[elpa] externals/ediprolog cfcdf9e428: Merge remote-tracking branch 'upstream/ediprolog/main' into externals/ediprolog

[Stefan Monnier]

branch: externals/ediprolog
commit cfcdf9e42821d246b7fbc84877aa4ecacc184a1c
Merge: 40c2693389 dc0e51ba57
Author: Stefan Monnier <monnier@iro.umontreal.ca>
Commit: Stefan Monnier <monnier@iro.umontreal.ca>

    Merge remote-tracking branch 'upstream/ediprolog/main' into 
externals/ediprolog
---
 README.md     |   8 ++++----
 ediprolog.el  |  36 +++++++++++++++++++++++++-----------
 factorial.png | Bin 60804 -> 39199 bytes
 3 files changed, 29 insertions(+), 15 deletions(-)

diff --git a/README.md b/README.md
index 406a356fd1..fdf591393d 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ After you have installed ediprolog, you can customize it with:
 
 The two most important configuration options are:
 
-   - `ediprolog-system`, either `scryer` or `swi`
+   - `ediprolog-system`, either `scryer` (default) or `swi`
    - `ediprolog-program`, the path of the Prolog executable.
 
 # Usage
@@ -51,11 +51,11 @@ Prolog process, and you interact with the process in the 
current
 buffer as on a terminal. Queries start with "?-" or ":-", possibly
 preceded by "%" and whitespace. An example of a query is:
 
-    %?- member(X, [a,b,c]).
+    %?- member(X, "abc").
 
 If you press F10 when point is on that query, you get:
 
-    %?- member(X, [a,b,c]).
+    %?- member(X, "abc").
     %@    X = a
     %@ ;  X = b
     %@ ;  X = c
@@ -95,7 +95,7 @@ versions 26.1 and&nbsp;27.0.50.
 # Screenshot
 
 Here is a sample interaction, using
-[CLP(FD)&nbsp;constraints](https://www.metalevel.at/prolog/clpfd) to
+[CLP(ℤ)&nbsp;constraints](https://www.metalevel.at/prolog/clpz) to
 relate a number to its factorial:
 
 ![Factorial](factorial.png)
diff --git a/ediprolog.el b/ediprolog.el
index 1362a18354..9ded453544 100644
--- a/ediprolog.el
+++ b/ediprolog.el
@@ -4,7 +4,7 @@
 
 ;; Author: Markus Triska <triska@metalevel.at>
 ;; Keywords: languages, processes
-;; Version: 2.1
+;; Version: 2.2
 ;; Homepage: https://www.metalevel.at/ediprolog/
 
 ;; This file is free software; you can redistribute it and/or modify
@@ -39,7 +39,7 @@
 ;;
 ;; The two most important configuration options are:
 ;;
-;;    - `ediprolog-system', either 'scryer or 'swi
+;;    - `ediprolog-system', either 'scryer (default) or 'swi
 ;;    - `ediprolog-program', the path of the Prolog executable.
 
 ;; Usage
@@ -53,11 +53,11 @@
 ;; Queries start with "?-" or ":-", possibly preceded by "%" and
 ;; whitespace. An example of a query is (without leading ";;"):
 ;;
-;;   %?- member(X, [a,b,c]).
+;;   %?- member(X, "abc").
 ;;
 ;; If you press F10 when point is on that query, you get:
 ;;
-;;   %?- member(X, [a,b,c]).
+;;   %?- member(X, "abc").
 ;;   %@    X = a
 ;;   %@ ;  X = b
 ;;   %@ ;  X = c
@@ -93,7 +93,7 @@
 
 ;;; Code:
 
-(defconst ediprolog-version "2.1")
+(defconst ediprolog-version "2.2")
 
 (defgroup ediprolog nil
   "Transparent interaction with Prolog."
@@ -273,9 +273,9 @@ set_prolog_flag(toplevel_prompt, '%s').\n" 
(ediprolog-prompt)))))
   ;; success (i.e., consulted without errors), or still an incomplete
   ;; line that starts with a comment character
   (unless (or (string-match "^[\t ]*\\(?:%.*\\)?\\'" str)
-              (let ((success "true."))
-                (and (<= (length str) (length success))
-                     (string= str (substring success 0 (length str))))))
+              (string-prefix-p str "true.")
+              ;; newer versions of Scryer Prolog prepend 3 spaces to "true."
+              (string-prefix-p str "   true."))
     (setq ediprolog-consult-window (display-buffer ediprolog-consult-buffer))
     (set-window-dedicated-p ediprolog-consult-window t)
     (fit-window-to-buffer ediprolog-consult-window (/ (frame-height) 2))))
@@ -370,9 +370,19 @@ arguments, equivalent to `ediprolog-remove-interactions'."
       (end-of-line)
       (insert "\n" ediprolog-indent-prefix ediprolog-prefix)
       (ediprolog-interact
-       (format "%s\n" (mapconcat #'identity
+       (format "%s\n"
+               (if (eq ediprolog-system 'scryer)
+                   ;; Scryer Prolog emits no additional indicators
+                   ;; when a query spans multiple lines, so we send
+                   ;; the query verbatim.
+                   query
+                 ;; For other Prolog systems, we merge the query into
+                 ;; a single line. The drawback of this approach is
+                 ;; that single-line comments at the end of a line are
+                 ;; not handled correctly.
+                 (mapconcat #'identity
                                  ;; `%' can precede each query line
-                                 (split-string query "\n[ \t%]*") " ")))
+                                 (split-string query "\n[ \t%]*") " "))))
       (when handle
         (undo-amalgamate-change-group (cdr handle))))
     t))
@@ -491,7 +501,11 @@ operates on the region."
             (and buffer-file-name
                  (not (equal (file-remote-p ediprolog-temp-file)
                              (file-remote-p buffer-file-name)))))
-    (setq ediprolog-temp-file (make-nearby-temp-file "ediprolog")))
+    (setq ediprolog-temp-file
+          (funcall (if (fboundp 'make-nearby-temp-file)
+                       'make-nearby-temp-file
+                     'make-temp-file)
+                   "ediprolog")))
   (let ((start (if (and transient-mark-mode mark-active)
                    (region-beginning) (point-min)))
         (end (if (and transient-mark-mode mark-active)
diff --git a/factorial.png b/factorial.png
index b85c8c0f05..653a4df7d7 100644
Binary files a/factorial.png and b/factorial.png differ