Added bool operator and ! operator

We can now check if a number evaluates to false or true by doing a
conversion to bool or use the ! operator.

Signed-off-by: Olivier Gayot <og@satcom1.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/number.cpp b/number.cpp
index 12448de..94ef1ee 100644
--- a/number.cpp
+++ b/number.cpp
@@ -70,6 +70,11 @@ number::to_uint32() const
     return (*this == 0) ? 0 : _operands.front();
 }
 
+number::operator bool() const
+{
+    return *this != 0;
+}
+
 /* }}} */
 /* Operations {{{ */
 
@@ -226,6 +231,12 @@ number::operator!=(const number &n) const
     return _operands != n._operands;
 }
 
+bool
+number::operator!() const
+{
+    return !static_cast<bool>(*this);
+}
+
 /* }}} */
 /* Assignment operators {{{ */