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 PROCLINE()
 Return the source line number of the current or previous activation
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 Syntax

     PROCLINE([<nActivation>]) --> nSourceLine

 Arguments

     <nActivation> is a numeric value that specifies which activation to
     query.  Zero refers to the current activation, one refers to the
     previous activation, etc.  If not specified, the default value is zero.

 Returns

     PROCLINE() returns the line number of the last line executed in a
     currently executing procedure, function, or code block as an integer
     numeric value.  If the /L compiler option suppresses line number
     information, PROCLINE() always returns zero.

 Description

     PROCLINE() queries the CA-Clipper activation stack to determine the last
     line executed in a currently executing procedure, user-defined function,
     or code block.  The activation stack is an internal structure that
     maintains a record of each procedure, function, or code block
     invocation.  A line number is relative to the beginning of the original
     source file.  A line includes a comment, blank line, preprocessor
     directive, and a continued line.  A multistatement line is counted as a
     single line.

     For the current activation, PROCLINE() returns the number of the current
     line.  For a previous activation, PROCLINE() returns the number of the
     line that invoked the procedure or a user-defined function in which
     PROCLINE() is invoked.

     If the activation being queried is a code block evaluation, PROCLINE()
     returns the line number of the procedure in which the code block was
     originally defined.

     PROCLINE() is used with PROCNAME() to report debugging information.

 Examples

     .  In this example, PROCLINE() returns the line number for the
        current activation, followed by the line number of the previous
        activation:

        // First line of source file
        MyFunction()
           RETURN

        FUNCTION MyFunction
           ? PROCLINE()      // Result: 6 (current activation)
           ? PROCLINE(1)      // Result: 2 (previous activation)
           RETURN NIL

 Files   Library is CLIPPER.LIB.