Rust: Type inference for operator overloading #19593
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aibaars
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May 27, 2025
hvitved
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May 28, 2025
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Very nice! A couple of trivial remarks.
| * This is either 1 for prefix operations, or 2 for binary operations. | ||
| */ | ||
| abstract string getOperatorName(); | ||
| final int getNumberOfOperands() { result = count(this.getAnOperand()) } |
| */ | ||
| abstract Expr getAnOperand(); | ||
| predicate isOverloaded(Trait trait, string methodName) { | ||
| isOverloaded(this.getOperatorName(), trait.getCanonicalPath(), methodName) |
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Great to see that the QL computed canonical paths work here.
| } | ||
| } | ||
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| private class OperationAccess extends Access instanceof Operation { |
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Add charpred with super.isOverloaded(_, _)?
| override Trait getTrait() { result = trait } | ||
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| pragma[nomagic] | ||
| override Type getTypeAt(TypePath path) { |
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I know it was already so before this PR, but perhaps call this predicate getReceiverTypeAt instead? I have mistakenly thought it meant the type of the method call itself a couple of times...
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I definitely get that, but I can't just change it as we need it to match the signature when it is given to IsInstantiationOf (which is generic and isn't just used for receivers).
hvitved
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Implements type inference for overloaded operators in Rust.
Note, that this does not implement the data flow side of things.
Shoutout to Copilot
for helping out with generating the tests 💪