1 files changed, 73 insertions, 0 deletions
diff --git a/libbuild2/forward.hxx b/libbuild2/forward.hxx
new file mode 100644
index 0000000..1c1eb77
--- /dev/null
+++ b/libbuild2/forward.hxx
@@ -0,0 +1,73 @@
+// file      : libbuild2/forward.hxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2019 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#ifndef LIBBUILD2_FORWARD_HXX
+#define LIBBUILD2_FORWARD_HXX
+
+#include <libbuild2/types.hxx>
+
+namespace build2
+{
+  // Forward declarations for the build state.
+
+  // <libbuild2/action.hxx>
+  //
+  struct action;
+
+  // <libbuild2/spec.hxx>
+  //
+  struct opspec;
+
+  // <libbuild2/variable.hxx>
+  //
+  class value;
+  using values = small_vector<value, 1>;
+  struct lookup;
+
+  struct variable;
+  class variable_pool;
+  class variable_map;
+  struct variable_override;
+  using variable_overrides = vector<variable_override>;
+  class variable_override_cache;
+
+  // <libbuild2/function.hxx>
+  //
+  class function_map;
+
+  // <libbuild2/scope.hxx>
+  //
+  class scope;
+  class scope_map;
+
+  // <libbuild2/target-type.hxx>
+  //
+  class target_type_map;
+
+  // <libbuild2/target-key.hxx>
+  //
+  class target_key;
+
+  // <libbuild2/target.hxx>
+  //
+  class target;
+  class target_set;
+  class include_type;
+  struct prerequisite_member;
+
+  // <libbuild2/prerequisite.hxx>
+  //
+  class prerequisite;
+  class prerequisite_key;
+
+  // <libbuild2/rule.hxx>
+  //
+  class rule;
+
+  // <libbuild2/context.hxx>
+  //
+  class context;
+}
+
+#endif // LIBBUILD2_FORWARD_HXX