fix(ast): estree compat Function (#8972)

Part of #2854

diff of estree_test262.snap

```diff
-Positive Passed: 6233/44293 (14.07%)
+Positive Passed: 13042/44293 (29.44%)
```

crates/oxc_ast/src/ast/js.rs

@@ -1557,7 +1557,11 @@ pub struct BindingRestElement<'a> {
 #[generate_derive(CloneIn, GetSpan, GetSpanMut, ContentEq, ESTree)]
 // https://github.com/estree/estree/blob/master/es5.md#patterns
 // https://github.com/DefinitelyTyped/DefinitelyTyped/blob/cd61c555bfc93e985b313263a42ed78074570d08/types/estree/index.d.ts#L411
-#[estree(add_ts_def = "type ParamPattern = FormalParameter | FormalParameterRest")]
+#[estree(
+    add_ts_def = "type ParamPattern = FormalParameter | FormalParameterRest",
+    add_fields(expression = false),
+    add_ts = "expression: false"
+)]
 pub struct Function<'a> {
     pub span: Span,
     pub r#type: FunctionType,
@@ -1695,9 +1699,11 @@ pub enum FormalParameterKind {
 #[ast(visit)]
 #[derive(Debug)]
 #[generate_derive(CloneIn, GetSpan, GetSpanMut, ContentEq, ESTree)]
+#[estree(rename = "BlockStatement")]
 pub struct FunctionBody<'a> {
     pub span: Span,
     pub directives: Vec<'a, Directive<'a>>,
+    #[estree(rename = "body")]
     pub statements: Vec<'a, Statement<'a>>,
 }
 

crates/oxc_ast/src/generated/derive_estree.rs

@@ -1334,6 +1334,7 @@ impl Serialize for Function<'_> {
         map.serialize_entry("params", &self.params)?;
         map.serialize_entry("returnType", &self.return_type)?;
         map.serialize_entry("body", &self.body)?;
+        map.serialize_entry("expression", &false)?;
         map.end()
     }
 }
@@ -1399,11 +1400,11 @@ impl Serialize for FormalParameterKind {
 impl Serialize for FunctionBody<'_> {
     fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
         let mut map = serializer.serialize_map(None)?;
-        map.serialize_entry("type", "FunctionBody")?;
+        map.serialize_entry("type", "BlockStatement")?;
         map.serialize_entry("start", &self.span.start)?;
         map.serialize_entry("end", &self.span.end)?;
         map.serialize_entry("directives", &self.directives)?;
-        map.serialize_entry("statements", &self.statements)?;
+        map.serialize_entry("body", &self.statements)?;
         map.end()
     }
 }

npm/oxc-types/types.d.ts

@@ -540,6 +540,7 @@ export interface Function extends Span {
   params: ParamPattern[];
   returnType: TSTypeAnnotation | null;
   body: FunctionBody | null;
+  expression: false;
 }
 
 export type ParamPattern = FormalParameter | FormalParameterRest;
@@ -576,9 +577,9 @@ export type FormalParameter =
 export type FormalParameterKind = 'FormalParameter' | 'UniqueFormalParameters' | 'ArrowFormalParameters' | 'Signature';
 
 export interface FunctionBody extends Span {
-  type: 'FunctionBody';
+  type: 'BlockStatement';
   directives: Array<Directive>;
-  statements: Array<Statement>;
+  body: Array<Statement>;
 }
 
 export interface ArrowFunctionExpression extends Span {