X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Ftool.h;h=36d1be165b4f614a994d99ca08bcda4b37674ecd;hb=37ffa892c453a91f06d34068e239e1ba316d7700;hp=c302f3cffb432949706d4967a3ec18344e273738;hpb=e09cea0ffcef4ab5ea35c47c5b34237c44d0741f;p=builder.git

diff --git a/source/tool.h b/source/tool.h
index c302f3c..36d1be1 100644
--- a/source/tool.h
+++ b/source/tool.h
@@ -10,6 +10,10 @@ class Component;
 class Target;
 class Task;
 
+/**
+Base class for tools.  Tools are used to turn targets into other targets.
+Examples include compilers and linkers.
+*/
 class Tool
 {
 public:
@@ -40,4 +44,17 @@ public:
 	virtual Task *run(const Target &) const = 0;
 };
 
+/**
+Intermediate base class for tool facets.  For example, a linker may need to
+use different commands depending on whether C++ source files are present or
+not, but their presence can't be directly determined from the object files.
+*/
+class SubTool: public Tool
+{
+protected:
+	Tool &parent;
+
+	SubTool(Tool &);
+};
+
 #endif