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Syntax objects print with source locations

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* module/system/syntax.scm (print-syntax): Print source locations.
This commit is contained in:
Andy Wingo 2021-03-04 13:20:13 +01:00
parent bd93eaf7cc
commit 2c3029e660
1 changed files with 11 additions and 2 deletions
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13
module/system/syntax.scm
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@ -1,6 +1,6 @@
;;; Syntax utilities
;;; Copyright (C) 2017 Free Software Foundation, Inc.
;;; Copyright (C) 2017, 2021 Free Software Foundation, Inc.
;;;; This library is free software; you can redistribute it and/or
;;;; modify it under the terms of the GNU Lesser General Public
@ -30,4 +30,13 @@
(define (print-syntax obj port)
;; FIXME: Use syntax->datum instad of syntax-expression, when
;; syntax->datum can operate on new syntax objects.
(format port "#<syntax ~s>" (syntax-expression obj)))
(let ((src (syntax-sourcev obj)))
(if src
(format port "#<syntax:~a:~a:~a ~s>"
(cond
((vector-ref src 0) => basename)
(else "unknown file"))
(1+ (vector-ref src 1))
(vector-ref src 2)
(syntax-expression obj))
(format port "#<syntax ~s>" (syntax-expression obj)))))