hare

commit bae714096f1a0571b82261d33644223fb2957cc2
parent 2ec551087972ddb3535b0147de2c9c4b0620ee73
Author: Drew DeVault <sir@cmpwn.com>
Date:   Sun,  7 Mar 2021 09:24:57 -0500

strings: add try_from_utf8

Diffstat:
M
strings/utf8.ha
 | 
10
++++++++++

1 file changed, 10 insertions(+), 0 deletions(-)
diff --git a/strings/utf8.ha b/strings/utf8.ha
@@ -21,6 +21,16 @@ export fn from_utf8(in: []u8) str = {
 	return s;
 };
 
+// Converts a byte slice into a string. If the slice contains invalid UTF-8
+// sequences, void is returned instead.
+export fn try_from_utf8(in: []u8) (str | utf8::invalid) = {
+	let s = from_utf8_unsafe(in);
+	if (!utf8::valid(s)) {
+		return utf8::invalid;
+	};
+	return s;
+};
+
 // Converts a string to a UTF-8 slice.
 export fn to_utf8(in: str) []u8 = *(&in: *[]u8);