Get rid of action rule override semantics

Instead we now have two more or less separate match states for outer and
inner parts of an action.

1 files changed, 77 insertions, 0 deletions

diff --git a/build2/cc/install-rule.hxx b/build2/cc/install-rule.hxx
new file mode 100644
index 0000000..ac2f93a
--- /dev/null
+++ b/build2/cc/install-rule.hxx
@@ -0,0 +1,77 @@
+// file      : build2/cc/install-rule.hxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#ifndef BUILD2_CC_INSTALL_RULE_HXX
+#define BUILD2_CC_INSTALL_RULE_HXX
+
+#include <build2/types.hxx>
+#include <build2/utility.hxx>
+
+#include <build2/install/rule.hxx>
+
+#include <build2/cc/types.hxx>
+#include <build2/cc/common.hxx>
+
+namespace build2
+{
+  namespace cc
+  {
+    class link_rule;
+
+    // Installation rule for exe{} and lib*{}. Here we do:
+    //
+    // 1. Signal to the link rule that this is update for install.
+    //
+    // 2. Additional filtering of prerequisites (e.g., headers of an exe{}).
+    //
+    // 3. Extra un/installation (e.g., libs{} symlinks).
+    //
+    class install_rule: public install::file_rule, virtual common
+    {
+    public:
+      install_rule (data&&, const link_rule&);
+
+      virtual const target*
+      filter (action, const target&, prerequisite_member) const override;
+
+      virtual bool
+      match (action, target&, const string&) const override;
+
+      virtual recipe
+      apply (action, target&) const override;
+
+      virtual bool
+      install_extra (const file&, const install_dir&) const override;
+
+      virtual bool
+      uninstall_extra (const file&, const install_dir&) const override;
+
+    private:
+      const link_rule& link_;
+    };
+
+    // Installation rule for libu*{}.
+    //
+    // While libu*{} themselves are not installable, we need to see through
+    // them in case they depend on stuff that we need to install (e.g.,
+    // headers). Note that we use the alias_rule as a base.
+    //
+    class libux_install_rule: public install::alias_rule, virtual common
+    {
+    public:
+      libux_install_rule (data&&, const link_rule&);
+
+      virtual const target*
+      filter (action, const target&, prerequisite_member) const override;
+
+      virtual bool
+      match (action, target&, const string&) const override;
+
+    private:
+      const link_rule& link_;
+    };
+  }
+}
+
+#endif // BUILD2_CC_INSTALL_RULE_HXX