lib/cpp: add missing doc

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>

diff --git a/lib/cpp.nit b/lib/cpp.nit
index 4eeb2a5..bd113dd 100644 (file)
--- a/lib/cpp.nit
+++ b/lib/cpp.nit
@@ -24,10 +24,12 @@ extern class CppString in "C++" `{ std::string* `}
 end
 
 redef class Text
+       # Get `self` as a `CppString`
        fun to_cpp_string: CppString do return to_cstring.to_cpp_string
 end
 
 redef class NativeString
+       # Get `self` as a `CppString`
        fun to_cpp_string: CppString in "C++" `{
                return new std::string(recv);
        `}