mirror of https://github.com/rust-lang/rust
26 lines
647 B
Rust
26 lines
647 B
Rust
//@ build-fail
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//@ compile-flags:-Zpolymorphize=on
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#![feature(rustc_attrs)]
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// This test checks that the polymorphization analysis doesn't break when the
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// function/closure doesn't just have generic parameters.
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// Function has an unused generic parameter.
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#[rustc_polymorphize_error]
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pub fn unused<'a, T>(_: &'a u32) {
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//~^ ERROR item has unused generic parameters
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}
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#[rustc_polymorphize_error]
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pub fn used<'a, T: Default>(_: &'a u32) -> u32 {
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let _: T = Default::default();
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let add_one = |x: u32| x + 1;
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//~^ ERROR item has unused generic parameters
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add_one(3)
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}
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fn main() {
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unused::<u32>(&3);
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used::<u32>(&3);
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}
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