Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #ifndef V8_AST_MODULES_H_ |
| 6 | #define V8_AST_MODULES_H_ |
| 7 | |
| 8 | #include "src/zone.h" |
| 9 | |
| 10 | namespace v8 { |
| 11 | namespace internal { |
| 12 | |
| 13 | |
| 14 | class AstRawString; |
| 15 | |
| 16 | |
| 17 | class ModuleDescriptor : public ZoneObject { |
| 18 | public: |
| 19 | // --------------------------------------------------------------------------- |
| 20 | // Factory methods. |
| 21 | |
| 22 | static ModuleDescriptor* New(Zone* zone) { |
| 23 | return new (zone) ModuleDescriptor(zone); |
| 24 | } |
| 25 | |
| 26 | // --------------------------------------------------------------------------- |
| 27 | // Mutators. |
| 28 | |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 29 | // Add a name to the list of exports. If it already exists, that's an error. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 30 | void AddLocalExport(const AstRawString* export_name, |
| 31 | const AstRawString* local_name, Zone* zone, bool* ok); |
| 32 | |
| 33 | // Add module_specifier to the list of requested modules, |
| 34 | // if not already present. |
| 35 | void AddModuleRequest(const AstRawString* module_specifier, Zone* zone); |
| 36 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 37 | // Assign an index. |
| 38 | void Allocate(int index) { |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 39 | DCHECK_EQ(-1, index_); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 40 | index_ = index; |
| 41 | } |
| 42 | |
| 43 | // --------------------------------------------------------------------------- |
| 44 | // Accessors. |
| 45 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 46 | int Length() { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 47 | ZoneHashMap* exports = exports_; |
| 48 | return exports ? exports->occupancy() : 0; |
| 49 | } |
| 50 | |
| 51 | // The context slot in the hosting script context pointing to this module. |
| 52 | int Index() { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 53 | return index_; |
| 54 | } |
| 55 | |
| 56 | const AstRawString* LookupLocalExport(const AstRawString* export_name, |
| 57 | Zone* zone); |
| 58 | |
| 59 | const ZoneList<const AstRawString*>& requested_modules() const { |
| 60 | return requested_modules_; |
| 61 | } |
| 62 | |
| 63 | // --------------------------------------------------------------------------- |
| 64 | // Iterators. |
| 65 | |
| 66 | // Use like: |
| 67 | // for (auto it = descriptor->iterator(); !it.done(); it.Advance()) { |
| 68 | // ... it.name() ... |
| 69 | // } |
| 70 | class Iterator { |
| 71 | public: |
| 72 | bool done() const { return entry_ == NULL; } |
| 73 | const AstRawString* export_name() const { |
| 74 | DCHECK(!done()); |
| 75 | return static_cast<const AstRawString*>(entry_->key); |
| 76 | } |
| 77 | const AstRawString* local_name() const { |
| 78 | DCHECK(!done()); |
| 79 | return static_cast<const AstRawString*>(entry_->value); |
| 80 | } |
| 81 | void Advance() { entry_ = exports_->Next(entry_); } |
| 82 | |
| 83 | private: |
| 84 | friend class ModuleDescriptor; |
| 85 | explicit Iterator(const ZoneHashMap* exports) |
| 86 | : exports_(exports), entry_(exports ? exports->Start() : NULL) {} |
| 87 | |
| 88 | const ZoneHashMap* exports_; |
| 89 | ZoneHashMap::Entry* entry_; |
| 90 | }; |
| 91 | |
| 92 | Iterator iterator() const { return Iterator(this->exports_); } |
| 93 | |
| 94 | // --------------------------------------------------------------------------- |
| 95 | // Implementation. |
| 96 | private: |
| 97 | explicit ModuleDescriptor(Zone* zone) |
Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 98 | : exports_(NULL), requested_modules_(1, zone), index_(-1) {} |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 99 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 100 | ZoneHashMap* exports_; // Module exports and their types (allocated lazily) |
| 101 | ZoneList<const AstRawString*> requested_modules_; |
| 102 | int index_; |
| 103 | }; |
| 104 | |
| 105 | } // namespace internal |
| 106 | } // namespace v8 |
| 107 | |
| 108 | #endif // V8_AST_MODULES_H_ |