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Diffstat (limited to 'src/doc/book/listings/ch19-advanced-features/no-listing-18-returns-closure/output.txt')
| -rw-r--r-- | src/doc/book/listings/ch19-advanced-features/no-listing-18-returns-closure/output.txt | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/doc/book/listings/ch19-advanced-features/no-listing-18-returns-closure/output.txt b/src/doc/book/listings/ch19-advanced-features/no-listing-18-returns-closure/output.txt new file mode 100644 index 000000000..d6fffc967 --- /dev/null +++ b/src/doc/book/listings/ch19-advanced-features/no-listing-18-returns-closure/output.txt @@ -0,0 +1,16 @@ +$ cargo build + Compiling functions-example v0.1.0 (file:///projects/functions-example) +error[E0746]: return type cannot have an unboxed trait object + --> src/lib.rs:1:25 + | +1 | fn returns_closure() -> dyn Fn(i32) -> i32 { + | ^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time + | + = note: for information on `impl Trait`, see <https://doc.rust-lang.org/book/ch10-02-traits.html#returning-types-that-implement-traits> +help: use `impl Fn(i32) -> i32` as the return type, as all return paths are of type `[closure@src/lib.rs:2:5: 2:14]`, which implements `Fn(i32) -> i32` + | +1 | fn returns_closure() -> impl Fn(i32) -> i32 { + | ~~~~~~~~~~~~~~~~~~~ + +For more information about this error, try `rustc --explain E0746`. +error: could not compile `functions-example` due to previous error |