feat(ast): allow conversion from Expression into Statement with `…

…FromIn` trait. (#4124)

Our downstream rolldown is using this, If we want them to adopt our traits we should provide this implementation for them.

https://github.com/rolldown/rolldown/blob/2cd2a367ee25c3d1f711fda9b1d3ead5982cfcff/crates/rolldown_ecmascript/src/allocator_helpers/into_in.rs#L24

crates/oxc_ast/src/ast_impl/js.rs

@@ -5,8 +5,8 @@ use crate::ast::*;
 
 use std::{cell::Cell, fmt, hash::Hash};
 
-use oxc_allocator::{Box, Vec};
-use oxc_span::{Atom, CompactStr, SourceType, Span};
+use oxc_allocator::{Box, FromIn, Vec};
+use oxc_span::{Atom, CompactStr, GetSpan, SourceType, Span};
 use oxc_syntax::{
     operator::UnaryOperator,
     reference::{ReferenceFlag, ReferenceId},
@@ -665,6 +665,15 @@ impl<'a> Statement<'a> {
     }
 }
 
+impl<'a> FromIn<'a, Expression<'a>> for Statement<'a> {
+    fn from_in(expression: Expression<'a>, alloc: &'a oxc_allocator::Allocator) -> Self {
+        Statement::ExpressionStatement(Box::from_in(
+            ExpressionStatement { span: expression.span(), expression },
+            alloc,
+        ))
+    }
+}
+
 impl<'a> Directive<'a> {
     /// A Use Strict Directive is an ExpressionStatement in a Directive Prologue whose StringLiteral is either of the exact code point sequences "use strict" or 'use strict'.
     /// A Use Strict Directive may not contain an EscapeSequence or LineContinuation.