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Code Issues 1 Releases Wiki Activity

peg replacement functions have access to captures

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When peg/replace or peg/replace-all are given a function to serve as the text
replacement, any captures produced by the PEG are passed as additional
arguments to that function.
This commit is contained in:
Ian Henry
2023-04-23 09:09:14 -07:00
parent 485099fd6e
commit 9dc7e8ed3a
5 changed files with 56 additions and 21 deletions
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18
test/suite0008.janet
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@@ -340,6 +340,7 @@ neldb\0\0\0\xD8\x05printG\x01\0\xDE\xDE\xDE'\x03\0marshal_tes/\x02
(check-replacer "aba" "" "ababababababa")
(check-replacer "aba" string/ascii-upper "ababababababa")
(check-replacer "aba" 123 "ababababababa")
(assert (= (string (peg/replace-all ~(set "ab") string/ascii-upper "abcaa"))
"ABcAA")
"peg/replace-all cfunction")
@@ -347,6 +348,23 @@ neldb\0\0\0\xD8\x05printG\x01\0\xDE\xDE\xDE'\x03\0marshal_tes/\x02
"abcaa")
"peg/replace-all function")
(defn peg-test [name f peg subst text expected]
(assert (= (string (f peg subst text)) expected) name))
(peg-test "peg/replace has access to captures"
peg/replace
~(sequence "." (capture (set "ab")))
(fn [str char] (string/format "%s -> %s, " str (string/ascii-upper char)))
".a.b.c"
".a -> A, .b.c")
(peg-test "peg/replace-all has access to captures"
peg/replace-all
~(sequence "." (capture (set "ab")))
(fn [str char] (string/format "%s -> %s, " str (string/ascii-upper char)))
".a.b.c"
".a -> A, .b -> B, .c")
# Peg bug
(assert (deep= @[] (peg/match '(any 1) @"")) "peg empty pattern 1")
(assert (deep= @[] (peg/match '(any 1) (buffer))) "peg empty pattern 2")