From 99dfd1924b8a7bb5bdd0df132416ff8de6c382fa Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Fri, 10 Nov 2017 20:41:51 +0200
Subject: Relax substitution requirements, add alternative symbol in version
 .in support

Give this (legacy) version.h.in:

Can now do:

h{version}: in{version} file{$src_root/manifest}
h{version}: in.symbol = '@'
h{version}: FOO = $project.version
---
 build2/version/init.cxx | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'build2/version/init.cxx')

diff --git a/build2/version/init.cxx b/build2/version/init.cxx
index 7d08642..c0ce4cd 100644
--- a/build2/version/init.cxx
+++ b/build2/version/init.cxx
@@ -272,6 +272,16 @@ namespace build2
         }
       }
 
+      // Enter variables. Note: some overridable, some not.
+      //
+      auto& vp (var_pool.rw (rs));
+
+      // Alternative variable substitution symbols.
+      //
+      // @@ Note: should be moved to the 'in' module once we have it.
+      //
+      m.in_symbol = &vp.insert<string> ("in.symbol");
+
       // Register rules.
       //
       {
-- 
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