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Diffstat (limited to 'compiler/rustc_error_codes/src/error_codes/E0743.md')
| -rw-r--r-- | compiler/rustc_error_codes/src/error_codes/E0743.md | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/compiler/rustc_error_codes/src/error_codes/E0743.md b/compiler/rustc_error_codes/src/error_codes/E0743.md new file mode 100644 index 000000000..ddd3136df --- /dev/null +++ b/compiler/rustc_error_codes/src/error_codes/E0743.md @@ -0,0 +1,16 @@ +The C-variadic type `...` has been nested inside another type. + +Erroneous code example: + +```compile_fail,E0743 +#![feature(c_variadic)] + +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. + +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). |