// aux-build:option_helpers.rs
-// compile-flags: --edition 2018
+// edition:2018
-#![warn(clippy::all, clippy::pedantic, clippy::option_unwrap_used)]
+#![warn(clippy::all, clippy::pedantic)]
#![allow(
clippy::blacklisted_name,
- unused,
- clippy::print_stdout,
+ clippy::default_trait_access,
+ clippy::missing_docs_in_private_items,
+ clippy::missing_safety_doc,
clippy::non_ascii_literal,
clippy::new_without_default,
- clippy::missing_docs_in_private_items,
clippy::needless_pass_by_value,
- clippy::default_trait_access,
+ clippy::needless_lifetimes,
+ clippy::print_stdout,
+ clippy::must_use_candidate,
clippy::use_self,
clippy::useless_format,
- clippy::wrong_self_convention
+ clippy::wrong_self_convention,
+ clippy::unused_self,
+ unused
)]
#[macro_use]
use option_helpers::IteratorFalsePositives;
-pub struct T;
-
-impl T {
- pub fn add(self, other: T) -> T {
- self
- }
-
- // no error, not public interface
- pub(crate) fn drop(&mut self) {}
-
- // no error, private function
- fn neg(self) -> Self {
- self
- }
-
- // no error, private function
- fn eq(&self, other: T) -> bool {
- true
- }
-
- // No error; self is a ref.
- fn sub(&self, other: T) -> &T {
- self
- }
-
- // No error; different number of arguments.
- fn div(self) -> T {
- self
- }
-
- // No error; wrong return type.
- fn rem(self, other: T) {}
-
- // Fine
- fn into_u32(self) -> u32 {
- 0
- }
-
- fn into_u16(&self) -> u16 {
- 0
- }
-
- fn to_something(self) -> u32 {
- 0
- }
-
- fn new(self) -> Self {
- unimplemented!();
- }
-}
-
struct Lt<'a> {
foo: &'a u32,
}
}
}
+struct T;
+
impl Mul<T> for T {
type Output = T;
// No error, obviously.
}
}
-/// Checks implementation of the following lints:
-/// * `OPTION_MAP_UNWRAP_OR`
-/// * `OPTION_MAP_UNWRAP_OR_ELSE`
-#[rustfmt::skip]
-fn option_methods() {
- let opt = Some(1);
-
- // Check `OPTION_MAP_UNWRAP_OR`.
- // Single line case.
- let _ = opt.map(|x| x + 1)
- // Should lint even though this call is on a separate line.
- .unwrap_or(0);
- // Multi-line cases.
- let _ = opt.map(|x| {
- x + 1
- }
- ).unwrap_or(0);
- let _ = opt.map(|x| x + 1)
- .unwrap_or({
- 0
- });
- // Single line `map(f).unwrap_or(None)` case.
- let _ = opt.map(|x| Some(x + 1)).unwrap_or(None);
- // Multi-line `map(f).unwrap_or(None)` cases.
- let _ = opt.map(|x| {
- Some(x + 1)
- }
- ).unwrap_or(None);
- let _ = opt
- .map(|x| Some(x + 1))
- .unwrap_or(None);
- // macro case
- let _ = opt_map!(opt, |x| x + 1).unwrap_or(0); // should not lint
-
- // Should not lint if not copyable
- let id: String = "identifier".to_string();
- let _ = Some("prefix").map(|p| format!("{}.{}", p, id)).unwrap_or(id);
- // ...but DO lint if the `unwrap_or` argument is not used in the `map`
- let id: String = "identifier".to_string();
- let _ = Some("prefix").map(|p| format!("{}.", p)).unwrap_or(id);
-
- // Check OPTION_MAP_UNWRAP_OR_ELSE
- // single line case
- let _ = opt.map(|x| x + 1)
- // Should lint even though this call is on a separate line.
- .unwrap_or_else(|| 0);
- // Multi-line cases.
- let _ = opt.map(|x| {
- x + 1
- }
- ).unwrap_or_else(|| 0);
- let _ = opt.map(|x| x + 1)
- .unwrap_or_else(||
- 0
- );
- // Macro case.
- // Should not lint.
- let _ = opt_map!(opt, |x| x + 1).unwrap_or_else(|| 0);
-
- // Issue #4144
- {
- let mut frequencies = HashMap::new();
- let word = "foo";
-
- frequencies
- .get_mut(word)
- .map(|count| {
- *count += 1;
- })
- .unwrap_or_else(|| {
- frequencies.insert(word.to_owned(), 1);
- });
- }
-}
-
/// Checks implementation of `FILTER_NEXT` lint.
#[rustfmt::skip]
fn filter_next() {
let v = vec![3, 2, 1, 0, -1, -2, -3];
- // Single-line case.
- let _ = v.iter().filter(|&x| *x < 0).next();
-
// Multi-line case.
let _ = v.iter().filter(|&x| {
*x < 0
}
).next();
- // Check that hat we don't lint if the caller is not an `Iterator`.
- let foo = IteratorFalsePositives { foo: 0 };
- let _ = foo.filter().next();
-}
-
-/// Checks implementation of `SEARCH_IS_SOME` lint.
-#[rustfmt::skip]
-fn search_is_some() {
- let v = vec![3, 2, 1, 0, -1, -2, -3];
- let y = &&42;
-
- // Check `find().is_some()`, single-line case.
- let _ = v.iter().find(|&x| *x < 0).is_some();
- let _ = (0..1).find(|x| **y == *x).is_some(); // one dereference less
- let _ = (0..1).find(|x| *x == 0).is_some();
- let _ = v.iter().find(|x| **x == 0).is_some();
-
- // Check `find().is_some()`, multi-line case.
- let _ = v.iter().find(|&x| {
- *x < 0
- }
- ).is_some();
-
- // Check `position().is_some()`, single-line case.
- let _ = v.iter().position(|&x| x < 0).is_some();
-
- // Check `position().is_some()`, multi-line case.
- let _ = v.iter().position(|&x| {
- x < 0
- }
- ).is_some();
-
- // Check `rposition().is_some()`, single-line case.
- let _ = v.iter().rposition(|&x| x < 0).is_some();
-
- // Check `rposition().is_some()`, multi-line case.
- let _ = v.iter().rposition(|&x| {
- x < 0
- }
- ).is_some();
-
// Check that we don't lint if the caller is not an `Iterator`.
let foo = IteratorFalsePositives { foo: 0 };
- let _ = foo.find().is_some();
- let _ = foo.position().is_some();
- let _ = foo.rposition().is_some();
+ let _ = foo.filter().next();
}
-#[allow(clippy::similar_names)]
fn main() {
- let opt = Some(0);
- let _ = opt.unwrap();
+ filter_next();
}
projects / rust.git / blobdiff