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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use super::APIConverter;
use crate::{attributes::EnumAttributes, converters::convert_docstring, InterfaceCollector};
use anyhow::{bail, Result};
use uniffi_meta::{EnumMetadata, VariantMetadata};
// Note that we have 2 `APIConverter` impls here - one for the `enum` case
// (including an enum with `[Error]`), and one for the `[Error] interface` cas
// (which is still an enum, but with different "flatness" characteristics.)
impl APIConverter<EnumMetadata> for weedle::EnumDefinition<'_> {
fn convert(&self, ci: &mut InterfaceCollector) -> Result<EnumMetadata> {
let attributes = EnumAttributes::try_from(self.attributes.as_ref())?;
Ok(EnumMetadata {
module_path: ci.module_path(),
name: self.identifier.0.to_string(),
forced_flatness: None,
discr_type: None,
variants: self
.values
.body
.list
.iter()
.map::<Result<_>, _>(|v| {
Ok(VariantMetadata {
name: v.value.0.to_string(),
discr: None,
fields: vec![],
docstring: v.docstring.as_ref().map(|v| convert_docstring(&v.0)),
})
})
.collect::<Result<Vec<_>>>()?,
non_exhaustive: attributes.contains_non_exhaustive_attr(),
docstring: self.docstring.as_ref().map(|v| convert_docstring(&v.0)),
})
}
}
impl APIConverter<EnumMetadata> for weedle::InterfaceDefinition<'_> {
fn convert(&self, ci: &mut InterfaceCollector) -> Result<EnumMetadata> {
if self.inheritance.is_some() {
bail!("interface inheritance is not supported for enum interfaces");
}
let attributes = EnumAttributes::try_from(self.attributes.as_ref())?;
Ok(EnumMetadata {
module_path: ci.module_path(),
name: self.identifier.0.to_string(),
forced_flatness: Some(false),
variants: self
.members
.body
.iter()
.map::<Result<VariantMetadata>, _>(|member| match member {
weedle::interface::InterfaceMember::Operation(t) => Ok(t.convert(ci)?),
_ => bail!(
"interface member type {:?} not supported in enum interface",
member
),
})
.collect::<Result<Vec<_>>>()?,
discr_type: None,
non_exhaustive: attributes.contains_non_exhaustive_attr(),
docstring: self.docstring.as_ref().map(|v| convert_docstring(&v.0)),
// Enums declared using the `[Enum] interface` syntax might have variants with fields.
//flat: false,
})
}
}
#[cfg(test)]
mod test {
use super::*;
use uniffi_meta::Metadata;
#[test]
fn test_duplicate_variants() {
const UDL: &str = r#"
namespace test{};
// Weird, but currently allowed!
// We should probably disallow this...
enum Testing { "one", "two", "one" };
"#;
let mut ci = InterfaceCollector::from_webidl(UDL, "crate_name").unwrap();
assert_eq!(ci.types.namespace, "test");
assert_eq!(ci.types.module_path(), "crate_name");
assert_eq!(ci.items.len(), 1);
let e = &ci.items.pop_first().unwrap();
match e {
Metadata::Enum(e) => assert_eq!(e.variants.len(), 3),
_ => unreachable!(),
}
}
}
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