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| author | Ludovic Courtès <ludo@gnu.org> | 2017-11-09 23:31:18 +0100 |
|---|---|---|
| committer | Ludovic Courtès <ludo@gnu.org> | 2017-11-09 23:54:47 +0100 |
| commit | dc856223f5eab57d8a4881782ec0f50abd12afa3 (patch) | |
| tree | 69eac3c1c442bcb076c4f12ae965b0ba6b8cf356 /guix/ui.scm | |
| parent | a2985bb101faac9f085176e0329488b91b81dfb5 (diff) | |
| download | gnu-guix-dc856223f5eab57d8a4881782ec0f50abd12afa3.tar gnu-guix-dc856223f5eab57d8a4881782ec0f50abd12afa3.tar.gz | |
ui: Add an 'unbound-variable' exception printer.
* guix/ui.scm (print-unbound-variable-error): New variable.
Use it as the 'unbound-variable' printer.
Diffstat (limited to 'guix/ui.scm')
| -rw-r--r-- | guix/ui.scm | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/guix/ui.scm b/guix/ui.scm index 9f790b6451..05782a537e 100644 --- a/guix/ui.scm +++ b/guix/ui.scm @@ -149,6 +149,18 @@ messages." (report-error args ...) (exit 1))) +(define (print-unbound-variable-error port key args default-printer) + ;; Print unbound variable errors more nicely, and in the right language. + (match args + ((proc message (variable) _ ...) + ;; We can always omit PROC because when it's useful (i.e., different from + ;; "module-lookup"), it gets displayed before. + (format port (G_ "~a: unbound variable") variable)) + (_ + (default-printer)))) + +(set-exception-printer! 'unbound-variable print-unbound-variable-error) + (define (make-user-module modules) "Return a new user module with the additional MODULES loaded." ;; Module in which the machine description file is loaded. |