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Support unsyntax-splicing in vector quasisyntax

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If the sub-template inside #(...) is unsyntax-splicing instead
of list, produce the template #((~@! . ????)) instead of calling
(datum->syntax o list->vector o syntax->list). Fixes #2402.
This commit is contained in:
shhyou 2018-11-29 14:47:25 -06:00 committed by shuhung
parent 5454b7d809
commit 8043768b4c
2 changed files with 11 additions and 7 deletions
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3
pkgs/racket-test-core/tests/racket/stx.rktl
View File

@ -2289,8 +2289,9 @@
(test '#(1 2 3 4 5) syntax->datum (quasisyntax #(a (unsyntax b) c ...)))
(test '#s(PS 1 2) syntax->datum (quasisyntax #s(PS a (unsyntax b))))
(test '#s(PS 1 2 3 4 5) syntax->datum (quasisyntax #s(PS a (unsyntax b) c ...)))
#|
(test '#(1 2 3 4 5) syntax->datum (quasisyntax #(a (unsyntax b) (unsyntax-splicing ds))))
(test '#(3 4 5) syntax->datum (quasisyntax #((unsyntax-splicing ds))))
#|
(test '#s(PS 1 2 3 4 5) syntax->datum
(quasisyntax #s(PS a (unsyntax b) (unsyntax-splicing ds))))
|#))

15
racket/collects/racket/private/qqstx.rkt
View File

@ -241,12 +241,15 @@
depth
same-k
(lambda (v bindings)
(convert-k (datum->syntax
stx
(list->vector (syntax->list v))
stx
stx)
bindings)))]
(let ([stx-lst/#f (syntax->list v)])
(convert-k (datum->syntax
stx
(if stx-lst/#f
(list->vector stx-lst/#f)
(vector-immutable (cons #'~@! v)))
stx
stx)
bindings))))]
[(prefab-struct-key (syntax-e stx))
(let* ([d (syntax-e stx)]
[key (prefab-struct-key d)]