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var ieval = eval;
var AsyncFunction = async function(){}.constructor;
var functionContext = {
Function: {
constructor: Function,
toSourceBody: code => `function f() { ${code} }`,
toSourceParameter: code => `function f(x = ${code}) { }`,
},
AsyncFunction: {
constructor: AsyncFunction,
toSourceBody: code => `async function f() { ${code} }`,
toSourceParameter: code => `async function f(x = ${code}) { }`,
},
};
function assertSyntaxError(kind, code) {
var {constructor, toSourceBody, toSourceParameter} = functionContext[kind];
var body = toSourceBody(code);
var parameter = toSourceParameter(code);
assertThrowsInstanceOf(() => { constructor(code); }, SyntaxError, constructor.name + ":" + code);
assertThrowsInstanceOf(() => { constructor(`x = ${code}`, ""); }, SyntaxError, constructor.name + ":" + code);
assertThrowsInstanceOf(() => { eval(body); }, SyntaxError, "eval:" + body);
assertThrowsInstanceOf(() => { ieval(body); }, SyntaxError, "indirect eval:" + body);
assertThrowsInstanceOf(() => { eval(parameter); }, SyntaxError, "eval:" + parameter);
assertThrowsInstanceOf(() => { ieval(parameter); }, SyntaxError, "indirect eval:" + parameter);
}
function assertNoSyntaxError(kind, code) {
var {constructor, toSourceBody, toSourceParameter} = functionContext[kind];
var body = toSourceBody(code);
var parameter = toSourceParameter(code);
constructor(code);
constructor(`x = ${code}`, "");
eval(body);
ieval(body);
eval(parameter);
ieval(parameter);
}
function assertSyntaxErrorAsync(code) {
assertNoSyntaxError("Function", code);
assertSyntaxError("AsyncFunction", code);
}
function assertSyntaxErrorBoth(code) {
assertSyntaxError("Function", code);
assertSyntaxError("AsyncFunction", code);
}
// Bug 1353691
// |await| expression is invalid in arrow functions in async-context.
// |await/r/g| first parses as |AwaitExpression RegularExpressionLiteral|, when reparsing the
// arrow function, it is parsed as |IdentRef DIV IdentRef DIV IdentRef|. We need to ensure in this
// case, that we still treat |await| as a keyword and hence throw a SyntaxError.
assertSyntaxErrorAsync("(a = await/r/g) => {}");
assertSyntaxErrorBoth("async(a = await/r/g) => {}");
// Also applies when nesting arrow functions.
assertSyntaxErrorAsync("(a = (b = await/r/g) => {}) => {}");
assertSyntaxErrorBoth("async(a = (b = await/r/g) => {}) => {}");
assertSyntaxErrorBoth("(a = async(b = await/r/g) => {}) => {}");
assertSyntaxErrorBoth("async(a = async(b = await/r/g) => {}) => {}");
// Bug 1355860
// |await| cannot be used as rest-binding parameter in arrow functions in async-context.
assertSyntaxErrorAsync("(...await) => {}");
assertSyntaxErrorBoth("async(...await) => {}");
assertSyntaxErrorAsync("(a, ...await) => {}");
assertSyntaxErrorBoth("async(a, ...await) => {}");
// Also test nested arrow functions.
assertSyntaxErrorAsync("(a = (...await) => {}) => {}");
assertSyntaxErrorBoth("(a = async(...await) => {}) => {}");
assertSyntaxErrorBoth("async(a = (...await) => {}) => {}");
assertSyntaxErrorBoth("async(a = async(...await) => {}) => {}");
assertSyntaxErrorAsync("(a = (b, ...await) => {}) => {}");
assertSyntaxErrorBoth("(a = async(b, ...await) => {}) => {}");
assertSyntaxErrorBoth("async(a = (b, ...await) => {}) => {}");
assertSyntaxErrorBoth("async(a = async(b, ...await) => {}) => {}");
if (typeof reportCompare === "function")
reportCompare(true, true);
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