|0.2.2||Nov 11, 2021|
|0.2.1||Oct 28, 2019|
#1061 in Rust patterns
Keep your compile time during MOnoMOrphization
This is a
proc_macro crate to help keeping the code footprint of
generic methods in check. Often, generics are used in libraries to
improve ergonomics. However, this has a cost in compile time and
binary size. Optimally, one creates a small shell function that
does the generic conversions and then calls an inner function, but
that makes the code less readable.
#[momo] annotation from this crate to split your function
into an outer conversion and a private inner function. In return,
you get some compile time for a tiny bit of runtime (if at all) –
without impairing readability.
Conversions currently supported are
Notes on watt
This new updated version uses D. Tolnay's watt runtime to speed up the compile time, which was negatively affected with proc macro baggage.
The main crate uses a pre-built wasm containing the tagged version. Rebuilding the wasm can be done with the commands:
cd wasm cargo build --release --target wasm32-unknown-unknown # If wasm-opt is unavailable, copying the file is fine. wasm-opt target/wasm32-unknown-unknown/release/momo_watt.wasm -Oz \ --strip-debug --simplify-globals --vacuum -o ../src/momo.wasm
You might need to add the
wasm32-unknown-unknown target to your
(If you are tagging a new version, remember to commit the new
Also change the versions in both
Debugging the macro
The cargo-expand tool may be used to expand the output of macro expansion,
including from this proc-macro. To examine the results of the example file,
cargo expand --example check.