g000001/prolog.teco

## prolog.teco
!* -*-TECO-*-	Library for PROLOG Editing System by T.Chikayama!

!~FILENAME~:! !Package for programming in PROLOG!
PROLOG

!& Setup PROLOG Library:! !& Set up environment for editing PROLOG codes.
Make *PROLOG* buffer for later use.!

   F[D File◊			    !* Save Teco Default Filename. !
   1,:I**PROLOG*◊M(M.M &_Find_Buffer◊)"L    !* If no *PROLOG* buffer yet,!
     Q◊Buffer_Name◊[0		            !* Save current buffer's name. !
     M(M.M Select_Buffer◊) *PROLOG*◊	    !* Create *PROLOG* buffer. !
     M(M.M PROLOG_Mode◊)		    !* Put in PROLOG Mode. !
     M(M.M Select_Buffer◊) ≥0◊ '	    !* restore previous buffer. !

   ]0 F]D File◊			    !* Restore saved Registers. !

   ≤				    !* Return. !

!PROLOG Mode:! !C Set up for editing PROLOG code.
Set syntax of "...", '...', %, [...], {...}, etc appropriately.
{...}, [...], (...) flash matching delimiters according to
setting of q◊Display Matching Paren◊ and q◊Permit UnMatched Paren◊.
Define several PROLOG-oriented command keys.!

m(m.m_&_Init_Buffer_Locals◊)	    !* Discard locals of old mode, and set: !
M.Q..D◊				    !* Make a local qreg ..D		!
0FO..QPROLOG_..D◊F"N U..D'	    !* Dont copy ..D if dont have to	!
"#w :i..D ≥..D◊		    !* Copy ..D so we dont side effect	!
    Q..DM.VPROLOG_..D◊		    !* Remember this for next time	!
    5*≡%  :f¬..D_;◊		    !* % starts comment			!
    5*≡,  :f¬..D__◊		    !* , is whitespace			!
    5*≡;  :f¬..D__◊		    !* ; is whitespace			!
    5*≡"  :f¬..D_|◊		    !* double quotes and                !
    5*≡'  :f¬..D_|◊		    !* quotes are like vertical bars	!
    5*≡|  :f¬..D_A◊		    !* |s are normal special characters	!
    5*≡[  :f¬..D_(◊		    !* Brackets are like parens		!
    5*≡]  :f¬..D_)[◊		    !* Brackets are like parens		!
    5*≡{  :f¬..D_(◊		    !* Braces are also like parens	!
    5*≡}  :f¬..D_){◊'		    !* Braces are also like parens	!
1,(:i*%◊)M.LComment_Start◊	    !* Comment starts with %		!
1,(:i*%_◊)M.LComment_Begin◊	    !* Comment begins with %<Space>	!
1,(:i*/8+1*8◊)M.LComment_Rounding◊w !* Comment rounding...              !
1,40m.LComment_Column◊w		    !* Set comment column               !

q◊Permit_Unmatched_Paren◊"l	    !* If user hasn't inhibited feature,!
  1,0m.L Permit_Unmatched_Paren◊'   !*  Inhibit unmatched parens	!

M.M ^R_Tab_to_Tab_Stop◊ M.Q≡I◊	    !* <Tab> becomes ^R Tab to Tab Stop !
1,Q⋂∫(1,Q.⋂∫ M.Q⋂∫◊W )M.Q .⋂∫◊  !* Exchange rubout flavors.!
				    !* <Delete> hacks tabs !

M.M ^R_Uppercase_Initial◊ M.Q..⋂c◊w	    !* M-c is standard M-C !
M.M ^R_Center_Line◊       M.Q..⋂s◊w	    !* M-s is standard M-S !

M.M ^R_PROLOG_Center_Comment◊ M.Q..⋂C◊w    !* M-C !
!* M.M ^R_PROLOG_Beginning_of_Clause◊ M.Q..⋂a◊w M-a !
M.M ^R_PROLOG_End_of_Clause◊ M.Q..⋂e◊w	    !* M-e !
M.M ^R_PROLOG_Zap_for_Reconsult◊ M.Q..⋂z◊  !* M-z !
M.M ^R_PROLOG_Zap_for_Compile◊ M.Q..⋂Z◊    !* M-Z !
M.M ^R_PROLOG_Save_Region◊ M.Q..⋂S◊	    !* M-S !

1M(M.M&_Set_Mode_Line◊)PROLOG◊	    !* Set mode!
 ≤				    !* Done. !

!^R PROLOG Save Region:! !^R Store Region between Mark and Point to *PROLOG*.
Contents of *PROLOG* is to be passed to inferior PROLOG later.
Stuff is appended to the contents of the *PROLOG* Buffer.
If given argument (e.g. ≤^R Universal Argument≤), also select the buffer. !

   M(M.M &_PROLOG_Save_Region◊)
   F←F→"N M(M.M Select_Buffer◊) *PROLOG*◊ '


!& PROLOG Save Region:! !S Store Region between Mark and Point to *PROLOG*.
The Region is appended to the contents of the *PROLOG* Buffer.
A pair of arguments may be given instead of the Mark,
if called from a Teco program. !

    F[VB◊ F[VZ◊			    !* Save Virtual Bounds. !
    F←F→"E :⊗,.' "# F←' F· FS Boundaries◊   !* Bind them to the Region. !
    Q..O[3			    !* Save Region in Q Register 3. !
    Q:.B(:I* *PROLOG* ◊M(M.M &_Find_Buffer◊)◊+4) [..O
				    !* Select *PROLOG* Buffer. !
    ZJ				    !* Make sure pointer at end of Buffer. !
    G3				    !* Insert Region into *PROLOG* Buffer. !
    0				    !* Nothing changed in Buffer. !
    ≤				    !* Restore Everything and Return. !

!& PROLOG Zap to PROLOG:! !& Call inferior PROLOG fork.
String argument is passed to the PROLOG fork.!
    [1 :I1≥←◊
    :FR◊			    !* Clear Mode Line. !
    :I*⊂Z◊ FS Echo Display◊	    !* Put cursor at bottom of screen. !
    0 FS Echo Char◊		    !* Dont echo when continued. !
    M(M.M^R_Invoke_Inferior◊)PROLOG◊≥1⊃M⊃◊⊃◊◊
    ≤				    !* Return. !

!^R PROLOG Zap for Compile:! !^R Call inferior PROLOG fork
If called with no argument, writes out *PROLOG* buffer
   to be passed to PROLOG to be compiled.
If called with argument, just calls PROLOG directly. !

   F←F→"N			    !* If with arg, !
     !""!
     M(M.M&_PROLOG_Zap_to_PROLOG◊)write('Resuming_PROLOG_...'), nl.◊'
   "#
     M(M.M&_PROLOG_Write_*PROLOG*_Buffer◊)
				    !* write out *PROLOG* Buffer. !
     !""""""""!
     M(M.M&_PROLOG_Zap_to_PROLOG◊)compile('-TEMP-.DEL'),(rename('-TEMP-.DEL',[]);see('-TEMP-.DEL'),see(user),rename('-TEMP-.DEL',[])).◊'
   ≤				    !* Return. !

!^R PROLOG Zap for Reconsult:! !^R Call inferior PROLOG fork
If called with no argument, writes out *PROLOG* buffer
   to be passed to PROLOG to be reconsulted.
Also useful for executing a lengthy piece of program.
If called with argument, just calls PROLOG directly. !

   F←F→"N			    !* If with arg, !
     !""!
     M(M.M&_PROLOG_Zap_to_PROLOG◊)write('Resuming_PROLOG_...'), nl.◊'
   "#
     M(M.M&_PROLOG_Write_*PROLOG*_Buffer◊)
				    !* write out *PROLOG* Buffer. !
     !""""""""!
     M(M.M&_PROLOG_Zap_to_PROLOG◊)reconsult('-TEMP-.DEL'),(rename('-TEMP-.DEL',[]);see('-TEMP-.DEL'),see(user),rename('-TEMP-.DEL',[])).◊'
   ≤				    !* Return. !

!& PROLOG Write *PROLOG* Buffer:! !& Write *PROLOG* to temporary file. !

    Q:.B(:I* *PROLOG* ◊M(M.M &_Find_Buffer◊)◊+4) [..O
				    !* Select *PROLOG* Buffer. !

    F[D FILE◊			    !* Save Default File Name. !
    FS MSName◊FS DSName◊	    !* File goes on Current Directory. !
    ET -TEMP-.DEL◊		    !* Set up Output File Name. !
    EI HP EF◊			    !* Write Buffer. !
    F]D FILE◊			    !* Restore Default File Name. !
    HK				    !* Clear Buffer. !
    ]..O◊			    !* Restore Old Buffer. !
    ≤

!^R PROLOG End of Clause:! !^R Go to the end of a PROLOG clause.
A PROLOG clause ends with a period at the end of the buffer
or followed by either one of blank, tab, CR, LF, or %.
Repeats given arg times.  Negative arg is not allowed. !

(F←F→"E 1'"# →') M(M.M&_PROLOG_End_of_Clause◊)
≤

!^R PROLOG Center Comment:! !^R Center comment filling % both sides!

q◊Fill_Column◊[1		    !* Fill Column in Q1 !
:l-@fα_%≥⊃	◊k		    !* Squeeze trailing blanks, tabs and %s!
0l@fα_%≥⊃	◊k		    !* Squeeze leading blanks, tabs and %s!
i__◊				    !* Two blanks!
:l				    !* Go to line end!
i__◊				    !* Two blanks!
fsshpos◊[2			    !* Horizontal position in Q3!
q1-q2/2-1,≡%i			    !* Fill %s !
fsshpos◊u2			    !* Horizontal position in Q2!
0l				    !* Goto beginning of line!
q1-q2,≡%i			    !* Fill %s!
]2]1				    !* Restore registers!
≤				    !* Return!

!& PROLOG End of Clause:! !S Go to the end of a PROLOG clause.
Repeats number of arg times.
If search fails, returns precomma arg (default -1).
Otherwise, returns 0.!

[1
→<				    !* Repeat for given arg. !
    (:S⋃;∂⋃|∂.◊)U1		    !* Search next comment, quote or period !
    Q1"E			    !* If search fails: !
      F←F→-1"EFG -1≤'	    !*   With one arg, grumble & return -1. !
      "# ←≤''			    !*   Otherwise, return 1st arg. !
    %1"E(:S⋃M◊);!<!@>'	    !* If comment, find comment ender. !
    %1"E0A:I1(:S≥1◊);!<!@>'	    !* If quote, find another. !
    (Z-.)"E			    !* When end of buffer: !
      F←F→-1"FG -1≤'		    !*   With one arg, grumble & return -1. !
      "# ←≤''			    !*   Otherwise, return 1st arg. !
    (1A-≡%)"'N&(1A-33)"'G"N!<!@>'  !* If next is not % nor a control char !
				    !* nor a blank, not really end of term. !
    -AFα@#$^&*-+=`~<>/\.◊:"L!<!@>' !* If last is an ordinary special char,!
				    !* not really end either. !
   >				    !* Otherwise, loop counting down. !

0≤				    !* Return 0. !

!& PROLOG Beginning of Clause:! !S Go to the beginning of a PROLOG clause.
Repeats given arg times.!

!* to be implemented !
≤				    !* Return. !

!& PROLOG Find Meanful Character:! !& Skip blanks and comments.
Skip blanks, tabs, newlines and comments.
Return -1 if a meanful character is found, 0 otherwise.!

   < Z-.< 1A-≡_-1; C>
     Z-."E 0≤'
     1A-≡%"E
       :S⋃M◊"E 0≤ '"# !<!>''
     "# -1≤'>

!& Collect PROLOG Commands:! !& Collect all commands of some sort.
Collects all the commands in the buffer into a string,
and returns the string.  Point is not moved.
The kind of command is specified by the string arg.
Usually "public" or "mode" is expected.  General search string is allowed!

   .[0				    !* Q0 := Saved point!
   :I*◊[1			    !* Q1 := Result (initially empty)!
   [2 :I2≥←◊			    !* Q2 := String arg!
   M.M &_PROLOG_Find_Meanful_Character◊[3   !* Q3 := Macro def!
   M.M&_PROLOG_End_of_Clause◊[4
   [5

   J				    !* Go to the top of the buffer!

   < M3;			    !* Skip blanks and comments!
     (1A-≡:)↓(2A-≡-)"E	    !* If :- is found!
       .U5			    !* Save point!
       2C M3;			    !* Skip blanks and comments!
       (.,.+FQ2:FB≥2◊)"E !<!>'	    !* Check if it is the desired command!
       -1,1M4			    !* Go to the end of the clause!
       Z-.-1"G			    !* With enough room,!
         Q5,.+2 @X1		    !*   Copy the region + 2 chars and!
	 FQ1-2 :F¬1		    !*   Replace last 2 chars by NL!
       ◊'"#			    !* Otherwise,!
         Q5,.X1 :I1≥1		    !*   Copy the region and!
	 ◊'			    !*   insert NL!
      '"# -1,1M4:;'		    !* Try next clause!
   >

   F←F→"N			    !* With arg!
     (Q1 M(M.M &_Sort_String◊)
     s≥2$m(m.m&_PROLOG_Find_Meanful_Character$)◊
     1m(m.m&_PROLOG_End_of_Clause$)w◊l◊)U1' !* Sort lines in Q1!

   Q0J				    !* Restore point!
   Q1≤				    !* Return!

!& Sort String:! !& Sort string in the numerical argument and return it.
String arguments are passed to the teco sorter as it is.!

   FS Q VECTOR◊[..O		    !* Make qvector and select it!
   →[1				    !* Q1 := String to be sorted!
   G1				    !* Copy the string there!
   ⊂≥←◊≥←◊≥←◊		    !* Do sort!
   HX*≤			    !* Return sorted string!

!List PROLOG Commands:! !C List all PROLOG commands in the buffer.
The kind of command is specified by the string arg.!

   (F← m(m.m &_Collect_PROLOG_Commands◊)≥←◊)[0
   FT≥0Done
   ◊
   ≤

!Collect PROLOG Commands:! !C Collect all PROLOG commands in the buffer.
Collect all the mode declarations in the buffer into buffer *PROLOG*.
The *PROLOG* buffer is cleared before insertion by default.
With non-zero numerical argument, declarations are appended to the buffer.
The *PROLOG* buffer is selected after the insertion.
With non-zero pre-comma argument, the original buffer is selected.
The kind of command is specified by the string arg.!

   (F← m(m.m &_Collect_PROLOG_Commands◊)≥←◊)[0
   F[D File◊			    !* Save Teco Default Filename!
   Q◊Buffer_Name◊[1		    !* Save current Buffer's Name!
   M(M.M Select_Buffer◊) *PROLOG*◊
				    !* Select or Create *PROLOG* Buffer!
   F←F→"E HK'			    !* With no arg, clear buffer!
   "# →"E HK''			    !* With zero arg, clear too!
   ZJW				    !* Goto the end of the buffer!
   G0				    !* Yank mode declarations!
   F←F→-1"G ←"N		    !* With non-zero precomma argument!
     M(M.M Select_Buffer◊) ≥1◊''   !* Return to original buffer!
   ≤				    !* Return!

!List Public Declarations:! !C List all public declarations.
List all the public declarations in the buffer.!

   (F← m(m.m List_PROLOG_Commands◊)public◊)
   ≤

!Collect Public Declarations:! !C Collect all public declarations.
Collect all the public declarations in the buffer into buffer *PROLOG*.
The *PROLOG* buffer is cleared before insertion by default.
With numerical argument, declarations are appended to the buffer.!

   (F← m(m.m Collect_PROLOG_Commands◊)public◊
   ≤				    !* Return!

!List Mode Declarations:! !C List all mode declarations.
List all the mode declarations in the buffer.!

   (F← m(m.m List_PROLOG_Commands◊)mode◊)
   ≤

!Collect Mode Declarations:! !C Collect all mode declarations.
Collect all the mode declarations in the buffer into buffer *PROLOG*.
The *PROLOG* buffer is cleared before insertion by default.
With numerical argument, declarations are appended to the buffer.!

   (F← m(m.m Collect_PROLOG_Commands◊)mode◊
   ≤				    !* Return!

!List Operator Declarations:! !C List all operator declarations.
List all the operator declarations in the buffer.!

   (F← m(m.m List_PROLOG_Commands◊)op◊)
   ≤

!Collect Operator Declarations:! !C Collect all operator declarations.
Collect all the operator declarations in the buffer into buffer *PROLOG*.
The *PROLOG* buffer is cleared before insertion by default.
With numerical argument, declarations are appended to the buffer.!

   (F← m(m.m Collect_PROLOG_Commands◊)op◊
   ≤				    !* Return!
	!* --TECO-- Library for PROLOG Editing System by T.Chikayama!

	!~FILENAME~:! !Package for programming in PROLOG!
	PROLOG

	!& Setup PROLOG Library:! !& Set up environment for editing PROLOG codes.
	Make PROLOG buffer for later use.!

	F[D File◊ !* Save Teco Default Filename. !
	1,:I*PROLOG◊M(M.M &_Find_Buffer◊)"L !* If no PROLOG buffer yet,!
	Q◊Buffer_Name◊[0 !* Save current buffer's name. !
	M(M.M Select_Buffer◊) PROLOG◊ !* Create PROLOG buffer. !
	M(M.M PROLOG_Mode◊) !* Put in PROLOG Mode. !
	M(M.M Select_Buffer◊) ≥0◊ ' !* restore previous buffer. !

	]0 F]D File◊ !* Restore saved Registers. !

	≤ !* Return. !

	!PROLOG Mode:! !C Set up for editing PROLOG code.
	Set syntax of "...", '...', %, [...], {...}, etc appropriately.
	{...}, [...], (...) flash matching delimiters according to
	setting of q◊Display Matching Paren◊ and q◊Permit UnMatched Paren◊.
	Define several PROLOG-oriented command keys.!

	m(m.m_&_Init_Buffer_Locals◊) !* Discard locals of old mode, and set: !
	M.Q..D◊ !* Make a local qreg ..D !
	0FO..QPROLOG_..D◊F"N U..D' !* Dont copy ..D if dont have to !
	"#w :i..D ≥..D◊ !* Copy ..D so we dont side effect !
	Q..DM.VPROLOG_..D◊ !* Remember this for next time !
	5≡% :f¬..D_;◊ ! % starts comment !
	5≡, :f¬..D__◊ ! , is whitespace !
	5≡; :f¬..D__◊ ! ; is whitespace !
	5≡" :f¬..D_\|◊ ! double quotes and !
	5≡' :f¬..D_\|◊ ! quotes are like vertical bars !
	5≡\| :f¬..D_A◊ ! \|s are normal special characters !
	5≡[ :f¬..D_(◊ ! Brackets are like parens !
	5≡] :f¬..D_)[◊ ! Brackets are like parens !
	5≡{ :f¬..D_(◊ ! Braces are also like parens !
	5≡} :f¬..D_){◊' ! Braces are also like parens !
	1,(:i%◊)M.LComment_Start◊ ! Comment starts with % !
	1,(:i%_◊)M.LComment_Begin◊ ! Comment begins with %<Space> !
	1,(:i/8+18◊)M.LComment_Rounding◊w !* Comment rounding... !
	1,40m.LComment_Column◊w !* Set comment column !

	q◊Permit_Unmatched_Paren◊"l !* If user hasn't inhibited feature,!
	1,0m.L Permit_Unmatched_Paren◊' !* Inhibit unmatched parens !

	M.M ^R_Tab_to_Tab_Stop◊ M.Q≡I◊ !* <Tab> becomes ^R Tab to Tab Stop !
	1,Q⋂∫(1,Q.⋂∫ M.Q⋂∫◊W )M.Q .⋂∫◊ !* Exchange rubout flavors.!
	!* <Delete> hacks tabs !

	M.M ^R_Uppercase_Initial◊ M.Q..⋂c◊w !* M-c is standard M-C !
	M.M ^R_Center_Line◊ M.Q..⋂s◊w !* M-s is standard M-S !

	M.M ^R_PROLOG_Center_Comment◊ M.Q..⋂C◊w !* M-C !
	!* M.M ^R_PROLOG_Beginning_of_Clause◊ M.Q..⋂a◊w M-a !
	M.M ^R_PROLOG_End_of_Clause◊ M.Q..⋂e◊w !* M-e !
	M.M ^R_PROLOG_Zap_for_Reconsult◊ M.Q..⋂z◊ !* M-z !
	M.M ^R_PROLOG_Zap_for_Compile◊ M.Q..⋂Z◊ !* M-Z !
	M.M ^R_PROLOG_Save_Region◊ M.Q..⋂S◊ !* M-S !

	1M(M.M&_Set_Mode_Line◊)PROLOG◊ !* Set mode!
	≤ !* Done. !

	!^R PROLOG Save Region:! !^R Store Region between Mark and Point to PROLOG.
	Contents of PROLOG is to be passed to inferior PROLOG later.
	Stuff is appended to the contents of the PROLOG Buffer.
	If given argument (e.g. ≤^R Universal Argument≤), also select the buffer. !

	M(M.M &_PROLOG_Save_Region◊)
	F←F→"N M(M.M Select_Buffer◊) PROLOG◊ '


	!& PROLOG Save Region:! !S Store Region between Mark and Point to PROLOG.
	The Region is appended to the contents of the PROLOG Buffer.
	A pair of arguments may be given instead of the Mark,
	if called from a Teco program. !

	F[VB◊ F[VZ◊ !* Save Virtual Bounds. !
	F←F→"E :⊗,.' "# F←' F· FS Boundaries◊ !* Bind them to the Region. !
	Q..O[3 !* Save Region in Q Register 3. !
	Q:.B(:I* PROLOG ◊M(M.M &_Find_Buffer◊)◊+4) [..O
	!* Select PROLOG Buffer. !
	ZJ !* Make sure pointer at end of Buffer. !
	G3 !* Insert Region into PROLOG Buffer. !
	0 !* Nothing changed in Buffer. !
	≤ !* Restore Everything and Return. !

	!& PROLOG Zap to PROLOG:! !& Call inferior PROLOG fork.
	String argument is passed to the PROLOG fork.!
	[1 :I1≥←◊
	:FR◊ !* Clear Mode Line. !
	:I⊂Z◊ FS Echo Display◊ ! Put cursor at bottom of screen. !
	0 FS Echo Char◊ !* Dont echo when continued. !
	M(M.M^R_Invoke_Inferior◊)PROLOG◊≥1⊃M⊃◊⊃◊◊
	≤ !* Return. !

	!^R PROLOG Zap for Compile:! !^R Call inferior PROLOG fork
	If called with no argument, writes out PROLOG buffer
	to be passed to PROLOG to be compiled.
	If called with argument, just calls PROLOG directly. !

	F←F→"N !* If with arg, !
	!""!
	M(M.M&_PROLOG_Zap_to_PROLOG◊)write('Resuming_PROLOG_...'), nl.◊'
	"#
	M(M.M&_PROLOG_Write_PROLOG_Buffer◊)
	!* write out PROLOG Buffer. !
	!""""""""!
	M(M.M&_PROLOG_Zap_to_PROLOG◊)compile('-TEMP-.DEL'),(rename('-TEMP-.DEL',[]);see('-TEMP-.DEL'),see(user),rename('-TEMP-.DEL',[])).◊'
	≤ !* Return. !

	!^R PROLOG Zap for Reconsult:! !^R Call inferior PROLOG fork
	If called with no argument, writes out PROLOG buffer
	to be passed to PROLOG to be reconsulted.
	Also useful for executing a lengthy piece of program.
	If called with argument, just calls PROLOG directly. !

	F←F→"N !* If with arg, !
	!""!
	M(M.M&_PROLOG_Zap_to_PROLOG◊)write('Resuming_PROLOG_...'), nl.◊'
	"#
	M(M.M&_PROLOG_Write_PROLOG_Buffer◊)
	!* write out PROLOG Buffer. !
	!""""""""!
	M(M.M&_PROLOG_Zap_to_PROLOG◊)reconsult('-TEMP-.DEL'),(rename('-TEMP-.DEL',[]);see('-TEMP-.DEL'),see(user),rename('-TEMP-.DEL',[])).◊'
	≤ !* Return. !

	!& PROLOG Write PROLOG Buffer:! !& Write PROLOG to temporary file. !

	Q:.B(:I* PROLOG ◊M(M.M &_Find_Buffer◊)◊+4) [..O
	!* Select PROLOG Buffer. !

	F[D FILE◊ !* Save Default File Name. !
	FS MSName◊FS DSName◊ !* File goes on Current Directory. !
	ET -TEMP-.DEL◊ !* Set up Output File Name. !
	EI HP EF◊ !* Write Buffer. !
	F]D FILE◊ !* Restore Default File Name. !
	HK !* Clear Buffer. !
	]..O◊ !* Restore Old Buffer. !
	≤

	!^R PROLOG End of Clause:! !^R Go to the end of a PROLOG clause.
	A PROLOG clause ends with a period at the end of the buffer
	or followed by either one of blank, tab, CR, LF, or %.
	Repeats given arg times. Negative arg is not allowed. !

	(F←F→"E 1'"# →') M(M.M&_PROLOG_End_of_Clause◊)
	≤

	!^R PROLOG Center Comment:! !^R Center comment filling % both sides!

	q◊Fill_Column◊[1 !* Fill Column in Q1 !
	:l-@fα_%≥⊃ ◊k !* Squeeze trailing blanks, tabs and %s!
	0l@fα_%≥⊃ ◊k !* Squeeze leading blanks, tabs and %s!
	i__◊ !* Two blanks!
	:l !* Go to line end!
	i__◊ !* Two blanks!
	fsshpos◊[2 !* Horizontal position in Q3!
	q1-q2/2-1,≡%i !* Fill %s !
	fsshpos◊u2 !* Horizontal position in Q2!
	0l !* Goto beginning of line!
	q1-q2,≡%i !* Fill %s!
	]2]1 !* Restore registers!
	≤ !* Return!

	!& PROLOG End of Clause:! !S Go to the end of a PROLOG clause.
	Repeats number of arg times.
	If search fails, returns precomma arg (default -1).
	Otherwise, returns 0.!

	[1
	→< !* Repeat for given arg. !
	(:S⋃;∂⋃\|∂.◊)U1 !* Search next comment, quote or period !
	Q1"E !* If search fails: !
	F←F→-1"EFG -1≤' !* With one arg, grumble & return -1. !
	"# ←≤'' !* Otherwise, return 1st arg. !
	%1"E(:S⋃M◊);!<!@>' !* If comment, find comment ender. !
	%1"E0A:I1(:S≥1◊);!<!@>' !* If quote, find another. !
	(Z-.)"E !* When end of buffer: !
	F←F→-1"FG -1≤' !* With one arg, grumble & return -1. !
	"# ←≤'' !* Otherwise, return 1st arg. !
	(1A-≡%)"'N&(1A-33)"'G"N!<!@>' !* If next is not % nor a control char !
	!* nor a blank, not really end of term. !
	-AFα@#$^&-+=`~<>/\.◊:"L!<!@>' ! If last is an ordinary special char,!
	!* not really end either. !
	> !* Otherwise, loop counting down. !

	0≤ !* Return 0. !

	!& PROLOG Beginning of Clause:! !S Go to the beginning of a PROLOG clause.
	Repeats given arg times.!

	!* to be implemented !
	≤ !* Return. !

	!& PROLOG Find Meanful Character:! !& Skip blanks and comments.
	Skip blanks, tabs, newlines and comments.
	Return -1 if a meanful character is found, 0 otherwise.!

	< Z-.< 1A-≡_-1; C>
	Z-."E 0≤'
	1A-≡%"E
	:S⋃M◊"E 0≤ '"# !<!>''
	"# -1≤'>

	!& Collect PROLOG Commands:! !& Collect all commands of some sort.
	Collects all the commands in the buffer into a string,
	and returns the string. Point is not moved.
	The kind of command is specified by the string arg.
	Usually "public" or "mode" is expected. General search string is allowed!

	.[0 !* Q0 := Saved point!
	:I◊[1 ! Q1 := Result (initially empty)!
	[2 :I2≥←◊ !* Q2 := String arg!
	M.M &_PROLOG_Find_Meanful_Character◊[3 !* Q3 := Macro def!
	M.M&_PROLOG_End_of_Clause◊[4
	[5

	J !* Go to the top of the buffer!

	< M3; !* Skip blanks and comments!
	(1A-≡:)↓(2A-≡-)"E !* If :- is found!
	.U5 !* Save point!
	2C M3; !* Skip blanks and comments!
	(.,.+FQ2:FB≥2◊)"E !<!>' !* Check if it is the desired command!
	-1,1M4 !* Go to the end of the clause!
	Z-.-1"G !* With enough room,!
	Q5,.+2 @X1 !* Copy the region + 2 chars and!
	FQ1-2 :F¬1 !* Replace last 2 chars by NL!
	◊'"# !* Otherwise,!
	Q5,.X1 :I1≥1 !* Copy the region and!
	◊' !* insert NL!
	'"# -1,1M4:;' !* Try next clause!
	>

	F←F→"N !* With arg!
	(Q1 M(M.M &_Sort_String◊)
	s≥2$m(m.m&_PROLOG_Find_Meanful_Character$)◊
	1m(m.m&_PROLOG_End_of_Clause$)w◊l◊)U1' !* Sort lines in Q1!

	Q0J !* Restore point!
	Q1≤ !* Return!

	!& Sort String:! !& Sort string in the numerical argument and return it.
	String arguments are passed to the teco sorter as it is.!

	FS Q VECTOR◊[..O !* Make qvector and select it!
	→[1 !* Q1 := String to be sorted!
	G1 !* Copy the string there!
	⊂≥←◊≥←◊≥←◊ !* Do sort!
	HX≤ ! Return sorted string!

	!List PROLOG Commands:! !C List all PROLOG commands in the buffer.
	The kind of command is specified by the string arg.!

	(F← m(m.m &_Collect_PROLOG_Commands◊)≥←◊)[0
	FT≥0Done
	◊
	≤

	!Collect PROLOG Commands:! !C Collect all PROLOG commands in the buffer.
	Collect all the mode declarations in the buffer into buffer PROLOG.
	The PROLOG buffer is cleared before insertion by default.
	With non-zero numerical argument, declarations are appended to the buffer.
	The PROLOG buffer is selected after the insertion.
	With non-zero pre-comma argument, the original buffer is selected.
	The kind of command is specified by the string arg.!

	(F← m(m.m &_Collect_PROLOG_Commands◊)≥←◊)[0
	F[D File◊ !* Save Teco Default Filename!
	Q◊Buffer_Name◊[1 !* Save current Buffer's Name!
	M(M.M Select_Buffer◊) PROLOG◊
	!* Select or Create PROLOG Buffer!
	F←F→"E HK' !* With no arg, clear buffer!
	"# →"E HK'' !* With zero arg, clear too!
	ZJW !* Goto the end of the buffer!
	G0 !* Yank mode declarations!
	F←F→-1"G ←"N !* With non-zero precomma argument!
	M(M.M Select_Buffer◊) ≥1◊'' !* Return to original buffer!
	≤ !* Return!

	!List Public Declarations:! !C List all public declarations.
	List all the public declarations in the buffer.!

	(F← m(m.m List_PROLOG_Commands◊)public◊)
	≤

	!Collect Public Declarations:! !C Collect all public declarations.
	Collect all the public declarations in the buffer into buffer PROLOG.
	The PROLOG buffer is cleared before insertion by default.
	With numerical argument, declarations are appended to the buffer.!

	(F← m(m.m Collect_PROLOG_Commands◊)public◊
	≤ !* Return!

	!List Mode Declarations:! !C List all mode declarations.
	List all the mode declarations in the buffer.!

	(F← m(m.m List_PROLOG_Commands◊)mode◊)
	≤

	!Collect Mode Declarations:! !C Collect all mode declarations.
	Collect all the mode declarations in the buffer into buffer PROLOG.
	The PROLOG buffer is cleared before insertion by default.
	With numerical argument, declarations are appended to the buffer.!

	(F← m(m.m Collect_PROLOG_Commands◊)mode◊
	≤ !* Return!

	!List Operator Declarations:! !C List all operator declarations.
	List all the operator declarations in the buffer.!

	(F← m(m.m List_PROLOG_Commands◊)op◊)
	≤

	!Collect Operator Declarations:! !C Collect all operator declarations.
	Collect all the operator declarations in the buffer into buffer PROLOG.
	The PROLOG buffer is cleared before insertion by default.
	With numerical argument, declarations are appended to the buffer.!

	(F← m(m.m Collect_PROLOG_Commands◊)op◊
	≤ !* Return!