenType._case);
|
||
|
|
_tokenizer.next.call(void 0, );
|
||
|
|
if (isCase) {
|
||
|
|
_expression.parseExpression.call(void 0, );
|
||
|
|
}
|
||
|
|
_util.expect.call(void 0, _types.TokenType.colon);
|
||
|
|
} else {
|
||
|
|
parseStatement(true);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
_tokenizer.next.call(void 0, ); // Closing brace
|
||
|
|
const endTokenIndex = _base.state.tokens.length;
|
||
|
|
_base.state.scopes.push(new (0, _state.Scope)(startTokenIndex, endTokenIndex, false));
|
||
|
|
_base.state.scopeDepth--;
|
||
|
|
}
|
||
|
|
|
||
|
|
function parseThrowStatement() {
|
||
|
|
_tokenizer.next.call(void 0, );
|
||
|
|
_expression.parseExpression.call(void 0, );
|
||
|
|
_util.semicolon.call(void 0, );
|
||
|
|
}
|
||
|
|
|
||
|
|
function parseCatchClauseParam() {
|
||
|
|
_lval.parseBindingAtom.call(void 0, true /* isBlockScope */);
|
||
|
|
|
||
|
|
if (_base.isTypeScriptEnabled) {
|
||
|
|
_typescript.tsTryParseTypeAnnotation.call(void 0, );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function parseTryStatement() {
|
||
|
|
_tokenizer.next.call(void 0, );
|
||
|
|
|
||
|
|
parseBlock();
|
||
|
|
|
||
|
|
if (_tokenizer.match.call(void 0, _types.TokenType._catch)) {
|
||
|
|
_tokenizer.next.call(void 0, );
|
||
|
|
let catchBindingStartTokenIndex = null;
|
||
|
|
if (_tokenizer.match.call(void 0, _types.TokenType.parenL)) {
|
||
|
|
_base.state.scopeDepth++;
|
||
|
|
catchBindingStartTokenIndex = _base.state.tokens.length;
|
||
|
|
_util.expect.call(void 0, _types.TokenType.parenL);
|
||
|
|
parseCatchClauseParam();
|
||
|
|
_util.expect.call(void 0, _types.TokenType.parenR);
|
||
|
|
}
|
||
|
|
parseBlock();
|
||
|
|
if (catchBindingStartTokenIndex != null) {
|
||
|
|
// We need a special scope for the catch binding which includes the binding itself and the
|
||
|
|
// catch block.
|
||
|
|
const endTokenIndex = _base.state.tokens.length;
|
||
|
|
_base.state.scopes.push(new (0, _state.Scope)(catchBindingStartTokenIndex, endTokenIndex, false));
|
||
|
|
_base.state.scopeDepth--;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (_tokenizer.eat.call(void 0, _types.TokenType._finally)) {
|
||
|
|
parseBlock();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function parseVarStatement(isBlockScope) {
|
||
|
|
_tokenizer.next.call(void 0, );
|
||
|
|
parseVar(false, isBlockScope);
|
||
|
|
_util.semicolon.call(void 0, );
|
||
|
|
} exports.parseVarStatement = parseVarStatement;
|
||
|
|
|
||
|
|
function parseWhileStatement() {
|
||
|
|
_tokenizer.next.call(void 0, );
|
||
|
|
_expression.parseParenExpression.call(void 0, );
|
||
|
|
parseStatement(false);
|
||
|
|
}
|
||
|
|
|
||
|
|
function parseEmptyStatement() {
|
||
|
|
_tokenizer.next.call(void 0, );
|
||
|
|
}
|
||
|
|
|
||
|
|
function parseLabeledStatement() {
|
||
|
|
parseStatement(true);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Parse a statement starting with an identifier of the given name. Subclasses match on the name
|
||
|
|
* to handle statements like "declare".
|
||
|
|
*/
|
||
|
|
function parseIdentifierStatement(contextualKeyword) {
|
||
|
|
if (_base.isTypeScriptEnabled) {
|
||
|
|
_typescript.tsParseIdentifierStatement.call(void 0, contextualKeyword);
|
||
|
|
} else if (_base.isFlowEnabled) {
|
||
|
|
_flow.flowParseIdentifierStatement.call(void 0, contextualKeyword);
|
||
|
|
} else {
|
||
|
|
_util.semicolon.call(void 0, );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Parse a semicolon-enclosed block of statements.
|
||
|
|
function parseBlock(isFunctionScope = false, contextId = 0) {
|
||
|
|
const startTokenIndex = _base.state.tokens.length;
|
||
|
|
_base.state.scopeDepth++;
|
||
|
|
_util.expect.call(void 0, _types.TokenType.braceL);
|
||
|
|
if (contextId) {
|
||
|
|
_base.state.tokens[_base.state.tokens.length - 1].contextId = contextId;
|
||
|
|
}
|
||
|
|
parseBlockBody(_types.TokenType.braceR);
|
||
|
|
if (contextId) {
|
||
|
|
_base.state.tokens[_base.state.tokens.length - 1].contextId = contextId;
|
||
|
|
}
|
||
|
|
const endTokenIndex = _base.state.tokens.length;
|
||
|
|
_base.state.scopes.push(new (0, _state.Scope)(startTokenIndex, endTokenIndex, isFunctionScope));
|
||
|
|
_base.state.scopeDepth--;
|
||
|
|
} exports.parseBlock = parseBlock;
|
||
|
|
|
||
|
|
function parseBlockBody(end) {
|
||
|
|
while (!_tokenizer.eat.call(void 0, end) && !_base.state.error) {
|
||
|
|
parseStatement(true);
|
||
|
|
}
|
||
|
|
} exports.parseBlockBody = parseBlockBody;
|
||
|
|
|
||
|
|
// Parse a regular `for` loop. The disambiguation code in
|
||
|
|
// `parseStatement` will already have parsed the init statement or
|
||
|
|
// expression.
|
||
|
|
|
||
|
|
function parseFor() {
|
||
|
|
_util.expect.call(void 0, _types.TokenType.semi);
|
||
|
|
if (!_tokenizer.match.call(void 0, _types.TokenType.semi)) {
|
||
|
|
_expression.parseExpression.call(void 0, );
|
||
|
|
}
|
||
|
|
_util.expect.call(void 0, _types.TokenType.semi);
|
||
|
|
if (!_tokenizer.match.call(void 0, _types.TokenType.parenR)) {
|
||
|
|
_expression.parseExpression.call(void 0, );
|
||
|
|
}
|
||
|
|
_util.expect.call(void 0, _types.TokenType.parenR);
|
||
|
|
parseStatement(false);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Parse a `for`/`in` and `for`/`of` loop, which are almost
|
||
|
|
// same from parser's perspective.
|
||
|
|
|
||
|
|
function parseForIn(forAwait) {
|
||
|
|
if (forAwait) {
|
||
|
|
_util.eatContextual.call(void 0, _keywords.ContextualKeyword._of);
|
||
|
|
} else {
|
||
|
|
_tokenizer.next.call(void 0, );
|
||
|
|
}
|
||
|
|
_expression.parseExpression.call(void 0, );
|
||
|
|
_util.expect.call(void 0, _types.TokenType.parenR);
|
||
|
|
parseStatement(false);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Parse a list of variable declarations.
|
||
|
|
|
||
|
|
function parseVar(isFor, isBlockScope) {
|
||
|
|
while (true) {
|
||
|
|
parseVarHead(isBlockScope);
|
||
|
|
if (_tokenizer.eat.call(void 0, _types.TokenType.eq)) {
|
||
|
|
const eqIndex = _base.state.tokens.length - 1;
|
||
|
|
_expression.parseMaybeAssign.call(void 0, isFor);
|
||
|
|
_base.state.tokens[eqIndex].rhsEndIndex = _base.state.tokens.length;
|
||
|
|
}
|
||
|
|
if (!_tokenizer.eat.call(void 0, _types.TokenType.comma)) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function parseVarHead(isBlockScope) {
|
||
|
|
_lval.parseBindingAtom.call(void 0, isBlockScope);
|
||
|
|
if (_base.isTypeScriptEnabled) {
|
||
|
|
_typescript.tsAfterParseVarHead.call(void 0, );
|
||
|
|
} else if (_base.isFlowEnabled) {
|
||
|
|
_flow.flowAfterParseVarHead.call(void 0, );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Parse a function declaration or literal (depending on the
|
||
|
|
// `isStatement` parameter).
|
||
|
|
|
||
|
|
function parseFunction(
|
||
|
|
functionStart,
|
||
|
|
isStatement,
|
||
|
|
optionalId = false,
|
||
|
|
) {
|
||
|
|
if (_tokenizer.match.call(void 0, _types.TokenType.star)) {
|
||
|
|
_tokenizer.next.call(void 0, );
|
||
|
|
}
|
||
|
|
|
||
|
|
if (isStatement && !optionalId && !_tokenizer.match.call(void 0, _types.TokenType.name) && !_tokenizer.match.call(void 0, _types.TokenType._yield)) {
|
||
|
|
_util.unexpected.call(void 0, );
|
||
|
|
}
|
||
|
|
|
||
|
|
let nameScopeStartTokenIndex = null;
|
||
|
|
|
||
|
|
if (_tokenizer.match.call(void 0, _types.TokenType.name)) {
|
||
|
|
// Expression-style functions should limit their name's scope to the function body, so we make
|
||
|
|
// a new function scope to enforce that.
|
||
|
|
if (!isStatement) {
|
||
|
|
nameScopeStartTokenIndex = _base.state.tokens.length;
|
||
|
|
_base.state.scopeDepth++;
|
||
|
|
}
|
||
|
|
_lval.parseBindingIdentifier.call(void 0, false);
|
||
|
|
}
|
||
|
|
|
||
|
|
const startTokenIndex = _base.state.tokens.length;
|
||
|
|
_base.state.scopeDepth++;
|
||
|
|
parseFunctionParams();
|
||
|
|
_expression.parseFunctionBodyAndFinish.call(void 0, functionStart);
|
||
|
|
const endTokenIndex = _base.state.tokens.length;
|
||
|
|
// In addition to the block scope of the function body, we need a separate function-style scope
|
||
|
|
// that includes the params.
|
||
|
|
_base.state.scopes.push(new (0, _state.Scope)(startTokenIndex, endTokenIndex, true));
|
||
|
|
_base.state.scopeDepth--;
|
||
|
|
if (nameScopeStartTokenIndex !== null) {
|
||
|
|
_base.state.scopes.push(new (0, _state.Scope)(nameScopeStartTokenIndex, endTokenIndex, true));
|
||
|
|
_base.state.scopeDepth--;
|
||
|
|
}
|
||
|
|
} exports.parseFunction = parseFunction;
|
||
|
|
|
||
|
|
function parseFunctionParams(
|
||
|
|
allowModifiers = false,
|
||
|
|
funcContextId = 0,
|
||
|
|
) {
|
||
|
|
if (_base.isTypeScriptEnabled) {
|
||
|
|
_typescript.tsStartParseFunctionParams.call(void 0, );
|
||
|
|
} else if (_base.isFlowEnabled) {
|
||
|
|
_flow.flowStartParseFunctionParams.call(void 0, );
|
||
|
|
}
|
||
|
|
|
||
|
|
_util.expect.call(void 0, _types.TokenType.parenL);
|
||
|
|
if (funcContextId) {
|
||
|
|
_base.state.tokens[_base.state.tokens.length - 1].contextId = funcContextId;
|
||
|
|
}
|
||
|
|
_lval.parseBindingList.call(void 0,
|
||
|
|
_types.TokenType.parenR,
|
||
|
|
false /* isBlockScope */,
|
||
|
|
false /* allowEmpty */,
|
||
|
|
allowModifiers,
|
||
|
|
funcContextId,
|
||
|
|
);
|
||
|
|
if (funcContextId) {
|
||
|
|
_base.state.tokens[_base.state.tokens.length - 1].contextId = funcContextId;
|
||
|
|
}
|
||
|
|
} exports.parseFunctionParams = parseFunctionParams;
|
||
|
|
|
||
|
|
// Parse a class declaration or literal (depending on the
|
||
|
|
// `isStatement` parameter).
|
||
|
|
|
||
|
|
function parseClass(isStatement, optionalId = false) {
|
||
|
|
// Put a context ID on the class keyword, the open-brace, and the close-brace, so that later
|
||
|
|
// code can easily navigate to meaningful points on the class.
|
||
|
|
const contextId = _base.getNextContextId.call(void 0, );
|
||
|
|
|
||
|
|
_tokenizer.next.call(void 0, );
|
||
|
|
_base.state.tokens[_base.state.tokens.length - 1].contextId = contextId;
|
||
|
|
_base.state.tokens[_base.state.tokens.length - 1].isExpression = !isStatement;
|
||
|
|
// Like with functions, we declare a special "name scope" from the start of the name to the end
|
||
|
|
// of the class, but only with expression-style classes, to represent the fact that the name is
|
||
|
|
// available to the body of the class but not an outer declaration.
|
||
|
|
let nameScopeStartTokenIndex = null;
|
||
|
|
if (!isStatement) {
|
||
|
|
nameScopeStartTokenIndex = _base.state.tokens.length;
|
||
|
|
_base.state.scopeDepth++;
|
||
|
|
}
|
||
|
|
parseClassId(isStatement, optionalId);
|
||
|
|
parseClassSuper();
|
||
|
|
const openBraceIndex = _base.state.tokens.length;
|
||
|
|
parseClassBody(contextId);
|
||
|
|
if (_base.state.error) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
_base.state.tokens[openBraceIndex].contextId = contextId;
|
||
|
|
_base.state.tokens[_base.state.tokens.length - 1].contextId = contextId;
|
||
|
|
if (nameScopeStartTokenIndex !== null) {
|
||
|
|
const endTokenIndex = _base.state.tokens.length;
|
||
|
|
_base.state.scopes.push(new (0, _state.Scope)(nameScopeStartTokenIndex, endTokenIndex, false));
|
||
|
|
_base.state.scopeDepth--;
|
||
|
|
}
|
||
|
|
} exports.parseClass = parseClass;
|
||
|
|
|
||
|
|
function isClassProperty() {
|
||
|
|
return _tokenizer.match.call(void 0, _types.TokenType.eq) || _tokenizer.match.call(void 0, _types.TokenType.semi) || _tokenizer.match.call(void 0, _types.TokenType.braceR) || _tokenizer.match.call(void 0, _types.TokenType.bang) || _tokenizer.match.call(void 0, _types.TokenType.colon);
|
||
|
|
}
|
||
|
|
|
||
|
|
function isClassMethod() {
|
||
|
|
return _tokenizer.match.call(void 0, _types.TokenType.parenL) || _tokenizer.match.call(void 0, _types.TokenType.lessThan);
|
||
|
|
}
|
||
|
|
|
||
|
|
function parseClassBody(classContextId) {
|
||
|
|
_util.expect.call(void 0, _types.TokenType.braceL);
|
||
|
|
|
||
|
|
while (!_tokenizer.eat.call(void 0, _types.TokenType.braceR) && !_base.state.error) {
|
||
|
|
if (_tokenizer.eat.call(void 0, _types.TokenType.semi)) {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (_tokenizer.match.call(void 0, _types.TokenType.at)) {
|
||
|
|
parseDecorator();
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
const memberStart = _base.state.start;
|
||
|
|
parseClassMember(memberStart, classContextId);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function parseClassMember(memberStart, classContextId) {
|
||
|
|
if (_base.isTypeScriptEnabled) {
|
||
|
|
_typescript.tsParseModifiers.call(void 0, [
|
||
|
|
_keywords.ContextualKeyword._declare,
|
||
|
|
_keywords.ContextualKeyword._public,
|
||
|
|
_keywords.ContextualKeyword._protected,
|
||
|
|
_keywords.ContextualKeyword._private,
|
||
|
|
_keywords.ContextualKeyword._override,
|
||
|
|
]);
|
||
|
|
}
|
||
|
|
let isStatic = false;
|
||
|
|
if (_tokenizer.match.call(void 0, _types.TokenType.name) && _base.state.contextualKeyword === _keywords.ContextualKeyword._static) {
|
||
|
|
_expression.parseIdentifier.call(void 0, ); // eats 'static'
|
||
|
|
if (isClassMethod()) {
|
||
|
|
parseClassMethod(memberStart, /* isConstructor */ false);
|
||
|
|
return;
|
||
|
|
} else if (isClassProperty()) {
|
||
|
|
parseClassProperty();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
// otherwise something static
|
||
|
|
_base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType._static;
|
||
|
|
isStatic = true;
|
||
|
|
|
||
|
|
if (_tokenizer.match.call(void 0, _types.TokenType.braceL)) {
|
||
|
|
// This is a static block. Mark the word "static" with the class context ID for class element
|
||
|
|
// detection and parse as a regular block.
|
||
|
|
_base.state.tokens[_base.state.tokens.length - 1].contextId = classContextId;
|
||
|
|
parseBlock();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
parseClassMemberWithIsStatic(memberStart, isStatic, classContextId);
|
||
|
|
}
|
||
|
|
|
||
|
|
function parseClassMemberWithIsStatic(
|
||
|
|
memberStart,
|
||
|
|
isStatic,
|
||
|
|
classContextId,
|
||
|
|
) {
|
||
|
|
if (_base.isTypeScriptEnabled) {
|
||
|
|
if (_typescript.tsTryParseClassMemberWithIsStatic.call(void 0, isStatic)) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (_tokenizer.eat.call(void 0, _types.TokenType.star)) {
|
||
|
|
// a generator
|
||
|
|
parseClassPropertyName(classContextId);
|
||
|
|
parseClassMethod(memberStart, /* isConstructor */ false);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Get the identifier name so we can tell if it's actually a keyword like "async", "get", or
|
||
|
|
// "set".
|
||
|
|
parseClassPropertyName(classContextId);
|
||
|
|
let isConstructor = false;
|
||
|
|
const token = _base.state.tokens[_base.state.tokens.length - 1];
|
||
|
|
// We allow "constructor" as either an identifier or a string.
|
||
|
|
if (token.contextualKeyword === _keywords.ContextualKeyword._constructor) {
|
||
|
|
isConstructor = true;
|
||
|
|
}
|
||
|
|
parsePostMemberNameModifiers();
|
||
|
|
|
||
|
|
if (isClassMethod()) {
|
||
|
|
parseClassMethod(memberStart, isConstructor);
|
||
|
|
} else if (isClassProperty()) {
|
||
|
|
parseClassProperty();
|
||
|
|
} else if (token.contextualKeyword === _keywords.ContextualKeyword._async && !_util.isLineTerminator.call(void 0, )) {
|
||
|
|
_base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType._async;
|
||
|
|
// an async method
|
||
|
|
const isGenerator = _tokenizer.match.call(void 0, _types.TokenType.star);
|
||
|
|
if (isGenerator) {
|
||
|
|
_tokenizer.next.call(void 0, );
|
||
|
|
}
|
||
|
|
|
||
|
|
// The so-called parsed name would have been "async": get the real name.
|
||
|
|
parseClassPropertyName(classContextId);
|
||
|
|
parsePostMemberNameModifiers();
|
||
|
|
parseClassMethod(memberStart, false /* isConstructor */);
|
||
|
|
} else if (
|
||
|
|
(token.contextualKeyword === _keywords.ContextualKeyword._get ||
|
||
|
|
token.contextualKeyword === _keywords.ContextualKeyword._set) &&
|
||
|
|
!(_util.isLineTerminator.call(void 0, ) && _tokenizer.match.call(void 0, _types.TokenType.star))
|
||
|
|
) {
|
||
|
|
if (token.contextualKeyword === _keywords.ContextualKeyword._get) {
|
||
|
|
_base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType._get;
|
||
|
|
} else {
|
||
|
|
_base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType._set;
|
||
|
|
}
|
||
|
|
// `get\n*` is an uninitialized property named 'get' followed by a generator.
|
||
|
|
// a getter or setter
|
||
|
|
// The so-called parsed name would have been "get/set": get the real name.
|
||
|
|
parseClassPropertyName(classContextId);
|
||
|
|
parseClassMethod(memberStart, /* isConstructor */ false);
|
||
|
|
} else if (token.contextualKeyword === _keywords.ContextualKeyword._accessor && !_util.isLineTerminator.call(void 0, )) {
|
||
|
|
parseClassPropertyName(classContextId);
|
||
|
|
parseClassProperty();
|
||
|
|
} else if (_util.isLineTerminator.call(void 0, )) {
|
||
|
|
// an uninitialized class property (due to ASI, since we don't otherwise recognize the next token)
|
||
|
|
parseClassProperty();
|
||
|
|
} else {
|
||
|
|
_util.unexpected.call(void 0, );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function parseClassMethod(functionStart, isConstructor) {
|
||
|
|
if (_base.isTypeScriptEnabled) {
|
||
|
|
_typescript.tsTryParseTypeParameters.call(void 0, );
|
||
|
|
} else if (_base.isFlowEnabled) {
|
||
|
|
if (_tokenizer.match.call(void 0, _types.TokenType.lessThan)) {
|
||
|
|
_flow.flowParseTypeParameterDeclaration.call(void 0, );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
_expression.parseMethod.call(void 0, functionStart, isConstructor);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Return the name of the class property, if it is a simple identifier.
|
||
|
|
function parseClassPropertyName(classContextId) {
|
||
|
|
_expression.parsePropertyName.call(void 0, classContextId);
|
||
|
|
} exports.parseClassPropertyName = parseClassPropertyName;
|
||
|
|
|
||
|
|
function parsePostMemberNameModifiers() {
|
||
|
|
if (_base.isTypeScriptEnabled) {
|
||
|
|
const oldIsType = _tokenizer.pushTypeContext.call(void 0, 0);
|
||
|
|
_tokenizer.eat.call(void 0, _types.TokenType.question);
|
||
|
|
_tokenizer.popTypeContext.call(void 0, oldIsType);
|
||
|
|
}
|
||
|
|
} exports.parsePostMemberNameModifiers = parsePostMemberNameModifiers;
|
||
|
|
|
||
|
|
function parseClassProperty() {
|
||
|
|
if (_base.isTypeScriptEnabled) {
|
||
|
|
_tokenizer.eatTypeToken.call(void 0, _types.TokenType.bang);
|
||
|
|
_typescript.tsTryParseTypeAnnotation.call(void 0, );
|
||
|
|
} else if (_base.isFlowEnabled) {
|
||
|
|
if (_tokenizer.match.call(void 0, _types.TokenType.colon)) {
|
||
|
|
_flow.flowParseTypeAnnotation.call(void 0, );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (_tokenizer.match.call(void 0, _types.TokenType.eq)) {
|
||
|
|
const equalsTokenIndex = _base.state.tokens.length;
|
||
|
|
_tokenizer.next.call(void 0, );
|
||
|
|
_expression.parseMaybeAssign.call(void 0, );
|
||
|
|
_base.state.tokens[equalsTokenIndex].rhsEndIndex = _base.state.tokens.length;
|
||
|
|
}
|
||
|
|
_util.semicolon.call(void 0, );
|
||
|
|
} exports.parseClassProperty = parseClassProperty;
|
||
|
|
|
||
|
|
function parseClassId(isStatement, optionalId = false) {
|
||
|
|
if (
|
||
|
|
_base.isTypeScriptEnabled &&
|
||
|
|
(!isStatement || optionalId) &&
|
||
|
|
_util.isContextual.call(void 0, _keywords.ContextualKeyword._implements)
|
||
|
|
) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (_tokenizer.match.call(void 0, _types.TokenType.name)) {
|
||
|
|
_lval.parseBindingIdentifier.call(void 0, true);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (_base.isTypeScriptEnabled) {
|
||
|
|
_typescript.tsTryParseTypeParameters.call(void 0, );
|
||
|
|
} else if (_base.isFlowEnabled) {
|
||
|
|
if (_tokenizer.match.call(void 0, _types.TokenType.lessThan)) {
|
||
|
|
_flow.flowParseTypeParameterDeclaration.call(void 0, );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Returns true if there was a superclass.
|
||
|
|
function parseClassSuper() {
|
||
|
|
let hasSuper = false;
|
||
|
|
if (_tokenizer.eat.call(void 0, _types.TokenType._extends)) {
|
||
|
|
_expression.parseExprSubscripts.call(void 0, );
|
||
|
|
hasSuper = true;
|
||
|
|
} else {
|
||
|
|
hasSuper = false;
|
||
|
|
}
|
||
|
|
if (_base.isTypeScriptEnabled) {
|
||
|
|
_typescript.tsAfterParseClassSuper.call(void 0, hasSuper);
|
||
|
|
} else if (_base.isFlowEnabled) {
|
||
|
|
_flow.flowAfterParseClassSuper.call(void 0, hasSuper);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Parses module export declaration.
|
||
|
|
|
||
|
|
function parseExport() {
|
||
|
|
const exportIndex = _base.state.tokens.length - 1;
|
||
|
|
if (_base.isTypeScriptEnabled) {
|
||
|
|
if (_typescript.tsTryParseExport.call(void 0, )) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// export * from '...'
|
||
|
|
if (shouldParseExportStar()) {
|
||
|
|
parseExportStar();
|
||
|
|
} else if (isExportDefaultSpecifier()) {
|
||
|
|
// export default from
|
||
|
|
_expression.parseIdentifier.call(void 0, );
|
||
|
|
if (_tokenizer.match.call(void 0, _types.TokenType.comma) && _tokenizer.lookaheadType.call(void 0, ) === _types.TokenType.star) {
|
||
|
|
_util.expect.call(void 0, _types.TokenType.comma);
|
||
|
|
_util.expect.call(void 0, _types.TokenType.star);
|
||
|
|
_util.expectContextual.call(void 0, _keywords.ContextualKeyword._as);
|
||
|
|
_expression.parseIdentifier.call(void 0, );
|
||
|
|
} else {
|
||
|
|
parseExportSpecifiersMaybe();
|
||
|
|
}
|
||
|
|
parseExportFrom();
|
||
|
|
} else if (_tokenizer.eat.call(void 0, _types.TokenType._default)) {
|
||
|
|
// export default ...
|
||
|
|
parseExportDefaultExpression();
|
||
|
|
} else if (shouldParseExportDeclaration()) {
|
||
|
|
parseExportDeclaration();
|
||
|
|
} else {
|
||
|
|
// export { x, y as z } [from '...']
|
||
|
|
parseExportSpecifiers();
|
||
|
|
parseExportFrom();
|
||
|
|
}
|
||
|
|
_base.state.tokens[exportIndex].rhsEndIndex = _base.state.tokens.length;
|
||
|
|
} exports.parseExport = parseExport;
|
||
|
|
|
||
|
|
function parseExportDefaultExpression() {
|
||
|
|
if (_base.isTypeScriptEnabled) {
|
||
|
|
if (_typescript.tsTryParseExportDefaultExpression.call(void 0, )) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (_base.isFlowEnabled) {
|
||
|
|
if (_flow.flowTryParseExportDefaultExpression.call(void 0, )) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
const functionStart = _base.state.start;
|
||
|
|
if (_tokenizer.eat.call(void 0, _types.TokenType._function)) {
|
||
|
|
parseFunction(functionStart, true, true);
|
||
|
|
} else if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._async) && _tokenizer.lookaheadType.call(void 0, ) === _types.TokenType._function) {
|
||
|
|
// async function declaration
|
||
|
|
_util.eatContextual.call(void 0, _keywords.ContextualKeyword._async);
|
||
|
|
_tokenizer.eat.call(void 0, _types.TokenType._function);
|
||
|
|
parseFunction(functionStart, true, true);
|
||
|
|
} else if (_tokenizer.match.call(void 0, _types.TokenType._class)) {
|
||
|
|
parseClass(true, true);
|
||
|
|
} else if (_tokenizer.match.call(void 0, _types.TokenType.at)) {
|
||
|
|
parseDecorators();
|
||
|
|
parseClass(true, true);
|
||
|
|
} else {
|
||
|
|
_expression.parseMaybeAssign.call(void 0, );
|
||
|
|
_util.semicolon.call(void 0, );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function parseExportDeclaration() {
|
||
|
|
if (_base.isTypeScriptEnabled) {
|
||
|
|
_typescript.tsParseExportDeclaration.call(void 0, );
|
||
|
|
} else if (_base.isFlowEnabled) {
|
||
|
|
_flow.flowParseExportDeclaration.call(void 0, );
|
||
|
|
} else {
|
||
|
|
parseStatement(true);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function isExportDefaultSpecifier() {
|
||
|
|
if (_base.isTypeScriptEnabled && _typescript.tsIsDeclarationStart.call(void 0, )) {
|
||
|
|
return false;
|
||
|
|
} else if (_base.isFlowEnabled && _flow.flowShouldDisallowExportDefaultSpecifier.call(void 0, )) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
if (_tokenizer.match.call(void 0, _types.TokenType.name)) {
|
||
|
|
return _base.state.contextualKeyword !== _keywords.ContextualKeyword._async;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!_tokenizer.match.call(void 0, _types.TokenType._default)) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
const _next = _tokenizer.nextTokenStart.call(void 0, );
|
||
|
|
const lookahead = _tokenizer.lookaheadTypeAndKeyword.call(void 0, );
|
||
|
|
const hasFrom =
|
||
|
|
lookahead.type === _types.TokenType.name && lookahead.contextualKeyword === _keywords.ContextualKeyword._from;
|
||
|
|
if (lookahead.type === _types.TokenType.comma) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
// lookahead again when `export default from` is seen
|
||
|
|
if (hasFrom) {
|
||
|
|
const nextAfterFrom = _base.input.charCodeAt(_tokenizer.nextTokenStartSince.call(void 0, _next + 4));
|
||
|
|
return nextAfterFrom === _charcodes.charCodes.quotationMark || nextAfterFrom === _charcodes.charCodes.apostrophe;
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
function parseExportSpecifiersMaybe() {
|
||
|
|
if (_tokenizer.eat.call(void 0, _types.TokenType.comma)) {
|
||
|
|
parseExportSpecifiers();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function parseExportFrom() {
|
||
|
|
if (_util.eatContextual.call(void 0, _keywords.ContextualKeyword._from)) {
|
||
|
|
_expression.parseExprAtom.call(void 0, );
|
||
|
|
maybeParseImportAttributes();
|
||
|
|
}
|
||
|
|
_util.semicolon.call(void 0, );
|
||
|
|
} exports.parseExportFrom = parseExportFrom;
|
||
|
|
|
||
|
|
function shouldParseExportStar() {
|
||
|
|
if (_base.isFlowEnabled) {
|
||
|
|
return _flow.flowShouldParseExportStar.call(void 0, );
|
||
|
|
} else {
|
||
|
|
return _tokenizer.match.call(void 0, _types.TokenType.star);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function parseExportStar() {
|
||
|
|
if (_base.isFlowEnabled) {
|
||
|
|
_flow.flowParseExportStar.call(void 0, );
|
||
|
|
} else {
|
||
|
|
baseParseExportStar();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function baseParseExportStar() {
|
||
|
|
_util.expect.call(void 0, _types.TokenType.star);
|
||
|
|
|
||
|
|
if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._as)) {
|
||
|
|
parseExportNamespace();
|
||
|
|
} else {
|
||
|
|
parseExportFrom();
|
||
|
|
}
|
||
|
|
} exports.baseParseExportStar = baseParseExportStar;
|
||
|
|
|
||
|
|
function parseExportNamespace() {
|
||
|
|
_tokenizer.next.call(void 0, );
|
||
|
|
_base.state.tokens[_base.state.tokens.length - 1].type = _types.TokenType._as;
|
||
|
|
_expression.parseIdentifier.call(void 0, );
|
||
|
|
parseExportSpecifiersMaybe();
|
||
|
|
parseExportFrom();
|
||
|
|
}
|
||
|
|
|
||
|
|
function shouldParseExportDeclaration() {
|
||
|
|
return (
|
||
|
|
(_base.isTypeScriptEnabled && _typescript.tsIsDeclarationStart.call(void 0, )) ||
|
||
|
|
(_base.isFlowEnabled && _flow.flowShouldParseExportDeclaration.call(void 0, )) ||
|
||
|
|
_base.state.type === _types.TokenType._var ||
|
||
|
|
_base.state.type === _types.TokenType._const ||
|
||
|
|
_base.state.type === _types.TokenType._let ||
|
||
|
|
_base.state.type === _types.TokenType._function ||
|
||
|
|
_base.state.type === _types.TokenType._class ||
|
||
|
|
_util.isContextual.call(void 0, _keywords.ContextualKeyword._async) ||
|
||
|
|
_tokenizer.match.call(void 0, _types.TokenType.at)
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Parses a comma-separated list of module exports.
|
||
|
|
function parseExportSpecifiers() {
|
||
|
|
let first = true;
|
||
|
|
|
||
|
|
// export { x, y as z } [from '...']
|
||
|
|
_util.expect.call(void 0, _types.TokenType.braceL);
|
||
|
|
|
||
|
|
while (!_tokenizer.eat.call(void 0, _types.TokenType.braceR) && !_base.state.error) {
|
||
|
|
if (first) {
|
||
|
|
first = false;
|
||
|
|
} else {
|
||
|
|
_util.expect.call(void 0, _types.TokenType.comma);
|
||
|
|
if (_tokenizer.eat.call(void 0, _types.TokenType.braceR)) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
parseExportSpecifier();
|
||
|
|
}
|
||
|
|
} exports.parseExportSpecifiers = parseExportSpecifiers;
|
||
|
|
|
||
|
|
function parseExportSpecifier() {
|
||
|
|
if (_base.isTypeScriptEnabled) {
|
||
|
|
_typescript.tsParseExportSpecifier.call(void 0, );
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
_expression.parseIdentifier.call(void 0, );
|
||
|
|
_base.state.tokens[_base.state.tokens.length - 1].identifierRole = _tokenizer.IdentifierRole.ExportAccess;
|
||
|
|
if (_util.eatContextual.call(void 0, _keywords.ContextualKeyword._as)) {
|
||
|
|
_expression.parseIdentifier.call(void 0, );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Starting at the `module` token in an import, determine if it was truly an
|
||
|
|
* import reflection token or just looks like one.
|
||
|
|
*
|
||
|
|
* Returns true for:
|
||
|
|
* import module foo from "foo";
|
||
|
|
* import module from from "foo";
|
||
|
|
*
|
||
|
|
* Returns false for:
|
||
|
|
* import module from "foo";
|
||
|
|
* import module, {bar} from "foo";
|
||
|
|
*/
|
||
|
|
function isImportReflection() {
|
||
|
|
const snapshot = _base.state.snapshot();
|
||
|
|
_util.expectContextual.call(void 0, _keywords.ContextualKeyword._module);
|
||
|
|
if (_util.eatContextual.call(void 0, _keywords.ContextualKeyword._from)) {
|
||
|
|
if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._from)) {
|
||
|
|
_base.state.restoreFromSnapshot(snapshot);
|
||
|
|
return true;
|
||
|
|
} else {
|
||
|
|
_base.state.restoreFromSnapshot(snapshot);
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
} else if (_tokenizer.match.call(void 0, _types.TokenType.comma)) {
|
||
|
|
_base.state.restoreFromSnapshot(snapshot);
|
||
|
|
return false;
|
||
|
|
} else {
|
||
|
|
_base.state.restoreFromSnapshot(snapshot);
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Eat the "module" token from the import reflection proposal.
|
||
|
|
* https://github.com/tc39/proposal-import-reflection
|
||
|
|
*/
|
||
|
|
function parseMaybeImportReflection() {
|
||
|
|
// isImportReflection does snapshot/restore, so only run it if we see the word
|
||
|
|
// "module".
|
||
|
|
if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._module) && isImportReflection()) {
|
||
|
|
_tokenizer.next.call(void 0, );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Parses import declaration.
|
||
|
|
|
||
|
|
function parseImport() {
|
||
|
|
if (_base.isTypeScriptEnabled && _tokenizer.match.call(void 0, _types.TokenType.name) && _tokenizer.lookaheadType.call(void 0, ) === _types.TokenType.eq) {
|
||
|
|
_typescript.tsParseImportEqualsDeclaration.call(void 0, );
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (_base.isTypeScriptEnabled && _util.isContextual.call(void 0, _keywords.ContextualKeyword._type)) {
|
||
|
|
const lookahead = _tokenizer.lookaheadTypeAndKeyword.call(void 0, );
|
||
|
|
if (lookahead.type === _types.TokenType.name && lookahead.contextualKeyword !== _keywords.ContextualKeyword._from) {
|
||
|
|
// One of these `import type` cases:
|
||
|
|
// import type T = require('T');
|
||
|
|
// import type A from 'A';
|
||
|
|
_util.expectContextual.call(void 0, _keywords.ContextualKeyword._type);
|
||
|
|
if (_tokenizer.lookaheadType.call(void 0, ) === _types.TokenType.eq) {
|
||
|
|
_typescript.tsParseImportEqualsDeclaration.call(void 0, );
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
// If this is an `import type...from` statement, then we already ate the
|
||
|
|
// type token, so proceed to the regular import parser.
|
||
|
|
} else if (lookahead.type === _types.TokenType.star || lookahead.type === _types.TokenType.braceL) {
|
||
|
|
// One of these `import type` cases, in which case we can eat the type token
|
||
|
|
// and proceed as normal:
|
||
|
|
// import type * as A from 'A';
|
||
|
|
// import type {a} from 'A';
|
||
|
|
_util.expectContextual.call(void 0, _keywords.ContextualKeyword._type);
|
||
|
|
}
|
||
|
|
// Otherwise, we are importing the name "type".
|
||
|
|
}
|
||
|
|
|
||
|
|
// import '...'
|
||
|
|
if (_tokenizer.match.call(void 0, _types.TokenType.string)) {
|
||
|
|
_expression.parseExprAtom.call(void 0, );
|
||
|
|
} else {
|
||
|
|
parseMaybeImportReflection();
|
||
|
|
parseImportSpecifiers();
|
||
|
|
_util.expectContextual.call(void 0, _keywords.ContextualKeyword._from);
|
||
|
|
_expression.parseExprAtom.call(void 0, );
|
||
|
|
}
|
||
|
|
maybeParseImportAttributes();
|
||
|
|
_util.semicolon.call(void 0, );
|
||
|
|
} exports.parseImport = parseImport;
|
||
|
|
|
||
|
|
// eslint-disable-next-line no-unused-vars
|
||
|
|
function shouldParseDefaultImport() {
|
||
|
|
return _tokenizer.match.call(void 0, _types.TokenType.name);
|
||
|
|
}
|
||
|
|
|
||
|
|
function parseImportSpecifierLocal() {
|
||
|
|
_lval.parseImportedIdentifier.call(void 0, );
|
||
|
|
}
|
||
|
|
|
||
|
|
// Parses a comma-separated list of module imports.
|
||
|
|
function parseImportSpecifiers() {
|
||
|
|
if (_base.isFlowEnabled) {
|
||
|
|
_flow.flowStartParseImportSpecifiers.call(void 0, );
|
||
|
|
}
|
||
|
|
|
||
|
|
let first = true;
|
||
|
|
if (shouldParseDefaultImport()) {
|
||
|
|
// import defaultObj, { x, y as z } from '...'
|
||
|
|
parseImportSpecifierLocal();
|
||
|
|
|
||
|
|
if (!_tokenizer.eat.call(void 0, _types.TokenType.comma)) return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (_tokenizer.match.call(void 0, _types.TokenType.star)) {
|
||
|
|
_tokenizer.next.call(void 0, );
|
||
|
|
_util.expectContextual.call(void 0, _keywords.ContextualKeyword._as);
|
||
|
|
|
||
|
|
parseImportSpecifierLocal();
|
||
|
|
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
_util.expect.call(void 0, _types.TokenType.braceL);
|
||
|
|
while (!_tokenizer.eat.call(void 0, _types.TokenType.braceR) && !_base.state.error) {
|
||
|
|
if (first) {
|
||
|
|
first = false;
|
||
|
|
} else {
|
||
|
|
// Detect an attempt to deep destructure
|
||
|
|
if (_tokenizer.eat.call(void 0, _types.TokenType.colon)) {
|
||
|
|
_util.unexpected.call(void 0,
|
||
|
|
"ES2015 named imports do not destructure. Use another statement for destructuring after the import.",
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
_util.expect.call(void 0, _types.TokenType.comma);
|
||
|
|
if (_tokenizer.eat.call(void 0, _types.TokenType.braceR)) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
parseImportSpecifier();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function parseImportSpecifier() {
|
||
|
|
if (_base.isTypeScriptEnabled) {
|
||
|
|
_typescript.tsParseImportSpecifier.call(void 0, );
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (_base.isFlowEnabled) {
|
||
|
|
_flow.flowParseImportSpecifier.call(void 0, );
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
_lval.parseImportedIdentifier.call(void 0, );
|
||
|
|
if (_util.isContextual.call(void 0, _keywords.ContextualKeyword._as)) {
|
||
|
|
_base.state.tokens[_base.state.tokens.length - 1].identifierRole = _tokenizer.IdentifierRole.ImportAccess;
|
||
|
|
_tokenizer.next.call(void 0, );
|
||
|
|
_lval.parseImportedIdentifier.call(void 0, );
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Parse import attributes like `with {type: "json"}`, or the legacy form
|
||
|
|
* `assert {type: "json"}`.
|
||
|
|
*
|
||
|
|
* Import attributes technically have their own syntax, but are always parseable
|
||
|
|
* as a plain JS object, so just do that for simplicity.
|
||
|
|
*/
|
||
|
|
function maybeParseImportAttributes() {
|
||
|
|
if (_tokenizer.match.call(void 0, _types.TokenType._with) || (_util.isContextual.call(void 0, _keywords.ContextualKeyword._assert) && !_util.hasPrecedingLineBreak.call(void 0, ))) {
|
||
|
|
_tokenizer.next.call(void 0, );
|
||
|
|
_expression.parseObj.call(void 0, false, false);
|
||
|
|
}
|
||
|
|
}
|