From f4605a1bc775c820a04cca413c267cd52fb40cbc Mon Sep 17 00:00:00 2001
From: Paul Beckingham <paul@beckingham.net>
Date: Sat, 31 May 2014 13:52:59 -0400
Subject: [PATCH] Parser

- Implemented ::capture_last, so that new args can be injected at either end
  of the command line.
---
 src/Parser.cpp | 16 ++++++++++++++++
 src/Parser.h   |  1 +
 2 files changed, 17 insertions(+)

diff --git a/src/Parser.cpp b/src/Parser.cpp
index 0b97a2dc2..8ace3463c 100644
--- a/src/Parser.cpp
+++ b/src/Parser.cpp
@@ -531,6 +531,22 @@ Tree* Parser::captureFirst (const std::string& arg)
   return t;
 }
 
+////////////////////////////////////////////////////////////////////////////////
+Tree* Parser::captureLast (const std::string& arg)
+{
+  // Insert the arg as the new first branch.
+  Tree* t = new Tree ("argIns");
+  if (!t)
+    throw std::string (STRING_ERROR_MEMORY);
+
+  t->attribute ("raw", arg);
+  t->tag ("?");
+  t->_trunk = _tree;
+
+  _tree->_branches.push_back (t);
+  return t;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 const std::string Parser::getFilterExpression ()
 {
diff --git a/src/Parser.h b/src/Parser.h
index 0f8440fbe..ea09b5353 100644
--- a/src/Parser.h
+++ b/src/Parser.h
@@ -57,6 +57,7 @@ public:
   void applyOverrides ();
   void injectDefaults ();
   Tree* captureFirst (const std::string&);
+  Tree* captureLast (const std::string&);
 
   const std::string getFilterExpression ();
   const std::vector <std::string> getWords () const;