From: Wolfgang Bangerth <bangerth@math.tamu.edu>
Date: Thu, 21 Aug 2014 18:26:15 +0000 (-0500)
Subject: Use an explicit cast when need a bool from optional<...>. source/base/parameter_handl... 
X-Git-Tag: v8.2.0-rc1~187^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=57d975bc4c9c3d76bce59ee7462a6e94487c7e82;p=dealii.git

Use an explicit cast when need a bool from optional<...>. source/base/parameter_handler.cc

The implicit cast was previously allowed, but newer versions of BOOST together with C++11 mark
the cast as 'explicit', and it fails in the current context.
---

diff --git a/source/base/parameter_handler.cc b/source/base/parameter_handler.cc
index a81e36349b..4f5f4e35a2 100644
--- a/source/base/parameter_handler.cc
+++ b/source/base/parameter_handler.cc
@@ -1275,7 +1275,7 @@ ParameterHandler::demangle (const std::string &s)
 bool
 ParameterHandler::is_parameter_node (const boost::property_tree::ptree &p)
 {
-  return (p.get_optional<std::string>("value"));
+  return static_cast<bool>(p.get_optional<std::string>("value"));
 }