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      1 // Copyright 2011 the V8 project authors. All rights reserved.
      2 // Redistribution and use in source and binary forms, with or without
      3 // modification, are permitted provided that the following conditions are
      4 // met:
      5 //
      6 //     * Redistributions of source code must retain the above copyright
      7 //       notice, this list of conditions and the following disclaimer.
      8 //     * Redistributions in binary form must reproduce the above
      9 //       copyright notice, this list of conditions and the following
     10 //       disclaimer in the documentation and/or other materials provided
     11 //       with the distribution.
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     13 //       contributors may be used to endorse or promote products derived
     14 //       from this software without specific prior written permission.
     15 //
     16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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     23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 
     28 // Flags: --harmony-scoping
     29 
     30 // Test that we throw early syntax errors in harmony mode
     31 // when using an immutable binding in an assigment or with
     32 // prefix/postfix decrement/increment operators.
     33 // TODO(ES6): properly activate extended mode
     34 "use strict";
     35 
     36 
     37 // Function local const.
     38 function constDecl0(use) {
     39   return "(function() { const constvar = 1; " + use + "; });";
     40 }
     41 
     42 
     43 function constDecl1(use) {
     44   return "(function() { " + use + "; const constvar = 1; });";
     45 }
     46 
     47 
     48 // Function local const, assign from eval.
     49 function constDecl2(use) {
     50   use = "eval('(function() { " + use + " })')";
     51   return "(function() { const constvar = 1; " + use + "; })();";
     52 }
     53 
     54 
     55 function constDecl3(use) {
     56   use = "eval('(function() { " + use + " })')";
     57   return "(function() { " + use + "; const constvar = 1; })();";
     58 }
     59 
     60 
     61 // Block local const.
     62 function constDecl4(use) {
     63   return "(function() { { const constvar = 1; " + use + "; } });";
     64 }
     65 
     66 
     67 function constDecl5(use) {
     68   return "(function() { { " + use + "; const constvar = 1; } });";
     69 }
     70 
     71 
     72 // Block local const, assign from eval.
     73 function constDecl6(use) {
     74   use = "eval('(function() {" + use + "})')";
     75   return "(function() { { const constvar = 1; " + use + "; } })();";
     76 }
     77 
     78 
     79 function constDecl7(use) {
     80   use = "eval('(function() {" + use + "})')";
     81   return "(function() { { " + use + "; const constvar = 1; } })();";
     82 }
     83 
     84 
     85 // Function expression name.
     86 function constDecl8(use) {
     87   return "(function constvar() { " + use + "; });";
     88 }
     89 
     90 
     91 // Function expression name, assign from eval.
     92 function constDecl9(use) {
     93   use = "eval('(function(){" + use + "})')";
     94   return "(function constvar() { " + use + "; })();";
     95 }
     96 
     97 let decls = [ constDecl0,
     98               constDecl1,
     99               constDecl2,
    100               constDecl3,
    101               constDecl4,
    102               constDecl5,
    103               constDecl6,
    104               constDecl7,
    105               constDecl8,
    106               constDecl9
    107               ];
    108 let uses = [ 'constvar = 1;',
    109              'constvar += 1;',
    110              '++constvar;',
    111              'constvar++;'
    112              ];
    113 
    114 function Test(d,u) {
    115   'use strict';
    116   try {
    117     print(d(u));
    118     eval(d(u));
    119   } catch (e) {
    120     assertInstanceof(e, SyntaxError);
    121     assertTrue(e.toString().indexOf("Assignment to constant variable") >= 0);
    122     return;
    123   }
    124   assertUnreachable();
    125 }
    126 
    127 for (var d = 0; d < decls.length; ++d) {
    128   for (var u = 0; u < uses.length; ++u) {
    129     Test(decls[d], uses[u]);
    130   }
    131 }
    132