1 // Copyright (c) 2013 The Chromium 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 TOOLS_GN_ITEM_H_ 6 #define TOOLS_GN_ITEM_H_ 7 8 #include <string> 9 10 #include "tools/gn/label.h" 11 12 class Config; 13 class ParseNode; 14 class Settings; 15 class Target; 16 class Toolchain; 17 18 // A named item (target, config, etc.) that participates in the dependency 19 // graph. 20 class Item { 21 public: 22 Item(const Settings* settings, const Label& label); 23 virtual ~Item(); 24 25 const Settings* settings() const { return settings_; } 26 27 // This is guaranteed to never change after construction so this can be 28 // accessed from any thread with no locking once the item is constructed. 29 const Label& label() const { return label_; } 30 31 const ParseNode* defined_from() const { return defined_from_; } 32 void set_defined_from(const ParseNode* df) { defined_from_ = df; } 33 34 // Manual RTTI. 35 virtual Config* AsConfig(); 36 virtual const Config* AsConfig() const; 37 virtual Target* AsTarget(); 38 virtual const Target* AsTarget() const; 39 virtual Toolchain* AsToolchain(); 40 virtual const Toolchain* AsToolchain() const; 41 42 // Returns a name like "target" or "config" for the type of item this is, to 43 // be used in logging and error messages. 44 std::string GetItemTypeName() const; 45 46 // Called when this item is resolved, meaning it and all of its dependents 47 // have no unresolved deps. 48 virtual void OnResolved() {} 49 50 private: 51 const Settings* settings_; 52 Label label_; 53 const ParseNode* defined_from_; 54 }; 55 56 #endif // TOOLS_GN_ITEM_H_ 57
