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| author | Ludovic Courtès <ludo@gnu.org> | 2018-07-02 14:49:14 +0200 |
|---|---|---|
| committer | Ludovic Courtès <ludo@gnu.org> | 2018-07-02 15:28:35 +0200 |
| commit | 223fa5b327b0892cf45d22e4a9fbfb06164e409d (patch) | |
| tree | 7784b68f3697da889cb063007d4e9c3a59583054 | |
| parent | 3059a35afe3f0ff2561870e0a0fb21e03fc3247a (diff) | |
| download | gnu-guix-223fa5b327b0892cf45d22e4a9fbfb06164e409d.tar gnu-guix-223fa5b327b0892cf45d22e4a9fbfb06164e409d.tar.gz | |
utils: Micro-optimize 'source-properties->location'.
* guix/utils.scm (source-properties->location): Destructure LOC with
'match', adding a fast path without 'assq-ref' calls.
| -rw-r--r-- | guix/utils.scm | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/guix/utils.scm b/guix/utils.scm index 9fbb95d31c..f934b6ed13 100644 --- a/guix/utils.scm +++ b/guix/utils.scm @@ -782,12 +782,19 @@ be determined." "Return a location object based on the info in LOC, an alist as returned by Guile's `source-properties', `frame-source', `current-source-location', etc." - (let ((file (assq-ref loc 'filename)) - (line (assq-ref loc 'line)) - (col (assq-ref loc 'column))) - ;; In accordance with the GCS, start line and column numbers at 1. Note - ;; that unlike LINE and `port-column', COL is actually 1-indexed here... - (location file (and line (+ line 1)) col))) + ;; In accordance with the GCS, start line and column numbers at 1. Note + ;; that unlike LINE and `port-column', COL is actually 1-indexed here... + (match loc + ((('line . line) ('column . col) ('filename . file)) ;common case + (and file line col + (make-location file (+ line 1) col))) + (#f + #f) + (_ + (let ((file (assq-ref loc 'filename)) + (line (assq-ref loc 'line)) + (col (assq-ref loc 'column))) + (location file (and line (+ line 1)) col))))) (define (location->source-properties loc) "Return the source property association list based on the info in LOC, |