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+// file : build2/cc/target.hxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
+// license : MIT; see accompanying LICENSE file
+
+#ifndef BUILD2_CC_TARGET_HXX
+#define BUILD2_CC_TARGET_HXX
+
+#include <build2/types.hxx>
+#include <build2/utility.hxx>
+
+#include <build2/target.hxx>
+
+namespace build2
+{
+ namespace cc
+ {
+ // This is an abstract base target for all c-common source files. We use
+ // this arrangement in rule matching to detect "unknown" (to this rule)
+ // source files that it cannot handle but should not ignore either. For
+ // example, a C link rule that sees a C++ source file.
+ //
+ class cc: public file
+ {
+ public:
+ using file::file;
+
+ public:
+ static const target_type static_type;
+ virtual const target_type& dynamic_type () const = 0;
+ };
+
+ // There is hardly a c-family compilation without a C header inclusion.
+ // As a result, this target type is registered for any c-family module.
+ //
+ class h: public file
+ {
+ public:
+ using file::file;
+
+ public:
+ static const target_type static_type;
+ virtual const target_type& dynamic_type () const {return static_type;}
+ };
+
+ // This one we define in cc but the target type is only registered by the
+ // c module. This way we can implement rule chaining without jumping
+ // through too many hoops (like resolving target type dynamically) but
+ // also without relaxing things too much (i.e., the user still won't be
+ // able to refer to c{} without loading the c module).
+ //
+ class c: public cc
+ {
+ public:
+ using cc::cc;
+
+ public:
+ static const target_type static_type;
+ virtual const target_type& dynamic_type () const {return static_type;}
+ };
+ }
+}
+
+#endif // BUILD2_CC_TARGET_HXX