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Diffstat (limited to 'compiler/rustc_error_codes/src/error_codes/E0593.md')
-rw-r--r-- | compiler/rustc_error_codes/src/error_codes/E0593.md | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/compiler/rustc_error_codes/src/error_codes/E0593.md b/compiler/rustc_error_codes/src/error_codes/E0593.md new file mode 100644 index 000000000..1902d73f4 --- /dev/null +++ b/compiler/rustc_error_codes/src/error_codes/E0593.md @@ -0,0 +1,24 @@ +You tried to supply an `Fn`-based type with an incorrect number of arguments +than what was expected. + +Erroneous code example: + +```compile_fail,E0593 +fn foo<F: Fn()>(x: F) { } + +fn main() { + // [E0593] closure takes 1 argument but 0 arguments are required + foo(|y| { }); +} +``` + +You have to provide the same number of arguments as expected by the `Fn`-based +type. So to fix the previous example, we need to remove the `y` argument: + +``` +fn foo<F: Fn()>(x: F) { } + +fn main() { + foo(|| { }); // ok! +} +``` |