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Type inference: Disable universal conditions by default #21151

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View file Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -117,8 +117,6 @@ module SatisfiesBlanketConstraint<
predicate relevantConstraint(ArgumentTypeAndBlanketOffset ato, Type constraint) {
relevantConstraint(ato, _, constraint.(TraitType).getTrait())
}

predicate useUniversalConditions() { none() }
}

private module SatisfiesBlanketConstraint =
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Original file line number Diff line number Diff line change
Expand Up @@ -2193,8 +2193,6 @@ private module MethodResolution {
exists(mc) and
constraint.(TraitType).getTrait() instanceof DerefTrait
}

predicate useUniversalConditions() { none() }
}

private module MethodCallSatisfiesDerefConstraint =
Expand Down Expand Up @@ -3566,8 +3564,6 @@ private module AwaitSatisfiesConstraintInput implements SatisfiesConstraintInput
exists(term) and
constraint.(TraitType).getTrait() instanceof FutureTrait
}

predicate useUniversalConditions() { none() }
}

pragma[nomagic]
Expand Down Expand Up @@ -3764,8 +3760,6 @@ private module ForIterableSatisfiesConstraintInput implements
t instanceof IntoIteratorTrait
)
}

predicate useUniversalConditions() { none() }
}

pragma[nomagic]
Expand Down Expand Up @@ -3817,8 +3811,6 @@ private module InvokedClosureSatisfiesConstraintInput implements
exists(term) and
constraint.(TraitType).getTrait() instanceof FnOnceTrait
}

predicate useUniversalConditions() { none() }
}

/** Gets the type of `ce` when viewed as an implementation of `FnOnce`. */
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2 changes: 1 addition & 1 deletion rust/ql/test/library-tests/type-inference/main.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -438,7 +438,7 @@ mod method_non_parametric_trait_impl {

let thing = MyThing { a: S1 };
let i = thing.convert_to(); // $ type=i:S1 target=T::convert_to
let j = convert_to(thing); // $ type=j:S1 target=convert_to
let j = convert_to(thing); // $ target=convert_to $ MISSING: type=j:S1 -- the blanket implementation `impl<T: MyTrait<S1>> ConvertTo<S1> for T` is currently not included in the constraint analysis
}
}

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Original file line number Diff line number Diff line change
Expand Up @@ -7151,8 +7151,6 @@ inferType
| main.rs:440:17:440:21 | thing | | main.rs:224:5:227:5 | MyThing |
| main.rs:440:17:440:21 | thing | A | main.rs:235:5:236:14 | S1 |
| main.rs:440:17:440:34 | thing.convert_to() | | main.rs:235:5:236:14 | S1 |
| main.rs:441:13:441:13 | j | | main.rs:235:5:236:14 | S1 |
| main.rs:441:17:441:33 | convert_to(...) | | main.rs:235:5:236:14 | S1 |
| main.rs:441:28:441:32 | thing | | main.rs:224:5:227:5 | MyThing |
| main.rs:441:28:441:32 | thing | A | main.rs:235:5:236:14 | S1 |
| main.rs:450:26:450:29 | SelfParam | | main.rs:449:5:453:5 | Self [trait OverlappingTrait] |
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Original file line number Diff line number Diff line change
Expand Up @@ -849,7 +849,7 @@ module Make1<LocationSig Location, InputSig1<Location> Input1> {
* checked. Hence using these represent a trade-off between too many
* constraints and too few constraints being satisfied.
*/
default predicate useUniversalConditions() { any() }
default predicate useUniversalConditions() { none() }
}

module SatisfiesConstraint<
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