rest-parameter-names.js

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// Any copyright is dedicated to the Public Domain.

// http://creativecommons.org/licenses/publicdomain/

//-----------------------------------------------------------------------------

var BUGNUMBER = 1288460;

var summary =

  "Rest parameters to functions can be named |yield| or |eval| or |let| in "

  "non-strict code";

print(BUGNUMBER + ": " + summary);

/**************

 * BEGIN TEST *

 **************/

var f1 = (...yield) => yield + 42;

assertEq(f1(), "42");

assertEq(f1(1), "142");

var f2 = (...eval) => eval + 42;

assertEq(f2(), "42");

assertEq(f2(1), "142");

var f3 = (...let) => let + 42;

assertEq(f3(), "42");

assertEq(f3(1), "142");

function g1(x, ...yield)

  return yield + x;

assertEq(g1(0, 42), "420");

function g2(x, ...eval)

  return eval + x;

assertEq(g2(0, 42), "420");

function g3(x, ...let)

  return let + x;

assertEq(g3(0, 42), "420");

function h()

  "use strict";

  var badNames = ["yield", "eval", "let"];

  for (var badName of ["yield", "eval", "let"])

    assertThrowsInstanceOf(() => eval(`var q = (...${badName}) => ${badName} + 42;`),

                           SyntaxError);

    assertThrowsInstanceOf(() => eval(`function r(x, ...${badName}) { return x + ${badName}; }`),

                           SyntaxError);

h();

/******************************************************************************/

if (typeof reportCompare === "function")

  reportCompare(true, true);

print("Tests complete");