70 lines
2.1 KiB
Rust
70 lines
2.1 KiB
Rust
#![allow(dead_code, non_camel_case_types)]
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// Test that bounds on higher-kinded lifetime binders are rejected.
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fn bar1<'a, 'b>(
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x: &'a i32,
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y: &'b i32,
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f: for<'xa, 'xb: 'xa+'xa> fn(&'xa i32, &'xb i32) -> &'xa i32)
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//~^ ERROR bounds cannot be used in this context
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{
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// If the bound in f's type would matter, the call below would (have to)
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// be rejected.
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f(x, y);
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}
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fn bar2<'a, 'b, F: for<'xa, 'xb: 'xa> Fn(&'xa i32, &'xb i32) -> &'xa i32>(
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//~^ ERROR bounds cannot be used in this context
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x: &'a i32,
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y: &'b i32,
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f: F)
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{
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// If the bound in f's type would matter, the call below would (have to)
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// be rejected.
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f(x, y);
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}
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fn bar3<'a, 'b, F>(
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x: &'a i32,
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y: &'b i32,
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f: F)
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where F: for<'xa, 'xb: 'xa> Fn(&'xa i32, &'xb i32) -> &'xa i32
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//~^ ERROR bounds cannot be used in this context
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{
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// If the bound in f's type would matter, the call below would (have to)
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// be rejected.
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f(x, y);
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}
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fn bar4<'a, 'b, F>(
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x: &'a i32,
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y: &'b i32,
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f: F)
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where for<'xa, 'xb: 'xa> F: Fn(&'xa i32, &'xb i32) -> &'xa i32
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//~^ ERROR bounds cannot be used in this context
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{
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// If the bound in f's type would matter, the call below would (have to)
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// be rejected.
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f(x, y);
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}
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struct S1<F: for<'xa, 'xb: 'xa> Fn(&'xa i32, &'xb i32) -> &'xa i32>(F);
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//~^ ERROR bounds cannot be used in this context
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struct S2<F>(F) where F: for<'xa, 'xb: 'xa> Fn(&'xa i32, &'xb i32) -> &'xa i32;
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//~^ ERROR bounds cannot be used in this context
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struct S3<F>(F) where for<'xa, 'xb: 'xa> F: Fn(&'xa i32, &'xb i32) -> &'xa i32;
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//~^ ERROR bounds cannot be used in this context
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struct S_fnty(for<'xa, 'xb: 'xa> fn(&'xa i32, &'xb i32) -> &'xa i32);
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//~^ ERROR bounds cannot be used in this context
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type T1 = Box<dyn for<'xa, 'xb: 'xa> Fn(&'xa i32, &'xb i32) -> &'xa i32>;
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//~^ ERROR bounds cannot be used in this context
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fn main() {
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let _ : Option<for<'xa, 'xb: 'xa> fn(&'xa i32, &'xb i32) -> &'xa i32> = None;
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//~^ ERROR bounds cannot be used in this context
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let _ : Option<Box<dyn for<'xa, 'xb: 'xa> Fn(&'xa i32, &'xb i32) -> &'xa i32>> = None;
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//~^ ERROR bounds cannot be used in this context
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}
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