From ea27d1b45a5ff975a1e90e3e9f4b74ff8d34056e Mon Sep 17 00:00:00 2001
From: John Wiegley <johnw@newartisans.com>
Date: Tue, 29 Jul 2008 20:10:03 -0400
Subject: Moved around and renamed a very large amount of code in order to
 rationalize the way that value expressions extract information from journal
 objects.

---
 expr.cc | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

(limited to 'expr.cc')

diff --git a/expr.cc b/expr.cc
index 0319e243..086f2494 100644
--- a/expr.cc
+++ b/expr.cc
@@ -111,6 +111,23 @@ value_t expr_t::calc(scope_t& scope) const
   return NULL_VALUE;
 }
 
+bool expr_t::is_constant() const
+{
+  return ptr.get() && ptr->is_value();
+}
+
+value_t& expr_t::constant_value()
+{
+  assert(is_constant());
+  return ptr->as_value_lval();
+}
+
+const value_t& expr_t::constant_value() const
+{
+  assert(is_constant());
+  return ptr->as_value();
+}
+
 value_t expr_t::eval(const string& _expr, scope_t& scope)
 {
   return expr_t(_expr).calc(scope);
-- 
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