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use wrapping instead of saturaing subtraction

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Luke Boswell 2024-09-29 14:38:06 +10:00
parent 3fa9712d81
commit aec3af667d
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1 changed files with 2 additions and 2 deletions
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4
crates/compiler/builtins/roc/Str.roc
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@ -1066,7 +1066,7 @@ dropPrefix : Str, Str -> Str
dropPrefix = \haystack, prefix ->
if Str.startsWith haystack prefix then
start = Str.countUtf8Bytes prefix
len = Num.subSaturated (Str.countUtf8Bytes haystack) start
len = Num.subWrap (Str.countUtf8Bytes haystack) start
substringUnsafe haystack start len
else
@ -1083,7 +1083,7 @@ dropSuffix : Str, Str -> Str
dropSuffix = \haystack, suffix ->
if Str.endsWith haystack suffix then
start = 0
len = Num.subSaturated (Str.countUtf8Bytes haystack) (Str.countUtf8Bytes suffix)
len = Num.subWrap (Str.countUtf8Bytes haystack) (Str.countUtf8Bytes suffix)
substringUnsafe haystack start len
else