yield-regexp.js - mozsearch

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// Bug 1099956

load(libdir + "asserts.js");

// Parses as IDENT(yield) DIV IDENT(abc) DIV IDENT(g).

eval(`function f1() { yield /abc/g; }`);

// Throws a ReferenceError because no global "yield" variable is defined.

var ex;

try {

  f1();

} catch(e) {

  ex = e;

assertEq(ex instanceof ReferenceError, true);

// Parses as YIELD REGEXP(/abc/g).

function* f2() {

  yield /abc/g;

g = f2();

v = g.next();

assertEq(v.done, false);

assertEq(v.value instanceof RegExp, true);

assertEq(v.value.toString(), "/abc/g");

v = g.next();

assertEq(v.done, true);