initial commit

include/sedpp/Replacement.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#include <regex.h>
+#include <string>
+#include <vector>
+
+namespace sedpp {
+
+// Expands an s-command replacement.  Besides &, \1...\9, and literal escapes,
+// GNU sed supports case-conversion state such as \U...\E and one-byte \u/\l.
+class Replacement {
+public:
+  static std::string expand(const std::string &replacement,
+                            const std::string &subject,
+                            const std::vector<regmatch_t> &groups);
+};
+
+} // namespace sedpp