rust/tests/ui/format_push_string.rs

37 lines
896 B
Rust

#![warn(clippy::format_push_string)]
fn main() {
let mut string = String::new();
string += &format!("{:?}", 1234);
string.push_str(&format!("{:?}", 5678));
}
mod issue9493 {
pub fn u8vec_to_hex(vector: &Vec<u8>, upper: bool) -> String {
let mut hex = String::with_capacity(vector.len() * 2);
for byte in vector {
hex += &(if upper {
format!("{byte:02X}")
} else {
format!("{byte:02x}")
});
}
hex
}
pub fn other_cases() {
let mut s = String::new();
// if let
s += &(if let Some(_a) = Some(1234) {
format!("{}", 1234)
} else {
format!("{}", 1234)
});
// match
s += &(match Some(1234) {
Some(_) => format!("{}", 1234),
None => format!("{}", 1234),
});
}
}