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lofty_attr: Make it possible to prevent auto impl of Into<TaggedFile>

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Serial 2023-01-08 21:12:40 -05:00 committed by Alex
parent 53050039a5
commit fee737fd4e
1 changed files with 25 additions and 8 deletions
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33
lofty_attr/src/lofty_file.rs
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@ -12,6 +12,7 @@ pub(crate) fn parse(
errors: &mut Vec<syn::Error>,
) -> proc_macro2::TokenStream {
let impl_audiofile = should_impl_audiofile(&input.attrs);
let impl_into_taggedfile = should_impl_into_taggedfile(&input.attrs);
let struct_name = input.ident.clone();
let read_fn = match util::get_attr("read_fn", &input.attrs) {
@ -86,26 +87,32 @@ pub(crate) fn parse(
}
});
let audiofile_impl = if impl_audiofile {
let mut audiofile_impl = proc_macro2::TokenStream::new();
if impl_audiofile {
let properties_field = if let Some(field) = properties_field {
field
} else {
bail!(errors, input.ident.span(), "Struct has no properties field");
};
generate_audiofile_impl(
audiofile_impl = generate_audiofile_impl(
&struct_name,
&tag_fields,
properties_field,
read_fn,
write_fn,
)
} else {
proc_macro2::TokenStream::new()
};
);
}
let from_taggedfile_impl =
generate_from_taggedfile_impl(&struct_name, &tag_fields, file_type, has_internal_file_type);
let mut from_taggedfile_impl = proc_macro2::TokenStream::new();
if impl_into_taggedfile {
from_taggedfile_impl = generate_from_taggedfile_impl(
&struct_name,
&tag_fields,
file_type,
has_internal_file_type,
);
}
let getters = get_getters(&tag_fields, &struct_name);
@ -204,6 +211,16 @@ fn should_impl_audiofile(attrs: &[Attribute]) -> bool {
true
}
fn should_impl_into_taggedfile(attrs: &[Attribute]) -> bool {
for attr in attrs {
if util::has_path_attr(attr, "no_into_taggedfile_impl") {
return false;
}
}
true
}
fn get_getters<'a>(
tag_fields: &'a [FieldContents],
struct_name: &'a Ident,