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Error messages when installing property aliases fails.

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This commit is contained in:
ThorstenB
2012-04-05 20:03:07 +02:00
parent 1a835a2e1b
commit 77909577e4
1 changed files with 33 additions and 7 deletions
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40
simgear/props/props.cxx
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@@ -778,13 +778,39 @@ SGPropertyNode::~SGPropertyNode ()
bool
SGPropertyNode::alias (SGPropertyNode * target)
{
if (target == 0 || _type == props::ALIAS || _tied)
return false;
clearValue();
get(target);
_value.alias = target;
_type = props::ALIAS;
return true;
if (target && (_type != props::ALIAS) && (!_tied))
{
clearValue();
get(target);
_value.alias = target;
_type = props::ALIAS;
return true;
}
#if PROPS_STANDALONE
#else
if (!target)
{
SG_LOG(SG_GENERAL, SG_ALERT,
"Failed to create alias for " << getPath() << ". "
"The target property does not exist.");
}
else
if (_type == props::ALIAS)
{
SG_LOG(SG_GENERAL, SG_ALERT,
"Failed to create alias at " << target->getPath() << ". "
"Source "<< getPath() << " is also an alias. Unsupported recursion.");
}
else
if (_tied)
{
SG_LOG(SG_GENERAL, SG_ALERT, "Failed to create alias at " << target->getPath() << ". "
"Source " << getPath() << " is a tied property.");
}
#endif
return false;
}