Accept both lower and upper case y/n as valid answers in yn_prompt()

1 files changed, 4 insertions, 0 deletions

diff --git a/libbutl/prompt.hxx b/libbutl/prompt.hxx
index 90b8dbf..2a07708 100644
--- a/libbutl/prompt.hxx
+++ b/libbutl/prompt.hxx
@@ -15,6 +15,10 @@ namespace butl
   // Write the prompt to diag_stream. Throw ios_base::failure if no answer
   // could be extracted from stdin (for example, because it was closed).
   //
+  // Note that the implementation accepts both lower and upper case y/n as
+  // valid answers (apparently the capitalized default answer confuses some
+  // users into answering with capital letters).
+  //
   LIBBUTL_SYMEXPORT bool
   yn_prompt (const std::string&, char def = '\0');
 }