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When a struct definition has default field values, and the use struct ctor has missing field, if all those missing fields have defaults suggest `..`:
```
error[E0063]: missing fields `field1` and `field2` in initializer of `S`
--> $DIR/non-exhaustive-ctor.rs:16:13
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LL | let _ = S { field: () };
| ^ missing `field1` and `field2`
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help: all remaining fields have defaults, use `..`
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LL | let _ = S { field: (), .. };
| ++++
```
29 lines
886 B
Rust
29 lines
886 B
Rust
//@ revisions: enabled disabled
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//@[enabled] run-rustfix
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#![allow(private_interfaces, dead_code)]
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#![cfg_attr(enabled, feature(default_field_values))]
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use m::S;
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mod m {
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pub struct S {
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pub field: () = (),
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//[disabled]~^ ERROR default values on fields are experimental
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pub field1: Priv = Priv,
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//[disabled]~^ ERROR default values on fields are experimental
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pub field2: Priv = Priv,
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//[disabled]~^ ERROR default values on fields are experimental
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}
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struct Priv;
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}
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fn main() {
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let _ = S { .. }; // ok
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//[disabled]~^ ERROR base expression required after `..`
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let _ = S { field: (), .. }; // ok
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//[disabled]~^ ERROR base expression required after `..`
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let _ = S { };
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//~^ ERROR missing fields `field`, `field1` and `field2`
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let _ = S { field: () };
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//~^ ERROR missing fields `field1` and `field2`
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}
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