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#![warn(clippy::format_push_string)]
fn main() {
let mut string = String::new();
string += &format!("{:?}", 1234);
//~^ ERROR: `format!(..)` appended to existing `String`
string.push_str(&format!("{:?}", 5678));
//~^ ERROR: `format!(..)` appended to existing `String`
}
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 {
//~^ ERROR: `format!(..)` appended to existing `String`
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) {
//~^ ERROR: `format!(..)` appended to existing `String`
format!("{}", 1234)
} else {
format!("{}", 1234)
});
// match
s += &(match Some(1234) {
//~^ ERROR: `format!(..)` appended to existing `String`
Some(_) => format!("{}", 1234),
None => format!("{}", 1234),
});
}
}
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