1 // Copyright 2014 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_TEMPLATE_H_ 6 #define TOOLS_GN_TEMPLATE_H_ 7 8 #include <vector> 9 10 #include "base/basictypes.h" 11 #include "base/memory/ref_counted.h" 12 #include "base/memory/scoped_ptr.h" 13 14 class BlockNode; 15 class Err; 16 class FunctionCallNode; 17 class LocationRange; 18 class Scope; 19 class Value; 20 21 // Represents the information associated with a template() call in GN, which 22 // includes a closure and the code to run when the template is invoked. 23 // 24 // This class is immutable so we can reference it from multiple threads without 25 // locking. Normally, this will be assocated with a .gni file and then a 26 // reference will be taken by each .gn file that imports it. These files might 27 // execute the template in parallel. 28 class Template : public base::RefCountedThreadSafe<Template> { 29 public: 30 // Makes a new closure based on the given scope. 31 Template(const Scope* scope, const FunctionCallNode* def); 32 33 // Takes ownership of a previously-constructed closure. 34 Template(scoped_ptr<Scope> closure, const FunctionCallNode* def); 35 36 // Invoke the template. The values correspond to the state of the code 37 // invoking the template. 38 Value Invoke(Scope* scope, 39 const FunctionCallNode* invocation, 40 const std::vector<Value>& args, 41 BlockNode* block, 42 Err* err) const; 43 44 // Returns the location range where this template was defined. 45 LocationRange GetDefinitionRange() const; 46 47 private: 48 friend class base::RefCountedThreadSafe<Template>; 49 50 Template(); 51 ~Template(); 52 53 scoped_ptr<Scope> closure_; 54 const FunctionCallNode* definition_; 55 }; 56 57 #endif // TOOLS_GN_TEMPLATE_H_ 58
