From a63f4fef44db059a2f6d2a5f698eae02053ca664 Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Fri, 18 Mar 2022 15:03:43 +1000
Subject: [PATCH] cmdopt2/args: add `ignore` helper

---
 cmdopt2/args.cpp | 21 +++++++++++++++++++++
 cmdopt2/args.hpp |  4 ++++
 2 files changed, 25 insertions(+)

diff --git a/cmdopt2/args.cpp b/cmdopt2/args.cpp
index 5a1fdf6f..ac2de44f 100644
--- a/cmdopt2/args.cpp
+++ b/cmdopt2/args.cpp
@@ -22,6 +22,16 @@ positional::create (std::string &&name)
 }
 
 
+//-----------------------------------------------------------------------------
+positional
+positional::ignore (void) const
+{
+    positional res = *this;
+    res.acceptor1.reset ();
+    return res;
+}
+
+
 ///////////////////////////////////////////////////////////////////////////////
 keyword
 keyword::create (char const *name)
@@ -105,4 +115,15 @@ keyword::acceptor (acceptor0_t _acceptor)
     keyword res = *this;
     res.acceptor0 = _acceptor;
     return res;
+}
+
+
+//-----------------------------------------------------------------------------
+keyword
+keyword::ignore (void) const
+{
+    keyword res = *this;
+    res.acceptor0.reset ();
+    res.acceptor1.reset ();
+    return res;
 }
\ No newline at end of file
diff --git a/cmdopt2/args.hpp b/cmdopt2/args.hpp
index a642d106..758dfe2c 100644
--- a/cmdopt2/args.hpp
+++ b/cmdopt2/args.hpp
@@ -84,6 +84,8 @@ namespace cruft::cmdopt2 {
         static positional create (std::string const &name);
         static positional create (std::string &&name);
 
+        positional ignore (void) const;
+
         int count = 1;
     };
 
@@ -99,6 +101,8 @@ namespace cruft::cmdopt2 {
         using ops::acceptor;
         keyword acceptor (acceptor0_t);
 
+        keyword ignore (void) const;
+
         keyword flag (void) const;
         keyword flag (std::string_view long_) const;
         keyword flag (char short_) const;