[E0063] constructor is missing fields

[MahadMuhammad]

Constructor is missing fields - E0063

Added error code for Missing Field in
struct or struct-like enum variant.

---

Tested Code From E0063

// https://doc.rust-lang.org/error_codes/E0063.html
struct Foo {
    x: i32,
    y: i32,
    z: i32,
}

fn main() {
    let x = Foo { x: 0 , y:1 }; // { dg-error "constructor is missing fields" }
}

---

Output:

➜  gccrs-build gcc/crab1 /home/mahad/Desktop/mahad/gccrs/gcc/testsuite/rust/compile/missing_constructor_fields.rs
/home/mahad/Desktop/mahad/gccrs/gcc/testsuite/rust/compile/missing_constructor_fields.rs:9:13: error: constructor is missing fields [E0063]
    9 |     let x = Foo { x: 0 , y:1 }; // { dg-error "constructor is missing fields" }
      |             ^~~

Analyzing compilation unit

Time variable                                   usr           sys          wall           GGC
 TOTAL                              :   0.00          0.00          0.00          146k
Extra diagnostic checks enabled; compiler may run slowly.
Configure with --enable-checking=release to disable checks.

gcc/rust/ChangeLog:

* typecheck/rust-hir-type-check-struct.cc (TypeCheckStructExpr::resolve): called error function.

gcc/testsuite/ChangeLog:

* rust/compile/missing_constructor_fields.rs: New test.

[MahadMuhammad]

• We can further improve location info by emitting initializer & field information by initializer & field location info missing in Error message #2388

[philberty]

LGTM