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Source-matched native proc macros
This package depends on the enclosing Makepad checkout's expansion libraries by path.
The relax-tokens feature of makepad-micro-proc-macro selects the Relax Rust token model
for these normal dependencies. Cargo's resolver 2 keeps rustc's host proc-macro builds
on the standard proc_macro API.
build.rs embeds the actual packages' manifests and source files for runtime identity
checks and generates bindings from those same wrapper sources. It removes only
proc-macro entry annotations and redirects their token imports. There is no snapshot
or manual sync step; changing the checkout's sources rebuilds the identity and bindings.
The compiler validates every source and manifest in a macro's dependency closure, its edition, feature policy, and dependency aliases before dispatching to this library. Changing a wrapper, helper, implementation, or dependency makes that unit use the JIT. New or unsupported proc macros also use the JIT. No disk cache or runtime build is added.
Review feature policy in compiler/src/native_macros.rs when updating: only the current
wrapper's unused default/nightly markers and live-id's empty default are accepted.
Expansion implementations have no features; the program's proc-macro helper must have
relax-tokens disabled. The live-id library is an unused dependency
of the widget wrapper, retained for complete graph validation; it is not linked here.
MAKEPAD_RUN_NATIVE_MACROS=0 selects the hosted path for comparisons.
MAKEPAD_RUN_NATIVE_VERIFY=1 runs both paths and compares the entire encoded token stream,
including every source span. MAKEPAD_RUN_PARSE_VERIFY=1 compares worker results with fresh
collection-scope parses, including AST arrays, tokens, source/hygiene maps, macro
publications, and file preparation. Use those flags for verification, not timing.
Derives execute concurrently on the existing parse workers, for Rust files. The serial-loader fallback retains the front end's derive pre-expansion pool for Rust source. Extra nested derive pools are unnecessary for the normal worker path.