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