rust/tests/compile-fail/print.rs

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#![feature(plugin)]
#![plugin(clippy)]
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#![deny(print_stdout, use_debug)]
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use std::fmt::{Debug, Display, Formatter, Result};
#[allow(dead_code)]
struct Foo;
impl Display for Foo {
fn fmt(&self, f: &mut Formatter) -> Result {
write!(f, "{:?}", 43.1415)
//~^ ERROR use of `Debug`-based formatting
}
}
impl Debug for Foo {
fn fmt(&self, f: &mut Formatter) -> Result {
// ok, we can use `Debug` formatting in `Debug` implementations
write!(f, "{:?}", 42.718)
}
}
fn main() {
println!("Hello"); //~ERROR use of `println!`
print!("Hello"); //~ERROR use of `print!`
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print!("Hello {}", "World"); //~ERROR use of `print!`
print!("Hello {:?}", "World");
//~^ ERROR use of `print!`
//~| ERROR use of `Debug`-based formatting
print!("Hello {:#?}", "#orld");
//~^ ERROR use of `print!`
//~| ERROR use of `Debug`-based formatting
assert_eq!(42, 1337);
vec![1, 2];
}