35 lines
839 B
Rust
35 lines
839 B
Rust
#![allow(unused, dead_code)]
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#![warn(clippy::format_collect)]
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fn hex_encode(bytes: &[u8]) -> String {
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bytes.iter().map(|b| format!("{b:02X}")).collect()
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//~^ ERROR: use of `format!` to build up a string from an iterator
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}
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#[rustfmt::skip]
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fn hex_encode_deep(bytes: &[u8]) -> String {
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bytes.iter().map(|b| {{{{{ format!("{b:02X}") }}}}}).collect()
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//~^ ERROR: use of `format!` to build up a string from an iterator
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}
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macro_rules! fmt {
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($x:ident) => {
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format!("{x:02X}", x = $x)
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};
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}
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fn from_macro(bytes: &[u8]) -> String {
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bytes.iter().map(|x| fmt!(x)).collect()
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}
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fn with_block() -> String {
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(1..10)
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//~^ ERROR: use of `format!` to build up a string from an iterator
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.map(|s| {
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let y = 1;
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format!("{s} {y}")
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})
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.collect()
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}
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fn main() {}
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