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checker: check option fn returning error (fix #17423) (#17438)

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yuyi
2023-03-02 21:49:50 +08:00
committed by GitHub
parent 8f7c35552d
commit 17000ef7b6
49 changed files with 129 additions and 106 deletions
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4
vlib/builtin/string.v
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@@ -910,7 +910,7 @@ pub fn (s string) substr(start int, end int) string {
// version of `substr()` that is used in `a[start..end] or {`
// return an error when the index is out of range
[direct_array_access]
pub fn (s string) substr_with_check(start int, end int) ?string {
pub fn (s string) substr_with_check(start int, end int) !string {
if start > end || start > s.len || end > s.len || start < 0 || end < 0 {
return error('substr(${start}, ${end}) out of bounds (len=${s.len})')
}
@@ -1606,7 +1606,7 @@ fn (s string) at(idx int) byte {
// return an error when the index is out of range
fn (s string) at_with_check(idx int) ?u8 {
if idx < 0 || idx >= s.len {
return error('string index out of range')
return none
}
unsafe {
return s.str[idx]