Move prompt facility from bpkg to libbutl

1 files changed, 36 insertions, 0 deletions

diff --git a/libbutl/prompt.mxx b/libbutl/prompt.mxx
new file mode 100644
index 0000000..5d431a6
--- /dev/null
+++ b/libbutl/prompt.mxx
@@ -0,0 +1,36 @@
+// file      : libbutl/prompt.mxx -*- C++ -*-
+// copyright : Copyright (c) 2014-2018 Code Synthesis Ltd
+// license   : MIT; see accompanying LICENSE file
+
+#ifndef __cpp_modules
+#pragma once
+#endif
+
+// C includes.
+
+#ifndef __cpp_lib_modules
+#include <string>
+#endif
+
+// Other includes.
+
+#ifdef __cpp_modules
+export module butl.prompt;
+#ifdef __cpp_lib_modules
+import std.core;
+#endif
+#endif
+
+#include <libbutl/export.hxx>
+
+LIBBUTL_MODEXPORT namespace butl
+{
+  // The Y/N prompt. The def argument, if specified, should be either 'y' or
+  // 'n'. It is used as the default answer, in case the user just hits enter.
+  //
+  // Write the prompt to diag_stream. Throw ios_base::failure if no answer
+  // could be extracted from stdin (for example, because it was closed).
+  //
+  LIBBUTL_SYMEXPORT bool
+  yn_prompt (const std::string&, char def = '\0');
+}