JavaScriptCore-7601.1.46.3.tar.gz

[apple/javascriptcore.git] / builtins / StringConstructor.js

diff --git a/builtins/StringConstructor.js b/builtins/StringConstructor.js
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+++ b/builtins/StringConstructor.js
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+/*
+ * Copyright (C) 2015 Yusuke Suzuki <utatane.tea@gmail.com>.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. 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 with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+function raw(template) {
+    "use strict";
+
+    if (template === null || template === undefined)
+        throw new @TypeError("String.raw requires template not be null or undefined");
+    var cookedSegments = @Object(template);
+
+    var rawValue = cookedSegments.raw;
+    if (rawValue === null || rawValue === undefined)
+        throw new @TypeError("String.raw requires template.raw not be null or undefined");
+    var rawSegments = @Object(rawValue);
+
+    var numberOfSubstitutions = arguments.length - 1;
+
+    var segmentCount = @toLength(rawSegments.length);
+
+    if (segmentCount <= 0)
+        return '';
+
+    var stringElements = '';
+    for (var i = 0; ; ++i) {
+        var segment = @toString(rawSegments[i]);
+        stringElements += segment;
+
+        if ((i + 1) === segmentCount)
+            return stringElements;
+
+        if (i < numberOfSubstitutions) {
+            var substitutionIndexInArguments = i + 1;
+            var next = @toString(arguments[substitutionIndexInArguments]);
+            stringElements += next;
+        }
+    }
+}