implemented very simple repl

src/repl/repl.cpp

@@ -0,0 +1,30 @@
+#include "repl.hpp"
+
+#include "lexer/lexer.hpp"
+
+#include <sstream>
+#include <string>
+
+static const std::string PROMPT = ">> ";
+
+namespace repl {
+
+    void start(std::istream& in, std::ostream& out) {
+        while (true) {
+            out << PROMPT;
+            std::string line;
+            if (!std::getline(in, line))
+                return;
+
+            std::istringstream ss(line);
+
+            lexer::lexer l{ss};
+            for (token::token tok = l.next_token();
+                 tok.type != token::type::END_OF_FILE;
+                 tok = l.next_token())
+                out << tok << " ";
+            out << std::endl;
+        }
+    }
+
+} // namespace repl

src/repl/repl.hpp

@@ -0,0 +1,6 @@
+#include <istream>
+#include <ostream>
+
+namespace repl {
+    void start(std::istream&, std::ostream&);
+}