// 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. // Flags: --allow-natives-syntax --harmony-explicit-tailcalls // Flags: --harmony-do-expressions "use strict"; var SyntaxErrorTests = [ { msg: "Unexpected expression inside tail call", tests: [ { src: `()=>{ return continue foo ; }`, err: ` ^^^`, }, { src: `()=>{ return continue 42 ; }`, err: ` ^^`, }, { src: `()=>{ return continue new foo () ; }`, err: ` ^^^^^^^^^^`, }, { src: `()=>{ loop: return continue loop ; }`, err: ` ^^^^`, }, { src: `class A { foo() { return continue super.x ; } }`, err: ` ^^^^^^^`, }, { src: `()=>{ return continue this ; }`, err: ` ^^^^`, }, { src: `()=>{ return continue class A {} ; }`, err: ` ^^^^^^^^^^`, }, { src: `()=>{ return continue class A extends B {} ; }`, err: ` ^^^^^^^^^^^^^^^^^^^^`, }, { src: `()=>{ return continue function A() { } ; }`, err: ` ^^^^^^^^^^^^^^^^`, }, { src: `()=>{ return continue { a: b, c: d} ; }`, err: ` ^^^^^^^^^^^^^`, }, { src: `()=>{ return continue function* Gen() { yield 1; } ; }`, err: ` ^^^^^^^^^^^^^^^^^^^^^^^^^^^^`, }, { src: `function A() { return continue new.target ; }`, err: ` ^^^^^^^^^^`, }, { src: `()=>{ return continue () ; }`, err: ` ^^`, }, { src: `()=>{ return continue ( 42 ) ; }`, err: ` ^^^^^^`, }, { src: "()=>{ return continue `123 ${foo} 34lk` ; }", err: ` ^^^^^^^^^^^^^^^^^`, }, { src: `()=>{ return continue do { x ? foo() : bar() ; } }`, err: ` ^^^^^^^^^^^^^^^^^^^^^^^^^^`, }, ], }, { msg: "Tail call expression is not allowed here", tests: [ { src: `()=>{ return continue continue continue b() ; }`, err: ` ^^^^^^^^^^^^`, }, { src: `()=>{ return continue ( continue b() ) ; }`, err: ` ^^^^^^^^^^^^`, }, { src: `()=>{ return continue f() - a ; }`, err: ` ^^^^^^^^^^^^^`, }, { src: `()=>{ return b + continue f() ; }`, err: ` ^^^^^^^^^^^^^^`, }, { src: `()=>{ return 1, 2, 3, continue f() , 4 ; }`, err: ` ^^^^^^^^^^^^^`, }, { src: `()=>{ var x = continue f ( ) ; }`, err: ` ^^^^^^^^^^^^^^^`, }, { src: `()=>{ return continue f () ? 1 : 2 ; }`, err: ` ^^^^^^^^^^^^^`, }, { src: `()=>{ return (1, 2, 3, continue f()), 4; }`, err: ` ^^^^^^^^^^^^`, }, { src: `()=>{ return [1, 2, continue f() ] ; }`, err: ` ^^^^^^^^^^^^`, }, { src: `()=>{ return [1, 2, ... continue f() ] ; }`, err: ` ^^^^^^^^^^^^`, }, { src: `()=>{ return [1, 2, continue f(), 3 ] ; }`, err: ` ^^^^^^^^^^^^`, }, { src: "()=>{ return `123 ${a} ${ continue foo ( ) } 34lk` ; }", err: ` ^^^^^^^^^^^^^^^^`, }, { src: `()=>{ return g( 1, 2, continue f() ); }`, err: ` ^^^^^^^^^^^^`, }, { src: `()=>{ return continue f() || a; }`, err: ` ^^^^^^^^^^^^`, }, { src: `()=>{ return a || b || c || continue f() || d; }`, err: ` ^^^^^^^^^^^^`, }, { src: `()=>{ return a && b && c && continue f() && d; }`, err: ` ^^^^^^^^^^^^`, }, { src: `()=>{ return a && b || c && continue f() ? d : e; }`, err: ` ^^^^^^^^^^^^`, }, { src: `()=>{ return a ? b : c && continue f() && d || e; }`, err: ` ^^^^^^^^^^^^`, }, { src: `()=>{ return continue foo() instanceof bar ; }`, err: ` ^^^^^^^^^^^^^^`, }, { src: `()=>{ return bar instanceof continue foo() ; }`, err: ` ^^^^^^^^^^^^^^`, }, { src: `()=>{ return continue foo() in bar ; }`, err: ` ^^^^^^^^^^^^^^`, }, { src: `()=>{ return bar in continue foo() ; }`, err: ` ^^^^^^^^^^^^^^`, }, { src: `()=>{ function* G() { yield continue foo(); } }`, err: ` ^^^^^^^^^^^^^^`, }, { src: `()=>{ (1, 2, 3, continue f() ) => {} }`, err: ` ^^^^^^^^^^^^`, }, { src: `()=>{ (... continue f()) => {} }`, err: ` ^^^^^^^^^^^^`, }, { src: `()=>{ (a, b, c, ... continue f() ) => {} }`, err: ` ^^^^^^^^^^^^`, }, { src: `()=>{ return a <= continue f(); }`, err: ` ^^^^^^^^^^^^`, }, { src: `()=>{ return b > continue f(); }`, err: ` ^^^^^^^^^^^^`, }, { src: `()=>{ return a << continue f(); }`, err: ` ^^^^^^^^^^^^`, }, { src: `()=>{ return b >> continue f(); }`, err: ` ^^^^^^^^^^^^`, }, { src: `()=>{ return c >>> continue f(); }`, err: ` ^^^^^^^^^^^^`, }, { src: `()=>{ return continue f() = a ; }`, err: ` ^^^^^^^^^^^^`, }, { src: `()=>{ return a = continue f() ; }`, err: ` ^^^^^^^^^^^^`, }, { src: `()=>{ return a += continue f(); }`, err: ` ^^^^^^^^^^^^`, }, { src: `()=>{ return a ** continue f() ; }`, err: ` ^^^^^^^^^^^^`, }, { src: `()=>{ return delete continue foo() ; }`, err: ` ^^^^^^^^^^^^^^`, }, { src: `()=>{ typeof continue foo() ; }`, err: ` ^^^^^^^^^^^^^^`, }, { src: `()=>{ return ~ continue foo() ; }`, err: ` ^^^^^^^^^^^^^^`, }, { src: `()=>{ return void continue foo() ; }`, err: ` ^^^^^^^^^^^^^^`, }, { src: `()=>{ return !continue foo() ; }`, err: ` ^^^^^^^^^^^^^^`, }, { src: `()=>{ return -continue foo() ; }`, err: ` ^^^^^^^^^^^^^^`, }, { src: `()=>{ return +continue foo() ; }`, err: ` ^^^^^^^^^^^^^^`, }, { src: `()=>{ return ++ continue f( ) ; }`, err: ` ^^^^^^^^^^^^^`, }, { src: `()=>{ return continue f() ++; }`, err: ` ^^^^^^^^^^^^`, }, { src: `()=>{ return continue f() --; }`, err: ` ^^^^^^^^^^^^`, }, { src: `()=>{ return (continue foo()) () ; }`, err: ` ^^^^^^^^^^^^^^`, }, { src: `()=>{ for (var i = continue foo(); i < 10; i++) bar(); }`, err: ` ^^^^^^^^^^^^^^`, }, { src: `()=>{ for (var i = 0; i < continue foo(); i++) bar(); }`, err: ` ^^^^^^^^^^^^^^`, }, { src: `()=>{ for (var i = 0; i < 10; continue foo()) bar(); }`, err: ` ^^^^^^^^^^^^^^`, }, { src: `()=>{ if (continue foo()) bar(); }`, err: ` ^^^^^^^^^^^^^^`, }, { src: `()=>{ while (continue foo()) bar(); }`, err: ` ^^^^^^^^^^^^^^`, }, { src: `()=>{ do { smth; } while (continue foo()) ; }`, err: ` ^^^^^^^^^^^^^^`, }, { src: `()=>{ throw continue foo() ; }`, err: ` ^^^^^^^^^^^^^^`, }, { src: `()=>{ switch (continue foo()) { case 1: break; } ; }`, err: ` ^^^^^^^^^^^^^^`, }, { src: `()=>{ let x = continue foo() }`, err: ` ^^^^^^^^^^^^^^`, }, { src: `()=>{ const c = continue foo() }`, err: ` ^^^^^^^^^^^^^^^`, }, { src: `class A {}; class B extends A { constructor() { return continue foo () ; } }`, err: ` ^^^^^^^^^^^^^^^`, }, { src: `class A extends continue f () {}; }`, err: ` ^^^^^^^^^^^^^`, }, ], }, { msg: "Tail call expression in try block", tests: [ { src: `()=>{ try { return continue f ( ) ; } catch(e) {} }`, err: ` ^^^^^^^^^^^^^^^^`, }, { src: `()=>{ try { try { smth; } catch(e) { return continue f( ) ; } }`, err: ` ^^^^^^^^^^^^^^`, }, { src: `()=>{ try { try { smth; } catch(e) { return continue f( ) ; } } finally { bla; } }`, err: ` ^^^^^^^^^^^^^^`, }, ], }, { msg: "Tail call expression in catch block when finally block is also present", tests: [ { src: `()=>{ try { smth; } catch(e) { return continue f ( ) ; } finally { blah; } }`, err: ` ^^^^^^^^^^^^^^^^`, }, { src: `()=>{ try { smth; } catch(e) { try { smth; } catch (e) { return continue f ( ) ; } } finally { blah; } }`, err: ` ^^^^^^^^^^^^^^^^`, }, ], }, { msg: "Tail call expression in for-in/of body", tests: [ { src: `()=>{ for (var v in {a:0}) { return continue foo () ; } }`, err: ` ^^^^^^^^^^^^^^^^`, }, { src: `()=>{ for (var v of [1, 2, 3]) { return continue foo () ; } }`, err: ` ^^^^^^^^^^^^^^^^`, }, ], }, { msg: "Tail call of a direct eval is not allowed", tests: [ { src: `()=>{ return continue eval(" foo () " ) ; }`, err: ` ^^^^^^^^^^^^^^^^^`, }, { src: `()=>{ return a || continue eval("", 1, 2) ; }`, err: ` ^^^^^^^^^^^^^^`, }, { src: `()=>{ return a, continue eval ( ) ; }`, err: ` ^^^^^^^^^`, }, { src: `()=> a, continue eval ( ) ; `, err: ` ^^^^^^^^^`, }, { src: `()=> a || continue eval (' ' ) ; `, err: ` ^^^^^^^^^^^^`, }, ], }, { msg: "Undefined label 'foo'", tests: [ { src: `()=>{ continue foo () ; }`, err: ` ^^^`, }, ], }, ]; // Should parse successfully. var NoErrorTests = [ `()=>{ return continue a.b.c.foo () ; }`, `()=>{ return continue a().b.c().d.foo () ; }`, `()=>{ return continue foo (1)(2)(3, 4) ; }`, `()=>{ return continue (0, eval)(); }`, `()=>{ return ( continue b() ) ; }`, "()=>{ return continue bar`ab cd ef` ; }", "()=>{ return continue bar`ab ${cd} ef` ; }", `()=>{ return a || continue f() ; }`, `()=>{ return a && continue f() ; }`, `()=>{ return a , continue f() ; }`, `()=>{ function* G() { return continue foo(); } }`, `()=>{ class A { foo() { return continue super.f() ; } } }`, `()=>{ function B() { return continue new.target() ; } }`, `()=>{ return continue do { x ? foo() : bar() ; }() }`, `()=>{ return continue (do { x ? foo() : bar() ; })() }`, `()=>{ return do { 1, continue foo() } }`, `()=>{ return do { x ? continue foo() : y } }`, `()=>{ return a || (b && continue c()); }`, `()=>{ return a && (b || continue c()); }`, `()=>{ return a || (b ? c : continue d()); }`, `()=>{ return 1, 2, 3, a || (b ? c : continue d()); }`, `()=> continue (foo ()) ;`, `()=> a || continue foo () ;`, `()=> a && continue foo () ;`, `()=> a ? continue foo () : b;`, ]; (function() { for (var test_set of SyntaxErrorTests) { var expected_message = "SyntaxError: " + test_set.msg; for (var test of test_set.tests) { var passed = true; var e = null; try { eval(test.src); } catch (ee) { e = ee; } print("======================================="); print("Expected | " + expected_message); print("Source | " + test.src); print(" | " + test.err); if (e === null) { print("FAILED"); throw new Error("SyntaxError was not thrown"); } var details = %GetExceptionDetails(e); if (details.start_pos == undefined || details.end_pos == undefined) { throw new Error("Bad message object returned"); } var underline = " ".repeat(details.start_pos) + "^".repeat(details.end_pos - details.start_pos); var passed = expected_message === e.toString() && test.err === underline; if (passed) { print("PASSED"); print(); } else { print("---------------------------------------"); print("Actual | " + e); print("Source | " + test.src); print(" | " + underline); print("FAILED"); throw new Error("Test failed"); } } } })(); (function() { for (var src of NoErrorTests) { print("======================================="); print("Source | " + src); src = `"use strict"; ` + src; Realm.eval(0, src); print("PASSED"); print(); } })();