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// Copyright 2016 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
function checkIsRedeclarationError(code) {
try {
eval(`
checkIsRedeclarationError : {
break checkIsRedeclarationError;
${code}
}
`);
assertUnreachable();
} catch(e) {
assertInstanceof(e, SyntaxError );
assertTrue( e.toString().indexOf("has already been declared") >= 0 );
}
}
function checkIsNotRedeclarationError(code) {
assertDoesNotThrow(()=>eval(`
checkIsNotRedeclarationError_label : {
break checkIsNotRedeclarationError_label;
${code}
}
`));
}
let lexical_e = [
'let e',
'let f, g, e',
'let [f] = [], [] = [], e = e, h',
'let {e} = 0',
'let {f, e} = 0',
'let {f, g} = 0, {e} = 0',
'let {f = 0, e = 1} = 0',
'let [e] = 0',
'let [f, e] = 0',
'let {f:e} = 0',
'let [[[], e]] = 0',
'const e = 0',
'const f = 0, g = 0, e = 0',
'const {e} = 0',
'const [e] = 0',
'const {f:e} = 0',
'const [[[], e]] = 0',
'function e(){}',
'function* e(){}',
];
let not_lexical_e = [
'var e',
'var f, e',
'var {e} = 0',
'let {} = 0',
'let {e:f} = 0',
'{ function e(){} }'
];
// Check that lexical declarations cannot override a simple catch parameter
for (let declaration of lexical_e) {
checkIsRedeclarationError(`
try {
throw 0;
} catch(e) {
${declaration}
}
`);
}
// Check that lexical declarations cannot override a complex catch parameter
for (let declaration of lexical_e) {
checkIsRedeclarationError(`
try {
throw 0;
} catch({e}) {
${declaration}
}
`);
}
// Check that non-lexical declarations can override a simple catch parameter
for (let declaration of not_lexical_e) {
checkIsNotRedeclarationError(`
try {
throw 0;
} catch(e) {
${declaration}
}
`);
}
// Check that the above error does not occur if a declaration scope is between
// the catch and the loop.
for (let declaration of lexical_e) {
checkIsNotRedeclarationError(`
try {
throw 0;
} catch(e) {
(()=>{${declaration}})();
}
`);
checkIsNotRedeclarationError(`
try {
throw 0;
} catch(e) {
(function(){${declaration}})();
}
`);
}