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fix internally tagged enums

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This commit is contained in:
Aiden McClelland
2023-09-20 14:52:28 -06:00
parent b589a40a8b
commit b553ff7b53
1 changed files with 9 additions and 17 deletions
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26
patch-db-macro-internals/src/lib.rs
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@@ -462,14 +462,14 @@ fn build_model_enum(base: &DeriveInput, ast: &DataEnum) -> TokenStream {
.attrs
.iter()
.filter(|attr| attr.path.is_ident("serde"))
.filter_map(|attr| {
.filter_map(|attr| -> Option<Punctuated<MetaNameValue, Comma>> {
attr.parse_args_with(|s: ParseStream| {
Punctuated::<MetaNameValue, Comma>::parse_terminated(s)
})
.ok()
})
.flatten()
.filter_map(|nv| {
.filter_map(|nv: MetaNameValue| {
if nv.path.is_ident("tag") {
Some(("tag", nv.lit))
} else if nv.path.is_ident("content") {
@@ -479,6 +479,7 @@ fn build_model_enum(base: &DeriveInput, ast: &DataEnum) -> TokenStream {
}
})
.collect();
let mut model_variants = TokenStream::new();
let mut ref_model_variants = TokenStream::new();
let mut mut_model_variants = TokenStream::new();
@@ -563,11 +564,7 @@ fn build_model_enum(base: &DeriveInput, ast: &DataEnum) -> TokenStream {
let variant_accessor =
get_accessor(&serde_rename_all, &variant.attrs, variant_name);
tag_variants.extend(quote_spanned! { variant_name.span() =>
Some(#variant_accessor) => #match_name::#variant_name(self.transmute(|v| {
#[allow(unused_imports)]
use patch_db::value::index::Index;
#variant_accessor.index_into_owned(v).unwrap_or_default()
})),
Some(#variant_accessor) => #match_name::#variant_name(self.transmute(|v| v)),
});
tag_variants_unmatch.extend(quote_spanned! { variant_name.span() =>
#match_name::#variant_name(v) => Self::from_value({
@@ -577,18 +574,10 @@ fn build_model_enum(base: &DeriveInput, ast: &DataEnum) -> TokenStream {
}),
});
tag_variants_ref.extend(quote_spanned! { variant_name.span() =>
Some(#variant_accessor) => #match_name_ref::#variant_name(self.transmute_ref(|v| {
#[allow(unused_imports)]
use patch_db::value::index::Index;
#variant_accessor.index_into(v).unwrap_or(&patch_db::value::NULL)
})),
Some(#variant_accessor) => #match_name_ref::#variant_name(self.transmute_ref(|v| v)),
});
tag_variants_mut.extend(quote_spanned! { variant_name.span() =>
Some(#variant_accessor) => #match_name_mut::#variant_name(self.transmute_mut(|v| {
#[allow(unused_imports)]
use patch_db::value::index::Index;
#variant_accessor.index_or_insert(v)
})),
Some(#variant_accessor) => #match_name_mut::#variant_name(self.transmute_mut(|v| v)),
});
}
(
@@ -732,6 +721,7 @@ fn build_model_enum(base: &DeriveInput, ast: &DataEnum) -> TokenStream {
}
}
#[derive(Debug)]
#vis enum #match_name {
#model_variants
Error(patch_db::Value),
@@ -743,6 +733,7 @@ fn build_model_enum(base: &DeriveInput, ast: &DataEnum) -> TokenStream {
}
}
#[derive(Debug)]
#vis enum #match_name_ref<'a> {
#ref_model_variants
Error(&'a patch_db::Value),
@@ -754,6 +745,7 @@ fn build_model_enum(base: &DeriveInput, ast: &DataEnum) -> TokenStream {
}
}
#[derive(Debug)]
#vis enum #match_name_mut<'a> {
#mut_model_variants
Error(&'a mut patch_db::Value),