canonical
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Canonical code style linter and formatter for JavaScript, SCSS, CSS and JSON.
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JavaScript
(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.babylon = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
"use strict";
var _interopRequireDefault = require("babel-runtime/helpers/interop-require-default")["default"];
exports.__esModule = true;
exports.parse = parse;
var _parser = require("./parser");
var _parser2 = _interopRequireDefault(_parser);
require("./parser/util");
require("./parser/statement");
require("./parser/lval");
require("./parser/expression");
require("./parser/node");
require("./parser/location");
require("./parser/comments");
var _tokenizerTypes = require("./tokenizer/types");
require("./tokenizer");
require("./tokenizer/context");
var _pluginsFlow = require("./plugins/flow");
var _pluginsFlow2 = _interopRequireDefault(_pluginsFlow);
var _pluginsJsx = require("./plugins/jsx");
var _pluginsJsx2 = _interopRequireDefault(_pluginsJsx);
_parser.plugins.flow = _pluginsFlow2["default"];
_parser.plugins.jsx = _pluginsJsx2["default"];
function parse(input, options) {
return new _parser2["default"](options, input).parse();
}
exports.tokTypes = _tokenizerTypes.types;
},{"./parser":5,"./parser/comments":3,"./parser/expression":4,"./parser/location":6,"./parser/lval":7,"./parser/node":8,"./parser/statement":9,"./parser/util":10,"./plugins/flow":11,"./plugins/jsx":12,"./tokenizer":15,"./tokenizer/context":14,"./tokenizer/types":17,"babel-runtime/helpers/interop-require-default":26}],2:[function(require,module,exports){
/* @flow */
// A second optional argument can be given to further configure
"use strict";
exports.__esModule = true;
exports.getOptions = getOptions;
var defaultOptions /*: {
sourceType: string,
allowReturnOutsideFunction: boolean,
allowImportExportEverywhere: boolean,
allowSuperOutsideMethod: boolean,
plugins: Array<string>,
strictMode: any
}*/ = {
// Source type ("script" or "module") for different semantics
sourceType: "script",
// When enabled, a return at the top level is not considered an
// error.
allowReturnOutsideFunction: false,
// When enabled, import/export statements are not constrained to
// appearing at the top of the program.
allowImportExportEverywhere: false,
// TODO
allowSuperOutsideMethod: false,
// An array of plugins to enable
plugins: [],
// TODO
strictMode: null
};
exports.defaultOptions = defaultOptions;
// Interpret and default an options object
function getOptions(opts /*:: ?: Object*/) /*: Object*/ {
var options = {};
for (var key in defaultOptions) {
options[key] = opts && key in opts ? opts[key] : defaultOptions[key];
}
return options;
}
// the parser process. These options are recognized:
},{}],3:[function(require,module,exports){
/* @flow */
/**
* Based on the comment attachment algorithm used in espree and estraverse.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
"use strict";
var _interopRequireDefault = require("babel-runtime/helpers/interop-require-default")["default"];
var _index = require("./index");
var _index2 = _interopRequireDefault(_index);
function last(stack) {
return stack[stack.length - 1];
}
var pp = _index2["default"].prototype;
pp.addComment = function (comment) {
this.state.trailingComments.push(comment);
this.state.leadingComments.push(comment);
};
pp.processComment = function (node) {
if (node.type === "Program" && node.body.length > 0) return;
var stack = this.state.commentStack;
var lastChild = undefined,
trailingComments = undefined,
i = undefined;
if (this.state.trailingComments.length > 0) {
// If the first comment in trailingComments comes after the
// current node, then we're good - all comments in the array will
// come after the node and so it's safe to add them as official
// trailingComments.
if (this.state.trailingComments[0].start >= node.end) {
trailingComments = this.state.trailingComments;
this.state.trailingComments = [];
} else {
// Otherwise, if the first comment doesn't come after the
// current node, that means we have a mix of leading and trailing
// comments in the array and that leadingComments contains the
// same items as trailingComments. Reset trailingComments to
// zero items and we'll handle this by evaluating leadingComments
// later.
this.state.trailingComments.length = 0;
}
} else {
var lastInStack = last(stack);
if (stack.length > 0 && lastInStack.trailingComments && lastInStack.trailingComments[0].start >= node.end) {
trailingComments = lastInStack.trailingComments;
lastInStack.trailingComments = null;
}
}
// Eating the stack.
while (stack.length > 0 && last(stack).start >= node.start) {
lastChild = stack.pop();
}
if (lastChild) {
if (lastChild.leadingComments) {
if (lastChild !== node && last(lastChild.leadingComments).end <= node.start) {
node.leadingComments = lastChild.leadingComments;
lastChild.leadingComments = null;
} else {
// A leading comment for an anonymous class had been stolen by its first ClassMethod,
// so this takes back the leading comment.
// See also: https://github.com/eslint/espree/issues/158
for (i = lastChild.leadingComments.length - 2; i >= 0; --i) {
if (lastChild.leadingComments[i].end <= node.start) {
node.leadingComments = lastChild.leadingComments.splice(0, i + 1);
break;
}
}
}
}
} else if (this.state.leadingComments.length > 0) {
if (last(this.state.leadingComments).end <= node.start) {
node.leadingComments = this.state.leadingComments;
this.state.leadingComments = [];
} else {
// https://github.com/eslint/espree/issues/2
//
// In special cases, such as return (without a value) and
// debugger, all comments will end up as leadingComments and
// will otherwise be eliminated. This step runs when the
// commentStack is empty and there are comments left
// in leadingComments.
//
// This loop figures out the stopping point between the actual
// leading and trailing comments by finding the location of the
// first comment that comes after the given node.
for (i = 0; i < this.state.leadingComments.length; i++) {
if (this.state.leadingComments[i].end > node.start) {
break;
}
}
// Split the array based on the location of the first comment
// that comes after the node. Keep in mind that this could
// result in an empty array, and if so, the array must be
// deleted.
node.leadingComments = this.state.leadingComments.slice(0, i);
if ((node.leadingComments /*: Array<any>*/).length === 0) {
node.leadingComments = null;
}
// Similarly, trailing comments are attached later. The variable
// must be reset to null if there are no trailing comments.
trailingComments = this.state.leadingComments.slice(i);
if (trailingComments.length === 0) {
trailingComments = null;
}
}
}
if (trailingComments) {
if (trailingComments.length && trailingComments[0].start >= node.start && last(trailingComments).end <= node.end) {
node.innerComments = trailingComments;
} else {
node.trailingComments = trailingComments;
}
}
stack.push(node);
};
},{"./index":5,"babel-runtime/helpers/interop-require-default":26}],4:[function(require,module,exports){
// A recursive descent parser operates by defining functions for all
// syntactic elements, and recursively calling those, each function
// advancing the input stream and returning an AST node. Precedence
// of constructs (for example, the fact that `!x[1]` means `!(x[1])`
// instead of `(!x)[1]` is handled by the fact that the parser
// function that parses unary prefix operators is called first, and
// in turn calls the function that parses `[]` subscripts — that
// way, it'll receive the node for `x[1]` already parsed, and wraps
// *that* in the unary operator node.
//
// Acorn uses an [operator precedence parser][opp] to handle binary
// operator precedence, because it is much more compact than using
// the technique outlined above, which uses different, nesting
// functions to specify precedence, for all of the ten binary
// precedence levels that JavaScript defines.
//
// [opp]: http://en.wikipedia.org/wiki/Operator-precedence_parser
"use strict";
var _Object$create = require("babel-runtime/core-js/object/create")["default"];
var _getIterator = require("babel-runtime/core-js/get-iterator")["default"];
var _interopRequireDefault = require("babel-runtime/helpers/interop-require-default")["default"];
var _tokenizerTypes = require("../tokenizer/types");
var _index = require("./index");
var _index2 = _interopRequireDefault(_index);
var _utilIdentifier = require("../util/identifier");
var pp = _index2["default"].prototype;
// Check if property name clashes with already added.
// Object/class getters and setters are not allowed to clash —
// either with each other or with an init property — and in
// strict mode, init properties are also not allowed to be repeated.
pp.checkPropClash = function (prop, propHash) {
if (prop.computed) return;
var key = prop.key;
var name = undefined;
switch (key.type) {
case "Identifier":
name = key.name;
break;
case "StringLiteral":
case "NumericLiteral":
name = String(key.value);
break;
default:
return;
}
if (name === "__proto__" && prop.kind === "init") {
if (propHash.proto) this.raise(key.start, "Redefinition of __proto__ property");
propHash.proto = true;
}
};
// ### Expression parsing
// These nest, from the most general expression type at the top to
// 'atomic', nondivisible expression types at the bottom. Most of
// the functions will simply let the function (s) below them parse,
// and, *if* the syntactic construct they handle is present, wrap
// the AST node that the inner parser gave them in another node.
// Parse a full expression. The optional arguments are used to
// forbid the `in` operator (in for loops initalization expressions)
// and provide reference for storing '=' operator inside shorthand
// property assignment in contexts where both object expression
// and object pattern might appear (so it's possible to raise
// delayed syntax error at correct position).
pp.parseExpression = function (noIn, refShorthandDefaultPos) {
var startPos = this.state.start,
startLoc = this.state.startLoc;
var expr = this.parseMaybeAssign(noIn, refShorthandDefaultPos);
if (this.match(_tokenizerTypes.types.comma)) {
var node = this.startNodeAt(startPos, startLoc);
node.expressions = [expr];
while (this.eat(_tokenizerTypes.types.comma)) {
node.expressions.push(this.parseMaybeAssign(noIn, refShorthandDefaultPos));
}
this.toReferencedList(node.expressions);
return this.finishNode(node, "SequenceExpression");
}
return expr;
};
// Parse an assignment expression. This includes applications of
// operators like `+=`.
pp.parseMaybeAssign = function (noIn, refShorthandDefaultPos, afterLeftParse) {
if (this.match(_tokenizerTypes.types._yield) && this.state.inGenerator) {
return this.parseYield();
}
var failOnShorthandAssign = undefined;
if (refShorthandDefaultPos) {
failOnShorthandAssign = false;
} else {
refShorthandDefaultPos = { start: 0 };
failOnShorthandAssign = true;
}
var startPos = this.state.start;
var startLoc = this.state.startLoc;
if (this.match(_tokenizerTypes.types.parenL) || this.match(_tokenizerTypes.types.name)) {
this.state.potentialArrowAt = this.state.start;
}
var left = this.parseMaybeConditional(noIn, refShorthandDefaultPos);
if (afterLeftParse) left = afterLeftParse.call(this, left, startPos, startLoc);
if (this.state.type.isAssign) {
var node = this.startNodeAt(startPos, startLoc);
node.operator = this.state.value;
node.left = this.match(_tokenizerTypes.types.eq) ? this.toAssignable(left) : left;
refShorthandDefaultPos.start = 0; // reset because shorthand default was used correctly
this.checkLVal(left);
if (left.extra && left.extra.parenthesized) {
var errorMsg = undefined;
if (left.type === "ObjectPattern") {
errorMsg = "`({a}) = 0` use `({a} = 0)`";
} else if (left.type === "ArrayPattern") {
errorMsg = "`([a]) = 0` use `([a] = 0)`";
}
if (errorMsg) {
this.raise(left.start, "You're trying to assign to a parenthesized expression, eg. instead of " + errorMsg);
}
}
this.next();
node.right = this.parseMaybeAssign(noIn);
return this.finishNode(node, "AssignmentExpression");
} else if (failOnShorthandAssign && refShorthandDefaultPos.start) {
this.unexpected(refShorthandDefaultPos.start);
}
return left;
};
// Parse a ternary conditional (`?:`) operator.
pp.parseMaybeConditional = function (noIn, refShorthandDefaultPos) {
var startPos = this.state.start,
startLoc = this.state.startLoc;
var expr = this.parseExprOps(noIn, refShorthandDefaultPos);
if (refShorthandDefaultPos && refShorthandDefaultPos.start) return expr;
if (this.eat(_tokenizerTypes.types.question)) {
var node = this.startNodeAt(startPos, startLoc);
node.test = expr;
node.consequent = this.parseMaybeAssign();
this.expect(_tokenizerTypes.types.colon);
node.alternate = this.parseMaybeAssign(noIn);
return this.finishNode(node, "ConditionalExpression");
}
return expr;
};
// Start the precedence parser.
pp.parseExprOps = function (noIn, refShorthandDefaultPos) {
var startPos = this.state.start,
startLoc = this.state.startLoc;
var expr = this.parseMaybeUnary(refShorthandDefaultPos);
if (refShorthandDefaultPos && refShorthandDefaultPos.start) {
return expr;
} else {
return this.parseExprOp(expr, startPos, startLoc, -1, noIn);
}
};
// Parse binary operators with the operator precedence parsing
// algorithm. `left` is the left-hand side of the operator.
// `minPrec` provides context that allows the function to stop and
// defer further parser to one of its callers when it encounters an
// operator that has a lower precedence than the set it is parsing.
pp.parseExprOp = function (left, leftStartPos, leftStartLoc, minPrec, noIn) {
var prec = this.state.type.binop;
if (prec != null && (!noIn || !this.match(_tokenizerTypes.types._in))) {
if (prec > minPrec) {
var node = this.startNodeAt(leftStartPos, leftStartLoc);
node.left = left;
node.operator = this.state.value;
if (node.operator === "**" && left.type === "UnaryExpression" && left.extra && !left.extra.parenthesizedArgument) {
this.raise(left.argument.start, "Illegal expression. Wrap left hand side or entire exponentiation in parentheses.");
}
var op = this.state.type;
this.next();
var startPos = this.state.start;
var startLoc = this.state.startLoc;
node.right = this.parseExprOp(this.parseMaybeUnary(), startPos, startLoc, op.rightAssociative ? prec - 1 : prec, noIn);
this.finishNode(node, op === _tokenizerTypes.types.logicalOR || op === _tokenizerTypes.types.logicalAND ? "LogicalExpression" : "BinaryExpression");
return this.parseExprOp(node, leftStartPos, leftStartLoc, minPrec, noIn);
}
}
return left;
};
// Parse unary operators, both prefix and postfix.
pp.parseMaybeUnary = function (refShorthandDefaultPos) {
if (this.state.type.prefix) {
var node = this.startNode();
var update = this.match(_tokenizerTypes.types.incDec);
node.operator = this.state.value;
node.prefix = true;
this.next();
var argType = this.state.type;
this.addExtra(node, "parenthesizedArgument", argType === _tokenizerTypes.types.parenL);
node.argument = this.parseMaybeUnary();
if (refShorthandDefaultPos && refShorthandDefaultPos.start) {
this.unexpected(refShorthandDefaultPos.start);
}
if (update) {
this.checkLVal(node.argument);
} else if (this.state.strict && node.operator === "delete" && node.argument.type === "Identifier") {
this.raise(node.start, "Deleting local variable in strict mode");
}
return this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression");
}
var startPos = this.state.start,
startLoc = this.state.startLoc;
var expr = this.parseExprSubscripts(refShorthandDefaultPos);
if (refShorthandDefaultPos && refShorthandDefaultPos.start) return expr;
while (this.state.type.postfix && !this.canInsertSemicolon()) {
var node = this.startNodeAt(startPos, startLoc);
node.operator = this.state.value;
node.prefix = false;
node.argument = expr;
this.checkLVal(expr);
this.next();
expr = this.finishNode(node, "UpdateExpression");
}
return expr;
};
// Parse call, dot, and `[]`-subscript expressions.
pp.parseExprSubscripts = function (refShorthandDefaultPos) {
var startPos = this.state.start,
startLoc = this.state.startLoc;
var potentialArrowAt = this.state.potentialArrowAt;
var expr = this.parseExprAtom(refShorthandDefaultPos);
if (expr.type === "ArrowFunctionExpression" && expr.start === potentialArrowAt) {
return expr;
}
if (refShorthandDefaultPos && refShorthandDefaultPos.start) {
return expr;
}
return this.parseSubscripts(expr, startPos, startLoc);
};
pp.parseSubscripts = function (base, startPos, startLoc, noCalls) {
for (;;) {
if (!noCalls && this.eat(_tokenizerTypes.types.doubleColon)) {
var node = this.startNodeAt(startPos, startLoc);
node.object = base;
node.callee = this.parseNoCallExpr();
return this.parseSubscripts(this.finishNode(node, "BindExpression"), startPos, startLoc, noCalls);
} else if (this.eat(_tokenizerTypes.types.dot)) {
var node = this.startNodeAt(startPos, startLoc);
node.object = base;
node.property = this.parseIdentifier(true);
node.computed = false;
base = this.finishNode(node, "MemberExpression");
} else if (this.eat(_tokenizerTypes.types.bracketL)) {
var node = this.startNodeAt(startPos, startLoc);
node.object = base;
node.property = this.parseExpression();
node.computed = true;
this.expect(_tokenizerTypes.types.bracketR);
base = this.finishNode(node, "MemberExpression");
} else if (!noCalls && this.match(_tokenizerTypes.types.parenL)) {
var possibleAsync = this.state.potentialArrowAt === base.start && base.type === "Identifier" && base.name === "async" && !this.canInsertSemicolon();
this.next();
var node = this.startNodeAt(startPos, startLoc);
node.callee = base;
node.arguments = this.parseCallExpressionArguments(_tokenizerTypes.types.parenR, this.hasPlugin("trailingFunctionCommas"), possibleAsync);
base = this.finishNode(node, "CallExpression");
if (possibleAsync && this.shouldParseAsyncArrow()) {
return this.parseAsyncArrowFromCallExpression(this.startNodeAt(startPos, startLoc), node);
} else {
this.toReferencedList(node.arguments);
}
} else if (this.match(_tokenizerTypes.types.backQuote)) {
var node = this.startNodeAt(startPos, startLoc);
node.tag = base;
node.quasi = this.parseTemplate();
base = this.finishNode(node, "TaggedTemplateExpression");
} else {
return base;
}
}
};
pp.parseCallExpressionArguments = function (close, allowTrailingComma, possibleAsyncArrow) {
var innerParenStart = undefined;
var elts = [],
first = true;
while (!this.eat(close)) {
if (first) {
first = false;
} else {
this.expect(_tokenizerTypes.types.comma);
if (allowTrailingComma && this.eat(close)) break;
}
// we need to make sure that if this is an async arrow functions, that we don't allow inner parens inside the params
if (this.match(_tokenizerTypes.types.parenL) && !innerParenStart) {
innerParenStart = this.state.start;
}
elts.push(this.parseExprListItem());
}
// we found an async arrow function so let's not allow any inner parens
if (possibleAsyncArrow && innerParenStart && this.shouldParseAsyncArrow()) {
this.unexpected();
}
return elts;
};
pp.shouldParseAsyncArrow = function () {
return this.match(_tokenizerTypes.types.arrow);
};
pp.parseAsyncArrowFromCallExpression = function (node, call) {
if (!this.hasPlugin("asyncFunctions")) this.unexpected();
this.expect(_tokenizerTypes.types.arrow);
return this.parseArrowExpression(node, call.arguments, true);
};
// Parse a no-call expression (like argument of `new` or `::` operators).
pp.parseNoCallExpr = function () {
var startPos = this.state.start,
startLoc = this.state.startLoc;
return this.parseSubscripts(this.parseExprAtom(), startPos, startLoc, true);
};
// Parse an atomic expression — either a single token that is an
// expression, an expression started by a keyword like `function` or
// `new`, or an expression wrapped in punctuation like `()`, `[]`,
// or `{}`.
pp.parseExprAtom = function (refShorthandDefaultPos) {
var node = undefined,
canBeArrow = this.state.potentialArrowAt === this.state.start;
switch (this.state.type) {
case _tokenizerTypes.types._super:
if (!this.state.inMethod && !this.options.allowSuperOutsideMethod) {
this.raise(this.state.start, "'super' outside of function or class");
}
node = this.startNode();
this.next();
if (!this.match(_tokenizerTypes.types.parenL) && !this.match(_tokenizerTypes.types.bracketL) && !this.match(_tokenizerTypes.types.dot)) {
this.unexpected();
}
if (this.match(_tokenizerTypes.types.parenL) && this.state.inMethod !== "constructor" && !this.options.allowSuperOutsideMethod) {
this.raise(node.start, "super() outside of class constructor");
}
return this.finishNode(node, "Super");
case _tokenizerTypes.types._this:
node = this.startNode();
this.next();
return this.finishNode(node, "ThisExpression");
case _tokenizerTypes.types._yield:
if (this.state.inGenerator) this.unexpected();
case _tokenizerTypes.types.name:
node = this.startNode();
var allowAwait = this.hasPlugin("asyncFunctions") && this.state.value === "await" && this.state.inAsync;
var allowYield = this.shouldAllowYieldIdentifier();
var id = this.parseIdentifier(allowAwait || allowYield);
if (this.hasPlugin("asyncFunctions")) {
if (id.name === "await") {
if (this.state.inAsync || this.inModule) {
return this.parseAwait(node);
}
} else if (id.name === "async" && this.match(_tokenizerTypes.types._function) && !this.canInsertSemicolon()) {
this.next();
return this.parseFunction(node, false, false, true);
} else if (canBeArrow && id.name === "async" && this.match(_tokenizerTypes.types.name)) {
var params = [this.parseIdentifier()];
this.expect(_tokenizerTypes.types.arrow);
// let foo = bar => {};
return this.parseArrowExpression(node, params, true);
}
}
if (canBeArrow && !this.canInsertSemicolon() && this.eat(_tokenizerTypes.types.arrow)) {
return this.parseArrowExpression(node, [id]);
}
return id;
case _tokenizerTypes.types._do:
if (this.hasPlugin("doExpressions")) {
var _node = this.startNode();
this.next();
var oldInFunction = this.state.inFunction;
var oldLabels = this.state.labels;
this.state.labels = [];
this.state.inFunction = false;
_node.body = this.parseBlock(false, true);
this.state.inFunction = oldInFunction;
this.state.labels = oldLabels;
return this.finishNode(_node, "DoExpression");
}
case _tokenizerTypes.types.regexp:
var value = this.state.value;
node = this.parseLiteral(value.value, "RegExpLiteral");
node.pattern = value.pattern;
node.flags = value.flags;
return node;
case _tokenizerTypes.types.num:
return this.parseLiteral(this.state.value, "NumericLiteral");
case _tokenizerTypes.types.string:
return this.parseLiteral(this.state.value, "StringLiteral");
case _tokenizerTypes.types._null:
node = this.startNode();
this.next();
return this.finishNode(node, "NullLiteral");
case _tokenizerTypes.types._true:case _tokenizerTypes.types._false:
node = this.startNode();
node.value = this.match(_tokenizerTypes.types._true);
this.next();
return this.finishNode(node, "BooleanLiteral");
case _tokenizerTypes.types.parenL:
return this.parseParenAndDistinguishExpression(null, null, canBeArrow);
case _tokenizerTypes.types.bracketL:
node = this.startNode();
this.next();
node.elements = this.parseExprList(_tokenizerTypes.types.bracketR, true, true, refShorthandDefaultPos);
this.toReferencedList(node.elements);
return this.finishNode(node, "ArrayExpression");
case _tokenizerTypes.types.braceL:
return this.parseObj(false, refShorthandDefaultPos);
case _tokenizerTypes.types._function:
return this.parseFunctionExpression();
case _tokenizerTypes.types.at:
this.parseDecorators();
case _tokenizerTypes.types._class:
node = this.startNode();
this.takeDecorators(node);
return this.parseClass(node, false);
case _tokenizerTypes.types._new:
return this.parseNew();
case _tokenizerTypes.types.backQuote:
return this.parseTemplate();
case _tokenizerTypes.types.doubleColon:
node = this.startNode();
this.next();
node.object = null;
var callee = node.callee = this.parseNoCallExpr();
if (callee.type === "MemberExpression") {
return this.finishNode(node, "BindExpression");
} else {
this.raise(callee.start, "Binding should be performed on object property.");
}
default:
this.unexpected();
}
};
pp.parseFunctionExpression = function () {
var node = this.startNode();
var meta = this.parseIdentifier(true);
if (this.state.inGenerator && this.eat(_tokenizerTypes.types.dot) && this.hasPlugin("functionSent")) {
return this.parseMetaProperty(node, meta, "sent");
} else {
return this.parseFunction(node, false);
}
};
pp.parseMetaProperty = function (node, meta, propertyName) {
node.meta = meta;
node.property = this.parseIdentifier(true);
if (node.property.name !== propertyName) {
this.raise(node.property.start, "The only valid meta property for new is " + meta.name + "." + propertyName);
}
return this.finishNode(node, "MetaProperty");
};
pp.parseLiteral = function (value, type) {
var node = this.startNode();
this.addExtra(node, "rawValue", value);
this.addExtra(node, "raw", this.input.slice(this.state.start, this.state.end));
node.value = value;
this.next();
return this.finishNode(node, type);
};
pp.parseParenExpression = function () {
this.expect(_tokenizerTypes.types.parenL);
var val = this.parseExpression();
this.expect(_tokenizerTypes.types.parenR);
return val;
};
pp.parseParenAndDistinguishExpression = function (startPos, startLoc, canBeArrow, isAsync, allowOptionalCommaStart) {
startPos = startPos || this.state.start;
startLoc = startLoc || this.state.startLoc;
var val = undefined;
this.next();
var innerStartPos = this.state.start,
innerStartLoc = this.state.startLoc;
var exprList = [],
first = true;
var refShorthandDefaultPos = { start: 0 },
spreadStart = undefined,
optionalCommaStart = undefined;
while (!this.match(_tokenizerTypes.types.parenR)) {
if (first) {
first = false;
} else {
this.expect(_tokenizerTypes.types.comma);
if (this.match(_tokenizerTypes.types.parenR) && this.hasPlugin("trailingFunctionCommas")) {
optionalCommaStart = this.state.start;
break;
}
}
if (this.match(_tokenizerTypes.types.ellipsis)) {
var spreadNodeStartPos = this.state.start,
spreadNodeStartLoc = this.state.startLoc;
spreadStart = this.state.start;
exprList.push(this.parseParenItem(this.parseRest(), spreadNodeStartLoc, spreadNodeStartPos));
break;
} else {
exprList.push(this.parseMaybeAssign(false, refShorthandDefaultPos, this.parseParenItem));
}
}
var innerEndPos = this.state.start;
var innerEndLoc = this.state.startLoc;
this.expect(_tokenizerTypes.types.parenR);
if (canBeArrow && !this.canInsertSemicolon() && this.eat(_tokenizerTypes.types.arrow)) {
for (var _i = 0; _i < exprList.length; _i++) {
var param = exprList[_i];
if (param.extra && param.extra.parenthesized) this.unexpected(param.extra.parenStart);
}
return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), exprList, isAsync);
}
if (!exprList.length) {
if (isAsync) {
return;
} else {
this.unexpected(this.state.lastTokStart);
}
}
if (optionalCommaStart && !allowOptionalCommaStart) this.unexpected(optionalCommaStart);
if (spreadStart) this.unexpected(spreadStart);
if (refShorthandDefaultPos.start) this.unexpected(refShorthandDefaultPos.start);
if (exprList.length > 1) {
val = this.startNodeAt(innerStartPos, innerStartLoc);
val.expressions = exprList;
this.toReferencedList(val.expressions);
this.finishNodeAt(val, "SequenceExpression", innerEndPos, innerEndLoc);
} else {
val = exprList[0];
}
this.addExtra(val, "parenthesized", true);
this.addExtra(val, "parenStart", startPos);
return val;
};
pp.parseParenItem = function (node) {
return node;
};
// New's precedence is slightly tricky. It must allow its argument
// to be a `[]` or dot subscript expression, but not a call — at
// least, not without wrapping it in parentheses. Thus, it uses the
pp.parseNew = function () {
var node = this.startNode();
var meta = this.parseIdentifier(true);
if (this.eat(_tokenizerTypes.types.dot)) {
return this.parseMetaProperty(node, meta, "target");
}
node.callee = this.parseNoCallExpr();
if (this.eat(_tokenizerTypes.types.parenL)) {
node.arguments = this.parseExprList(_tokenizerTypes.types.parenR, this.hasPlugin("trailingFunctionCommas"));
this.toReferencedList(node.arguments);
} else {
node.arguments = [];
}
return this.finishNode(node, "NewExpression");
};
// Parse template expression.
pp.parseTemplateElement = function () {
var elem = this.startNode();
elem.value = {
raw: this.input.slice(this.state.start, this.state.end).replace(/\r\n?/g, "\n"),
cooked: this.state.value
};
this.next();
elem.tail = this.match(_tokenizerTypes.types.backQuote);
return this.finishNode(elem, "TemplateElement");
};
pp.parseTemplate = function () {
var node = this.startNode();
this.next();
node.expressions = [];
var curElt = this.parseTemplateElement();
node.quasis = [curElt];
while (!curElt.tail) {
this.expect(_tokenizerTypes.types.dollarBraceL);
node.expressions.push(this.parseExpression());
this.expect(_tokenizerTypes.types.braceR);
node.quasis.push(curElt = this.parseTemplateElement());
}
this.next();
return this.finishNode(node, "TemplateLiteral");
};
// Parse an object literal or binding pattern.
pp.parseObj = function (isPattern, refShorthandDefaultPos) {
var decorators = [];
var propHash = _Object$create(null);
var first = true;
var node = this.startNode();
node.properties = [];
this.next();
while (!this.eat(_tokenizerTypes.types.braceR)) {
if (first) {
first = false;
} else {
this.expect(_tokenizerTypes.types.comma);
if (this.eat(_tokenizerTypes.types.braceR)) break;
}
while (this.match(_tokenizerTypes.types.at)) {
decorators.push(this.parseDecorator());
}
var prop = this.startNode(),
isGenerator = false,
isAsync = false,
startPos = undefined,
startLoc = undefined;
if (decorators.length) {
prop.decorators = decorators;
decorators = [];
}
if (this.hasPlugin("objectRestSpread") && this.match(_tokenizerTypes.types.ellipsis)) {
prop = this.parseSpread();
prop.type = isPattern ? "RestProperty" : "SpreadProperty";
node.properties.push(prop);
continue;
}
prop.method = false;
prop.shorthand = false;
if (isPattern || refShorthandDefaultPos) {
startPos = this.state.start;
startLoc = this.state.startLoc;
}
if (!isPattern) {
isGenerator = this.eat(_tokenizerTypes.types.star);
}
if (!isPattern && this.hasPlugin("asyncFunctions") && this.isContextual("async")) {
if (isGenerator) this.unexpected();
var asyncId = this.parseIdentifier();
if (this.match(_tokenizerTypes.types.colon) || this.match(_tokenizerTypes.types.parenL) || this.match(_tokenizerTypes.types.braceR)) {
prop.key = asyncId;
} else {
isAsync = true;
if (this.hasPlugin("asyncGenerators")) isGenerator = this.eat(_tokenizerTypes.types.star);
this.parsePropertyName(prop);
}
} else {
this.parsePropertyName(prop);
}
this.parseObjPropValue(prop, startPos, startLoc, isGenerator, isAsync, isPattern, refShorthandDefaultPos);
this.checkPropClash(prop, propHash);
if (prop.shorthand) {
this.addExtra(prop, "shorthand", true);
}
node.properties.push(prop);
}
if (decorators.length) {
this.raise(this.state.start, "You have trailing decorators with no property");
}
return this.finishNode(node, isPattern ? "ObjectPattern" : "ObjectExpression");
};
pp.parseObjPropValue = function (prop, startPos, startLoc, isGenerator, isAsync, isPattern, refShorthandDefaultPos) {
if (isAsync || isGenerator || this.match(_tokenizerTypes.types.parenL)) {
if (isPattern) this.unexpected();
prop.kind = "method";
prop.method = true;
this.parseMethod(prop, isGenerator, isAsync);
return this.finishNode(prop, "ObjectMethod");
}
if (this.eat(_tokenizerTypes.types.colon)) {
prop.value = isPattern ? this.parseMaybeDefault(this.state.start, this.state.startLoc) : this.parseMaybeAssign(false, refShorthandDefaultPos);
return this.finishNode(prop, "ObjectProperty");
}
if (!prop.computed && prop.key.type === "Identifier" && (prop.key.name === "get" || prop.key.name === "set") && !this.match(_tokenizerTypes.types.comma) && !this.match(_tokenizerTypes.types.braceR)) {
if (isGenerator || isAsync || isPattern) this.unexpected();
prop.kind = prop.key.name;
this.parsePropertyName(prop);
this.parseMethod(prop, false);
var paramCount = prop.kind === "get" ? 0 : 1;
if (prop.params.length !== paramCount) {
var start = prop.start;
if (prop.kind === "get") {
this.raise(start, "getter should have no params");
} else {
this.raise(start, "setter should have exactly one param");
}
}
return this.finishNode(prop, "ObjectMethod");
}
if (!prop.computed && prop.key.type === "Identifier") {
if (isPattern) {
var illegalBinding = this.isKeyword(prop.key.name);
if (!illegalBinding && this.state.strict) {
illegalBinding = _utilIdentifier.reservedWords.strictBind(prop.key.name) || _utilIdentifier.reservedWords.strict(prop.key.name);
}
if (illegalBinding) {
this.raise(prop.key.start, "Binding " + prop.key.name);
}
prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key.__clone());
} else if (this.match(_tokenizerTypes.types.eq) && refShorthandDefaultPos) {
if (!refShorthandDefaultPos.start) {
refShorthandDefaultPos.start = this.state.start;
}
prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key.__clone());
} else {
prop.value = prop.key.__clone();
}
prop.shorthand = true;
return this.finishNode(prop, "ObjectProperty");
}
this.unexpected();
};
pp.parsePropertyName = function (prop) {
if (this.eat(_tokenizerTypes.types.bracketL)) {
prop.computed = true;
prop.key = this.parseMaybeAssign();
this.expect(_tokenizerTypes.types.bracketR);
return prop.key;
} else {
prop.computed = false;
return prop.key = this.match(_tokenizerTypes.types.num) || this.match(_tokenizerTypes.types.string) ? this.parseExprAtom() : this.parseIdentifier(true);
}
};
// Initialize empty function node.
pp.initFunction = function (node, isAsync) {
node.id = null;
node.generator = false;
node.expression = false;
if (this.hasPlugin("asyncFunctions")) {
node.async = !!isAsync;
}
};
// Parse object or class method.
pp.parseMethod = function (node, isGenerator, isAsync) {
var oldInMethod = this.state.inMethod;
this.state.inMethod = node.kind || true;
this.initFunction(node, isAsync);
this.expect(_tokenizerTypes.types.parenL);
node.params = this.parseBindingList(_tokenizerTypes.types.parenR, false, this.hasPlugin("trailingFunctionCommas"));
node.generator = isGenerator;
this.parseFunctionBody(node);
this.state.inMethod = oldInMethod;
return node;
};
// Parse arrow function expression with given parameters.
pp.parseArrowExpression = function (node, params, isAsync) {
this.initFunction(node, isAsync);
node.params = this.toAssignableList(params, true);
this.parseFunctionBody(node, true);
return this.finishNode(node, "ArrowFunctionExpression");
};
// Parse function body and check parameters.
pp.parseFunctionBody = function (node, allowExpression) {
var isExpression = allowExpression && !this.match(_tokenizerTypes.types.braceL);
var oldInAsync = this.state.inAsync;
this.state.inAsync = node.async;
if (isExpression) {
node.body = this.parseMaybeAssign();
node.expression = true;
} else {
// Start a new scope with regard to labels and the `inFunction`
// flag (restore them to their old value afterwards).
var oldInFunc = this.state.inFunction,
oldInGen = this.state.inGenerator,
oldLabels = this.state.labels;
this.state.inFunction = true;this.state.inGenerator = node.generator;this.state.labels = [];
node.body = this.parseBlock(true);
node.expression = false;
this.state.inFunction = oldInFunc;this.state.inGenerator = oldInGen;this.state.labels = oldLabels;
}
this.state.inAsync = oldInAsync;
// If this is a strict mode function, verify that argument names
// are not repeated, and it does not try to bind the words `eval`
// or `arguments`.
var checkLVal = this.state.strict;
var checkLValStrict = false;
var isStrict = false;
// arrow function
if (allowExpression) checkLVal = true;
// normal function
if (!isExpression && node.body.directives.length) {
for (var _iterator = (node.body.directives /*: Array<Object>*/), _isArray = Array.isArray(_iterator), _i2 = 0, _iterator = _isArray ? _iterator : _getIterator(_iterator);;) {
var _ref;
if (_isArray) {
if (_i2 >= _iterator.length) break;
_ref = _iterator[_i2++];
} else {
_i2 = _iterator.next();
if (_i2.done) break;
_ref = _i2.value;
}
var directive = _ref;
if (directive.value.value === "use strict") {
isStrict = true;
checkLVal = true;
checkLValStrict = true;
break;
}
}
}
//
if (isStrict && node.id && node.id.type === "Identifier" && node.id.name === "yield") {
this.raise(node.id.start, "Binding yield in strict mode");
}
if (checkLVal) {
var nameHash = _Object$create(null);
var oldStrict = this.state.strict;
if (checkLValStrict) this.state.strict = true;
if (node.id) {
this.checkLVal(node.id, true);
}
for (var _iterator2 = (node.params /*: Array<Object>*/), _isArray2 = Array.isArray(_iterator2), _i3 = 0, _iterator2 = _isArray2 ? _iterator2 : _getIterator(_iterator2);;) {
var _ref2;
if (_isArray2) {
if (_i3 >= _iterator2.length) break;
_ref2 = _iterator2[_i3++];
} else {
_i3 = _iterator2.next();
if (_i3.done) break;
_ref2 = _i3.value;
}
var param = _ref2;
this.checkLVal(param, true, nameHash);
}
this.state.strict = oldStrict;
}
};
// Parses a comma-separated list of expressions, and returns them as
// an array. `close` is the token type that ends the list, and
// `allowEmpty` can be turned on to allow subsequent commas with
// nothing in between them to be parsed as `null` (which is needed
// for array literals).
pp.parseExprList = function (close, allowTrailingComma, allowEmpty, refShorthandDefaultPos) {
var elts = [],
first = true;
while (!this.eat(close)) {
if (first) {
first = false;
} else {
this.expect(_tokenizerTypes.types.comma);
if (allowTrailingComma && this.eat(close)) break;
}
elts.push(this.parseExprListItem(allowEmpty, refShorthandDefaultPos));
}
return elts;
};
pp.parseExprListItem = function (allowEmpty, refShorthandDefaultPos) {
var elt = undefined;
if (allowEmpty && this.match(_tokenizerTypes.types.comma)) {
elt = null;
} else if (this.match(_tokenizerTypes.types.ellipsis)) {
elt = this.parseSpread(refShorthandDefaultPos);
} else {
elt = this.parseMaybeAssign(false, refShorthandDefaultPos);
}
return elt;
};
// Parse the next token as an identifier. If `liberal` is true (used
// when parsing properties), it will also convert keywords into
// identifiers.
pp.parseIdentifier = function (liberal) {
var node = this.startNode();
if (this.match(_tokenizerTypes.types.name)) {
if (!liberal && this.state.strict && _utilIdentifier.reservedWords.strict(this.state.value)) {
this.raise(this.state.start, "The keyword '" + this.state.value + "' is reserved");
}
node.name = this.state.value;
} else if (liberal && this.state.type.keyword) {
node.name = this.state.type.keyword;
} else {
this.unexpected();
}
if (!liberal && node.name === "await" && this.state.inAsync) {
this.raise(node.start, "invalid use of await inside of an async function");
}
this.next();
return this.finishNode(node, "Identifier");
};
// Parses await expression inside async function.
pp.parseAwait = function (node) {
if (!this.state.inAsync) {
this.unexpected();
}
if (this.isLineTerminator()) {
this.unexpected();
}
if (this.match(_tokenizerTypes.types.star)) {
this.raise(node.start, "await* has been removed from the async functions proposal. Use Promise.all() instead.");
}
node.argument = this.parseMaybeUnary();
return this.finishNode(node, "AwaitExpression");
};
// Parses yield expression inside generator.
pp.parseYield = function () {
var node = this.startNode();
this.next();
if (this.match(_tokenizerTypes.types.semi) || this.canInsertSemicolon() || !this.match(_tokenizerTypes.types.star) && !this.state.type.startsExpr) {
node.delegate = false;
node.argument = null;
} else {
node.delegate = this.eat(_tokenizerTypes.types.star);
node.argument = this.parseMaybeAssign();
}
return this.finishNode(node, "YieldExpression");
};
},{"../tokenizer/types":17,"../util/identifier":18,"./index":5,"babel-runtime/core-js/get-iterator":21,"babel-runtime/core-js/object/create":22,"babel-runtime/helpers/interop-require-default":26}],5:[function(require,module,exports){
/* @flow */
"use strict";
var _inherits = require("babel-runtime/helpers/inherits")["default"];
var _classCallCheck = require("babel-runtime/helpers/class-call-check")["default"];
var _getIterator = require("babel-runtime/core-js/get-iterator")["default"];
var _interopRequireDefault = require("babel-runtime/helpers/interop-require-default")["default"];
exports.__esModule = true;
var _utilIdentifier = require("../util/identifier");
var _options = require("../options");
var _tokenizer = require("../tokenizer");
var _tokenizer2 = _interopRequireDefault(_tokenizer);
var plugins = {};
exports.plugins = plugins;
var Parser = (function (_Tokenizer) {
_inherits(Parser, _Tokenizer);
function Parser(options /*: Object*/, input /*: string*/) {
_classCallCheck(this, Parser);
options = _options.getOptions(options);
_Tokenizer.call(this, options, input);
this.options = options;
this.inModule = this.options.sourceType === "module";
this.isReservedWord = _utilIdentifier.reservedWords[6];
this.input = input;
this.plugins = this.loadPlugins(this.options.plugins);
// If enabled, skip leading hashbang line.
if (this.state.pos === 0 && this.input[0] === "#" && this.input[1] === "!") {
this.skipLineComment(2);
}
}
Parser.prototype.hasPlugin = function hasPlugin(name /*: string*/) /*: boolean*/ {
return !!(this.plugins["*"] || this.plugins[name]);
};
Parser.prototype.extend = function extend(name /*: string*/, f /*: Function*/) {
this[name] = f(this[name]);
};
Parser.prototype.loadPlugins = function loadPlugins(plugins /*: Array<string>*/) /*: Object*/ {
var pluginMap = {};
if (plugins.indexOf("flow") >= 0) {
// ensure flow plugin loads last
plugins = plugins.filter(function (plugin) {
return plugin !== "flow";
});
plugins.push("flow");
}
for (var _iterator = plugins, _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : _getIterator(_iterator);;) {
var _ref;
if (_isArray) {
if (_i >= _iterator.length) break;
_ref = _iterator[_i++];
} else {
_i = _iterator.next();
if (_i.done) break;
_ref = _i.value;
}
var _name = _ref;
if (!pluginMap[_name]) {
pluginMap[_name] = true;
var plugin = exports.plugins[_name];
if (plugin) plugin(this);
}
}
return pluginMap;
};
Parser.prototype.parse = function parse() /*: {
type: "File",
program: {
type: "Program",
body: Array<Object>
}
}*/ {
var file = this.startNode();
var program = this.startNode();
this.nextToken();
return this.parseTopLevel(file, program);
};
return Parser;
})(_tokenizer2["default"]);
exports["default"] = Parser;
},{"../options":2,"../tokenizer":15,"../util/identifier":18,"babel-runtime/core-js/get-iterator":21,"babel-runtime/helpers/class-call-check":24,"babel-runtime/helpers/inherits":25,"babel-runtime/helpers/interop-require-default":26}],6:[function(require,module,exports){
"use strict";
var _interopRequireDefault = require("babel-runtime/helpers/interop-require-default")["default"];
var _utilLocation = require("../util/location");
var _index = require("./index");
var _index2 = _interopRequireDefault(_index);
var pp = _index2["default"].prototype;
// This function is used to raise exceptions on parse errors. It
// takes an offset integer (into the current `input`) to indicate
// the location of the error, attaches the position to the end
// of the error message, and then raises a `SyntaxError` with that
// message.
pp.raise = function (pos, message) {
var loc = _utilLocation.getLineInfo(this.input, pos);
message += " (" + loc.line + ":" + loc.column + ")";
var err = new SyntaxError(message);
err.pos = pos;
err.loc = loc;
throw err;
};
},{"../util/location":19,"./index":5,"babel-runtime/helpers/interop-require-default":26}],7:[function(require,module,exports){
"use strict";
var _getIte