From: Elichai Turkel Date: Mon, 1 Apr 2019 18:50:02 +0000 (+0300) Subject: Removed the use of expect from CodingStandardsRust X-Git-Tag: tor-0.4.1.1-alpha~113^2 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=0ebe290198ca852c27422fb3a82670f113f78727;p=thirdparty%2Ftor.git Removed the use of expect from CodingStandardsRust --- diff --git a/doc/HACKING/CodingStandardsRust.md b/doc/HACKING/CodingStandardsRust.md index fc562816db..b570e10dc7 100644 --- a/doc/HACKING/CodingStandardsRust.md +++ b/doc/HACKING/CodingStandardsRust.md @@ -256,7 +256,7 @@ Here are some additional bits of advice and rules: or 2) should fail (i.e. in a unittest). You SHOULD NOT use `unwrap()` anywhere in which it is possible to handle the - potential error with either `expect()` or the eel operator, `?`. + potential error with the eel operator, `?` or another non panicking way. For example, consider a function which parses a string into an integer: fn parse_port_number(config_string: &str) -> u16 { @@ -264,12 +264,12 @@ Here are some additional bits of advice and rules: } There are numerous ways this can fail, and the `unwrap()` will cause the - whole program to byte the dust! Instead, either you SHOULD use `expect()` + whole program to byte the dust! Instead, either you SHOULD use `ok()` (or another equivalent function which will return an `Option` or a `Result`) and change the return type to be compatible: fn parse_port_number(config_string: &str) -> Option { - u16::from_str_radix(config_string, 10).expect("Couldn't parse port into a u16") + u16::from_str_radix(config_string, 10).ok() } or you SHOULD use `or()` (or another similar method):