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Java: Improve unification check for bounded types.

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This commit is contained in:
Anders Schack-Mulligen
2022-08-18 10:49:39 +02:00
parent 6b01f02df6
commit f248c6a11e
1 changed files with 18 additions and 0 deletions
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18
java/ql/lib/semmle/code/java/dispatch/Unification.qll
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@@ -66,6 +66,24 @@ module MkUnification<unificationTarget/1 targetLeft, unificationTarget/1 targetR
or
failsUnification(t1.(Array).getComponentType(), t2.(Array).getComponentType())
or
exists(RefType upperbound, RefType other |
t1.(BoundedType).getAnUltimateUpperBoundType().getSourceDeclaration() = upperbound and
t2.(RefType).getSourceDeclaration() = other and
not t2 instanceof BoundedType
or
t2.(BoundedType).getAnUltimateUpperBoundType().getSourceDeclaration() = upperbound and
t1.(RefType).getSourceDeclaration() = other and
not t1 instanceof BoundedType
|
not other.getASourceSupertype*() = upperbound
)
or
exists(RefType upperbound1, RefType upperbound2 |
t1.(BoundedType).getAnUltimateUpperBoundType() = upperbound1 and
t2.(BoundedType).getAnUltimateUpperBoundType() = upperbound2 and
notHaveIntersection(upperbound1, upperbound2)
)
or
not (
t1 instanceof Array and t2 instanceof Array
or