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Diffstat (limited to 'odb/odb/emitter.hxx')
-rw-r--r-- | odb/odb/emitter.hxx | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/odb/odb/emitter.hxx b/odb/odb/emitter.hxx new file mode 100644 index 0000000..1071dab --- /dev/null +++ b/odb/odb/emitter.hxx @@ -0,0 +1,47 @@ +// file : odb/emitter.hxx +// license : GNU GPL v3; see accompanying LICENSE file + +#ifndef ODB_EMITTER_HXX +#define ODB_EMITTER_HXX + +#include <string> +#include <sstream> + +// Emit a code construct one line at a time. +// +struct emitter +{ + virtual void + pre (); + + virtual void + line (const std::string&) = 0; + + virtual void + post (); +}; + +// Send output line-by-line (std::endl marker) to the emitter. +// +class emitter_ostream: public std::ostream +{ +public: + emitter_ostream (emitter& e): std::ostream (&buf_), buf_ (e) {} + +private: + class streambuf: public std::stringbuf + { + public: + streambuf (emitter& e): e_ (e) {} + + virtual int + sync (); + + private: + emitter& e_; + }; + + streambuf buf_; +}; + +#endif // ODB_EMITTER_HXX |