Binding search in transformer?

[shrinktofit]

I'm new to swc. I'm attempting to implement SystemJS transformer.

How to do binding search in tranformer code like babel's scope? For example search all bindings to an indent to find out it's declaration AST.

I've looked into Scope in ecmascript\transforms\module\src\util.rs', but it seems not what I need.

[kdy1]

Do you want to find all used identifiers? If so, you can use Visit (https://docs.rs/swc_visit/0.2.5/swc_visit/) to collect them. You can store variables from nested scope into a single vector or map, thanks to resolver. See https://docs.rs/swc_ecma_transforms_base/0.26.0/swc_ecma_transforms_base/resolver/fn.resolver_with_mark.html

[kdy1]

Update: theres' https://docs.rs/swc_ecma_utils/0.101.3/swc_ecma_utils/fn.collect_decls.html