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#430: fix reversions with legacy generators, restore/new tests
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@ -5910,7 +5910,7 @@ Parser<ParseHandler>::forStatement(YieldHandling yieldHandling)
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if (matched) {
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iflags = JSITER_FOREACH;
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isForEach = true;
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addTelemetry(JSCompartment::DeprecatedForEach);
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//addTelemetry(JSCompartment::DeprecatedForEach);
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if (versionNumber() < JSVERSION_LATEST) {
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if (!report(ParseWarning, pc->sc->strict(), null(), JSMSG_DEPRECATED_FOR_EACH))
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return null();
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@ -8392,7 +8392,7 @@ Parser<FullParseHandler>::legacyComprehensionTail(ParseNode* bodyExpr, unsigned
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return null();
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if (matched) {
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pn2->pn_iflags |= JSITER_FOREACH;
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addTelemetry(JSCompartment::DeprecatedForEach);
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//addTelemetry(JSCompartment::DeprecatedForEach);
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if (versionNumber() < JSVERSION_LATEST) {
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if (!report(ParseWarning, pc->sc->strict(), pn2, JSMSG_DEPRECATED_FOR_EACH))
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return null();
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@ -10084,16 +10084,6 @@ Parser<ParseHandler>::primaryExpr(YieldHandling yieldHandling, TripledotHandling
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}
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}
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template <typename ParseHandler>
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typename ParseHandler::Node
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Parser<ParseHandler>::exprInParens(InHandling inHandling, YieldHandling yieldHandling,
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TripledotHandling tripledotHandling,
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PossibleError* possibleError)
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{
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MOZ_ASSERT(tokenStream.isCurrentTokenType(TOK_LP));
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return expr(inHandling, yieldHandling, tripledotHandling, possibleError, PredictInvoked);
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}
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// Legacy generator comprehensions can appear anywhere an expression is
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// enclosed in parentheses, even if those parentheses are part of statement
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// syntax or a function call:
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@ -10111,6 +10101,44 @@ Parser<ParseHandler>::exprInParens(InHandling inHandling, YieldHandling yieldHan
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// sum(x*x for (x in y)); // ok
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// sum(for (x of y) x*x); // SyntaxError: needs more parens
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//
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template <typename ParseHandler>
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typename ParseHandler::Node
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Parser<ParseHandler>::exprInParens(InHandling inHandling, YieldHandling yieldHandling,
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TripledotHandling tripledotHandling,
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PossibleError* possibleError)
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{
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MOZ_ASSERT(tokenStream.isCurrentTokenType(TOK_LP));
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uint32_t begin = pos().begin;
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uint32_t startYieldOffset = pc->lastYieldOffset;
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Node pn = expr(inHandling, yieldHandling, tripledotHandling, possibleError, PredictInvoked);
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if (!pn)
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return null();
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#if JS_HAS_GENERATOR_EXPRS
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bool matched;
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if (!tokenStream.matchToken(&matched, TOK_FOR))
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return null();
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if (matched) {
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if (pc->lastYieldOffset != startYieldOffset) {
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reportWithOffset(ParseError, false, pc->lastYieldOffset,
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JSMSG_BAD_GENEXP_BODY, js_yield_str);
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return null();
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}
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if (handler.isUnparenthesizedCommaExpression(pn)) {
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report(ParseError, false, null(), JSMSG_BAD_GENERATOR_SYNTAX);
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return null();
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}
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pn = legacyGeneratorExpr(pn);
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if (!pn)
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return null();
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handler.setBeginPosition(pn, begin);
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}
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#endif /* JS_HAS_GENERATOR_EXPRS */
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return pn;
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}
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template <typename ParseHandler>
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typename ParseHandler::Node
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Parser<ParseHandler>::exprInParens(InHandling inHandling, YieldHandling yieldHandling,
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4
js/src/jit-test/tests/arguments/defaults-bug790424.js
Normal file
4
js/src/jit-test/tests/arguments/defaults-bug790424.js
Normal file
@ -0,0 +1,4 @@
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function f1(g=((function () { return 4; }) for (x of [1]))) {
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return g.next()();
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}
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assertEq(f1(), 4);
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@ -16,6 +16,7 @@ assertEq(f3()()(), true);
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// These should be okay.
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function f4(f=(function () { with (Object) {} }), g=(function () { "use strict"; })) {}
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function f5(g=(function () { "use strict"; }), f=(function () { with (Object) {} })) {}
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function f6(f=(function () { return (x for (y in (function g() {}))); })) {}
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assertThrowsInstanceOf(function () {
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eval("'use strict'; function f(a=delete x) { }");
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7
js/src/jit-test/tests/arguments/genexpr-1.js
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7
js/src/jit-test/tests/arguments/genexpr-1.js
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@ -0,0 +1,7 @@
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// No 'arguments' binding in genexprs at toplevel.
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load(libdir + "asserts.js");
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delete this.arguments; // it is defined in the shell
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var iter = (arguments for (x of [1]));
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assertThrowsInstanceOf(() => iter.next(), ReferenceError);
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4
js/src/jit-test/tests/arguments/genexpr-2.js
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4
js/src/jit-test/tests/arguments/genexpr-2.js
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@ -0,0 +1,4 @@
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// 'arguments' is lexically scoped in genexprs at toplevel.
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var arguments = 8;
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assertEq((arguments for (x of [1])).next(), 8);
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6
js/src/jit-test/tests/arguments/genexpr-3.js
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6
js/src/jit-test/tests/arguments/genexpr-3.js
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@ -0,0 +1,6 @@
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// 'arguments' is lexically scoped in genexpr in toplevel let-block.
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{
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let arguments = [];
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assertEq((arguments for (p in {a: 1})).next(), arguments);
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}
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7
js/src/jit-test/tests/arguments/genexpr-4.js
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7
js/src/jit-test/tests/arguments/genexpr-4.js
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@ -0,0 +1,7 @@
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// 'arguments' is lexically scoped in genexpr in function.
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function f() {
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assertEq((arguments for (x of [0])).next(),
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(arguments for (y of [1])).next());
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}
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f();
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8
js/src/jit-test/tests/arguments/genexpr-5.js
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8
js/src/jit-test/tests/arguments/genexpr-5.js
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@ -0,0 +1,8 @@
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// 'arguments' binding can be closed over and outlives the function activation.
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function f() {
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return (arguments for (x of [1]));
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}
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var args = f("ponies").next();
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assertEq(args[0], "ponies");
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12
js/src/jit-test/tests/arguments/genexpr-6.js
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12
js/src/jit-test/tests/arguments/genexpr-6.js
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@ -0,0 +1,12 @@
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// 'arguments' works in nested genexprs.
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function f() {
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return ((((((arguments for (u of [0]))
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for (v of [1]))
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for (w of [2]))
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for (x of [3]))
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for (y of [4]))
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for (z of [5]));
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}
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var args = f("ponies").next().next().next().next().next().next();
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assertEq(args[0], "ponies");
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10
js/src/jit-test/tests/basic/bug790629-1.js
Normal file
10
js/src/jit-test/tests/basic/bug790629-1.js
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@ -0,0 +1,10 @@
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// 'this' in generator-expression in strict-mode toplevel
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// is the same as global 'this'.
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"use strict";
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var it1 = (this for (x of [0]));
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assertEq(it1.next(), this);
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var it2 = (this for (x of (this for (y of (this for (z of [0]))))));
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assertEq(it2.next(), this);
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11
js/src/jit-test/tests/basic/bug790629-2.js
Normal file
11
js/src/jit-test/tests/basic/bug790629-2.js
Normal file
@ -0,0 +1,11 @@
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// 'this' in escaping generator-expression in a method
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// is the same as 'this' in the enclosing method.
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var obj = {
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f: function () {
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assertEq(this, obj);
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return (this for (x of [0]));
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}
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};
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assertEq(obj.f().next(), obj);
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js/src/jit-test/tests/basic/bug790629-3.js
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11
js/src/jit-test/tests/basic/bug790629-3.js
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@ -0,0 +1,11 @@
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// 'this' in escaping generator-expression in a method
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// is the same as 'this' in the enclosing method
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// even if the method does not otherwise use 'this'.
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var obj = {
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f: function () {
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return (this for (x of [0]));
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}
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};
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assertEq(obj.f().next(), obj);
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13
js/src/jit-test/tests/basic/bug790629-4.js
Normal file
13
js/src/jit-test/tests/basic/bug790629-4.js
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@ -0,0 +1,13 @@
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// 'this' in a generator-expression non-strict function produces the expected
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// object.
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Number.prototype.iters = function () {
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return [(this for (x of [0])),
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(this for (y of [0]))];
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};
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var [a, b] = (3).iters();
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var three = a.next();
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assertEq(Object.prototype.toString.call(three), '[object Number]');
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assertEq(+three, 3);
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assertEq(b.next(), three);
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@ -191,6 +191,18 @@ test('try {for (let x in eval("throw x")) {}} catch (e) {return e;}', undefined,
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test('try {for each (let x in x) {eval("throw x");}} catch (e) {return e;}', ['ponies'], undefined);
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test('for each (let {x: y, y: x} in [{x: x, y: x}]) {return y;}', undefined, undefined);
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// genexps
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test('return (i for (i in x)).next();', {ponies:true});
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test('return (eval("i") for (i in x)).next();', {ponies:true});
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test('return (eval("i") for (i in eval("x"))).next();', {ponies:true});
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test('try {return (eval("throw i") for (i in x)).next();} catch (e) {return e;}', {ponies:true});
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// array comprehension
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test('return [i for (i in x)][0];', {ponies:true});
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test('return [eval("i") for (i in x)][0];', {ponies:true});
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test('return [eval("i") for (i in eval("x"))][0];', {ponies:true});
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test('try {return [eval("throw i") for (i in x)][0];} catch (e) {return e;}', {ponies:true});
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// don't forget about switch craziness
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test('var y = 3;switch (function () {return eval("y");}()) {case 3:let y;return x;default:;}');
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test('switch (x) {case 3:let y;return 3;case 4:let z;return 4;default:return x;}');
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14
js/src/jit-test/tests/tenfourfox/legacy-generator.js
Normal file
14
js/src/jit-test/tests/tenfourfox/legacy-generator.js
Normal file
@ -0,0 +1,14 @@
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// array comprehensions
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var data = "abcdefg";
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var hexString = [
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data.charCodeAt(i) for (i in data) if (data.charCodeAt(i) < 100)
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].join(",");
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assertEq(hexString, "97,98,99");
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// generator comprehensions
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var it = [1, 2, 3, 5, 8, 10, 13];
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var w = (i*2 for (i of it) if (i & 1));
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assertEq(w.next(), 2);
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assertEq(w.next(), 6);
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assertEq(w.next(), 10);
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assertEq(w.next(), 26);
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30
js/src/tests/js1_8/regress-380237-02.js
Normal file
30
js/src/tests/js1_8/regress-380237-02.js
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@ -0,0 +1,30 @@
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/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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//-----------------------------------------------------------------------------
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var BUGNUMBER = 380237;
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var summary = 'Decompilation of generator expressions';
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var actual = '';
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var expect = '';
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//-----------------------------------------------------------------------------
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test();
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//-----------------------------------------------------------------------------
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function test()
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{
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enterFunc ('test');
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printBugNumber(BUGNUMBER);
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printStatus (summary);
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var f = function() { g = (d for (d in [0])); g.next(); };
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expect = 'function() { g = (d for (d in [0])); g.next(); }';
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actual = f + '';
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compareSource(expect, actual, summary);
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exitFunc ('test');
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}
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