[Description] The line number in the current source file. The line number is a decimal integer constant. It can be altered with a #line directive. [Macro] 
__LINE__
_ _ D A T E _ _
_ _ F I L E _ _
_ _ L I N E _ _
_ _ S T D C _ _
_ _ T I M E _ _
_ _ T I M E S T A M P _ _