From 7a2f5753a12a68e87f8556f6e833710f147533b2 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Wed, 9 Sep 2015 14:10:24 +0200
Subject: Add support for evaluation context

For now it acts as just the value mode that can be enabled anywhere
variable expansion is supported, for example:

(foo=bar):

And the primary use currently is to enable/test quoted and indirect
variable expansion:

"foo bar" = FOO BAR
print $"foo bar"    # Invalid.
print $("foo bar")  # Yeah, baby.

foo = FOO
FOO = foo
print $($foo)

Not that you should do something like this...
---
 build/parser | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'build/parser')

diff --git a/build/parser b/build/parser
index b5155be..0678a62 100644
--- a/build/parser
+++ b/build/parser
@@ -77,6 +77,9 @@ namespace build
     variable_name (names_type&&, const location&);
 
     names_type
+    eval (token&, token_type&);
+
+    names_type
     names (token& t, token_type& tt)
     {
       names_type ns;
-- 
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