ES6: Implement Object.setPrototypeOf

src/string.js

 // 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 43 matching lines @@
 function StringValueOf() {
   if (!IS_STRING(this) && !IS_STRING_WRAPPER(this)) {
     throw new $TypeError('String.prototype.valueOf is not generic');
   }
   return %_ValueOf(this);
 }
 
 
 // ECMA-262, section 15.5.4.4
 function StringCharAt(pos) {
-  if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) {
-    throw MakeTypeError("called_on_null_or_undefined",
-                        ["String.prototype.charAt"]);
-  }
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.charAt");
+
   var result = %_StringCharAt(this, pos);
   if (%_IsSmi(result)) {
     result = %_StringCharAt(TO_STRING_INLINE(this), TO_INTEGER(pos));
   }
   return result;
 }
 
 
 // ECMA-262 section 15.5.4.5
 function StringCharCodeAt(pos) {
-  if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) {
-    throw MakeTypeError("called_on_null_or_undefined",
-                        ["String.prototype.charCodeAt"]);
-  }
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.charCodeAt");
+
   var result = %_StringCharCodeAt(this, pos);
   if (!%_IsSmi(result)) {
     result = %_StringCharCodeAt(TO_STRING_INLINE(this), TO_INTEGER(pos));
   }
   return result;
 }
 
 
 // ECMA-262, section 15.5.4.6
 function StringConcat() {
-  if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) {
-    throw MakeTypeError("called_on_null_or_undefined",
-                        ["String.prototype.concat"]);
-  }
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.concat");
+
   var len = %_ArgumentsLength();
   var this_as_string = TO_STRING_INLINE(this);
   if (len === 1) {
     return this_as_string + %_Arguments(0);
   }
   var parts = new InternalArray(len + 1);
   parts[0] = this_as_string;
   for (var i = 0; i < len; i++) {
     var part = %_Arguments(i);
     parts[i + 1] = TO_STRING_INLINE(part);
   }
   return %StringBuilderConcat(parts, len + 1, "");
 }
 
 // Match ES3 and Safari
 %FunctionSetLength(StringConcat, 1);
 
 
 // ECMA-262 section 15.5.4.7
 function StringIndexOf(pattern /* position */) {  // length == 1
-  if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) {
-    throw MakeTypeError("called_on_null_or_undefined",
-                        ["String.prototype.indexOf"]);
-  }
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.indexOf");
+
   var subject = TO_STRING_INLINE(this);
   pattern = TO_STRING_INLINE(pattern);
   var index = 0;
   if (%_ArgumentsLength() > 1) {
     index = %_Arguments(1);  // position
     index = TO_INTEGER(index);
     if (index < 0) index = 0;
     if (index > subject.length) index = subject.length;
   }
   return %StringIndexOf(subject, pattern, index);
 }
 
 
 // ECMA-262 section 15.5.4.8
 function StringLastIndexOf(pat /* position */) {  // length == 1
-  if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) {
-    throw MakeTypeError("called_on_null_or_undefined",
-                        ["String.prototype.lastIndexOf"]);
-  }
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.lastIndexOf");
+
   var sub = TO_STRING_INLINE(this);
   var subLength = sub.length;
   var pat = TO_STRING_INLINE(pat);
   var patLength = pat.length;
   var index = subLength - patLength;
   if (%_ArgumentsLength() > 1) {
     var position = ToNumber(%_Arguments(1));
     if (!NUMBER_IS_NAN(position)) {
       position = TO_INTEGER(position);
       if (position < 0) {
         position = 0;
       }
       if (position + patLength < subLength) {
         index = position;
       }
     }
   }
   if (index < 0) {
     return -1;
   }
   return %StringLastIndexOf(sub, pat, index);
 }
 
 
 // ECMA-262 section 15.5.4.9
 //
 // This function is implementation specific.  For now, we do not
 // do anything locale specific.
 function StringLocaleCompare(other) {
-  if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) {
-    throw MakeTypeError("called_on_null_or_undefined",
-                        ["String.prototype.localeCompare"]);
-  }
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.localeCompare");
+
   return %StringLocaleCompare(TO_STRING_INLINE(this),
                               TO_STRING_INLINE(other));
 }
 
 
 // ECMA-262 section 15.5.4.10
 function StringMatch(regexp) {
-  if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) {
-    throw MakeTypeError("called_on_null_or_undefined",
-                        ["String.prototype.match"]);
-  }
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.match");
+
   var subject = TO_STRING_INLINE(this);
   if (IS_REGEXP(regexp)) {
     // Emulate RegExp.prototype.exec's side effect in step 5, even though
     // value is discarded.
     var lastIndex = regexp.lastIndex;
     TO_INTEGER_FOR_SIDE_EFFECT(lastIndex);
     if (!regexp.global) return RegExpExecNoTests(regexp, subject, 0);
     %_Log('regexp', 'regexp-match,%0S,%1r', [subject, regexp]);
     // lastMatchInfo is defined in regexp.js.
     var result = %StringMatch(subject, regexp, lastMatchInfo);
@@ skipping 10 matching lines @@
 // This has the same size as the lastMatchInfo array, and can be used for
 // functions that expect that structure to be returned.  It is used when the
 // needle is a string rather than a regexp.  In this case we can't update
 // lastMatchArray without erroneously affecting the properties on the global
 // RegExp object.
 var reusableMatchInfo = [2, "", "", -1, -1];
 
 
 // ECMA-262, section 15.5.4.11
 function StringReplace(search, replace) {
-  if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) {
-    throw MakeTypeError("called_on_null_or_undefined",
-                        ["String.prototype.replace"]);
-  }
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.replace");
+
   var subject = TO_STRING_INLINE(this);
 
   // Decision tree for dispatch
   // .. regexp search
   // .... string replace
   // ...... non-global search
   // ........ empty string replace
   // ........ non-empty string replace (with $-expansion)
   // ...... global search
   // ........ no need to circumvent last match info override
@@ skipping 309 matching lines @@
 
   result += replacement;  // The add method converts to string if necessary.
   // Can't use matchInfo any more from here, since the function could
   // overwrite it.
   return result + %_SubString(subject, endOfMatch, subject.length);
 }
 
 
 // ECMA-262 section 15.5.4.12
 function StringSearch(re) {
-  if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) {
-    throw MakeTypeError("called_on_null_or_undefined",
-                        ["String.prototype.search"]);
-  }
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.search");
+
   var regexp;
   if (IS_STRING(re)) {
     regexp = %_GetFromCache(STRING_TO_REGEXP_CACHE_ID, re);
   } else if (IS_REGEXP(re)) {
     regexp = re;
   } else {
     regexp = new $RegExp(re);
   }
   var match = DoRegExpExec(regexp, TO_STRING_INLINE(this), 0);
   if (match) {
     return match[CAPTURE0];
   }
   return -1;
 }
 
 
 // ECMA-262 section 15.5.4.13
 function StringSlice(start, end) {
-  if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) {
-    throw MakeTypeError("called_on_null_or_undefined",
-                        ["String.prototype.slice"]);
-  }
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.slice");
+
   var s = TO_STRING_INLINE(this);
   var s_len = s.length;
   var start_i = TO_INTEGER(start);
   var end_i = s_len;
   if (!IS_UNDEFINED(end)) {
     end_i = TO_INTEGER(end);
   }
 
   if (start_i < 0) {
     start_i += s_len;
@@ skipping 20 matching lines @@
   if (end_i <= start_i) {
     return '';
   }
 
   return %_SubString(s, start_i, end_i);
 }
 
 
 // ECMA-262 section 15.5.4.14
 function StringSplit(separator, limit) {
-  if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) {
-    throw MakeTypeError("called_on_null_or_undefined",
-                        ["String.prototype.split"]);
-  }
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.split");
+
   var subject = TO_STRING_INLINE(this);
   limit = (IS_UNDEFINED(limit)) ? 0xffffffff : TO_UINT32(limit);
 
   var length = subject.length;
   if (!IS_REGEXP(separator)) {
     var separator_string = TO_STRING_INLINE(separator);
 
     if (limit === 0) return [];
 
     // ECMA-262 says that if separator is undefined, the result should
@@ skipping 76 matching lines @@
     }
 
     startIndex = currentIndex = endIndex;
   }
   return result;
 }
 
 
 // ECMA-262 section 15.5.4.15
 function StringSubstring(start, end) {
-  if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) {
-    throw MakeTypeError("called_on_null_or_undefined",
-                        ["String.prototype.subString"]);
-  }
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.subString");
+
   var s = TO_STRING_INLINE(this);
   var s_len = s.length;
 
   var start_i = TO_INTEGER(start);
   if (start_i < 0) {
     start_i = 0;
   } else if (start_i > s_len) {
     start_i = s_len;
   }
 
@@ skipping 11 matching lines @@
       }
     }
   }
 
   return %_SubString(s, start_i, end_i);
 }
 
 
 // This is not a part of ECMA-262.
 function StringSubstr(start, n) {
-  if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) {
-    throw MakeTypeError("called_on_null_or_undefined",
-                        ["String.prototype.substr"]);
-  }
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.substr");
+
   var s = TO_STRING_INLINE(this);
   var len;
 
   // Correct n: If not given, set to string length; if explicitly
   // set to undefined, zero, or negative, returns empty string.
   if (IS_UNDEFINED(n)) {
     len = s.length;
   } else {
     len = TO_INTEGER(n);
     if (len <= 0) return '';
@@ skipping 18 matching lines @@
 
   var end = start + len;
   if (end > s.length) end = s.length;
 
   return %_SubString(s, start, end);
 }
 
 
 // ECMA-262, 15.5.4.16
 function StringToLowerCase() {
-  if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) {
-    throw MakeTypeError("called_on_null_or_undefined",
-                        ["String.prototype.toLowerCase"]);
-  }
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.toLowerCase");
+
   return %StringToLowerCase(TO_STRING_INLINE(this));
 }
 
 
 // ECMA-262, 15.5.4.17
 function StringToLocaleLowerCase() {
-  if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) {
-    throw MakeTypeError("called_on_null_or_undefined",
-                        ["String.prototype.toLocaleLowerCase"]);
-  }
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.toLocaleLowerCase");
+
   return %StringToLowerCase(TO_STRING_INLINE(this));
 }
 
 
 // ECMA-262, 15.5.4.18
 function StringToUpperCase() {
-  if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) {
-    throw MakeTypeError("called_on_null_or_undefined",
-                        ["String.prototype.toUpperCase"]);
-  }
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.toUpperCase");
+
   return %StringToUpperCase(TO_STRING_INLINE(this));
 }
 
 
 // ECMA-262, 15.5.4.19
 function StringToLocaleUpperCase() {
-  if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) {
-    throw MakeTypeError("called_on_null_or_undefined",
-                        ["String.prototype.toLocaleUpperCase"]);
-  }
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.toLocaleUpperCase");
+
   return %StringToUpperCase(TO_STRING_INLINE(this));
 }
 
 // ES5, 15.5.4.20
 function StringTrim() {
-  if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) {
-    throw MakeTypeError("called_on_null_or_undefined",
-                        ["String.prototype.trim"]);
-  }
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.trim");
+
   return %StringTrim(TO_STRING_INLINE(this), true, true);
 }
 
 function StringTrimLeft() {
-  if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) {
-    throw MakeTypeError("called_on_null_or_undefined",
-                        ["String.prototype.trimLeft"]);
-  }
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.trimLeft");
+
   return %StringTrim(TO_STRING_INLINE(this), true, false);
 }
 
 function StringTrimRight() {
-  if (IS_NULL_OR_UNDEFINED(this) && !IS_UNDETECTABLE(this)) {
-    throw MakeTypeError("called_on_null_or_undefined",
-                        ["String.prototype.trimRight"]);
-  }
+  CHECK_OBJECT_COERCIBLE(this, "String.prototype.trimRight");
+
   return %StringTrim(TO_STRING_INLINE(this), false, true);
 }
 
 
 // ECMA-262, section 15.5.3.2
 function StringFromCharCode(code) {
   var n = %_ArgumentsLength();
   if (n == 1) {
     if (!%_IsSmi(code)) code = ToNumber(code);
     return %_StringCharFromCode(code & 0xffff);
@@ skipping 147 matching lines @@
     "fixed", StringFixed,
     "italics", StringItalics,
     "small", StringSmall,
     "strike", StringStrike,
     "sub", StringSub,
     "sup", StringSup
   ));
 }
 
 SetUpString();