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