Change class to readonly struct in interface.rs (#1373)

andreakarasho · web-flow · commit 545dc8d2281c · 2025-09-23T19:45:18.000Z
By design the `record` wit type is just a set of fields (https://component-model.bytecodealliance.org/design/wit.html#records) This PR aims to reduce the GC work changing from a `class` to a `readonly struct`.
diff --git a/crates/csharp/src/interface.rs b/crates/csharp/src/interface.rs
@@ -995,7 +995,7 @@ impl<'a> CoreInterfaceGenerator<'a> for InterfaceGenerator<'a> {
         uwrite!(
             self.src,
             "
-            {access} class {name} {{
+            {access} readonly struct {name} {{
                 {fields}
 
                 {access} {name}({parameters}) {{

Original file line number	Diff line number	Diff line change
`@@ -995,7 +995,7 @@ impl<'a> CoreInterfaceGenerator<'a> for InterfaceGenerator<'a> {`
`995`	`995`	`uwrite!(`
`996`	`996`	`self.src,`
`997`	`997`	`"`
`998`		`- {access} class {name} {{`
	`998`	`+ {access} readonly struct {name} {{`
`999`	`999`	`{fields}`
`1000`	`1000`
`1001`	`1001`	`{access} {name}({parameters}) {{`