@babel/parser
Version:
A JavaScript parser
1,418 lines (1,417 loc) • 62.7 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
var _types = require("../tokenizer/types");
var _lval = require("./lval");
var _identifier = require("../util/identifier");
var _location = require("../util/location");
var _scopeflags = require("../util/scopeflags");
var _util = require("./util");
var _productionParameter = require("../util/production-parameter");
var _expressionScope = require("../util/expression-scope");
var _parseError = require("../parse-error");
var _pipelineOperatorErrors = require("../parse-error/pipeline-operator-errors");
var _comments = require("./comments");
var _node = require("./node");
class ExpressionParser extends _lval.default {
checkProto(prop, isRecord, protoRef, refExpressionErrors) {
if (prop.type === "SpreadElement" || this.isObjectMethod(prop) || prop.computed || prop.shorthand) {
return;
}
const key = prop.key;
const name = key.type === "Identifier" ? key.name : key.value;
if (name === "__proto__") {
if (isRecord) {
this.raise(_parseError.Errors.RecordNoProto, {
at: key
});
return;
}
if (protoRef.used) {
if (refExpressionErrors) {
if (refExpressionErrors.doubleProtoLoc === null) {
refExpressionErrors.doubleProtoLoc = key.loc.start;
}
} else {
this.raise(_parseError.Errors.DuplicateProto, {
at: key
});
}
}
protoRef.used = true;
}
}
shouldExitDescending(expr, potentialArrowAt) {
return expr.type === "ArrowFunctionExpression" && expr.start === potentialArrowAt;
}
getExpression() {
this.enterInitialScopes();
this.nextToken();
const expr = this.parseExpression();
if (!this.match(137)) {
this.unexpected();
}
this.finalizeRemainingComments();
expr.comments = this.state.comments;
expr.errors = this.state.errors;
if (this.options.tokens) {
expr.tokens = this.tokens;
}
return expr;
}
parseExpression(disallowIn, refExpressionErrors) {
if (disallowIn) {
return this.disallowInAnd(() => this.parseExpressionBase(refExpressionErrors));
}
return this.allowInAnd(() => this.parseExpressionBase(refExpressionErrors));
}
parseExpressionBase(refExpressionErrors) {
const startLoc = this.state.startLoc;
const expr = this.parseMaybeAssign(refExpressionErrors);
if (this.match(12)) {
const node = this.startNodeAt(startLoc);
node.expressions = [expr];
while (this.eat(12)) {
node.expressions.push(this.parseMaybeAssign(refExpressionErrors));
}
this.toReferencedList(node.expressions);
return this.finishNode(node, "SequenceExpression");
}
return expr;
}
parseMaybeAssignDisallowIn(refExpressionErrors, afterLeftParse) {
return this.disallowInAnd(() => this.parseMaybeAssign(refExpressionErrors, afterLeftParse));
}
parseMaybeAssignAllowIn(refExpressionErrors, afterLeftParse) {
return this.allowInAnd(() => this.parseMaybeAssign(refExpressionErrors, afterLeftParse));
}
setOptionalParametersError(refExpressionErrors, resultError) {
var _resultError$loc;
refExpressionErrors.optionalParametersLoc = (_resultError$loc = resultError == null ? void 0 : resultError.loc) != null ? _resultError$loc : this.state.startLoc;
}
parseMaybeAssign(refExpressionErrors, afterLeftParse) {
const startLoc = this.state.startLoc;
if (this.isContextual(106)) {
if (this.prodParam.hasYield) {
let left = this.parseYield();
if (afterLeftParse) {
left = afterLeftParse.call(this, left, startLoc);
}
return left;
}
}
let ownExpressionErrors;
if (refExpressionErrors) {
ownExpressionErrors = false;
} else {
refExpressionErrors = new _util.ExpressionErrors();
ownExpressionErrors = true;
}
const {
type
} = this.state;
if (type === 10 || (0, _types.tokenIsIdentifier)(type)) {
this.state.potentialArrowAt = this.state.start;
}
let left = this.parseMaybeConditional(refExpressionErrors);
if (afterLeftParse) {
left = afterLeftParse.call(this, left, startLoc);
}
if ((0, _types.tokenIsAssignment)(this.state.type)) {
const node = this.startNodeAt(startLoc);
const operator = this.state.value;
node.operator = operator;
if (this.match(29)) {
this.toAssignable(left, true);
node.left = left;
const startIndex = startLoc.index;
if (refExpressionErrors.doubleProtoLoc != null && refExpressionErrors.doubleProtoLoc.index >= startIndex) {
refExpressionErrors.doubleProtoLoc = null;
}
if (refExpressionErrors.shorthandAssignLoc != null && refExpressionErrors.shorthandAssignLoc.index >= startIndex) {
refExpressionErrors.shorthandAssignLoc = null;
}
if (refExpressionErrors.privateKeyLoc != null && refExpressionErrors.privateKeyLoc.index >= startIndex) {
this.checkDestructuringPrivate(refExpressionErrors);
refExpressionErrors.privateKeyLoc = null;
}
} else {
node.left = left;
}
this.next();
node.right = this.parseMaybeAssign();
this.checkLVal(left, {
in: this.finishNode(node, "AssignmentExpression")
});
return node;
} else if (ownExpressionErrors) {
this.checkExpressionErrors(refExpressionErrors, true);
}
return left;
}
parseMaybeConditional(refExpressionErrors) {
const startLoc = this.state.startLoc;
const potentialArrowAt = this.state.potentialArrowAt;
const expr = this.parseExprOps(refExpressionErrors);
if (this.shouldExitDescending(expr, potentialArrowAt)) {
return expr;
}
return this.parseConditional(expr, startLoc, refExpressionErrors);
}
parseConditional(expr, startLoc, refExpressionErrors) {
if (this.eat(17)) {
const node = this.startNodeAt(startLoc);
node.test = expr;
node.consequent = this.parseMaybeAssignAllowIn();
this.expect(14);
node.alternate = this.parseMaybeAssign();
return this.finishNode(node, "ConditionalExpression");
}
return expr;
}
parseMaybeUnaryOrPrivate(refExpressionErrors) {
return this.match(136) ? this.parsePrivateName() : this.parseMaybeUnary(refExpressionErrors);
}
parseExprOps(refExpressionErrors) {
const startLoc = this.state.startLoc;
const potentialArrowAt = this.state.potentialArrowAt;
const expr = this.parseMaybeUnaryOrPrivate(refExpressionErrors);
if (this.shouldExitDescending(expr, potentialArrowAt)) {
return expr;
}
return this.parseExprOp(expr, startLoc, -1);
}
parseExprOp(left, leftStartLoc, minPrec) {
if (this.isPrivateName(left)) {
const value = this.getPrivateNameSV(left);
if (minPrec >= (0, _types.tokenOperatorPrecedence)(58) || !this.prodParam.hasIn || !this.match(58)) {
this.raise(_parseError.Errors.PrivateInExpectedIn, {
at: left,
identifierName: value
});
}
this.classScope.usePrivateName(value, left.loc.start);
}
const op = this.state.type;
if ((0, _types.tokenIsOperator)(op) && (this.prodParam.hasIn || !this.match(58))) {
let prec = (0, _types.tokenOperatorPrecedence)(op);
if (prec > minPrec) {
if (op === 39) {
this.expectPlugin("pipelineOperator");
if (this.state.inFSharpPipelineDirectBody) {
return left;
}
this.checkPipelineAtInfixOperator(left, leftStartLoc);
}
const node = this.startNodeAt(leftStartLoc);
node.left = left;
node.operator = this.state.value;
const logical = op === 41 || op === 42;
const coalesce = op === 40;
if (coalesce) {
prec = (0, _types.tokenOperatorPrecedence)(42);
}
this.next();
if (op === 39 && this.hasPlugin(["pipelineOperator", {
proposal: "minimal"
}])) {
if (this.state.type === 96 && this.prodParam.hasAwait) {
throw this.raise(_parseError.Errors.UnexpectedAwaitAfterPipelineBody, {
at: this.state.startLoc
});
}
}
node.right = this.parseExprOpRightExpr(op, prec);
const finishedNode = this.finishNode(node, logical || coalesce ? "LogicalExpression" : "BinaryExpression");
const nextOp = this.state.type;
if (coalesce && (nextOp === 41 || nextOp === 42) || logical && nextOp === 40) {
throw this.raise(_parseError.Errors.MixingCoalesceWithLogical, {
at: this.state.startLoc
});
}
return this.parseExprOp(finishedNode, leftStartLoc, minPrec);
}
}
return left;
}
parseExprOpRightExpr(op, prec) {
const startLoc = this.state.startLoc;
switch (op) {
case 39:
switch (this.getPluginOption("pipelineOperator", "proposal")) {
case "hack":
return this.withTopicBindingContext(() => {
return this.parseHackPipeBody();
});
case "smart":
return this.withTopicBindingContext(() => {
if (this.prodParam.hasYield && this.isContextual(106)) {
throw this.raise(_parseError.Errors.PipeBodyIsTighter, {
at: this.state.startLoc
});
}
return this.parseSmartPipelineBodyInStyle(this.parseExprOpBaseRightExpr(op, prec), startLoc);
});
case "fsharp":
return this.withSoloAwaitPermittingContext(() => {
return this.parseFSharpPipelineBody(prec);
});
}
default:
return this.parseExprOpBaseRightExpr(op, prec);
}
}
parseExprOpBaseRightExpr(op, prec) {
const startLoc = this.state.startLoc;
return this.parseExprOp(this.parseMaybeUnaryOrPrivate(), startLoc, (0, _types.tokenIsRightAssociative)(op) ? prec - 1 : prec);
}
parseHackPipeBody() {
var _body$extra;
const {
startLoc
} = this.state;
const body = this.parseMaybeAssign();
const requiredParentheses = _pipelineOperatorErrors.UnparenthesizedPipeBodyDescriptions.has(body.type);
if (requiredParentheses && !((_body$extra = body.extra) != null && _body$extra.parenthesized)) {
this.raise(_parseError.Errors.PipeUnparenthesizedBody, {
at: startLoc,
type: body.type
});
}
if (!this.topicReferenceWasUsedInCurrentContext()) {
this.raise(_parseError.Errors.PipeTopicUnused, {
at: startLoc
});
}
return body;
}
checkExponentialAfterUnary(node) {
if (this.match(57)) {
this.raise(_parseError.Errors.UnexpectedTokenUnaryExponentiation, {
at: node.argument
});
}
}
parseMaybeUnary(refExpressionErrors, sawUnary) {
const startLoc = this.state.startLoc;
const isAwait = this.isContextual(96);
if (isAwait && this.isAwaitAllowed()) {
this.next();
const expr = this.parseAwait(startLoc);
if (!sawUnary) this.checkExponentialAfterUnary(expr);
return expr;
}
const update = this.match(34);
const node = this.startNode();
if ((0, _types.tokenIsPrefix)(this.state.type)) {
node.operator = this.state.value;
node.prefix = true;
if (this.match(72)) {
this.expectPlugin("throwExpressions");
}
const isDelete = this.match(89);
this.next();
node.argument = this.parseMaybeUnary(null, true);
this.checkExpressionErrors(refExpressionErrors, true);
if (this.state.strict && isDelete) {
const arg = node.argument;
if (arg.type === "Identifier") {
this.raise(_parseError.Errors.StrictDelete, {
at: node
});
} else if (this.hasPropertyAsPrivateName(arg)) {
this.raise(_parseError.Errors.DeletePrivateField, {
at: node
});
}
}
if (!update) {
if (!sawUnary) {
this.checkExponentialAfterUnary(node);
}
return this.finishNode(node, "UnaryExpression");
}
}
const expr = this.parseUpdate(node, update, refExpressionErrors);
if (isAwait) {
const {
type
} = this.state;
const startsExpr = this.hasPlugin("v8intrinsic") ? (0, _types.tokenCanStartExpression)(type) : (0, _types.tokenCanStartExpression)(type) && !this.match(54);
if (startsExpr && !this.isAmbiguousAwait()) {
this.raiseOverwrite(_parseError.Errors.AwaitNotInAsyncContext, {
at: startLoc
});
return this.parseAwait(startLoc);
}
}
return expr;
}
parseUpdate(node, update, refExpressionErrors) {
if (update) {
const updateExpressionNode = node;
this.checkLVal(updateExpressionNode.argument, {
in: this.finishNode(updateExpressionNode, "UpdateExpression")
});
return node;
}
const startLoc = this.state.startLoc;
let expr = this.parseExprSubscripts(refExpressionErrors);
if (this.checkExpressionErrors(refExpressionErrors, false)) return expr;
while ((0, _types.tokenIsPostfix)(this.state.type) && !this.canInsertSemicolon()) {
const node = this.startNodeAt(startLoc);
node.operator = this.state.value;
node.prefix = false;
node.argument = expr;
this.next();
this.checkLVal(expr, {
in: expr = this.finishNode(node, "UpdateExpression")
});
}
return expr;
}
parseExprSubscripts(refExpressionErrors) {
const startLoc = this.state.startLoc;
const potentialArrowAt = this.state.potentialArrowAt;
const expr = this.parseExprAtom(refExpressionErrors);
if (this.shouldExitDescending(expr, potentialArrowAt)) {
return expr;
}
return this.parseSubscripts(expr, startLoc);
}
parseSubscripts(base, startLoc, noCalls) {
const state = {
optionalChainMember: false,
maybeAsyncArrow: this.atPossibleAsyncArrow(base),
stop: false
};
do {
base = this.parseSubscript(base, startLoc, noCalls, state);
state.maybeAsyncArrow = false;
} while (!state.stop);
return base;
}
parseSubscript(base, startLoc, noCalls, state) {
const {
type
} = this.state;
if (!noCalls && type === 15) {
return this.parseBind(base, startLoc, noCalls, state);
} else if ((0, _types.tokenIsTemplate)(type)) {
return this.parseTaggedTemplateExpression(base, startLoc, state);
}
let optional = false;
if (type === 18) {
if (noCalls) {
this.raise(_parseError.Errors.OptionalChainingNoNew, {
at: this.state.startLoc
});
if (this.lookaheadCharCode() === 40) {
state.stop = true;
return base;
}
}
state.optionalChainMember = optional = true;
this.next();
}
if (!noCalls && this.match(10)) {
return this.parseCoverCallAndAsyncArrowHead(base, startLoc, state, optional);
} else {
const computed = this.eat(0);
if (computed || optional || this.eat(16)) {
return this.parseMember(base, startLoc, state, computed, optional);
} else {
state.stop = true;
return base;
}
}
}
parseMember(base, startLoc, state, computed, optional) {
const node = this.startNodeAt(startLoc);
node.object = base;
node.computed = computed;
if (computed) {
node.property = this.parseExpression();
this.expect(3);
} else if (this.match(136)) {
if (base.type === "Super") {
this.raise(_parseError.Errors.SuperPrivateField, {
at: startLoc
});
}
this.classScope.usePrivateName(this.state.value, this.state.startLoc);
node.property = this.parsePrivateName();
} else {
node.property = this.parseIdentifier(true);
}
if (state.optionalChainMember) {
node.optional = optional;
return this.finishNode(node, "OptionalMemberExpression");
} else {
return this.finishNode(node, "MemberExpression");
}
}
parseBind(base, startLoc, noCalls, state) {
const node = this.startNodeAt(startLoc);
node.object = base;
this.next();
node.callee = this.parseNoCallExpr();
state.stop = true;
return this.parseSubscripts(this.finishNode(node, "BindExpression"), startLoc, noCalls);
}
parseCoverCallAndAsyncArrowHead(base, startLoc, state, optional) {
const oldMaybeInArrowParameters = this.state.maybeInArrowParameters;
let refExpressionErrors = null;
this.state.maybeInArrowParameters = true;
this.next();
const node = this.startNodeAt(startLoc);
node.callee = base;
const {
maybeAsyncArrow,
optionalChainMember
} = state;
if (maybeAsyncArrow) {
this.expressionScope.enter((0, _expressionScope.newAsyncArrowScope)());
refExpressionErrors = new _util.ExpressionErrors();
}
if (optionalChainMember) {
node.optional = optional;
}
if (optional) {
node.arguments = this.parseCallExpressionArguments(11);
} else {
node.arguments = this.parseCallExpressionArguments(11, base.type === "Import", base.type !== "Super", node, refExpressionErrors);
}
let finishedNode = this.finishCallExpression(node, optionalChainMember);
if (maybeAsyncArrow && this.shouldParseAsyncArrow() && !optional) {
state.stop = true;
this.checkDestructuringPrivate(refExpressionErrors);
this.expressionScope.validateAsPattern();
this.expressionScope.exit();
finishedNode = this.parseAsyncArrowFromCallExpression(this.startNodeAt(startLoc), finishedNode);
} else {
if (maybeAsyncArrow) {
this.checkExpressionErrors(refExpressionErrors, true);
this.expressionScope.exit();
}
this.toReferencedArguments(finishedNode);
}
this.state.maybeInArrowParameters = oldMaybeInArrowParameters;
return finishedNode;
}
toReferencedArguments(node, isParenthesizedExpr) {
this.toReferencedListDeep(node.arguments, isParenthesizedExpr);
}
parseTaggedTemplateExpression(base, startLoc, state) {
const node = this.startNodeAt(startLoc);
node.tag = base;
node.quasi = this.parseTemplate(true);
if (state.optionalChainMember) {
this.raise(_parseError.Errors.OptionalChainingNoTemplate, {
at: startLoc
});
}
return this.finishNode(node, "TaggedTemplateExpression");
}
atPossibleAsyncArrow(base) {
return base.type === "Identifier" && base.name === "async" && this.state.lastTokEndLoc.index === base.end && !this.canInsertSemicolon() && base.end - base.start === 5 && base.start === this.state.potentialArrowAt;
}
expectImportAttributesPlugin() {
if (!this.hasPlugin("importAssertions")) {
this.expectPlugin("importAttributes");
}
}
finishCallExpression(node, optional) {
if (node.callee.type === "Import") {
if (node.arguments.length === 2) {
{
if (!this.hasPlugin("moduleAttributes")) {
this.expectImportAttributesPlugin();
}
}
}
if (node.arguments.length === 0 || node.arguments.length > 2) {
this.raise(_parseError.Errors.ImportCallArity, {
at: node,
maxArgumentCount: this.hasPlugin("importAttributes") || this.hasPlugin("importAssertions") || this.hasPlugin("moduleAttributes") ? 2 : 1
});
} else {
for (const arg of node.arguments) {
if (arg.type === "SpreadElement") {
this.raise(_parseError.Errors.ImportCallSpreadArgument, {
at: arg
});
}
}
}
}
return this.finishNode(node, optional ? "OptionalCallExpression" : "CallExpression");
}
parseCallExpressionArguments(close, dynamicImport, allowPlaceholder, nodeForExtra, refExpressionErrors) {
const elts = [];
let first = true;
const oldInFSharpPipelineDirectBody = this.state.inFSharpPipelineDirectBody;
this.state.inFSharpPipelineDirectBody = false;
while (!this.eat(close)) {
if (first) {
first = false;
} else {
this.expect(12);
if (this.match(close)) {
if (dynamicImport && !this.hasPlugin("importAttributes") && !this.hasPlugin("importAssertions") && !this.hasPlugin("moduleAttributes")) {
this.raise(_parseError.Errors.ImportCallArgumentTrailingComma, {
at: this.state.lastTokStartLoc
});
}
if (nodeForExtra) {
this.addTrailingCommaExtraToNode(nodeForExtra);
}
this.next();
break;
}
}
elts.push(this.parseExprListItem(false, refExpressionErrors, allowPlaceholder));
}
this.state.inFSharpPipelineDirectBody = oldInFSharpPipelineDirectBody;
return elts;
}
shouldParseAsyncArrow() {
return this.match(19) && !this.canInsertSemicolon();
}
parseAsyncArrowFromCallExpression(node, call) {
var _call$extra;
this.resetPreviousNodeTrailingComments(call);
this.expect(19);
this.parseArrowExpression(node, call.arguments, true, (_call$extra = call.extra) == null ? void 0 : _call$extra.trailingCommaLoc);
if (call.innerComments) {
(0, _comments.setInnerComments)(node, call.innerComments);
}
if (call.callee.trailingComments) {
(0, _comments.setInnerComments)(node, call.callee.trailingComments);
}
return node;
}
parseNoCallExpr() {
const startLoc = this.state.startLoc;
return this.parseSubscripts(this.parseExprAtom(), startLoc, true);
}
parseExprAtom(refExpressionErrors) {
let node;
let decorators = null;
const {
type
} = this.state;
switch (type) {
case 79:
return this.parseSuper();
case 83:
node = this.startNode();
this.next();
if (this.match(16)) {
return this.parseImportMetaProperty(node);
}
if (!this.match(10)) {
this.raise(_parseError.Errors.UnsupportedImport, {
at: this.state.lastTokStartLoc
});
}
return this.finishNode(node, "Import");
case 78:
node = this.startNode();
this.next();
return this.finishNode(node, "ThisExpression");
case 90:
{
return this.parseDo(this.startNode(), false);
}
case 56:
case 31:
{
this.readRegexp();
return this.parseRegExpLiteral(this.state.value);
}
case 132:
return this.parseNumericLiteral(this.state.value);
case 133:
return this.parseBigIntLiteral(this.state.value);
case 134:
return this.parseDecimalLiteral(this.state.value);
case 131:
return this.parseStringLiteral(this.state.value);
case 84:
return this.parseNullLiteral();
case 85:
return this.parseBooleanLiteral(true);
case 86:
return this.parseBooleanLiteral(false);
case 10:
{
const canBeArrow = this.state.potentialArrowAt === this.state.start;
return this.parseParenAndDistinguishExpression(canBeArrow);
}
case 2:
case 1:
{
return this.parseArrayLike(this.state.type === 2 ? 4 : 3, false, true);
}
case 0:
{
return this.parseArrayLike(3, true, false, refExpressionErrors);
}
case 6:
case 7:
{
return this.parseObjectLike(this.state.type === 6 ? 9 : 8, false, true);
}
case 5:
{
return this.parseObjectLike(8, false, false, refExpressionErrors);
}
case 68:
return this.parseFunctionOrFunctionSent();
case 26:
decorators = this.parseDecorators();
case 80:
return this.parseClass(this.maybeTakeDecorators(decorators, this.startNode()), false);
case 77:
return this.parseNewOrNewTarget();
case 25:
case 24:
return this.parseTemplate(false);
case 15:
{
node = this.startNode();
this.next();
node.object = null;
const callee = node.callee = this.parseNoCallExpr();
if (callee.type === "MemberExpression") {
return this.finishNode(node, "BindExpression");
} else {
throw this.raise(_parseError.Errors.UnsupportedBind, {
at: callee
});
}
}
case 136:
{
this.raise(_parseError.Errors.PrivateInExpectedIn, {
at: this.state.startLoc,
identifierName: this.state.value
});
return this.parsePrivateName();
}
case 33:
{
return this.parseTopicReferenceThenEqualsSign(54, "%");
}
case 32:
{
return this.parseTopicReferenceThenEqualsSign(44, "^");
}
case 37:
case 38:
{
return this.parseTopicReference("hack");
}
case 44:
case 54:
case 27:
{
const pipeProposal = this.getPluginOption("pipelineOperator", "proposal");
if (pipeProposal) {
return this.parseTopicReference(pipeProposal);
}
this.unexpected();
break;
}
case 47:
{
const lookaheadCh = this.input.codePointAt(this.nextTokenStart());
if ((0, _identifier.isIdentifierStart)(lookaheadCh) || lookaheadCh === 62) {
this.expectOnePlugin(["jsx", "flow", "typescript"]);
} else {
this.unexpected();
}
break;
}
default:
if ((0, _types.tokenIsIdentifier)(type)) {
if (this.isContextual(125) && this.lookaheadInLineCharCode() === 123) {
return this.parseModuleExpression();
}
const canBeArrow = this.state.potentialArrowAt === this.state.start;
const containsEsc = this.state.containsEsc;
const id = this.parseIdentifier();
if (!containsEsc && id.name === "async" && !this.canInsertSemicolon()) {
const {
type
} = this.state;
if (type === 68) {
this.resetPreviousNodeTrailingComments(id);
this.next();
return this.parseAsyncFunctionExpression(this.startNodeAtNode(id));
} else if ((0, _types.tokenIsIdentifier)(type)) {
if (this.lookaheadCharCode() === 61) {
return this.parseAsyncArrowUnaryFunction(this.startNodeAtNode(id));
} else {
return id;
}
} else if (type === 90) {
this.resetPreviousNodeTrailingComments(id);
return this.parseDo(this.startNodeAtNode(id), true);
}
}
if (canBeArrow && this.match(19) && !this.canInsertSemicolon()) {
this.next();
return this.parseArrowExpression(this.startNodeAtNode(id), [id], false);
}
return id;
} else {
this.unexpected();
}
}
}
parseTopicReferenceThenEqualsSign(topicTokenType, topicTokenValue) {
const pipeProposal = this.getPluginOption("pipelineOperator", "proposal");
if (pipeProposal) {
this.state.type = topicTokenType;
this.state.value = topicTokenValue;
this.state.pos--;
this.state.end--;
this.state.endLoc = (0, _location.createPositionWithColumnOffset)(this.state.endLoc, -1);
return this.parseTopicReference(pipeProposal);
} else {
this.unexpected();
}
}
parseTopicReference(pipeProposal) {
const node = this.startNode();
const startLoc = this.state.startLoc;
const tokenType = this.state.type;
this.next();
return this.finishTopicReference(node, startLoc, pipeProposal, tokenType);
}
finishTopicReference(node, startLoc, pipeProposal, tokenType) {
if (this.testTopicReferenceConfiguration(pipeProposal, startLoc, tokenType)) {
const nodeType = pipeProposal === "smart" ? "PipelinePrimaryTopicReference" : "TopicReference";
if (!this.topicReferenceIsAllowedInCurrentContext()) {
this.raise(pipeProposal === "smart" ? _parseError.Errors.PrimaryTopicNotAllowed : _parseError.Errors.PipeTopicUnbound, {
at: startLoc
});
}
this.registerTopicReference();
return this.finishNode(node, nodeType);
} else {
throw this.raise(_parseError.Errors.PipeTopicUnconfiguredToken, {
at: startLoc,
token: (0, _types.tokenLabelName)(tokenType)
});
}
}
testTopicReferenceConfiguration(pipeProposal, startLoc, tokenType) {
switch (pipeProposal) {
case "hack":
{
return this.hasPlugin(["pipelineOperator", {
topicToken: (0, _types.tokenLabelName)(tokenType)
}]);
}
case "smart":
return tokenType === 27;
default:
throw this.raise(_parseError.Errors.PipeTopicRequiresHackPipes, {
at: startLoc
});
}
}
parseAsyncArrowUnaryFunction(node) {
this.prodParam.enter((0, _productionParameter.functionFlags)(true, this.prodParam.hasYield));
const params = [this.parseIdentifier()];
this.prodParam.exit();
if (this.hasPrecedingLineBreak()) {
this.raise(_parseError.Errors.LineTerminatorBeforeArrow, {
at: this.state.curPosition()
});
}
this.expect(19);
return this.parseArrowExpression(node, params, true);
}
parseDo(node, isAsync) {
this.expectPlugin("doExpressions");
if (isAsync) {
this.expectPlugin("asyncDoExpressions");
}
node.async = isAsync;
this.next();
const oldLabels = this.state.labels;
this.state.labels = [];
if (isAsync) {
this.prodParam.enter(_productionParameter.PARAM_AWAIT);
node.body = this.parseBlock();
this.prodParam.exit();
} else {
node.body = this.parseBlock();
}
this.state.labels = oldLabels;
return this.finishNode(node, "DoExpression");
}
parseSuper() {
const node = this.startNode();
this.next();
if (this.match(10) && !this.scope.allowDirectSuper && !this.options.allowSuperOutsideMethod) {
this.raise(_parseError.Errors.SuperNotAllowed, {
at: node
});
} else if (!this.scope.allowSuper && !this.options.allowSuperOutsideMethod) {
this.raise(_parseError.Errors.UnexpectedSuper, {
at: node
});
}
if (!this.match(10) && !this.match(0) && !this.match(16)) {
this.raise(_parseError.Errors.UnsupportedSuper, {
at: node
});
}
return this.finishNode(node, "Super");
}
parsePrivateName() {
const node = this.startNode();
const id = this.startNodeAt((0, _location.createPositionWithColumnOffset)(this.state.startLoc, 1));
const name = this.state.value;
this.next();
node.id = this.createIdentifier(id, name);
return this.finishNode(node, "PrivateName");
}
parseFunctionOrFunctionSent() {
const node = this.startNode();
this.next();
if (this.prodParam.hasYield && this.match(16)) {
const meta = this.createIdentifier(this.startNodeAtNode(node), "function");
this.next();
if (this.match(102)) {
this.expectPlugin("functionSent");
} else if (!this.hasPlugin("functionSent")) {
this.unexpected();
}
return this.parseMetaProperty(node, meta, "sent");
}
return this.parseFunction(node);
}
parseMetaProperty(node, meta, propertyName) {
node.meta = meta;
const containsEsc = this.state.containsEsc;
node.property = this.parseIdentifier(true);
if (node.property.name !== propertyName || containsEsc) {
this.raise(_parseError.Errors.UnsupportedMetaProperty, {
at: node.property,
target: meta.name,
onlyValidPropertyName: propertyName
});
}
return this.finishNode(node, "MetaProperty");
}
parseImportMetaProperty(node) {
const id = this.createIdentifier(this.startNodeAtNode(node), "import");
this.next();
if (this.isContextual(100)) {
if (!this.inModule) {
this.raise(_parseError.Errors.ImportMetaOutsideModule, {
at: id
});
}
this.sawUnambiguousESM = true;
}
return this.parseMetaProperty(node, id, "meta");
}
parseLiteralAtNode(value, type, node) {
this.addExtra(node, "rawValue", value);
this.addExtra(node, "raw", this.input.slice(node.start, this.state.end));
node.value = value;
this.next();
return this.finishNode(node, type);
}
parseLiteral(value, type) {
const node = this.startNode();
return this.parseLiteralAtNode(value, type, node);
}
parseStringLiteral(value) {
return this.parseLiteral(value, "StringLiteral");
}
parseNumericLiteral(value) {
return this.parseLiteral(value, "NumericLiteral");
}
parseBigIntLiteral(value) {
return this.parseLiteral(value, "BigIntLiteral");
}
parseDecimalLiteral(value) {
return this.parseLiteral(value, "DecimalLiteral");
}
parseRegExpLiteral(value) {
const node = this.parseLiteral(value.value, "RegExpLiteral");
node.pattern = value.pattern;
node.flags = value.flags;
return node;
}
parseBooleanLiteral(value) {
const node = this.startNode();
node.value = value;
this.next();
return this.finishNode(node, "BooleanLiteral");
}
parseNullLiteral() {
const node = this.startNode();
this.next();
return this.finishNode(node, "NullLiteral");
}
parseParenAndDistinguishExpression(canBeArrow) {
const startLoc = this.state.startLoc;
let val;
this.next();
this.expressionScope.enter((0, _expressionScope.newArrowHeadScope)());
const oldMaybeInArrowParameters = this.state.maybeInArrowParameters;
const oldInFSharpPipelineDirectBody = this.state.inFSharpPipelineDirectBody;
this.state.maybeInArrowParameters = true;
this.state.inFSharpPipelineDirectBody = false;
const innerStartLoc = this.state.startLoc;
const exprList = [];
const refExpressionErrors = new _util.ExpressionErrors();
let first = true;
let spreadStartLoc;
let optionalCommaStartLoc;
while (!this.match(11)) {
if (first) {
first = false;
} else {
this.expect(12, refExpressionErrors.optionalParametersLoc === null ? null : refExpressionErrors.optionalParametersLoc);
if (this.match(11)) {
optionalCommaStartLoc = this.state.startLoc;
break;
}
}
if (this.match(21)) {
const spreadNodeStartLoc = this.state.startLoc;
spreadStartLoc = this.state.startLoc;
exprList.push(this.parseParenItem(this.parseRestBinding(), spreadNodeStartLoc));
if (!this.checkCommaAfterRest(41)) {
break;
}
} else {
exprList.push(this.parseMaybeAssignAllowIn(refExpressionErrors, this.parseParenItem));
}
}
const innerEndLoc = this.state.lastTokEndLoc;
this.expect(11);
this.state.maybeInArrowParameters = oldMaybeInArrowParameters;
this.state.inFSharpPipelineDirectBody = oldInFSharpPipelineDirectBody;
let arrowNode = this.startNodeAt(startLoc);
if (canBeArrow && this.shouldParseArrow(exprList) && (arrowNode = this.parseArrow(arrowNode))) {
this.checkDestructuringPrivate(refExpressionErrors);
this.expressionScope.validateAsPattern();
this.expressionScope.exit();
this.parseArrowExpression(arrowNode, exprList, false);
return arrowNode;
}
this.expressionScope.exit();
if (!exprList.length) {
this.unexpected(this.state.lastTokStartLoc);
}
if (optionalCommaStartLoc) this.unexpected(optionalCommaStartLoc);
if (spreadStartLoc) this.unexpected(spreadStartLoc);
this.checkExpressionErrors(refExpressionErrors, true);
this.toReferencedListDeep(exprList, true);
if (exprList.length > 1) {
val = this.startNodeAt(innerStartLoc);
val.expressions = exprList;
this.finishNode(val, "SequenceExpression");
this.resetEndLocation(val, innerEndLoc);
} else {
val = exprList[0];
}
return this.wrapParenthesis(startLoc, val);
}
wrapParenthesis(startLoc, expression) {
if (!this.options.createParenthesizedExpressions) {
this.addExtra(expression, "parenthesized", true);
this.addExtra(expression, "parenStart", startLoc.index);
this.takeSurroundingComments(expression, startLoc.index, this.state.lastTokEndLoc.index);
return expression;
}
const parenExpression = this.startNodeAt(startLoc);
parenExpression.expression = expression;
return this.finishNode(parenExpression, "ParenthesizedExpression");
}
shouldParseArrow(params) {
return !this.canInsertSemicolon();
}
parseArrow(node) {
if (this.eat(19)) {
return node;
}
}
parseParenItem(node, startLoc) {
return node;
}
parseNewOrNewTarget() {
const node = this.startNode();
this.next();
if (this.match(16)) {
const meta = this.createIdentifier(this.startNodeAtNode(node), "new");
this.next();
const metaProp = this.parseMetaProperty(node, meta, "target");
if (!this.scope.inNonArrowFunction && !this.scope.inClass && !this.options.allowNewTargetOutsideFunction) {
this.raise(_parseError.Errors.UnexpectedNewTarget, {
at: metaProp
});
}
return metaProp;
}
return this.parseNew(node);
}
parseNew(node) {
this.parseNewCallee(node);
if (this.eat(10)) {
const args = this.parseExprList(11);
this.toReferencedList(args);
node.arguments = args;
} else {
node.arguments = [];
}
return this.finishNode(node, "NewExpression");
}
parseNewCallee(node) {
node.callee = this.parseNoCallExpr();
if (node.callee.type === "Import") {
this.raise(_parseError.Errors.ImportCallNotNewExpression, {
at: node.callee
});
}
}
parseTemplateElement(isTagged) {
const {
start,
startLoc,
end,
value
} = this.state;
const elemStart = start + 1;
const elem = this.startNodeAt((0, _location.createPositionWithColumnOffset)(startLoc, 1));
if (value === null) {
if (!isTagged) {
this.raise(_parseError.Errors.InvalidEscapeSequenceTemplate, {
at: (0, _location.createPositionWithColumnOffset)(this.state.firstInvalidTemplateEscapePos, 1)
});
}
}
const isTail = this.match(24);
const endOffset = isTail ? -1 : -2;
const elemEnd = end + endOffset;
elem.value = {
raw: this.input.slice(elemStart, elemEnd).replace(/\r\n?/g, "\n"),
cooked: value === null ? null : value.slice(1, endOffset)
};
elem.tail = isTail;
this.next();
const finishedNode = this.finishNode(elem, "TemplateElement");
this.resetEndLocation(finishedNode, (0, _location.createPositionWithColumnOffset)(this.state.lastTokEndLoc, endOffset));
return finishedNode;
}
parseTemplate(isTagged) {
const node = this.startNode();
node.expressions = [];
let curElt = this.parseTemplateElement(isTagged);
node.quasis = [curElt];
while (!curElt.tail) {
node.expressions.push(this.parseTemplateSubstitution());
this.readTemplateContinuation();
node.quasis.push(curElt = this.parseTemplateElement(isTagged));
}
return this.finishNode(node, "TemplateLiteral");
}
parseTemplateSubstitution() {
return this.parseExpression();
}
parseObjectLike(close, isPattern, isRecord, refExpressionErrors) {
if (isRecord) {
this.expectPlugin("recordAndTuple");
}
const oldInFSharpPipelineDirectBody = this.state.inFSharpPipelineDirectBody;
this.state.inFSharpPipelineDirectBody = false;
const propHash = Object.create(null);
let first = true;
const node = this.startNode();
node.properties = [];
this.next();
while (!this.match(close)) {
if (first) {
first = false;
} else {
this.expect(12);
if (this.match(close)) {
this.addTrailingCommaExtraToNode(node);
break;
}
}
let prop;
if (isPattern) {
prop = this.parseBindingProperty();
} else {
prop = this.parsePropertyDefinition(refExpressionErrors);
this.checkProto(prop, isRecord, propHash, refExpressionErrors);
}
if (isRecord && !this.isObjectProperty(prop) && prop.type !== "SpreadElement") {
this.raise(_parseError.Errors.InvalidRecordProperty, {
at: prop
});
}
if (prop.shorthand) {
this.addExtra(prop, "shorthand", true);
}
node.properties.push(prop);
}
this.next();
this.state.inFSharpPipelineDirectBody = oldInFSharpPipelineDirectBody;
let type = "ObjectExpression";
if (isPattern) {
type = "ObjectPattern";
} else if (isRecord) {
type = "RecordExpression";
}
return this.finishNode(node, type);
}
addTrailingCommaExtraToNode(node) {
this.addExtra(node, "trailingComma", this.state.lastTokStart);
this.addExtra(node, "trailingCommaLoc", this.state.lastTokStartLoc, false);
}
maybeAsyncOrAccessorProp(prop) {
return !prop.computed && prop.key.type === "Identifier" && (this.isLiteralPropertyName() || this.match(0) || this.match(55));
}
parsePropertyDefinition(refExpressionErrors) {
let decorators = [];
if (this.match(26)) {
if (this.hasPlugin("decorators")) {
this.raise(_parseError.Errors.UnsupportedPropertyDecorator, {
at: this.state.startLoc
});
}
while (this.match(26)) {
decorators.push(this.parseDecorator());
}
}
const prop = this.startNode();
let isAsync = false;
let isAccessor = false;
let startLoc;
if (this.match(21)) {
if (decorators.length) this.unexpected();
return this.parseSpread();
}
if (decorators.length) {
prop.decorators = decorators;
decorators = [];
}
prop.method = false;
if (refExpressionErrors) {
startLoc = this.state.startLoc;
}
let isGenerator = this.eat(55);
this.parsePropertyNamePrefixOperator(prop);
const containsEsc = this.state.containsEsc;
const key = this.parsePropertyName(prop, refExpressionErrors);
if (!isGenerator && !containsEsc && this.maybeAsyncOrAccessorProp(prop)) {
const keyName = key.name;
if (keyName === "async" && !this.hasPrecedingLineBreak()) {
isAsync = true;
this.resetPreviousNodeTrailingComments(key);
isGenerator = this.eat(55);
this.parsePropertyName(prop);
}
if (keyName === "get" || keyName === "set") {
isAccessor = true;
this.resetPreviousNodeTrailingComments(key);
prop.kind = keyName;
if (this.match(55)) {
isGenerator = true;
this.raise(_parseError.Errors.AccessorIsGenerator, {
at: this.state.curPosition(),
kind: keyName
});
this.next();
}
this.parsePropertyName(prop);
}
}
return this.parseObjPropValue(prop, startLoc, isGenerator, isAsync, false, isAccessor, refExpressionErrors);
}
getGetterSetterExpectedParamCount(method) {
return method.kind === "get" ? 0 : 1;
}
getObjectOrClassMethodParams(method) {
return method.params;
}
checkGetterSetterParams(method) {
var _params;
const paramCount = this.getGetterSetterExpectedParamCount(method);
const params = this.getObjectOrClassMethodParams(method);
if (params.length !== paramCount) {
this.raise(method.kind === "get" ? _parseError.Errors.BadGetterArity : _parseError.Errors.BadSetterArity, {
at: method
});
}
if (method.kind === "set" && ((_params = params[params.length - 1]) == null ? void 0 : _params.type) === "RestElement") {
this.raise(_parseError.Errors.BadSetterRestParameter, {
at: method
});
}
}
parseObjectMethod(prop, isGenerator, isAsync, isPattern, isAccessor) {
if (isAccessor) {
const finishedProp = this.parseMethod(prop, isGenerator, false, false, false, "ObjectMethod");
this.checkGetterSetterParams(finishedProp);
return finishedProp;
}
if (isAsync || isGenerator || this.match(10)) {
if (isPattern) this.unexpected();
prop.kind = "method";
prop.method = true;
return this.parseMethod(prop, isGenerator, isAsync, false, false, "ObjectMethod");
}
}
parseObjectProperty(prop, startLoc, isPattern, refExpressionErrors) {
prop.shorthand = false;
if (this.eat(14)) {
prop.value = isPattern ? this.parseMaybeDefault(this.state.startLoc) : this.parseMaybeAssignAllowIn(refExpressionErrors);
return this.finishNode(prop, "ObjectProperty");
}
if (!prop.computed && prop.key.type === "Identifier") {
this.checkReservedWord(prop.key.name, prop.key.loc.start, true, false);
if (isPattern) {
prop.value = this.parseMaybeDefault(startLoc, (0, _node.cloneIdentifier)(prop.key));
} else if (this.match(29)) {
const shorthandAssignLoc = this.state.startLoc;
if (refExpressionErrors != null) {
if (refExpressionErrors.shorthandAssignLoc === null) {
refExpressionErrors.shorthandAssignLoc = shorthandAssignLoc;
}
} else {
this.raise(_parseError.Errors.InvalidCoverInitializedName, {
at: shorthandAssignLoc
});
}
prop.value = this.parseMaybeDefault(startLoc, (0, _node.cloneIdentifier)(prop.key));
} else {
prop.value = (0, _node.cloneIdentifier)(prop.key);
}
prop.shorthand = true;
return this.finishNode(prop, "ObjectProperty");
}
}
parseObjPropValue(prop, startLoc, isGenerator, isAsync, isPattern, isAccessor, refExpressionErrors) {
const node = this.parseObjectMethod(prop, isGenerator, isAsync, isPattern, isAccessor) || this.parseObjectProperty(prop, startLoc, isPattern, refExpressionErrors);
if (!node) this.unexpected();
return node;
}
parsePropertyName(prop, refExpressionErrors) {
if (this.eat(0)) {
prop.computed = true;
prop.key = this.parseMaybeAssignAllowIn();
this.expect(3);
} else {
const {
type,
value
} = this.state;
let key;
if ((0, _types.tokenIsKeywordOrIdentifier)(type)) {
key = this.parseIdentifier(true);
} else {
switch (type) {
case 132:
key = this.parseNumericLiteral(value);
break;
case 131:
key = this.parseStringLiteral(value);
break;
case 133:
key = this.parseBigIntLiteral(value);
break;
case 134:
key = this.parseDecimalLiteral(value);
break;
case 136:
{
const privateKeyLoc = this.state.startLoc;
if (refExpressionErrors != null) {
if (refExpressionErrors.privateKeyLoc === null) {
refExpressionErrors.privateKeyLoc = privateKeyLoc;
}
} else {
this.raise(_parseError.Errors.UnexpectedPrivateField, {
at: privateKeyLoc
});
}
key = this.parsePrivateName();
break;
}
default:
this.unexpected();
}
}
prop.key = key;
if (type !== 136) {
prop.computed = false;
}
}
return prop.key;
}
initFunction(node, isAsync) {
node.id = null;
node.generator = false;
node.async = isAsync;
}
parseMethod(node, isGenerator, isAsync, isConstructor, allowDirectSuper, type, inClassScope = false) {
this.initFunction(node, isAsync);
node.generator = isGenerator;
this.scope.enter(_scopeflags.SCOPE_FUNCTION | _scopeflags.SCOPE_SUPER | (inClassScope ? _scopeflags.SCOPE_CLASS : 0) | (allowDirectSuper ? _scopeflags.SCOPE_DIRECT_SUPER : 0));
this.prodParam.enter((0, _productionParameter.functionFlags)(isAsync, node.generator));
this.parseFunctionParams(node, isConstructor);
const finishedNode = this.parseFunctionBodyAndFinish(node, type, true);
this.prodParam.exit();
this.scope.exit();
return finishedNode;
}
parseArrayLike(close, canBePattern, isTuple, refExpressionErrors) {
if (isTuple) {
this.expectPlugin("recordAndTuple");
}
const oldInFSharpPipelineDirectBody = this.state.inFSharpPipelineDirectBody;
this.state.inFSharpPipelineDirectBody = false;
const node = this.startNode();
this.next();
node.elements = this.parseExprList(close, !isTuple, refExpressionErrors, node);
this.state.inFSharpPipelineDirectBody = oldInFSharpPipelineDirectBody;
return this.finishNode(node, isTuple ? "TupleExpression" : "ArrayExpression");
}
parseArrowExpression(node, params, isAsync, trailingCommaLoc) {
this.scope.enter(_scopeflags.SCOPE_FUNCTION | _scopeflags.SCOPE_ARROW);
let flags = (0, _productionParameter.functionFlags)(isAsync, false);
if (!this.match(5) && this.prodParam.hasIn) {
flags |= _productionParameter.PARAM_IN;
}
this.prodParam.enter(flags);
this.initFunction(node, isAsync);
const oldMaybeInArrowParameters = this.state.maybeInArrowParameters;
if (params) {
this.state.maybeInArrowParameters = true;
this.setArrowFunctionParameters(node, params, trailingCommaLoc);
}
this.state.maybeInArrowParameters = false;
this.parseFunctionBody(node, true);
this.prodParam.exit();
this.scope.exit();
this.state.maybeInArrowParameters = oldMaybeInArrowParameters;
return this.finishNode(node, "ArrowFunctionExpression");
}
setArrowFunctionParameters(node, params, trailingCommaLoc) {
this.toAssignableList(params, trailingCom