JsScript {
    bom_token: missing (optional),
    interpreter_token: missing (optional),
    directives: JsDirectiveList [],
    statements: JsStatementList [
        JsExpressionStatement {
            expression: JsBogusExpression {
                items: [
                    YIELD_KW@0..16 "yield" [Comments("// SCRIPT"), Newline("\n")] [Whitespace(" ")],
                    JsYieldArgument {
                        star_token: missing (optional),
                        expression: JsNumberLiteralExpression {
                            value_token: JS_NUMBER_LITERAL@16..18 "10" [] [],
                        },
                    },
                ],
            },
            semicolon_token: SEMICOLON@18..19 ";" [] [],
        },
    ],
    eof_token: EOF@19..20 "" [Newline("\n")] [],
}

0: JS_SCRIPT@0..20
  0: (empty)
  1: (empty)
  2: JS_DIRECTIVE_LIST@0..0
  3: JS_STATEMENT_LIST@0..19
    0: JS_EXPRESSION_STATEMENT@0..19
      0: JS_BOGUS_EXPRESSION@0..18
        0: YIELD_KW@0..16 "yield" [Comments("// SCRIPT"), Newline("\n")] [Whitespace(" ")]
        1: JS_YIELD_ARGUMENT@16..18
          0: (empty)
          1: JS_NUMBER_LITERAL_EXPRESSION@16..18
            0: JS_NUMBER_LITERAL@16..18 "10" [] []
      1: SEMICOLON@18..19 ";" [] []
  4: EOF@19..20 "" [Newline("\n")] []
--
yield_at_top_level_script.js:2:1 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × `yield` is only allowed within generator functions.
  
    1 │ // SCRIPT
  > 2 │ yield 10;
      │ ^^^^^
    3 │ 
  
--
// SCRIPT
yield 10;