static bool SafeParseAndEvaluate(ProjectInfo project, MSBuildEvaluationContext context, string condition, bool collectConditionedProperties = false)
{
try {
if (String.IsNullOrEmpty(condition))
{
return(true);
}
try {
ConditionExpression ce = ConditionParser.ParseCondition(condition);
if (!ce.CanEvaluateToBool(context))
{
throw new InvalidProjectFileException(String.Format("Can not evaluate \"{0}\" to bool.", condition));
}
if (collectConditionedProperties)
{
ce.CollectConditionProperties(project.ConditionedProperties);
}
return(ce.BoolEvaluate(context));
} catch (ExpressionParseException epe) {
throw new InvalidProjectFileException(
String.Format("Unable to parse condition \"{0}\" : {1}", condition, epe.Message),
epe);
} catch (ExpressionEvaluationException epe) {
throw new InvalidProjectFileException(
String.Format("Unable to evaluate condition \"{0}\" : {1}", condition, epe.Message),
epe);
}
}
catch {
// The condition is likely to be invalid
return(false);
}
}