refactor(binder): prepare for implicit cast support #3381
Merged
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What's changed and what's your intention?
This PR contains 4 refactors that prepares for implicit cast (preview in #3296).
FuncSigMap
hides the implementation ofHashMap<FuncSign, DataTypeName>
. It will be updated to another lookup structure. With this refactoring, thebuild_type_derive_map
withinsert
calls can be reused.infer_type
interface takes input exprs and potentially returns them casted to the matching function's parameters.DataTypeName
toDataType
mapping extractedcast_ok_base
works onDataTypeName
rather thanDataType
.Checklist
./risedev check
(or alias,./risedev c
)Refer to a related PR or issue link (optional)