HP 3000 Manuals HP 3000 Manuals
REDO
Allows error correction or changes to any of the last 20 commands issued.
Syntax
REDO [qualifier] [.]
Parameters
qualifiers You choose the command to edit using the REDO
command with an optional qualifier. The possible
qualifiers include:
No qualifier No qualifier means to edit the
previous command. Example: REDO
Absolute An absolute number is a positive
number number between 1 and 20, inclusive,
that indicates the command on the
redo stack corresponding to the
number entered that is to be selected
for processing. Example: REDO 4
Relative A relative number is a negative
number number between -20 and -1, inclusive,
that indicates the command on the
redo stack at the specified offset
from the current REDO command that is
to be selected for processing. Note
that a relative offset of -1 is
equivalent to no qualifier, as it
specifies the previous command.
Example: REDO -5
Character A character string is a string of
string characters that can be accepted as a
valid System Dictionary name. The
string is used as a pattern (no
selection criteria can be used) to
search back into the redo history
stack to find the first command
starting with characters that match
the specified string. Note that the
case of the letters is important
since an exact match is required.
The corresponding command is then
selected for processing. Example:
REDO CREATE.
Quoted A quoted string is a string of
string characters surrounded by quotes. A
quoted string works the same as a
character string except that the
quotes allow the inclusion of
characters, including blanks, that
are not allowed for character
strings. Example: REDO "CREATE
ENTITY"
Subcommands
A Appends one or more characters following the subcommand to
the end of the current line, regardless of the position of
the subcommand.
B Breaks the line into two lines, moving the character above
the B and all following characters to the next line. The
second line becomes the current edit line.
D Deletes the character above the D. You may also use a D
below both the first and last character to be deleted with
either spaces or Ds between thus deleting all characters
between the first and last D inclusive.
E Exits the REDO editing mode without executing the edited
command. All REDO subcommands issued between the REDO
command and the EXIT command are ignored.
H Lists all available editing subcommands in REDO mode. Your
current edit line is then redisplayed.
I Inserts one or more characters immediately preceding the
character that is above the I. You can join a delete and
insert by using D's followed by an I and the characters to
be inserted.
L Lists the complete command as it is currently edited and
then redisplays the line you are currently editing.
R Replaces the characters above with the new characters you
enter. The first character replaced is the one above the
R.
X Executes the current command as it has been edited.
+ Places the cursor on the next line of the command you are
editing. You can enter + followed by an number n, for the
number of lines you want to skip forward. If you do not
enter a number, the default is to move forward one line.
If the number of lines advanced moves the cursor beyond the
end of the command, the cursor is moved to the last line of
the command.
- Places the cursor on the previous line of the command you
are editing. You can enter - followed by n, for the number
of lines you want to skip backward. If you do not enter a
number, the default is to move backward one line. If the
number of lines moved places the cursor before the first
line of the command, the cursor is moved to the first line
of the command.
[[RETURN]] Places the cursor on the next line of the command you are
editing, if the cursor is not currently on the last line of
the command. If the cursor is on the last line, the
command executes as it has been edited.
Description
You can use the REDO command to edit any of the previous 20 commands you
issued. When you issue the REDO command you will enter an editing mode
and the first line of the command is displayed for modification.
To modify the command, use the previous subcommands. If you enter any
character other than a valid subcommand, it and all following characters
are interpreted as replacement characters and they replace the characters
above them in the command. For example, if you type "TYPE" below a set
of characters, the word "TYPE" replaces the four characters in the
command line above.
The REDO command is not allowed when executing in a macro, when input is
from a file, or when you are executing in batch mode.
Because dictionary commands can span more than one line, REDO allows you
to edit the command, line by line. You therefore do not have to reenter
the entire command when an error is made.
Once you issue the REDO command, you are placed in edit mode and the
first line of the command is displayed for modification.
If you press [[CONTROL]] Y during processing, the REDO command terminates
as if you specified the E subcommand.
Open Mode: Any
Scope: Any
Example
The following example corrects the typographical error for the word
"entity" (which is misspelled "entiy" ) and then executes the corrected
command.
>CREATE ENTITY FIRST-NAME;
>>ENTIY-TYPE = ELEMENT;
>>ATTRIBUTE-LIST = (ELEMENT-TYPE = X, BYTE-LENGTH = 20).
CREATE ENTITY FIRST-NAME;
ENTIY-TYPE = ELEMENT;
^
Invalid keyword (SDERR 1242)
^
Text skipped from last error to here (SDWARN 1210)
Required keyword ENTITY-TYPE not specified (SDERR 1249)
>REDO
CREATE ENTITY FIRST-NAME;
+
ENTIY-TYPE = ELEMENT;
IT
ENTITY-TYPE = ELEMENT;
X
>