From 1dc4b29bb57b14bfd8f700be80224b6d865f0184 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Wed, 13 Nov 2019 09:46:04 +0200
Subject: Implement config.config.persist logic

Note that the inherited value part is documented but is not yet fully
implemented.
---
 libbuild2/config/module.hxx | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'libbuild2/config/module.hxx')

diff --git a/libbuild2/config/module.hxx b/libbuild2/config/module.hxx
index eccd61b..0a35369 100644
--- a/libbuild2/config/module.hxx
+++ b/libbuild2/config/module.hxx
@@ -86,6 +86,16 @@ namespace build2
       bool
       save_module (const char* name, int prio = 0);
 
+      // Return true if the variable is already saved.
+      //
+      bool
+      saved (const variable& var)
+      {
+        auto i (saved_modules.find_sup (var.name));
+        return i != saved_modules.end () &&
+          i->second.find (var) != i->second.end ();
+      }
+
       // Cached (during init) config.config.persist value, if defined.
       //
       const vector<pair<string, string>>* persist = nullptr;
-- 
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