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#![feature(repr128, proc_macro_quote)]
#![allow(incomplete_features)]
#![allow(clippy::field_reassign_with_default)]
#![allow(clippy::eq_op)]
extern crate proc_macro;
use proc_macro::{quote, Delimiter, Group, Ident, Literal, Punct, Spacing, Span, TokenStream, TokenTree};
#[proc_macro_derive(DeriveSomething)]
pub fn derive(_: TokenStream) -> TokenStream {
// Should not trigger `used_underscore_binding`
let _inside_derive = 1;
assert_eq!(_inside_derive, _inside_derive);
let output = quote! {
// Should not trigger `useless_attribute`
#[allow(dead_code)]
extern crate rustc_middle;
};
output
}
#[proc_macro_derive(FieldReassignWithDefault)]
pub fn derive_foo(_input: TokenStream) -> TokenStream {
quote! {
#[derive(Default)]
struct A {
pub i: i32,
pub j: i64,
}
#[automatically_derived]
fn lint() {
let mut a: A = Default::default();
a.i = 42;
a;
}
}
}
#[proc_macro_derive(StructAUseSelf)]
pub fn derive_use_self(_input: TokenStream) -> proc_macro::TokenStream {
quote! {
struct A;
impl A {
fn new() -> A {
A
}
}
}
}
#[proc_macro_derive(ClippyMiniMacroTest)]
pub fn mini_macro(_: TokenStream) -> TokenStream {
quote!(
#[allow(unused)]
fn needless_take_by_value(s: String) {
println!("{}", s.len());
}
#[allow(unused)]
fn needless_loop(items: &[u8]) {
for i in 0..items.len() {
println!("{}", items[i]);
}
}
fn line_wrapper() {
println!("{}", line!());
}
)
}
#[proc_macro_derive(ExtraLifetimeDerive)]
#[allow(unused)]
pub fn extra_lifetime(_input: TokenStream) -> TokenStream {
quote!(
pub struct ExtraLifetime;
impl<'b> ExtraLifetime {
pub fn something<'c>() -> Self {
Self
}
}
)
}
#[allow(unused)]
#[proc_macro_derive(ArithmeticDerive)]
pub fn arithmetic_derive(_: TokenStream) -> TokenStream {
<TokenStream as FromIterator<TokenTree>>::from_iter([
Ident::new("fn", Span::call_site()).into(),
Ident::new("_foo", Span::call_site()).into(),
Group::new(Delimiter::Parenthesis, TokenStream::new()).into(),
Group::new(
Delimiter::Brace,
<TokenStream as FromIterator<TokenTree>>::from_iter([
Ident::new("let", Span::call_site()).into(),
Ident::new("mut", Span::call_site()).into(),
Ident::new("_n", Span::call_site()).into(),
Punct::new('=', Spacing::Alone).into(),
Literal::i32_unsuffixed(9).into(),
Punct::new(';', Spacing::Alone).into(),
Ident::new("_n", Span::call_site()).into(),
Punct::new('=', Spacing::Alone).into(),
Literal::i32_unsuffixed(9).into(),
Punct::new('/', Spacing::Alone).into(),
Literal::i32_unsuffixed(2).into(),
Punct::new(';', Spacing::Alone).into(),
Ident::new("_n", Span::call_site()).into(),
Punct::new('=', Spacing::Alone).into(),
Punct::new('-', Spacing::Alone).into(),
Ident::new("_n", Span::call_site()).into(),
Punct::new(';', Spacing::Alone).into(),
]),
)
.into(),
])
}
#[allow(unused)]
#[proc_macro_derive(ShadowDerive)]
pub fn shadow_derive(_: TokenStream) -> TokenStream {
<TokenStream as FromIterator<TokenTree>>::from_iter([
Ident::new("fn", Span::call_site()).into(),
Ident::new("_foo", Span::call_site()).into(),
Group::new(Delimiter::Parenthesis, TokenStream::new()).into(),
Group::new(
Delimiter::Brace,
<TokenStream as FromIterator<TokenTree>>::from_iter([
Ident::new("let", Span::call_site()).into(),
Ident::new("_x", Span::call_site()).into(),
Punct::new('=', Spacing::Alone).into(),
Literal::i32_unsuffixed(2).into(),
Punct::new(';', Spacing::Alone).into(),
Ident::new("let", Span::call_site()).into(),
Ident::new("_x", Span::call_site()).into(),
Punct::new('=', Spacing::Alone).into(),
Ident::new("_x", Span::call_site()).into(),
Punct::new(';', Spacing::Alone).into(),
]),
)
.into(),
])
}
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