101 lines
2.5 KiB
Rust
101 lines
2.5 KiB
Rust
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#![feature(decl_macro, rustc_attrs)]
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#![deny(single_use_lifetimes)]
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mod type_params {
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macro m($T:ident) {
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fn f<$T: Clone, T: PartialEq>(t1: $T, t2: T) -> ($T, bool) {
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(t1.clone(), t2 == t2)
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}
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}
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#[rustc_macro_transparency = "semitransparent"]
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macro n($T:ident) {
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fn g<$T: Clone>(t1: $T, t2: T) -> (T, $T) {
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(t1.clone(), t2.clone())
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}
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fn h<T: Clone>(t1: $T, t2: T) -> (T, $T) {
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(t1.clone(), t2.clone())
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}
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}
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#[rustc_macro_transparency = "transparent"]
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macro p($T:ident) {
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fn j<$T: Clone>(t1: $T, t2: T) -> (T, $T) {
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(t1.clone(), t2.clone())
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}
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fn k<T: Clone>(t1: $T, t2: T) -> (T, $T) {
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(t1.clone(), t2.clone())
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}
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}
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m!(T);
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n!(T);
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p!(T);
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}
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mod lifetime_params {
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macro m($a:lifetime) {
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fn f<'b, 'c, $a: 'b, 'a: 'c>(t1: &$a(), t2: &'a ()) -> (&'b (), &'c ()) { //~ ERROR lifetime parameter `'a` only used once
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(t1, t2)
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}
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}
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#[rustc_macro_transparency = "semitransparent"]
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macro n($a:lifetime) {
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fn g<$a>(t1: &$a(), t2: &'a ()) -> (&'a (), &$a ()) {
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(t1, t2)
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}
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fn h<'a>(t1: &$a(), t2: &'a ()) -> (&'a (), &$a ()) {
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(t1, t2)
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}
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}
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#[rustc_macro_transparency = "transparent"]
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macro p($a:lifetime) {
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fn j<$a>(t1: &$a(), t2: &'a ()) -> (&'a (), &$a ()) {
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(t1, t2)
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}
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fn k<'a>(t1: &$a(), t2: &'a ()) -> (&'a (), &$a ()) {
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(t1, t2)
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}
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}
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m!('a); //~ ERROR lifetime parameter `'a` only used once
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n!('a);
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p!('a);
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}
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mod const_params {
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macro m($C:ident) {
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fn f<const $C: usize, const C: usize>(t1: [(); $C], t2: [(); C]) -> ([(); $C], [(); C]) {
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(t1, t2)
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}
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}
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#[rustc_macro_transparency = "semitransparent"]
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macro n($C:ident) {
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fn g<const $C: usize>(t1: [(); $C], t2: [(); C]) -> ([(); C], [(); $C]) {
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(t1, t2)
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}
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fn h<const C: usize>(t1: [(); $C], t2: [(); C]) -> ([(); C], [(); $C]) {
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(t1, t2)
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}
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}
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#[rustc_macro_transparency = "transparent"]
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macro p($C:ident) {
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fn j<const $C: usize>(t1: [(); $C], t2: [(); C]) -> ([(); C], [(); $C]) {
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(t1, t2)
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}
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fn k<const C: usize>(t1: [(); $C], t2: [(); C]) -> ([(); C], [(); $C]) {
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(t1, t2)
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}
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}
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m!(C);
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n!(C);
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p!(C);
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}
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fn main() {}
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