59 lines
1.1 KiB
Rust
59 lines
1.1 KiB
Rust
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#![allow(unused, clippy::print_literal, clippy::write_literal)]
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#![warn(clippy::print_in_format_impl)]
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use std::fmt::{Debug, Display, Error, Formatter};
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macro_rules! indirect {
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() => {{ println!() }};
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}
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macro_rules! nested {
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($($tt:tt)*) => {
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$($tt)*
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};
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}
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struct Foo;
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impl Debug for Foo {
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fn fmt(&self, f: &mut Formatter) -> Result<(), Error> {
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static WORKS_WITH_NESTED_ITEMS: bool = true;
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print!("{}", 1);
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println!("{}", 2);
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eprint!("{}", 3);
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eprintln!("{}", 4);
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nested! {
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println!("nested");
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};
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write!(f, "{}", 5);
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writeln!(f, "{}", 6);
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indirect!();
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Ok(())
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}
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}
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impl Display for Foo {
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fn fmt(&self, f: &mut Formatter) -> Result<(), Error> {
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print!("Display");
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write!(f, "Display");
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Ok(())
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}
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}
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struct UnnamedFormatter;
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impl Debug for UnnamedFormatter {
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fn fmt(&self, _: &mut Formatter) -> Result<(), Error> {
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println!("UnnamedFormatter");
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Ok(())
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}
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}
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fn main() {
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print!("outside fmt");
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println!("outside fmt");
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eprint!("outside fmt");
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eprintln!("outside fmt");
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}
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