Iterator::copied was introduced in Rust 1.35, whereas serde_test
currently supports a minimum compiler version of 1.13.
error: used `cloned` where `copied` could be used instead
--> serde_test/src/de.rs:49:29
|
49 | self.tokens.first().cloned()
| ^^^^^^ help: try: `copied`
|
note: the lint level is defined here
--> serde_test/src/lib.rs:149:52
|
149 | #![cfg_attr(feature = "cargo-clippy", deny(clippy, clippy_pedantic))]
| ^^^^^^^^^^^^^^^
= note: `#[deny(clippy::cloned_instead_of_copied)]` implied by `#[deny(clippy::pedantic)]`
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cloned_instead_of_copied
warning: lint `clippy::filter_map` has been removed: this lint has been replaced by `manual_filter_map`, a more specific lint
--> serde_derive/src/lib.rs:42:5
|
42 | clippy::filter_map,
| ^^^^^^^^^^^^^^^^^^
|
= note: `#[warn(renamed_and_removed_lints)]` on by default
warning: lint `clippy::filter_map` has been removed: this lint has been replaced by `manual_filter_map`, a more specific lint
--> serde_derive/src/lib.rs:42:5
|
42 | clippy::filter_map,
| ^^^^^^^^^^^^^^^^^^
error: used `flat_map` where `filter_map` could be used instead
--> serde_derive/src/bound.rs:52:10
|
52 | .flat_map(|field| from_field(&field.attrs))
| ^^^^^^^^ help: try: `filter_map`
|
note: the lint level is defined here
--> serde_derive/src/lib.rs:18:22
|
18 | #![deny(clippy::all, clippy::pedantic)]
| ^^^^^^^^^^^^^^^^
= note: `#[deny(clippy::flat_map_option)]` implied by `#[deny(clippy::pedantic)]`
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#flat_map_option
error: used `flat_map` where `filter_map` could be used instead
--> serde_derive/src/bound.rs:74:10
|
74 | .flat_map(|variant| from_variant(&variant.attrs))
| ^^^^^^^^ help: try: `filter_map`
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#flat_map_option
error: the feature `non_ascii_idents` has been stable since 1.53.0 and no longer requires an attribute to enable
--> test_suite/tests/test_gen.rs:6:43
|
6 | #![cfg_attr(feature = "unstable", feature(non_ascii_idents))]
| ^^^^^^^^^^^^^^^^
|
note: the lint level is defined here
--> test_suite/tests/test_gen.rs:5:9
|
5 | #![deny(warnings)]
| ^^^^^^^^
= note: `#[deny(stable_features)]` implied by `#[deny(warnings)]`
warning: lint `safe_packed_borrows` has been renamed to `unaligned_references`
--> test_suite/tests/test_macros.rs:1926:8
|
1926 | #[deny(safe_packed_borrows)]
| ^^^^^^^^^^^^^^^^^^^ help: use the new name: `unaligned_references`
|
= note: `#[warn(renamed_and_removed_lints)]` on by default
https://github.com/rust-lang/rust-clippy/issues/7054
error: all if blocks contain the same code at the end
--> serde_derive/src/de.rs:2160:5
|
2160 | / &fallthrough_arm_tokens
2161 | | };
| |_____^
|
note: the lint level is defined here
--> serde_derive/src/lib.rs:18:9
|
18 | #![deny(clippy::all, clippy::pedantic)]
| ^^^^^^^^^^^
= note: `#[deny(clippy::branches_sharing_code)]` implied by `#[deny(clippy::all)]`
= note: The end suggestion probably needs some adjustments to use the expression result correctly
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#branches_sharing_code
help: consider moving the end statements out like this
|
2160 | }
2161 | &fallthrough_arm_tokens;
|
This is equivalent to looping 0..=u8::MAX, except that `..=` syntax is
not supported on old rustc and `...` syntax is not supported on new
rustc, so loop it is.
https://github.com/rust-lang/rust-clippy/issues/6797
error[E0382]: use of partially moved value: `self`
--> serde_derive/src/internals/attr.rs:71:24
|
71 | self.value.map(|value| (self.tokens, value))
| ----^^^^^^^----------------------
| | | |
| | | use occurs due to use in closure
| | value used here after partial move
| `self.value` partially moved due to this method call
|
note: this function takes ownership of the receiver `self`, which moves `self.value`
--> /home/david/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/core/src/option.rs:485:38
|
485 | pub fn map<U, F: FnOnce(T) -> U>(self, f: F) -> Option<U> {
| ^^^^
= note: partial move occurs because `self.value` has type `std::option::Option<T>`, which does not implement the `Copy` trait
Unlike expr macros, macros in type position in a derive input are rare
enough that it's not worth supporting for an issue that has such an easy
workaround (just replace `Self` in the macro input with your type name).
I think there is no ambiguity in from_str as a method name so "choose a
less ambiguous method name" is unnecessary, and it can't be a FromStr
impl in this case because FromStr's error type cannot borrow from the
input string slice.
warning: method `from_str` can be confused for the standard trait method `std::str::FromStr::from_str`
--> serde_derive_internals/src/case.rs:50:5
|
50 | / pub fn from_str(rename_all_str: &str) -> Result<Self, ParseError> {
51 | | for (name, rule) in RENAME_RULES {
52 | | if rename_all_str == *name {
53 | | return Ok(*rule);
... |
58 | | })
59 | | }
| |_____^
|
= note: `#[warn(clippy::should_implement_trait)]` on by default
= help: consider implementing the trait `std::str::FromStr` or choosing a less ambiguous method name
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#should_implement_trait
This usage is fine. It's mirroring trait signatures in syn::visit::Visit.
error: unused `self` argument
--> serde_derive/src/bound.rs:241:24
|
241 | fn visit_macro(&mut self, _mac: &'ast syn::Macro) {}
| ^^^^^^^^^
|
note: the lint level is defined here
--> serde_derive/src/lib.rs:18:22
|
18 | #![deny(clippy::all, clippy::pedantic)]
| ^^^^^^^^^^^^^^^^
= note: `#[deny(clippy::unused_self)]` implied by `#[deny(clippy::pedantic)]`
= help: consider refactoring to a associated function
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unused_self
The builtin visitor is fairly expensive to compile (3700 lines of code),
particularly if something else in the dependency graph also enables
syn/full. For the usage in serde_derive, it turns out to be easy to
replace.
The implied lifetime bound on T only works on 1.31+. Older versions fail
with:
error[E0309]: the parameter type `T` may not live long enough
--> serde/src/private/de.rs:2548:37
|
2548 | pub struct Borrowed<'de, T: ?Sized>(pub &'de T);
| -- ^^^^^^^^^^
| |
| help: consider adding an explicit lifetime bound `T: 'de`...
|
note: ...so that the reference type `&'de T` does not outlive the data it points at
--> serde/src/private/de.rs:2548:37
|
2548 | pub struct Borrowed<'de, T: ?Sized>(pub &'de T);
| ^^^^^^^^^^
The BorrowedDeserializer was added in #1917, but only makes sense for
&str and &[u8], not for u64 which also needs to be have an
IdentifierDeserializer impl.
We shouldn't try to use the same macro for public and private types. The
API for a private type can usually be pared much further down to save
compile time, such as Debug and Copy and Clone impls.
All of these macros are only used internally within the serde crate.
There is no need for them to have #[macro_export] and need to be hidden
from docs.
David Tolnay