pub fn lower(module: &mut TranslationUnit) -> Result<(), Error>Expand description
Performs conversions on the final syntax tree to make it more compatible with WGSL implementations like Naga, catch errors early and perform optimizations.
Currently, lower performs the following transforms:
- remove aliases (inlined)
- remove consts (inlined)
- remove deprecated, non-standard attributes
- remove import declarations
with the eval feature flag enabled, it performs additional transforms:
- evaluate const-expressions (including calls to const functions)
- remove unreachable code paths after const-evaluation
- remove function call statements to const functions (no side-effects)
- make implicit conversions from abstract types explicit (using conversion rank)
Customizing this behavior is not possible currently. The following transforms may be available in the future:
- make variable types explicit
- remove unused variables / code with no side-effects