up

The up command selects and prints the function that called this one, or the function specified by the frame number in the call stack.

Syntax

up [ frames ]

frames specifies how many frames up to go in the stack. The default is 1.

Usage

The up command moves towards the outermost frame, to frames that have existed longer. To print the function that called the current function, use the up command without an argument.

See stack frames for a brief description of frames.

Example

MAIN
    CALL func1()
END MAIN

FUNCTION func1() RETURNS ()
    DEFINE x INT, s STRING
    CALL func2() RETURNING x, s
END FUNCTION

FUNCTION func2() RETURNS (INT,STRING)
    RETURN 999, "xxxxxx"
END FUNCTION

$ fglcomp -M prog.4gl && fglrun -d prog.42m

(fgldb) break func2
Breakpoint 1 at 0x00000000: file prog.4gl, line 11.

(fgldb) run
Breakpoint 1, func2() at prog.4gl:11
   8     END FUNCTION
   9
   10    FUNCTION func2() RETURNS (INT,STRING)
-> 11        RETURN 999, "xxxxxx"
   12    END FUNCTION
   13

(fgldb) up
#1 func1() at prog.4gl:7
   4
   5     FUNCTION func1() RETURNS ()
   6         DEFINE x INT, s STRING
-> 7         CALL func2() RETURNING x, s
   8     END FUNCTION
   9
   10    FUNCTION func2() RETURNS (INT,STRING)

(fgldb) down
#0 func2() at prog.4gl:11
   8     END FUNCTION
   9
   10    FUNCTION func2() RETURNS (INT,STRING)
-> 11        RETURN 999, "xxxxxx"
   12    END FUNCTION
   13