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Fixed chop-suffix

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This commit is contained in:
Dmitry Boulytchev 2022-09-13 09:19:28 +03:00
parent e5c5f914bd
commit 98804770e6
5 changed files with 20 additions and 4 deletions
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14
stdlib/Matcher.lama
View file

@ -46,6 +46,14 @@ fun createMatcher (buf, pos, line, col) {
}
fun matchString (s) {
fun min (x, y) {
if x < y then x else y fi
}
-- printf ("Matching string %s against %s...\n", s, substring (buf, pos, min (10, buf.length - pos)));
if s.length > rest ()
then Fail (sprintf ("""%s"" expected", s), line, col)
elif matchSubString (buf, s, pos) then Succ (s, shift (s.length))
@ -55,7 +63,13 @@ fun createMatcher (buf, pos, line, col) {
fun matchRegexp (r) {
var n;
fun min (x, y) {
if x < y then x else y fi
}
-- printf ("Matching regexp %s against %s...\n", r.string, substring (buf, pos, min (10, buf.length - pos)));
if (n := regexpMatch (r[0], buf, pos)) >= 0
then Succ (substring (buf, pos, n), shift (n))
else Fail (sprintf ("%s expected", r[1]), line, col)

4
stdlib/Ostap.lama
View file

@ -44,6 +44,7 @@ public fun memo (f) {
if log then printf ("Applying memoized parser to %s\n", s.string) fi;
case findMap (deref (t), s) of
None ->
if log then printf ("New stream item\n") fi;
t ::= addMap (deref (t), s, [addSet (emptySet (compare), k), emptySet (fun (r1, r2) {
case [r1, r2] of
[Fail (_, _, _), Fail (_, _, _)] -> 0
@ -51,7 +52,7 @@ public fun memo (f) {
esac
})]);
f (fun (r) {
r := lookupMemo (restab, r);
--r := lookupMemo (restab, r);
if log then printf ("Running continuation with result %s\n", r.string) fi;
case findMap (deref (t), s) of
Some ([ks, rs]) ->
@ -74,6 +75,7 @@ public fun memo (f) {
}
public fun token (x) {
-- printf ("token: %s\n", x.string);
case x of
#str -> memo $ fun (k) {fun (s) {k $ matchString (s, x)}}
| _ -> memo $ fun (k) {fun (s) {k $ matchRegexp (s, x)}}