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1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 'use strict'; | 5 'use strict'; |
6 | 6 |
7 function GetTemplateCallSite(siteObj, rawStrings) { | 7 var callSiteCache = new $Map; |
8 // TODO(caitp): ensure same template callsite is used for subsequent tag calls | 8 |
| 9 function SameCallSiteElements(rawStrings, other) { |
| 10 var length = rawStrings.length; |
| 11 var other = other.raw; |
| 12 |
| 13 if (length !== other.length) return false; |
| 14 |
| 15 for (var i = 0; i < length; ++i) { |
| 16 if (rawStrings[i] !== other[i]) return false; |
| 17 } |
| 18 |
| 19 return true; |
| 20 } |
| 21 |
| 22 |
| 23 function GetCachedCallSite(siteObj, hash) { |
| 24 var obj = %MapGet(callSiteCache, hash); |
| 25 |
| 26 if (IS_UNDEFINED(obj)) return; |
| 27 |
| 28 var length = obj.length; |
| 29 for (var i = 0; i < length; ++i) { |
| 30 if (SameCallSiteElements(siteObj, obj[i])) return obj[i]; |
| 31 } |
| 32 } |
| 33 |
| 34 |
| 35 function SetCachedCallSite(siteObj, hash) { |
| 36 var obj = %MapGet(callSiteCache, hash); |
| 37 var array; |
| 38 |
| 39 if (IS_UNDEFINED(obj)) { |
| 40 array = new InternalArray(1); |
| 41 array[0] = siteObj; |
| 42 %MapSet(callSiteCache, hash, array); |
| 43 } else { |
| 44 obj.push(siteObj); |
| 45 } |
| 46 |
| 47 return siteObj; |
| 48 } |
| 49 |
| 50 |
| 51 function GetTemplateCallSite(siteObj, rawStrings, hash) { |
| 52 var cached = GetCachedCallSite(rawStrings, hash); |
| 53 |
| 54 if (!IS_UNDEFINED(cached)) return cached; |
9 | 55 |
10 %AddNamedProperty(siteObj, "raw", %ObjectFreeze(rawStrings), | 56 %AddNamedProperty(siteObj, "raw", %ObjectFreeze(rawStrings), |
11 READ_ONLY | DONT_ENUM | DONT_DELETE); | 57 READ_ONLY | DONT_ENUM | DONT_DELETE); |
12 | 58 |
13 return %ObjectFreeze(siteObj); | 59 return SetCachedCallSite(%ObjectFreeze(siteObj), hash); |
14 } | 60 } |
15 | 61 |
16 | 62 |
17 // ES6 Draft 10-14-2014, section 21.1.2.4 | 63 // ES6 Draft 10-14-2014, section 21.1.2.4 |
18 function StringRaw(callSite) { | 64 function StringRaw(callSite) { |
19 // TODO(caitp): Use rest parameters when implemented | 65 // TODO(caitp): Use rest parameters when implemented |
20 var numberOfSubstitutions = %_ArgumentsLength(); | 66 var numberOfSubstitutions = %_ArgumentsLength(); |
21 var cooked = ToObject(callSite); | 67 var cooked = ToObject(callSite); |
22 var raw = ToObject(cooked.raw); | 68 var raw = ToObject(cooked.raw); |
23 var literalSegments = ToLength(raw.length); | 69 var literalSegments = ToLength(raw.length); |
(...skipping 15 matching lines...) Expand all Loading... |
39 function ExtendStringForTemplates() { | 85 function ExtendStringForTemplates() { |
40 %CheckIsBootstrapping(); | 86 %CheckIsBootstrapping(); |
41 | 87 |
42 // Set up the non-enumerable functions on the String object. | 88 // Set up the non-enumerable functions on the String object. |
43 InstallFunctions($String, DONT_ENUM, $Array( | 89 InstallFunctions($String, DONT_ENUM, $Array( |
44 "raw", StringRaw | 90 "raw", StringRaw |
45 )); | 91 )); |
46 } | 92 } |
47 | 93 |
48 ExtendStringForTemplates(); | 94 ExtendStringForTemplates(); |
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