JsModule {
    bom_token: missing (optional),
    interpreter_token: missing (optional),
    directives: JsDirectiveList [],
    items: JsModuleItemList [
        JsFunctionDeclaration {
            async_token: missing (optional),
            function_token: FUNCTION_KW@0..8 "function" [] [],
            star_token: STAR@8..10 "*" [] [Whitespace(" ")],
            id: JsIdentifierBinding {
                name_token: IDENT@10..14 "test" [] [],
            },
            type_parameters: missing (optional),
            parameters: JsParameters {
                l_paren_token: L_PAREN@14..15 "(" [] [],
                items: JsParameterList [
                    JsFormalParameter {
                        decorators: JsDecoratorList [],
                        binding: JsIdentifierBinding {
                            name_token: IDENT@15..17 "a" [] [Whitespace(" ")],
                        },
                        question_mark_token: missing (optional),
                        type_annotation: missing (optional),
                        initializer: JsInitializerClause {
                            eq_token: EQ@17..19 "=" [] [Whitespace(" ")],
                            expression: JsBogusExpression {
                                items: [
                                    YIELD_KW@19..25 "yield" [] [Whitespace(" ")],
                                    JsYieldArgument {
                                        star_token: missing (optional),
                                        expression: JsStringLiteralExpression {
                                            value_token: JS_STRING_LITERAL@25..31 "\"test\"" [] [],
                                        },
                                    },
                                ],
                            },
                        },
                    },
                ],
                r_paren_token: R_PAREN@31..33 ")" [] [Whitespace(" ")],
            },
            return_type_annotation: missing (optional),
            body: JsFunctionBody {
                l_curly_token: L_CURLY@33..34 "{" [] [],
                directives: JsDirectiveList [],
                statements: JsStatementList [],
                r_curly_token: R_CURLY@34..35 "}" [] [],
            },
        },
        JsFunctionDeclaration {
            async_token: missing (optional),
            function_token: FUNCTION_KW@35..45 "function" [Newline("\n")] [Whitespace(" ")],
            star_token: missing (optional),
            id: JsIdentifierBinding {
                name_token: IDENT@45..50 "test2" [] [],
            },
            type_parameters: missing (optional),
            parameters: JsParameters {
                l_paren_token: L_PAREN@50..51 "(" [] [],
                items: JsParameterList [
                    JsFormalParameter {
                        decorators: JsDecoratorList [],
                        binding: JsIdentifierBinding {
                            name_token: IDENT@51..53 "a" [] [Whitespace(" ")],
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                        question_mark_token: missing (optional),
                        type_annotation: missing (optional),
                        initializer: JsInitializerClause {
                            eq_token: EQ@53..55 "=" [] [Whitespace(" ")],
                            expression: JsBogusExpression {
                                items: [
                                    YIELD_KW@55..61 "yield" [] [Whitespace(" ")],
                                    JsYieldArgument {
                                        star_token: missing (optional),
                                        expression: JsStringLiteralExpression {
                                            value_token: JS_STRING_LITERAL@61..67 "\"test\"" [] [],
                                        },
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                                ],
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                        },
                    },
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                r_paren_token: R_PAREN@67..69 ")" [] [Whitespace(" ")],
            },
            return_type_annotation: missing (optional),
            body: JsFunctionBody {
                l_curly_token: L_CURLY@69..70 "{" [] [],
                directives: JsDirectiveList [],
                statements: JsStatementList [],
                r_curly_token: R_CURLY@70..71 "}" [] [],
            },
        },
    ],
    eof_token: EOF@71..72 "" [Newline("\n")] [],
}

0: JS_MODULE@0..72
  0: (empty)
  1: (empty)
  2: JS_DIRECTIVE_LIST@0..0
  3: JS_MODULE_ITEM_LIST@0..71
    0: JS_FUNCTION_DECLARATION@0..35
      0: (empty)
      1: FUNCTION_KW@0..8 "function" [] []
      2: STAR@8..10 "*" [] [Whitespace(" ")]
      3: JS_IDENTIFIER_BINDING@10..14
        0: IDENT@10..14 "test" [] []
      4: (empty)
      5: JS_PARAMETERS@14..33
        0: L_PAREN@14..15 "(" [] []
        1: JS_PARAMETER_LIST@15..31
          0: JS_FORMAL_PARAMETER@15..31
            0: JS_DECORATOR_LIST@15..15
            1: JS_IDENTIFIER_BINDING@15..17
              0: IDENT@15..17 "a" [] [Whitespace(" ")]
            2: (empty)
            3: (empty)
            4: JS_INITIALIZER_CLAUSE@17..31
              0: EQ@17..19 "=" [] [Whitespace(" ")]
              1: JS_BOGUS_EXPRESSION@19..31
                0: YIELD_KW@19..25 "yield" [] [Whitespace(" ")]
                1: JS_YIELD_ARGUMENT@25..31
                  0: (empty)
                  1: JS_STRING_LITERAL_EXPRESSION@25..31
                    0: JS_STRING_LITERAL@25..31 "\"test\"" [] []
        2: R_PAREN@31..33 ")" [] [Whitespace(" ")]
      6: (empty)
      7: JS_FUNCTION_BODY@33..35
        0: L_CURLY@33..34 "{" [] []
        1: JS_DIRECTIVE_LIST@34..34
        2: JS_STATEMENT_LIST@34..34
        3: R_CURLY@34..35 "}" [] []
    1: JS_FUNCTION_DECLARATION@35..71
      0: (empty)
      1: FUNCTION_KW@35..45 "function" [Newline("\n")] [Whitespace(" ")]
      2: (empty)
      3: JS_IDENTIFIER_BINDING@45..50
        0: IDENT@45..50 "test2" [] []
      4: (empty)
      5: JS_PARAMETERS@50..69
        0: L_PAREN@50..51 "(" [] []
        1: JS_PARAMETER_LIST@51..67
          0: JS_FORMAL_PARAMETER@51..67
            0: JS_DECORATOR_LIST@51..51
            1: JS_IDENTIFIER_BINDING@51..53
              0: IDENT@51..53 "a" [] [Whitespace(" ")]
            2: (empty)
            3: (empty)
            4: JS_INITIALIZER_CLAUSE@53..67
              0: EQ@53..55 "=" [] [Whitespace(" ")]
              1: JS_BOGUS_EXPRESSION@55..67
                0: YIELD_KW@55..61 "yield" [] [Whitespace(" ")]
                1: JS_YIELD_ARGUMENT@61..67
                  0: (empty)
                  1: JS_STRING_LITERAL_EXPRESSION@61..67
                    0: JS_STRING_LITERAL@61..67 "\"test\"" [] []
        2: R_PAREN@67..69 ")" [] [Whitespace(" ")]
      6: (empty)
      7: JS_FUNCTION_BODY@69..71
        0: L_CURLY@69..70 "{" [] []
        1: JS_DIRECTIVE_LIST@70..70
        2: JS_STATEMENT_LIST@70..70
        3: R_CURLY@70..71 "}" [] []
  4: EOF@71..72 "" [Newline("\n")] []
--
yield_expr_in_parameter_initializer.js:1:20 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × `yield` is only allowed within generator functions.
  
  > 1 │ function* test(a = yield "test") {}
      │                    ^^^^^
    2 │ function test2(a = yield "test") {}
    3 │ 
  
--
yield_expr_in_parameter_initializer.js:2:20 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × `yield` is only allowed within generator functions.
  
    1 │ function* test(a = yield "test") {}
  > 2 │ function test2(a = yield "test") {}
      │                    ^^^^^
    3 │ 
  
--
function* test(a = yield "test") {}
function test2(a = yield "test") {}