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Unified Diff: tools/gn/item.h

Issue 21114002: Add initial prototype for the GN meta-buildsystem. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: add owners and readme Created 7 years, 5 months ago
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Index: tools/gn/item.h
diff --git a/tools/gn/item.h b/tools/gn/item.h
new file mode 100644
index 0000000000000000000000000000000000000000..aa715442e3528f39fe7e9e1a6c833e899f37ef5f
--- /dev/null
+++ b/tools/gn/item.h
@@ -0,0 +1,45 @@
+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef TOOLS_GN_ITEM_H_
+#define TOOLS_GN_ITEM_H_
+
+#include <string>
+
+#include "tools/gn/label.h"
+
+class Config;
+class Target;
+class Toolchain;
+
+// A named item (target, config, etc.) that participates in the dependency
+// graph.
+class Item {
+ public:
+ Item(const Label& label);
+ virtual ~Item();
+
+ const Label& label() const { return label_; }
+
+ // Manual RTTI.
+ virtual Config* AsConfig();
+ virtual const Config* AsConfig() const;
+ virtual Target* AsTarget();
+ virtual const Target* AsTarget() const;
+ virtual Toolchain* AsToolchain();
+ virtual const Toolchain* AsToolchain() const;
+
+ // Returns a name like "target" or "config" for the type of item this is, to
+ // be used in logging and error messages.
+ std::string GetItemTypeName() const;
+
+ // Called when this item is resolved, meaning it and all of its dependents
+ // have no unresolved deps.
+ virtual void OnResolved() {}
+
+ private:
+ Label label_;
+};
+
+#endif // TOOLS_GN_ITEM_H_
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