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Nathan Rajlich
ae5ee5ba2e
* fix(swc-plugin): register class expressions via an IIFE and reject unnameable classes Class expressions with "use step" methods or custom serialization were registered by module-level statements referencing the class by name. When no module-scope binding could be resolved the plugin fell back to a placeholder `AnonymousClass` identifier, which is a guaranteed ReferenceError at module evaluation (vercel/workflow#3929). Other shapes were silently wrong as well: `var A = class {}, B = class {}` registered A's steps under B, `X = class {}` assignments and classes nested inside functions emitted unresolvable references. Class expressions are now wrapped in a single IIFE that receives the class, performs every registration recorded for it, and returns it, so the registration no longer depends on a name being in scope. The class name is still needed for step/class IDs and is derived from the assigned variable, the class's own identifier, or the property key it is assigned to (`exports.Foo = class {}`, `{ Foo: class {} }`). When none is available, or the class is declared inside a function, the plugin emits a compile error instead of broken code. Class declarations keep their existing module-level output; the emitters were factored so both paths share the same statement builders. * fix(swc-plugin): generate names for anonymous class expressions instead of erroring With registration happening inside the IIFE, an anonymous class expression in a position that provides no name (`foo(class { ... })`, an array element, a conditional branch) only needs a name for its step/class IDs. Generate a deterministic `AnonymousClass<N>`, counting only anonymous classes that have something to register, instead of rejecting them. Classes declared inside a function remain an error. Dead-code elimination now keeps module-level declarations whose initializer contains a wrapped class expression: evaluating the initializer is what registers the class, and the binding may be otherwise unreferenced.
@workflow/swc-plugin
SWC transform plugin to transform the directives for Workflow SDK.
Development
Add build target using rustup
rustup target add wasm32-unknown-unknown
Ensure you can test/build
cargo test
cargo check
cargo build