48 lines
759 B
Rust
48 lines
759 B
Rust
#![feature(try_trait)]
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// edition:2018
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fn main() {}
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fn a_function() -> u32 {
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let x: Option<u32> = None;
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x?; //~ ERROR the `?` operator
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22
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}
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fn a_closure() -> u32 {
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let a_closure = || {
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let x: Option<u32> = None;
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x?; //~ ERROR the `?` operator
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22
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};
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a_closure()
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}
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fn a_method() -> u32 {
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struct S;
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impl S {
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fn a_method() {
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let x: Option<u32> = None;
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x?; //~ ERROR the `?` operator
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}
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}
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S::a_method();
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22
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}
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fn a_trait_method() -> u32 {
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struct S;
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trait T {
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fn a_trait_method() {
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let x: Option<u32> = None;
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x?; //~ ERROR the `?` operator
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}
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}
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impl T for S { }
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S::a_trait_method();
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22
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}
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