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Diffstat (limited to 'odb/traversal/relational/elements.hxx')
-rw-r--r-- | odb/traversal/relational/elements.hxx | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/odb/traversal/relational/elements.hxx b/odb/traversal/relational/elements.hxx new file mode 100644 index 0000000..72b8c39 --- /dev/null +++ b/odb/traversal/relational/elements.hxx @@ -0,0 +1,147 @@ +// file : odb/traversal/relational/elements.hxx +// author : Boris Kolpackov <boris@codesynthesis.com> +// copyright : Copyright (c) 2009-2011 Code Synthesis Tools CC +// license : GNU GPL v3; see accompanying LICENSE file + +#ifndef ODB_TRAVERSAL_RELATIONAL_ELEMENTS_HXX +#define ODB_TRAVERSAL_RELATIONAL_ELEMENTS_HXX + +#include <cutl/compiler/traversal.hxx> +#include <odb/semantics/relational/elements.hxx> + +namespace traversal +{ + namespace relational + { + using namespace cutl; + + // + // + typedef compiler::dispatcher<semantics::relational::node> node_dispatcher; + typedef compiler::dispatcher<semantics::relational::edge> edge_dispatcher; + + // + // + struct node_base: node_dispatcher, edge_dispatcher + { + void + edge_traverser (edge_dispatcher& d) + { + edge_dispatcher::traverser (d); + } + + edge_dispatcher& + edge_traverser () + { + return *this; + } + + using node_dispatcher::dispatch; + using edge_dispatcher::dispatch; + + using edge_dispatcher::iterate_and_dispatch; + }; + + struct edge_base: edge_dispatcher, node_dispatcher + { + void + node_traverser (node_dispatcher& d) + { + node_dispatcher::traverser (d); + } + + node_dispatcher& + node_traverser () + { + return *this; + } + + using edge_dispatcher::dispatch; + using node_dispatcher::dispatch; + + using node_dispatcher::iterate_and_dispatch; + }; + + inline edge_base& + operator>> (node_base& n, edge_base& e) + { + n.edge_traverser (e); + return e; + } + + inline node_base& + operator>> (edge_base& e, node_base& n) + { + e.node_traverser (n); + return n; + } + + // + // + template <typename X> + struct node: compiler::traverser_impl<X, semantics::relational::node>, + virtual node_base + { + }; + + template <typename X> + struct edge: compiler::traverser_impl<X, semantics::relational::edge>, + virtual edge_base + { + }; + + // + // Edges + // + + struct names: edge<semantics::relational::names> + { + names () + { + } + + names (node_dispatcher& n) + { + node_traverser (n); + } + + virtual void + traverse (type&); + }; + + // + // Nodes + // + + struct nameable: node<semantics::relational::nameable> {}; + + // + // + template <typename T> + struct scope_template: node<T> + { + public: + virtual void + traverse (T& s) + { + names (s); + } + + virtual void + names (T& s) + { + names (s, *this); + } + + virtual void + names (T& s, edge_dispatcher& d) + { + iterate_and_dispatch (s.names_begin (), s.names_end (), d); + } + }; + + struct scope: scope_template<semantics::relational::scope> {}; + } +} + +#endif // ODB_TRAVERSAL_RELATIONAL_ELEMENTS_HXX |