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Show example with a derive

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David Tolnay 2017-01-12 20:58:47 -08:00
parent 618a2f20ef
commit 51c52d5280
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1 changed files with 30 additions and 11 deletions
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@ -25,8 +25,11 @@ colorized. Install with `pip install Pygments`.
`$ cat src/main.rs` `$ cat src/main.rs`
> ```rust > ```rust
#[derive(Debug)]
struct S;
fn main() { fn main() {
println!("Hello, world!"); println!("{:?}", S);
} }
``` ```
@ -39,17 +42,33 @@ fn main() {
use std::prelude::v1::*; use std::prelude::v1::*;
#[macro_use] #[macro_use]
extern crate std as std; extern crate std as std;
struct S;
#[automatically_derived]
#[allow(unused_qualifications)]
impl ::std::fmt::Debug for S {
fn fmt(&self, __arg_0: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
match *self {
S => {
let mut builder = __arg_0.debug_tuple("S");
builder.finish()
}
}
}
}
fn main() { fn main() {
::std::io::_print(::std::fmt::Arguments::new_v1({ ::io::_print(::std::fmt::Arguments::new_v1({
static __STATIC_FMTSTR: static __STATIC_FMTSTR:
&'static [&'static str] &'static [&'static str]
= =
&["Hello, world!\n"]; &["", "\n"];
__STATIC_FMTSTR __STATIC_FMTSTR
}, },
&match () { &match (&S,) {
() => [], (__arg0,) =>
})); [::std::fmt::ArgumentV1::new(__arg0,
::std::fmt::Debug::fmt)],
}));
} }
``` ```