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reduce the amount of traversal/projection code that the visitor has to implement itself

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This commit is contained in:
Ralf Jung 2018-10-31 18:44:00 +01:00
parent 5b5e076b47
commit 7d7bd9b6c2
4 changed files with 237 additions and 160 deletions
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2
src/test/ui/consts/const-eval/ub-upvars.stderr
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@ -6,7 +6,7 @@ LL | | let bad_ref: &'static u16 = unsafe { mem::transmute(0usize) };
LL | | let another_var = 13;
LL | | move || { let _ = bad_ref; let _ = another_var; }
LL | | };
| |__^ type validation failed: encountered 0 at .<deref>.<closure-var(bad_ref)>, but expected something greater or equal to 1
| |__^ type validation failed: encountered 0 at .<deref>.<dyn-downcast>.<closure-var(bad_ref)>, but expected something greater or equal to 1
|
= note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rust compiler repository if you believe it should not be considered undefined behavior

2
src/test/ui/consts/const-eval/union-ub-fat-ptr.stderr
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@ -66,7 +66,7 @@ error[E0080]: it is undefined behavior to use this value
--> $DIR/union-ub-fat-ptr.rs:116:1
|
LL | const G: &Trait = &unsafe { BoolTransmute { val: 3 }.bl };
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered 3 at .<deref>, but expected something in the range 0..=1
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type validation failed: encountered 3 at .<deref>.<dyn-downcast>, but expected something in the range 0..=1
|
= note: The rules on what exactly is undefined behavior aren't clear, so this check might be overzealous. Please open an issue on the rust compiler repository if you believe it should not be considered undefined behavior