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Clean up E0743 explanation #75007

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Aug 1, 2020
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Clean up E0743 explanation #75007

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11 changes: 5 additions & 6 deletions src/librustc_error_codes/error_codes/E0743.md
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Expand Up @@ -8,10 +8,9 @@ Erroneous code example:
fn foo2(x: u8, y: &...) {} // error!
```

Only foreign functions can use the C-variadic type (`...`).
In such functions, `...` may only occur non-nested.
That is, `y: &'a ...` is not allowed.
Only foreign functions can use the C-variadic type (`...`). In such functions,
`...` may only occur non-nested. That is, `y: &'a ...` is not allowed.

A C-variadic type is used to give an undefined number
of parameters to a given function (like `printf` in C).
The equivalent in Rust would be to use macros directly.
A C-variadic type is used to give an undefined number of parameters to a given
function (like `printf` in C). The equivalent in Rust would be to use macros
directly (like `println!` for example).