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utils: Generalise unstringify-pairs.

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This commit is contained in:
Sergiu Ivanov 2020-02-26 15:51:00 +01:00
parent 83a87acfc5
commit 018e3c6976
1 changed files with 11 additions and 6 deletions
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17
utils.rkt
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@ -16,7 +16,7 @@
[stringify-variable-mapping (-> variable-mapping? string-variable-mapping?)]
[string->any (-> string? any/c)]
[read-org-table (-> string? (listof any/c))]
[unstringify-pairs (-> (listof (general-pair/c string? string?))
[unstringify-pairs (-> (listof (general-pair/c string? any/c))
(listof (general-pair/c symbol? any/c)))]
[read-org-variable-mapping (-> string? variable-mapping?)]
[update-vertices/unweighted (-> graph? (-> any/c any/c) graph?)])
@ -183,16 +183,21 @@
(or/c (list/c key-contract val-contract)
(cons/c key-contract val-contract)))
;;; Given a list of pairs of strings, converts the first element of
;;; each pair to a string, and reads the second element with
;;; string->any.
;;; Given a list of pairs of strings and some other values (possibly
;;; strings), converts the first element of each pair to a string, and
;;; reads the second element with string->any or keeps it as is if it
;;; is not a string.
(define (unstringify-pairs pairs)
(for/list ([p pairs])
(match p
[(list key val)
(cons (string->symbol key) (string->any val))]
(cons (string->symbol key) (if (string? val)
(string->any val)
val))]
[(cons key val) ; also handle improper pairs
(cons (string->symbol key) (string->any val))])))
(cons (string->symbol key) (if (string? val)
(string->any val)
val))])))
;;; Reads a variable mapping from a string, such as the one which
;;; Org-mode produces from tables.