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rOACCT/node_modules/@babel/traverse/lib/path/inference/inferer-reference.js
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inferer-reference.js
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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = _default;
var t = _interopRequireWildcard(require("@babel/types"));
function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function () { return cache; }; return cache; }
function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
function _default(node) {
if (!this.isReferenced()) return;
const binding = this.scope.getBinding(node.name);
if (binding) {
if (binding.identifier.typeAnnotation) {
return binding.identifier.typeAnnotation;
} else {
return getTypeAnnotationBindingConstantViolations(binding, this, node.name);
}
}
if (node.name === "undefined") {
return t.voidTypeAnnotation();
} else if (node.name === "NaN" || node.name === "Infinity") {
return t.numberTypeAnnotation();
} else if (node.name === "arguments") {}
}
function getTypeAnnotationBindingConstantViolations(binding, path, name) {
const types = [];
const functionConstantViolations = [];
let constantViolations = getConstantViolationsBefore(binding, path, functionConstantViolations);
const testType = getConditionalAnnotation(binding, path, name);
if (testType) {
const testConstantViolations = getConstantViolationsBefore(binding, testType.ifStatement);
constantViolations = constantViolations.filter(path => testConstantViolations.indexOf(path) < 0);
types.push(testType.typeAnnotation);
}
if (constantViolations.length) {
constantViolations = constantViolations.concat(functionConstantViolations);
for (const violation of constantViolations) {
types.push(violation.getTypeAnnotation());
}
}
if (!types.length) {
return;
}
if (t.isTSTypeAnnotation(types[0]) && t.createTSUnionType) {
return t.createTSUnionType(types);
}
if (t.createFlowUnionType) {
return t.createFlowUnionType(types);
}
return t.createUnionTypeAnnotation(types);
}
function getConstantViolationsBefore(binding, path, functions) {
const violations = binding.constantViolations.slice();
violations.unshift(binding.path);
return violations.filter(violation => {
violation = violation.resolve();
const status = violation._guessExecutionStatusRelativeTo(path);
if (functions && status === "unknown") functions.push(violation);
return status === "before";
});
}
function inferAnnotationFromBinaryExpression(name, path) {
const operator = path.node.operator;
const right = path.get("right").resolve();
const left = path.get("left").resolve();
let target;
if (left.isIdentifier({
name
})) {
target = right;
} else if (right.isIdentifier({
name
})) {
target = left;
}
if (target) {
if (operator === "===") {
return target.getTypeAnnotation();
}
if (t.BOOLEAN_NUMBER_BINARY_OPERATORS.indexOf(operator) >= 0) {
return t.numberTypeAnnotation();
}
return;
}
if (operator !== "===" && operator !== "==") return;
let typeofPath;
let typePath;
if (left.isUnaryExpression({
operator: "typeof"
})) {
typeofPath = left;
typePath = right;
} else if (right.isUnaryExpression({
operator: "typeof"
})) {
typeofPath = right;
typePath = left;
}
if (!typeofPath) return;
if (!typeofPath.get("argument").isIdentifier({
name
})) return;
typePath = typePath.resolve();
if (!typePath.isLiteral()) return;
const typeValue = typePath.node.value;
if (typeof typeValue !== "string") return;
return t.createTypeAnnotationBasedOnTypeof(typeValue);
}
function getParentConditionalPath(binding, path, name) {
let parentPath;
while (parentPath = path.parentPath) {
if (parentPath.isIfStatement() || parentPath.isConditionalExpression()) {
if (path.key === "test") {
return;
}
return parentPath;
}
if (parentPath.isFunction()) {
if (parentPath.parentPath.scope.getBinding(name) !== binding) return;
}
path = parentPath;
}
}
function getConditionalAnnotation(binding, path, name) {
const ifStatement = getParentConditionalPath(binding, path, name);
if (!ifStatement) return;
const test = ifStatement.get("test");
const paths = [test];
const types = [];
for (let i = 0; i < paths.length; i++) {
const path = paths[i];
if (path.isLogicalExpression()) {
if (path.node.operator === "&&") {
paths.push(path.get("left"));
paths.push(path.get("right"));
}
} else if (path.isBinaryExpression()) {
const type = inferAnnotationFromBinaryExpression(name, path);
if (type) types.push(type);
}
}
if (types.length) {
if (t.isTSTypeAnnotation(types[0]) && t.createTSUnionType) {
return {
typeAnnotation: t.createTSUnionType(types),
ifStatement
};
}
if (t.createFlowUnionType) {
return {
typeAnnotation: t.createFlowUnionType(types),
ifStatement
};
}
return {
typeAnnotation: t.createUnionTypeAnnotation(types),
ifStatement
};
}
return getConditionalAnnotation(ifStatement, name);
}
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