1 files changed, 28 insertions, 0 deletions
diff --git a/third_party/rust/wast/src/component/custom.rs b/third_party/rust/wast/src/component/custom.rs
new file mode 100644
index 0000000000..b17a7fafb4
--- /dev/null
+++ b/third_party/rust/wast/src/component/custom.rs
@@ -0,0 +1,28 @@
+use crate::annotation;
+use crate::parser::{Parse, Parser, Result};
+use crate::token::Span;
+
+/// A custom section within a component.
+#[derive(Debug)]
+pub struct Custom<'a> {
+    /// Where this `@custom` was defined.
+    pub span: Span,
+
+    /// Name of the custom section.
+    pub name: &'a str,
+
+    /// Payload of this custom section.
+    pub data: Vec<&'a [u8]>,
+}
+
+impl<'a> Parse<'a> for Custom<'a> {
+    fn parse(parser: Parser<'a>) -> Result<Self> {
+        let span = parser.parse::<annotation::custom>()?.0;
+        let name = parser.parse()?;
+        let mut data = Vec::new();
+        while !parser.is_empty() {
+            data.push(parser.parse()?);
+        }
+        Ok(Self { span, name, data })
+    }
+}