docs for safeCasting and uncheckedOverflow builtin rules#447
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yoav-rodeh merged 6 commits intomasterfrom Feb 5, 2026
Merged
docs for safeCasting and uncheckedOverflow builtin rules#447yoav-rodeh merged 6 commits intomasterfrom
yoav-rodeh merged 6 commits intomasterfrom
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yoav-rodeh
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jar-ben
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Feb 4, 2026
docs/cvl/builtin.md
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| The `safeCasting` built-in rule is there to catch cases where an explicit cast in solidity is actually out of bounds. | ||
| For example, if an `uint` is cast to a `uint64`, the rule will fail if there is some external function in the contract, that can be called | ||
| in such a way, that the value being cast is larger than `2^64 - 1`. Casting between signed and unsigned values are also checked. So if an `uint` is cast to an `int`, and the cast value is larger than `2^255 - 1`. the rule will fail. |
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. the rule will fail. has . at the beginning - should be ,.
docs/cvl/builtin.md
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| ```cvl | ||
| use builtin rule safeCasting; | ||
| ``` | ||
| in a spec file. In addition, the line `safe_casting_builtin : true` must be added to the conf file. |
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Does safe_casting_builtin : true work? I thought it has to be "safe_casting_builtin" : true
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both work, but I think they somehow prefer the brackets, i'll add it.
| ``` | ||
| This will fail the builtin rule, because the multiplication is a `uint128` multiplication (even if it's later considered as a `uint`). | ||
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| This rule can be enabled by including |
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I suppose you also have to set unchecked_overflow_builtin in the .conf file?
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oh yah, i forgot. Added.
jar-ben
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Feb 5, 2026
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as the title says