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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports._guessExecutionStatusRelativeTo = _guessExecutionStatusRelativeTo;
exports._guessExecutionStatusRelativeToDifferentFunctions = _guessExecutionStatusRelativeToDifferentFunctions;
exports._resolve = _resolve;
exports.canHaveVariableDeclarationOrExpression = canHaveVariableDeclarationOrExpression;
exports.canSwapBetweenExpressionAndStatement = canSwapBetweenExpressionAndStatement;
exports.equals = equals;
exports.getSource = getSource;
exports.has = has;
exports.is = void 0;
exports.isCompletionRecord = isCompletionRecord;
exports.isConstantExpression = isConstantExpression;
exports.isInStrictMode = isInStrictMode;
exports.isNodeType = isNodeType;
exports.isStatementOrBlock = isStatementOrBlock;
exports.isStatic = isStatic;
exports.isnt = isnt;
exports.matchesPattern = matchesPattern;
exports.referencesImport = referencesImport;
exports.resolve = resolve;
exports.willIMaybeExecuteBefore = willIMaybeExecuteBefore;
var _t = require("@babel/types");
const {
STATEMENT_OR_BLOCK_KEYS,
VISITOR_KEYS,
isBlockStatement,
isExpression,
isIdentifier,
isLiteral,
isStringLiteral,
isType,
matchesPattern: _matchesPattern
} = _t;
function matchesPattern(pattern, allowPartial) {
return _matchesPattern(this.node, pattern, allowPartial);
}
function has(key) {
const val = this.node && this.node[key];
if (val && Array.isArray(val)) {
return !!val.length;
} else {
return !!val;
}
}
function isStatic() {
return this.scope.isStatic(this.node);
}
const is = has;
exports.is = is;
function isnt(key) {
return !this.has(key);
}
function equals(key, value) {
return this.node[key] === value;
}
function isNodeType(type) {
return isType(this.type, type);
}
function canHaveVariableDeclarationOrExpression() {
return (this.key === "init" || this.key === "left") && this.parentPath.isFor();
}
function canSwapBetweenExpressionAndStatement(replacement) {
if (this.key !== "body" || !this.parentPath.isArrowFunctionExpression()) {
return false;
}
if (this.isExpression()) {
return isBlockStatement(replacement);
} else if (this.isBlockStatement()) {
return isExpression(replacement);
}
return false;
}
function isCompletionRecord(allowInsideFunction) {
let path = this;
let first = true;
do {
const container = path.container;
if (path.isFunction() && !first) {
return !!allowInsideFunction;
}
first = false;
if (Array.isArray(container) && path.key !== container.length - 1) {
return false;
}
} while ((path = path.parentPath) && !path.isProgram());
return true;
}
function isStatementOrBlock() {
if (this.parentPath.isLabeledStatement() || isBlockStatement(this.container)) {
return false;
} else {
return STATEMENT_OR_BLOCK_KEYS.includes(this.key);
}
}
function referencesImport(moduleSource, importName) {
if (!this.isReferencedIdentifier()) {
if ((this.isMemberExpression() || this.isOptionalMemberExpression()) && (this.node.computed ? isStringLiteral(this.node.property, {
value: importName
}) : this.node.property.name === importName)) {
const object = this.get("object");
return object.isReferencedIdentifier() && object.referencesImport(moduleSource, "*");
}
return false;
}
const binding = this.scope.getBinding(this.node.name);
if (!binding || binding.kind !== "module") return false;
const path = binding.path;
const parent = path.parentPath;
if (!parent.isImportDeclaration()) return false;
if (parent.node.source.value === moduleSource) {
if (!importName) return true;
} else {
return false;
}
if (path.isImportDefaultSpecifier() && importName === "default") {
return true;
}
if (path.isImportNamespaceSpecifier() && importName === "*") {
return true;
}
if (path.isImportSpecifier() && isIdentifier(path.node.imported, {
name: importName
})) {
return true;
}
return false;
}
function getSource() {
const node = this.node;
if (node.end) {
const code = this.hub.getCode();
if (code) return code.slice(node.start, node.end);
}
return "";
}
function willIMaybeExecuteBefore(target) {
return this._guessExecutionStatusRelativeTo(target) !== "after";
}
function getOuterFunction(path) {
return (path.scope.getFunctionParent() || path.scope.getProgramParent()).path;
}
function isExecutionUncertain(type, key) {
switch (type) {
case "LogicalExpression":
return key === "right";
case "ConditionalExpression":
case "IfStatement":
return key === "consequent" || key === "alternate";
case "WhileStatement":
case "DoWhileStatement":
case "ForInStatement":
case "ForOfStatement":
return key === "body";
case "ForStatement":
return key === "body" || key === "update";
case "SwitchStatement":
return key === "cases";
case "TryStatement":
return key === "handler";
case "AssignmentPattern":
return key === "right";
case "OptionalMemberExpression":
return key === "property";
case "OptionalCallExpression":
return key === "arguments";
default:
return false;
}
}
function isExecutionUncertainInList(paths, maxIndex) {
for (let i = 0; i < maxIndex; i++) {
const path = paths[i];
if (isExecutionUncertain(path.parent.type, path.parentKey)) {
return true;
}
}
return false;
}
function _guessExecutionStatusRelativeTo(target) {
const funcParent = {
this: getOuterFunction(this),
target: getOuterFunction(target)
};
if (funcParent.target.node !== funcParent.this.node) {
return this._guessExecutionStatusRelativeToDifferentFunctions(funcParent.target);
}
const paths = {
target: target.getAncestry(),
this: this.getAncestry()
};
if (paths.target.indexOf(this) >= 0) return "after";
if (paths.this.indexOf(target) >= 0) return "before";
let commonPath;
const commonIndex = {
target: 0,
this: 0
};
while (!commonPath && commonIndex.this < paths.this.length) {
const path = paths.this[commonIndex.this];
commonIndex.target = paths.target.indexOf(path);
if (commonIndex.target >= 0) {
commonPath = path;
} else {
commonIndex.this++;
}
}
if (!commonPath) {
throw new Error("Internal Babel error - The two compared nodes" + " don't appear to belong to the same program.");
}
if (isExecutionUncertainInList(paths.this, commonIndex.this - 1) || isExecutionUncertainInList(paths.target, commonIndex.target - 1)) {
return "unknown";
}
const divergence = {
this: paths.this[commonIndex.this - 1],
target: paths.target[commonIndex.target - 1]
};
if (divergence.target.listKey && divergence.this.listKey && divergence.target.container === divergence.this.container) {
return divergence.target.key > divergence.this.key ? "before" : "after";
}
const keys = VISITOR_KEYS[commonPath.type];
const keyPosition = {
this: keys.indexOf(divergence.this.parentKey),
target: keys.indexOf(divergence.target.parentKey)
};
return keyPosition.target > keyPosition.this ? "before" : "after";
}
const executionOrderCheckedNodes = new WeakSet();
function _guessExecutionStatusRelativeToDifferentFunctions(target) {
if (!target.isFunctionDeclaration() || target.parentPath.isExportDeclaration()) {
return "unknown";
}
const binding = target.scope.getBinding(target.node.id.name);
if (!binding.references) return "before";
const referencePaths = binding.referencePaths;
let allStatus;
for (const path of referencePaths) {
const childOfFunction = !!path.find(path => path.node === target.node);
if (childOfFunction) continue;
if (path.key !== "callee" || !path.parentPath.isCallExpression()) {
return "unknown";
}
if (executionOrderCheckedNodes.has(path.node)) continue;
executionOrderCheckedNodes.add(path.node);
const status = this._guessExecutionStatusRelativeTo(path);
executionOrderCheckedNodes.delete(path.node);
if (allStatus && allStatus !== status) {
return "unknown";
} else {
allStatus = status;
}
}
return allStatus;
}
function resolve(dangerous, resolved) {
return this._resolve(dangerous, resolved) || this;
}
function _resolve(dangerous, resolved) {
if (resolved && resolved.indexOf(this) >= 0) return;
resolved = resolved || [];
resolved.push(this);
if (this.isVariableDeclarator()) {
if (this.get("id").isIdentifier()) {
return this.get("init").resolve(dangerous, resolved);
} else {}
} else if (this.isReferencedIdentifier()) {
const binding = this.scope.getBinding(this.node.name);
if (!binding) return;
if (!binding.constant) return;
if (binding.kind === "module") return;
if (binding.path !== this) {
const ret = binding.path.resolve(dangerous, resolved);
if (this.find(parent => parent.node === ret.node)) return;
return ret;
}
} else if (this.isTypeCastExpression()) {
return this.get("expression").resolve(dangerous, resolved);
} else if (dangerous && this.isMemberExpression()) {
const targetKey = this.toComputedKey();
if (!isLiteral(targetKey)) return;
const targetName = targetKey.value;
const target = this.get("object").resolve(dangerous, resolved);
if (target.isObjectExpression()) {
const props = target.get("properties");
for (const prop of props) {
if (!prop.isProperty()) continue;
const key = prop.get("key");
let match = prop.isnt("computed") && key.isIdentifier({
name: targetName
});
match = match || key.isLiteral({
value: targetName
});
if (match) return prop.get("value").resolve(dangerous, resolved);
}
} else if (target.isArrayExpression() && !isNaN(+targetName)) {
const elems = target.get("elements");
const elem = elems[targetName];
if (elem) return elem.resolve(dangerous, resolved);
}
}
}
function isConstantExpression() {
if (this.isIdentifier()) {
const binding = this.scope.getBinding(this.node.name);
if (!binding) return false;
return binding.constant;
}
if (this.isLiteral()) {
if (this.isRegExpLiteral()) {
return false;
}
if (this.isTemplateLiteral()) {
return this.get("expressions").every(expression => expression.isConstantExpression());
}
return true;
}
if (this.isUnaryExpression()) {
if (this.node.operator !== "void") {
return false;
}
return this.get("argument").isConstantExpression();
}
if (this.isBinaryExpression()) {
return this.get("left").isConstantExpression() && this.get("right").isConstantExpression();
}
return false;
}
function isInStrictMode() {
const start = this.isProgram() ? this : this.parentPath;
const strictParent = start.find(path => {
if (path.isProgram({
sourceType: "module"
})) return true;
if (path.isClass()) return true;
if (!path.isProgram() && !path.isFunction()) return false;
if (path.isArrowFunctionExpression() && !path.get("body").isBlockStatement()) {
return false;
}
const body = path.isFunction() ? path.node.body : path.node;
for (const directive of body.directives) {
if (directive.value.value === "use strict") {
return true;
}
}
});
return !!strictParent;
}