142 lines
2.6 KiB
Rust
142 lines
2.6 KiB
Rust
//@aux-build:option_helpers.rs
|
||
|
||
#![warn(clippy::all, clippy::pedantic)]
|
||
#![allow(
|
||
clippy::disallowed_names,
|
||
clippy::default_trait_access,
|
||
clippy::let_underscore_untyped,
|
||
clippy::missing_docs_in_private_items,
|
||
clippy::missing_safety_doc,
|
||
clippy::non_ascii_literal,
|
||
clippy::new_without_default,
|
||
clippy::needless_pass_by_value,
|
||
clippy::needless_lifetimes,
|
||
clippy::print_stdout,
|
||
clippy::must_use_candidate,
|
||
clippy::use_self,
|
||
clippy::useless_format,
|
||
clippy::wrong_self_convention,
|
||
clippy::unused_async,
|
||
clippy::unused_self,
|
||
unused
|
||
)]
|
||
|
||
#[macro_use]
|
||
extern crate option_helpers;
|
||
|
||
use std::collections::BTreeMap;
|
||
use std::collections::HashMap;
|
||
use std::collections::HashSet;
|
||
use std::collections::VecDeque;
|
||
use std::ops::Mul;
|
||
use std::rc::{self, Rc};
|
||
use std::sync::{self, Arc};
|
||
|
||
use option_helpers::{IteratorFalsePositives, IteratorMethodFalsePositives};
|
||
|
||
struct Lt<'a> {
|
||
foo: &'a u32,
|
||
}
|
||
|
||
impl<'a> Lt<'a> {
|
||
// The lifetime is different, but that’s irrelevant; see issue #734.
|
||
#[allow(clippy::needless_lifetimes)]
|
||
pub fn new<'b>(s: &'b str) -> Lt<'b> {
|
||
unimplemented!()
|
||
}
|
||
}
|
||
|
||
struct Lt2<'a> {
|
||
foo: &'a u32,
|
||
}
|
||
|
||
impl<'a> Lt2<'a> {
|
||
// The lifetime is different, but that’s irrelevant; see issue #734.
|
||
pub fn new(s: &str) -> Lt2 {
|
||
unimplemented!()
|
||
}
|
||
}
|
||
|
||
struct Lt3<'a> {
|
||
foo: &'a u32,
|
||
}
|
||
|
||
impl<'a> Lt3<'a> {
|
||
// The lifetime is different, but that’s irrelevant; see issue #734.
|
||
pub fn new() -> Lt3<'static> {
|
||
unimplemented!()
|
||
}
|
||
}
|
||
|
||
#[derive(Clone, Copy)]
|
||
struct U;
|
||
|
||
impl U {
|
||
fn new() -> Self {
|
||
U
|
||
}
|
||
// Ok because `U` is `Copy`.
|
||
fn to_something(self) -> u32 {
|
||
0
|
||
}
|
||
}
|
||
|
||
struct V<T> {
|
||
_dummy: T,
|
||
}
|
||
|
||
impl<T> V<T> {
|
||
fn new() -> Option<V<T>> {
|
||
None
|
||
}
|
||
}
|
||
|
||
struct AsyncNew;
|
||
|
||
impl AsyncNew {
|
||
async fn new() -> Option<Self> {
|
||
None
|
||
}
|
||
}
|
||
|
||
struct BadNew;
|
||
|
||
impl BadNew {
|
||
fn new() -> i32 {
|
||
0
|
||
}
|
||
}
|
||
|
||
struct T;
|
||
|
||
impl Mul<T> for T {
|
||
type Output = T;
|
||
// No error, obviously.
|
||
fn mul(self, other: T) -> T {
|
||
self
|
||
}
|
||
}
|
||
|
||
/// Checks implementation of `FILTER_NEXT` lint.
|
||
#[rustfmt::skip]
|
||
fn filter_next() {
|
||
let v = vec![3, 2, 1, 0, -1, -2, -3];
|
||
|
||
// Multi-line case.
|
||
let _ = v.iter().filter(|&x| {
|
||
*x < 0
|
||
}
|
||
).next();
|
||
|
||
// Check that we don't lint if the caller is not an `Iterator`.
|
||
let foo = IteratorFalsePositives { foo: 0 };
|
||
let _ = foo.filter().next();
|
||
|
||
let foo = IteratorMethodFalsePositives {};
|
||
let _ = foo.filter(42).next();
|
||
}
|
||
|
||
fn main() {
|
||
filter_next();
|
||
}
|