diff options
| -rw-r--r-- | guix/read-print.scm | 22 | ||||
| -rw-r--r-- | tests/read-print.scm | 7 |
2 files changed, 25 insertions, 4 deletions
diff --git a/guix/read-print.scm b/guix/read-print.scm index 8a720ef2ef..ccddca732d 100644 --- a/guix/read-print.scm +++ b/guix/read-print.scm @@ -1,5 +1,5 @@ ;;; GNU Guix --- Functional package management for GNU -;;; Copyright © 2021-2022 Ludovic Courtès <ludo@gnu.org> +;;; Copyright © 2021-2023 Ludovic Courtès <ludo@gnu.org> ;;; ;;; This file is part of GNU Guix. ;;; @@ -488,6 +488,19 @@ each line except the first one (they're assumed to be already there)." (8 "#o")) (number->string integer base))) +(define %special-non-extended-symbols + ;; Special symbols that can be written without the #{...}# notation for + ;; extended symbols: 1+, 1-, 123/, etc. + (make-regexp "^[0-9]+[[:graph:]]+$" regexp/icase)) + +(define (symbol->display-string symbol context) + "Return the most appropriate representation of SYMBOL, resorting to extended +symbol notation only when strictly necessary." + (let ((str (symbol->string symbol))) + (if (regexp-exec %special-non-extended-symbols str) + str ;no need for the #{...}# notation + (object->string symbol)))) + (define* (pretty-print-with-comments port obj #:key (format-comment @@ -561,7 +574,8 @@ FORMAT-VERTICAL-SPACE; a useful value of 'canonicalize-vertical-space'." ((? string? str) (>= (+ (string-width str) 2 indent) max-width)) ((? symbol? symbol) - (>= (+ (string-width (symbol->string symbol)) indent) + (>= (+ (string-width (symbol->display-string symbol context)) + indent) max-width)) ((? boolean?) (>= (+ 2 indent) max-width)) @@ -647,7 +661,7 @@ FORMAT-VERTICAL-SPACE; a useful value of 'canonicalize-vertical-space'." ;; and following arguments are less indented. (let* ((lead (special-form-lead head context)) (context (cons head context)) - (head (symbol->string head)) + (head (symbol->display-string head (cdr context))) (total (length arguments))) (unless delimited? (display " " port)) (display "(" port) @@ -727,6 +741,8 @@ FORMAT-VERTICAL-SPACE; a useful value of 'canonicalize-vertical-space'." (printed-string obj context)) ((integer? obj) (integer->string obj context)) + ((symbol? obj) + (symbol->display-string obj context)) (else (object->string obj)))) (len (string-width str))) diff --git a/tests/read-print.scm b/tests/read-print.scm index ea52a52145..79a4101be6 100644 --- a/tests/read-print.scm +++ b/tests/read-print.scm @@ -1,5 +1,5 @@ ;;; GNU Guix --- Functional package management for GNU -;;; Copyright © 2021-2022 Ludovic Courtès <ludo@gnu.org> +;;; Copyright © 2021-2023 Ludovic Courtès <ludo@gnu.org> ;;; ;;; This file is part of GNU Guix. ;;; @@ -143,6 +143,11 @@ expressions." #:max-width 11) (test-pretty-print "\ +(begin + 1+ 1- 123/ 456* + (1+ 41))") + +(test-pretty-print "\ (lambda (x y) ;; This is a procedure. (let ((z (+ x y))) |