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Overhaul const-checking diagnostics #77354

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Merged
merged 23 commits into from
Oct 1, 2020
Merged

Overhaul const-checking diagnostics #77354

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4d343a5
Useful derives on `mir::LocalKind`
ecstatic-morse Sep 30, 2020
325b7d4
Continue const-checking after errors when easy
ecstatic-morse Sep 29, 2020
25c7753
Continue after `impl Trait` in `const fn`
ecstatic-morse Sep 30, 2020
c38aca0
`delay_span_bug` if const-checking an `async` function
ecstatic-morse Sep 30, 2020
20e07e7
Forbid generator-specific MIR in all const-contexts
ecstatic-morse Sep 30, 2020
782a595
Return a `DiagnosticBuilder` from structured errors
ecstatic-morse Sep 29, 2020
ce50939
Fix "unstable in stable" error
ecstatic-morse Sep 29, 2020
de35c42
Remove `ops::non_const`
ecstatic-morse Sep 29, 2020
b518ccb
Give `MutDeref` a real error message
ecstatic-morse Sep 29, 2020
a23297f
Bless mut tests
ecstatic-morse Sep 29, 2020
5b31455
Priority levels
ecstatic-morse Sep 30, 2020
b400871
Don't emit duplicate errors for the return place
ecstatic-morse Sep 30, 2020
51fbd55
Bless tests
ecstatic-morse Sep 30, 2020
37f37dc
Emit multiple function pointer errors from const-checker
ecstatic-morse Sep 30, 2020
879d379
Bless output
ecstatic-morse Sep 30, 2020
e02ea83
Don't stop const-checking after erroneous trait bound
ecstatic-morse Sep 30, 2020
4bbc79c
Bless tests
ecstatic-morse Sep 30, 2020
287993c
Remove machinery for halting error output
ecstatic-morse Sep 30, 2020
bed7b29
Update `compile-fail` test
ecstatic-morse Sep 30, 2020
1513904
Remove default `build_error` impl
ecstatic-morse Sep 30, 2020
7c6d685
Rewrite E0019 example
ecstatic-morse Sep 30, 2020
0c26144
Better span for attribute suggestions
ecstatic-morse Sep 30, 2020
1301f43
Remove E0019, use E0015 for inline assembly in a const
ecstatic-morse Sep 30, 2020
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10 changes: 6 additions & 4 deletions compiler/rustc_error_codes/src/error_codes/E0019.md
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Original file line number Diff line number Diff line change
Expand Up @@ -4,12 +4,14 @@ because the expression's value must be known at compile-time.
Erroneous code example:

```compile_fail,E0019
#![feature(box_syntax)]
#![feature(asm)]

fn main() {
struct MyOwned;

static STATIC11: Box<MyOwned> = box MyOwned; // error!
static STATIC11: i32 = {
let x: i32;
unsafe { asm!("mov rax, 2", out("rax") x) }; // error!
x
};
}
```

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