[es6] implement spread calls

test/cctest/test-parsing.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1370 matching lines @@
   kAllowHarmonyModules,
   kAllowHarmonyNumericLiterals,
   kAllowHarmonyArrowFunctions,
   kAllowHarmonyClasses,
   kAllowHarmonyObjectLiterals,
   kAllowHarmonyRestParameters,
   kAllowHarmonyTemplates,
   kAllowHarmonySloppy,
   kAllowHarmonyUnicode,
   kAllowHarmonyComputedPropertyNames,
-  kAllowStrongMode
+  kAllowStrongMode,
+  kAllowHarmonySpreadCalls
 };
 
 
 enum ParserSyncTestResult {
   kSuccessOrError,
   kSuccess,
   kError
 };
 
 template <typename Traits>
@@ skipping 3573 matching lines @@
 
   static const ParserFlag always_flags[] = {kAllowHarmonyRestParameters};
 
   // In strict mode, the error is using "eval" or "arguments" as parameter names
   // In sloppy mode, the error is that eval / arguments are duplicated
   RunParserSyncTest(context_data, data, kError, NULL, 0, always_flags,
                     arraysize(always_flags));
 }
 
 
+TEST(SpreadCall) {
+  const char* context_data[][2] = {{"function fn() { 'use strict';} fn(", ");"},
+                                   {"function fn() {} fn(", ");"},
+                                   {NULL, NULL}};
+
+  const char* data[] = {
+      "...([1, 2, 3])",
+      "...'123', ...'456'",

[rossberg, 2015/02/24 16:22:47]

Have some more tests with spreads interleaved with non-spreads.

+      "...new Set([1, 2, 3]), 4",
+      "1, ...[2, 3], 4",
+      "...Array(...[1,2,3,4])",
+      "...NaN",
+      NULL};
+
+  static const ParserFlag always_flags[] = {kAllowHarmonySpreadCalls};
+
+  RunParserSyncTest(context_data, data, kSuccess, NULL, 0, always_flags,
+                    arraysize(always_flags));
+}
+
+
+TEST(SpreadCallErrors) {
+  const char* context_data[][2] = {{"function fn() { 'use strict';} fn(", ");"},
+                                   {"function fn() {} fn(", ");"},
+                                   {NULL, NULL}};
+
+  const char* data[] = {
+      "(...[1, 2, 3])",
+      "......[1,2,3]",
+      NULL};
+
+  static const ParserFlag always_flags[] = {kAllowHarmonySpreadCalls};
+
+  RunParserSyncTest(context_data, data, kError, NULL, 0, always_flags,
+                    arraysize(always_flags));
+}
+
+
+TEST(BadRestSpread) {
+  const char* context_data[][2] = {{"function fn() { 'use strict';", "} fn();"},
+                                   {"function fn() { ", "} fn();" },
+                                   {NULL, NULL}};
+  const char* data[] = {
+    "return ...[1,2,3];",
+    "var ...x = [1,2,3];",
+    "var [...x,] = [1,2,3];",
+    "var [...x, y] = [1,2,3];",
+    "var {...x} = [1,2,3];",
+    "var { x } = {x: ...[1,2,3]}",
+    NULL};
+  RunParserSyncTest(context_data, data, kError, NULL, 0, NULL, 0);
+}
+
+
 TEST(LexicalScopingSloppyMode) {
   const char* context_data[][2] = {
       {"", ""},
       {"function f() {", "}"},
       {"{", "}"},
       {NULL, NULL}};
   const char* bad_data[] = {
     "let x = 1;",
     "for(let x = 1;;){}",
     "for(let x of []){}",
@@ skipping 451 matching lines @@
       "b, a, a",
       "a, b, c, c",
       "a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, w",
       NULL};
 
   static const ParserFlag always_flags[] = { kAllowStrongMode };
   RunParserSyncTest(strict_context_data, data, kError, NULL, 0, always_flags,
                     arraysize(always_flags));
   RunParserSyncTest(sloppy_context_data, data, kSuccess, NULL, 0, NULL, 0);
 }