feature: Add type_name override to Describe proc macro#1671
Merged
talekhinezh merged 2 commits intodevelopfrom Jan 8, 2024
Merged
feature: Add type_name override to Describe proc macro#1671talekhinezh merged 2 commits intodevelopfrom
talekhinezh merged 2 commits intodevelopfrom
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talekhinezh
approved these changes
Jan 8, 2024
dhedey
commented
Jan 15, 2024
| get_sbor_attribute_string_value(&attrs, "type_name")?.unwrap_or(ident.to_string()); | ||
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| let type_id = quote! { | ||
| ::sbor::RustTypeId::novel_with_code( |
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Note for the future - we can consider just using core::any::TypeId::of::<Self> here, if we add where Self: 'static to the Describe trait (which should be fine) rust-lang/rust#72488
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Although this is scary!
Type ids have some edges that this stabilization exposes to more contexts. It's possible for type ids to collide (but this is a bug). Since they can change between compiler versions, it's never valid to cast a type id to its underlying value.
And looks like it was actually un-stabilized as const - so perhaps we're good to wait for it to be improved... see discussion on rust-lang/rust#75923
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Summary
Adds functionality for type name override via
#[sbor(type_name = "NewTypeName")].This is an addition, not a breaking change.
This would allow e.g. us to rename types without affecting their scrypto schema. For example, we could create e.g.
TimePrecisionV2and renameTimePrecisiontoTimePrecisionV1, whilst allowing them both to have an SBOR type name ofTimePrecision. The latter is required for backwards compatibility.Testing
Tests are in
sbor-tests.