[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 1362 matching lines @@
   kAllowLazy,
   kAllowNatives,
   kAllowHarmonyModules,
   kAllowHarmonyArrowFunctions,
   kAllowHarmonyClasses,
   kAllowHarmonyObjectLiterals,
   kAllowHarmonyRestParameters,
   kAllowHarmonySloppy,
   kAllowHarmonyUnicode,
   kAllowHarmonyComputedPropertyNames,
-  kAllowStrongMode
+  kAllowStrongMode,
+  kAllowHarmonySpreadCalls
 };
 
 
 enum ParserSyncTestResult {
   kSuccessOrError,
   kSuccess,
   kError
 };
 
 template <typename Traits>
 void SetParserFlags(i::ParserBase<Traits>* parser,
                     i::EnumSet<ParserFlag> flags) {
   parser->set_allow_lazy(flags.Contains(kAllowLazy));
   parser->set_allow_natives(flags.Contains(kAllowNatives));
   parser->set_allow_harmony_modules(flags.Contains(kAllowHarmonyModules));
   parser->set_allow_harmony_object_literals(
       flags.Contains(kAllowHarmonyObjectLiterals));
   parser->set_allow_harmony_arrow_functions(
       flags.Contains(kAllowHarmonyArrowFunctions));
   parser->set_allow_harmony_classes(flags.Contains(kAllowHarmonyClasses));
   parser->set_allow_harmony_rest_params(
       flags.Contains(kAllowHarmonyRestParameters));
+  parser->set_allow_harmony_spreadcalls(
+      flags.Contains(kAllowHarmonySpreadCalls));
   parser->set_allow_harmony_sloppy(flags.Contains(kAllowHarmonySloppy));
   parser->set_allow_harmony_unicode(flags.Contains(kAllowHarmonyUnicode));
   parser->set_allow_harmony_computed_property_names(
       flags.Contains(kAllowHarmonyComputedPropertyNames));
   parser->set_allow_strong_mode(flags.Contains(kAllowStrongMode));
 }
 
 
 void TestParserSyncWithFlags(i::Handle<i::String> source,
                              i::EnumSet<ParserFlag> flags,
@@ skipping 3681 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'", "...new Set([1, 2, 3]), 4",
+      "1, ...[2, 3], 4", "...Array(...[1,2,3,4])", "...NaN",
+      "0, 1, ...[2, 3, 4], 5, 6, 7, ...'89'",
+      "0, 1, ...[2, 3, 4], 5, 6, 7, ...'89', 10",
+      "...[0, 1, 2], 3, 4, 5, 6, ...'7', 8, 9",
+      "...[0, 1, 2], 3, 4, 5, 6, ...'7', 8, 9, ...[10]", 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 833 matching lines @@
     v8::Script::Compile(v8_str(script3));
     CHECK(try_catch2.HasCaught());
     v8::String::Utf8Value exception(try_catch2.Exception());
     CHECK_EQ(0,
              strcmp(
                  "ReferenceError: In strong mode, using an undeclared global "
                  "variable 'not_there3' is not allowed",
                  *exception));
   }
 }