[runtime] Replace %to_string_fun with %_ToString.

src/runtime.js

 // Copyright 2006-2008 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.
 
 // This files contains runtime support implemented in JavaScript.
 
 // CAUTION: Some of the functions specified in this file are called
 // directly from compiled code. These are the functions with names in
 // ALL CAPS. The compiled code passes the first argument in 'this'.
 
 
 // The following declarations are shared with other native JS files.
 // They are all declared at this one spot to avoid redeclaration errors.
 var $defaultString;
 var $NaN;
 var $nonNumberToNumber;
-var $nonStringToString;
 var $sameValue;
 var $sameValueZero;
 var $toInteger;
 var $toLength;
 var $toNumber;
 var $toPositiveInteger;
-var $toString;
 
 var harmony_tolength = false;
 
 (function(global, utils) {
 
 %CheckIsBootstrapping();
 
 var GlobalArray = global.Array;
 var GlobalBoolean = global.Boolean;
 var GlobalString = global.String;
 var isConcatSpreadableSymbol =
     utils.ImportNow("is_concat_spreadable_symbol");
 
 // ----------------------------------------------------------------------------
 
 /* -----------------------------
    - - -   H e l p e r s   - - -
    -----------------------------
 */
 
 function APPLY_PREPARE(args) {
   var length;
 
   // First check that the receiver is callable.
   if (!IS_CALLABLE(this)) {
-    throw %make_type_error(kApplyNonFunction, %to_string_fun(this),
-                           typeof this);
+    throw %make_type_error(kApplyNonFunction, TO_STRING(this), typeof this);
   }
 
   // First check whether length is a positive Smi and args is an
   // array. This is the fast case. If this fails, we do the slow case
   // that takes care of more eventualities.
   if (IS_ARRAY(args)) {
     length = args.length;
     if (%_IsSmi(length) && length >= 0 && length < kSafeArgumentsLength) {
       return length;
     }
@@ skipping 15 matching lines @@
   // stack. It is guaranteed to be a small integer at this point.
   return length;
 }
 
 
 function REFLECT_APPLY_PREPARE(args) {
   var length;
 
   // First check that the receiver is callable.
   if (!IS_CALLABLE(this)) {
-    throw %make_type_error(kApplyNonFunction, %to_string_fun(this),
-                           typeof this);
+    throw %make_type_error(kApplyNonFunction, TO_STRING(this), typeof this);
   }
 
   // First check whether length is a positive Smi and args is an
   // array. This is the fast case. If this fails, we do the slow case
   // that takes care of more eventualities.
   if (IS_ARRAY(args)) {
     length = args.length;
     if (%_IsSmi(length) && length >= 0 && length < kSafeArgumentsLength) {
       return length;
     }
@@ skipping 28 matching lines @@
   if (IS_ARRAY(args)) {
     length = args.length;
     if (%_IsSmi(length) && length >= 0 && length < kSafeArgumentsLength &&
         ctorOk && newTargetOk) {
       return length;
     }
   }
 
   if (!ctorOk) {
     if (!IS_CALLABLE(this)) {
-      throw %make_type_error(kCalledNonCallable, %to_string_fun(this));
+      throw %make_type_error(kCalledNonCallable, TO_STRING(this));
     } else {
-      throw %make_type_error(kNotConstructor, %to_string_fun(this));
+      throw %make_type_error(kNotConstructor, TO_STRING(this));
     }
   }
 
   if (!newTargetOk) {
     if (!IS_CALLABLE(newTarget)) {
-      throw %make_type_error(kCalledNonCallable, %to_string_fun(newTarget));
+      throw %make_type_error(kCalledNonCallable, TO_STRING(newTarget));
     } else {
-      throw %make_type_error(kNotConstructor, %to_string_fun(newTarget));
+      throw %make_type_error(kNotConstructor, TO_STRING(newTarget));
     }
   }
 
   if (!IS_SPEC_OBJECT(args)) {
     throw %make_type_error(kWrongArgs, "Reflect.construct");
   }
 
   length = %to_length_fun(args.length);
 
   // We can handle any number of apply arguments if the stack is
@@ skipping 55 matching lines @@
 // ECMA-262, section 9.8, page 35.
 function ToString(x) {
   if (IS_STRING(x)) return x;
   if (IS_NUMBER(x)) return %_NumberToString(x);
   if (IS_BOOLEAN(x)) return x ? 'true' : 'false';
   if (IS_UNDEFINED(x)) return 'undefined';
   // Types that can't be converted to string are caught in DefaultString.
   return (IS_NULL(x)) ? 'null' : ToString(DefaultString(x));
 }
 
-function NonStringToString(x) {
-  if (IS_NUMBER(x)) return %_NumberToString(x);
-  if (IS_BOOLEAN(x)) return x ? 'true' : 'false';
-  if (IS_UNDEFINED(x)) return 'undefined';
-  // Types that can't be converted to string are caught in DefaultString.
-  return (IS_NULL(x)) ? 'null' : ToString(DefaultString(x));
-}
-
 
 // ECMA-262, section 9.4, page 34.
 function ToInteger(x) {
   if (%_IsSmi(x)) return x;
   return %NumberToInteger(ToNumber(x));
 }
 
 
 // ES6, draft 08-24-14, section 7.1.15
 function ToLength(arg) {
@@ skipping 112 matching lines @@
 // that is cloned when running the code.  It is essential that the
 // boilerplate gets the right prototype.
 %FunctionSetPrototype(GlobalArray, new GlobalArray(0));
 
 // ----------------------------------------------------------------------------
 // Exports
 
 $defaultString = DefaultString;
 $NaN = %GetRootNaN();
 $nonNumberToNumber = NonNumberToNumber;
-$nonStringToString = NonStringToString;
 $sameValue = SameValue;
 $sameValueZero = SameValueZero;
 $toInteger = ToInteger;
 $toLength = ToLength;
 $toNumber = ToNumber;
 $toPositiveInteger = ToPositiveInteger;
-$toString = ToString;
 
 %InstallToContext([
   "apply_prepare_builtin", APPLY_PREPARE,
   "concat_iterable_to_array_builtin", CONCAT_ITERABLE_TO_ARRAY,
   "reflect_apply_prepare_builtin", REFLECT_APPLY_PREPARE,
   "reflect_construct_prepare_builtin", REFLECT_CONSTRUCT_PREPARE,
 ]);
 
 %InstallToContext([
   "concat_iterable_to_array", ConcatIterableToArray,
   "non_number_to_number", NonNumberToNumber,
-  "non_string_to_string", NonStringToString,
   "to_integer_fun", ToInteger,
   "to_length_fun", ToLength,
   "to_number_fun", ToNumber,
-  "to_string_fun", ToString,
 ]);
 
 utils.Export(function(to) {
   to.ToBoolean = ToBoolean;
   to.ToLength = ToLength;
   to.ToNumber = ToNumber;
   to.ToString = ToString;
 });
 
 })