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"use strict";
// Returns "Type(value) is Object" in ES terminology.
function isObject(value) {
return typeof value === "object" && value !== null || typeof value === "function";
}
function hasOwn(obj, prop) {
return Object.prototype.hasOwnProperty.call(obj, prop);
}
const wrapperSymbol = Symbol("wrapper");
const implSymbol = Symbol("impl");
const sameObjectCaches = Symbol("SameObject caches");
const ctorRegistrySymbol = Symbol.for("[webidl2js] constructor registry");
function getSameObject(wrapper, prop, creator) {
if (!wrapper[sameObjectCaches]) {
wrapper[sameObjectCaches] = Object.create(null);
}
if (prop in wrapper[sameObjectCaches]) {
return wrapper[sameObjectCaches][prop];
}
wrapper[sameObjectCaches][prop] = creator();
return wrapper[sameObjectCaches][prop];
}
function wrapperForImpl(impl) {
return impl ? impl[wrapperSymbol] : null;
}
function implForWrapper(wrapper) {
return wrapper ? wrapper[implSymbol] : null;
}
function tryWrapperForImpl(impl) {
const wrapper = wrapperForImpl(impl);
return wrapper ? wrapper : impl;
}
function tryImplForWrapper(wrapper) {
const impl = implForWrapper(wrapper);
return impl ? impl : wrapper;
}
const iterInternalSymbol = Symbol("internal");
const IteratorPrototype = Object.getPrototypeOf(Object.getPrototypeOf([][Symbol.iterator]()));
function isArrayIndexPropName(P) {
if (typeof P !== "string") {
return false;
}
const i = P >>> 0;
if (i === Math.pow(2, 32) - 1) {
return false;
}
const s = `${i}`;
if (P !== s) {
return false;
}
return true;
}
const byteLengthGetter =
Object.getOwnPropertyDescriptor(ArrayBuffer.prototype, "byteLength").get;
function isArrayBuffer(value) {
try {
byteLengthGetter.call(value);
return true;
} catch (e) {
return false;
}
}
const supportsPropertyIndex = Symbol("supports property index");
const supportedPropertyIndices = Symbol("supported property indices");
const supportsPropertyName = Symbol("supports property name");
const supportedPropertyNames = Symbol("supported property names");
const indexedGet = Symbol("indexed property get");
const indexedSetNew = Symbol("indexed property set new");
const indexedSetExisting = Symbol("indexed property set existing");
const namedGet = Symbol("named property get");
const namedSetNew = Symbol("named property set new");
const namedSetExisting = Symbol("named property set existing");
const namedDelete = Symbol("named property delete");
module.exports = exports = {
isObject,
hasOwn,
wrapperSymbol,
implSymbol,
getSameObject,
ctorRegistrySymbol,
wrapperForImpl,
implForWrapper,
tryWrapperForImpl,
tryImplForWrapper,
iterInternalSymbol,
IteratorPrototype,
isArrayBuffer,
isArrayIndexPropName,
supportsPropertyIndex,
supportedPropertyIndices,
supportsPropertyName,
supportedPropertyNames,
indexedGet,
indexedSetNew,
indexedSetExisting,
namedGet,
namedSetNew,
namedSetExisting,
namedDelete
};
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