From 70317569c6dcd9809ed4a8c425777e653ec6ca08 Mon Sep 17 00:00:00 2001
From: Karen Arutyunov <karen@codesynthesis.com>
Date: Mon, 1 May 2017 18:24:31 +0300
Subject: Add hxx extension for headers

---
 build2/cc/target.hxx | 63 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 build2/cc/target.hxx

(limited to 'build2/cc/target.hxx')

diff --git a/build2/cc/target.hxx b/build2/cc/target.hxx
new file mode 100644
index 0000000..4c9e4cb
--- /dev/null
+++ b/build2/cc/target.hxx
@@ -0,0 +1,63 @@
+// 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
-- 
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