1 files changed, 1 insertions, 9 deletions
diff --git a/src/parse/lex.hpp b/src/parse/lex.hpp
index 3081e255..937be516 100644
--- a/src/parse/lex.hpp
+++ b/src/parse/lex.hpp
@@ -175,16 +175,8 @@ public:
 struct Codepoint {
     uint32_t    v;
     Codepoint(uint32_t v): v(v) { }
-    friend ::std::string& operator+=(::std::string& s, const Codepoint& cp) {
-        if( cp.v < 128 ) {
-            s += (char)cp.v;
-        }
-        else {
-            throw ::std::runtime_error("TODO: Encode UTF-8 codepoint");
-        }
-        return s;
-    }
 };
+extern ::std::string& operator+=(::std::string& s, const Codepoint& cp);
 
 class Lexer:
     public TokenStream