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Auto merge of #91359 - dtolnay:args, r=Mark-Simulacrum
Emit simpler code from format_args I made this PR so that `cargo expand` dumps a less overwhelming amount of formatting-related code. <br> `println!("rust")` **Before:** ```rust { ::std::io::_print(::core::fmt::Arguments::new_v1(&["rust\n"], &match () { _args => [], })); }; ``` **After:** ```rust { ::std::io::_print(::core::fmt::Arguments::new_v1(&["rust\n"], &[])); }; ``` `println!("{}", x)` **Before:** ```rust { ::std::io::_print(::core::fmt::Arguments::new_v1( &["", "\n"], &match (&x,) { _args => [::core::fmt::ArgumentV1::new( _args.0, ::core::fmt::Display::fmt, )], }, )); }; ``` **After:** ```rust { ::std::io::_print(::core::fmt::Arguments::new_v1( &["", "\n"], &[::core::fmt::ArgumentV1::new(&x, ::core::fmt::Display::fmt)], )); }; ```
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1 changed files with 10 additions and 1 deletions
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@ -6,5 +6,14 @@ LL | write!(f, "{}", self.to_string())
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= note: `-D clippy::to-string-in-display` implied by `-D warnings`
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error: aborting due to previous error
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error: unnecessary use of `to_string`
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--> $DIR/to_string_in_display.rs:55:50
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LL | Self::E(string) => write!(f, "E {}", string.to_string()),
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= note: `-D clippy::unnecessary-to-owned` implied by `-D warnings`
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= note: this error originates in the macro `$crate::format_args` (in Nightly builds, run with -Z macro-backtrace for more info)
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error: aborting due to 2 previous errors
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