typed-work
Matthew Butterick 10 years ago
parent 144536fb27
commit e64469788b

@ -16,6 +16,9 @@
(define (txexpr-tag? x) (define (txexpr-tag? x)
(symbol? x)) (symbol? x))
(define (txexpr-tags? x)
(and (list? x) (andmap txexpr-tag? x)))
(define (txexpr-attr? x) (define (txexpr-attr? x)
(match x (match x
[(list (? symbol?) (? string?)) #t] [(list (? symbol?) (? string?)) #t]

@ -8,6 +8,7 @@
[txexpr? predicate/c] [txexpr? predicate/c]
[txexpr-short? predicate/c] [txexpr-short? predicate/c]
[txexpr-tag? predicate/c] [txexpr-tag? predicate/c]
[txexpr-tags? predicate/c]
[txexpr-attr? predicate/c] [txexpr-attr? predicate/c]
[txexpr-attrs? predicate/c] [txexpr-attrs? predicate/c]
[txexpr-element? predicate/c] [txexpr-element? predicate/c]

@ -137,6 +137,11 @@ Predicates for @racket[_txexpr]s that implement this grammar:
@deftogether[( @deftogether[(
@defproc[
(txexpr-tags?
[v any/c])
boolean?]
@defproc[ @defproc[
(txexpr-attrs? (txexpr-attrs?
[v any/c]) [v any/c])
@ -147,7 +152,7 @@ boolean?]
[v any/c]) [v any/c])
boolean?] boolean?]
)] )]
Shorthand for @code{(listof txexpr-attr?)} and @code{(listof txexpr-element?)}. Shorthand for @code{(listof txexpr-tag?)}, @code{(listof txexpr-attr?)}, and @code{(listof txexpr-element?)}.

@ -35,6 +35,9 @@
(check-false (txexpr-tag? "foo")) (check-false (txexpr-tag? "foo"))
(check-false (txexpr-tag? 3)) (check-false (txexpr-tag? 3))
(check-false (txexpr-tags? 'foo))
(check-true (txexpr-tags? '(foo bar)))
(check-true (txexpr-attr? '(key "value"))) (check-true (txexpr-attr? '(key "value")))
(check-false (txexpr-attr? '(key "value" "another"))) (check-false (txexpr-attr? '(key "value" "another")))
(check-false (txexpr-attr? '(key 0 "value"))) (check-false (txexpr-attr? '(key 0 "value")))

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