mirror of
https://github.com/servo/servo
synced 2026-05-10 17:12:23 +02:00
ad198993b1
DOM structs embed their parent type as their first field. This
introduces a `.parent()` method to the DOM struct that returns its first
field, and codegens a type assert that ensures that `.parent()` returns
the parent struct.
This generates:
On `#[dom_struct]`:
```rust
impl HasParent for Type {
type Parent = ParentType;
fn as_parent(&self) -> ParentType {
&self.first_field
}
}
```
In the codegen files:
```rust
impl Type {
fn __assert_parent_type(&self) {
let _: &ParentType = self.as_parent();
}
}
````
15 lines
250 B
TOML
15 lines
250 B
TOML
[package]
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authors = ["The Servo Project Developers"]
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license = "MPL-2.0"
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name = "dom_struct"
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publish = false
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version = "0.0.1"
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[dependencies]
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quote = "0.6.3"
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syn = { version = "0.14.2", features = ["full"] }
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[lib]
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path = "lib.rs"
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proc-macro = true
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