From 7c83b407648f1ef919218d8965d4c21378910755 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Wed, 2 Sep 2015 17:06:10 +0200
Subject: Add --generate-parse option

When specified, CLI will generate parse() functions instead of parsing
constructors. This is primarily useful for being able to parse into an
already initialized options class instance, for example, to implement
merging/overriding.
---
 cli/header.cxx | 22 ++++++++++++++--------
 1 file changed, 14 insertions(+), 8 deletions(-)

(limited to 'cli/header.cxx')

diff --git a/cli/header.cxx b/cli/header.cxx
index ddf0895..6ff1f6b 100644
--- a/cli/header.cxx
+++ b/cli/header.cxx
@@ -129,14 +129,23 @@ namespace
       //
       if (!abst)
       {
-        os << name << " (int& argc," << endl
+        os << name << " ();"
+           << endl;
+
+        // Are we generating parsing constructors or parse() functions?
+        //
+        string n (options.generate_parse ()
+                  ? string ("void\n") + (name != "parse" ? "parse" : "parse_")
+                  : name);
+
+        os << n << " (int& argc," << endl
            << "char** argv," << endl
            << "bool erase = false," << endl
            << um << " option = " << um << "::fail," << endl
            << um << " argument = " << um << "::stop);"
            << endl;
 
-        os << name << " (int start," << endl
+        os << n << " (int start," << endl
            << "int& argc," << endl
            << "char** argv," << endl
            << "bool erase = false," << endl
@@ -144,7 +153,7 @@ namespace
            << um << " argument = " << um << "::stop);"
            << endl;
 
-        os << name << " (int& argc," << endl
+        os << n << " (int& argc," << endl
            << "char** argv," << endl
            << "int& end," << endl
            << "bool erase = false," << endl
@@ -152,7 +161,7 @@ namespace
            << um << " argument = " << um << "::stop);"
            << endl;
 
-        os << name << " (int start," << endl
+        os << n << " (int start," << endl
            << "int& argc," << endl
            << "char** argv," << endl
            << "int& end," << endl
@@ -161,13 +170,10 @@ namespace
            << um << " argument = " << um << "::stop);"
            << endl;
 
-        os << name << " (" << cli << "::scanner&," << endl
+        os << n << " (" << cli << "::scanner&," << endl
            << um << " option = " << um << "::fail," << endl
            << um << " argument = " << um << "::stop);"
            << endl;
-
-        os << name << " ();"
-           << endl;
       }
 
       //
-- 
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