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 #include "tools/gn/visibility.h" 12 13 class Config; 14 class ParseNode; 15 class Settings; 16 class Target; 17 class Toolchain; 18 19 // A named item (target, config, etc.) that participates in the dependency 20 // graph. 21 class Item { 22 public: 23 Item(const Settings* settings, const Label& label); 24 virtual ~Item(); 25 26 const Settings* settings() const { return settings_; } 27 28 // This is guaranteed to never change after construction so this can be 29 // accessed from any thread with no locking once the item is constructed. 30 const Label& label() const { return label_; } 31 32 const ParseNode* defined_from() const { return defined_from_; } 33 void set_defined_from(const ParseNode* df) { defined_from_ = df; } 34 35 Visibility& visibility() { return visibility_; } 36 const Visibility& visibility() const { return visibility_; } 37 38 // Manual RTTI. 39 virtual Config* AsConfig(); 40 virtual const Config* AsConfig() const; 41 virtual Target* AsTarget(); 42 virtual const Target* AsTarget() const; 43 virtual Toolchain* AsToolchain(); 44 virtual const Toolchain* AsToolchain() const; 45 46 // Returns a name like "target" or "config" for the type of item this is, to 47 // be used in logging and error messages. 48 std::string GetItemTypeName() const; 49 50 // Called when this item is resolved, meaning it and all of its dependents 51 // have no unresolved deps. Returns true on success. Sets the error and 52 // returns false on failure. 53 virtual bool OnResolved(Err* err); 54 55 private: 56 const Settings* settings_; 57 Label label_; 58 const ParseNode* defined_from_; 59 60 Visibility visibility_; 61 }; 62 63 #endif // TOOLS_GN_ITEM_H_ 64
