JsModule {
    bom_token: missing (optional),
    interpreter_token: missing (optional),
    directives: JsDirectiveList [],
    items: JsModuleItemList [
        JsFunctionDeclaration {
            async_token: missing (optional),
            function_token: FUNCTION_KW@0..9 "function" [] [Whitespace(" ")],
            star_token: missing (optional),
            id: JsIdentifierBinding {
                name_token: IDENT@9..12 "foo" [] [],
            },
            type_parameters: missing (optional),
            parameters: JsParameters {
                l_paren_token: L_PAREN@12..13 "(" [] [],
                items: JsParameterList [],
                r_paren_token: R_PAREN@13..15 ")" [] [Whitespace(" ")],
            },
            return_type_annotation: missing (optional),
            body: JsFunctionBody {
                l_curly_token: L_CURLY@15..17 "{" [] [Whitespace(" ")],
                directives: JsDirectiveList [],
                statements: JsStatementList [
                    JsExpressionStatement {
                        expression: JsBogusExpression {
                            items: [
                                YIELD_KW@17..23 "yield" [] [Whitespace(" ")],
                                JsYieldArgument {
                                    star_token: missing (optional),
                                    expression: JsIdentifierExpression {
                                        name: JsReferenceIdentifier {
                                            value_token: IDENT@23..26 "bar" [] [],
                                        },
                                    },
                                },
                            ],
                        },
                        semicolon_token: SEMICOLON@26..28 ";" [] [Whitespace(" ")],
                    },
                ],
                r_curly_token: R_CURLY@28..29 "}" [] [],
            },
        },
        JsFunctionDeclaration {
            async_token: missing (optional),
            function_token: FUNCTION_KW@29..39 "function" [Newline("\n")] [Whitespace(" ")],
            star_token: missing (optional),
            id: JsIdentifierBinding {
                name_token: IDENT@39..42 "foo" [] [],
            },
            type_parameters: missing (optional),
            parameters: JsParameters {
                l_paren_token: L_PAREN@42..43 "(" [] [],
                items: JsParameterList [],
                r_paren_token: R_PAREN@43..45 ")" [] [Whitespace(" ")],
            },
            return_type_annotation: missing (optional),
            body: JsFunctionBody {
                l_curly_token: L_CURLY@45..47 "{" [] [Whitespace(" ")],
                directives: JsDirectiveList [],
                statements: JsStatementList [
                    JsExpressionStatement {
                        expression: JsBogusExpression {
                            items: [
                                YIELD_KW@47..53 "yield" [] [Whitespace(" ")],
                                JsYieldArgument {
                                    star_token: missing (optional),
                                    expression: JsNumberLiteralExpression {
                                        value_token: JS_NUMBER_LITERAL@53..55 "10" [] [],
                                    },
                                },
                            ],
                        },
                        semicolon_token: SEMICOLON@55..57 ";" [] [Whitespace(" ")],
                    },
                ],
                r_curly_token: R_CURLY@57..58 "}" [] [],
            },
        },
    ],
    eof_token: EOF@58..59 "" [Newline("\n")] [],
}

0: JS_MODULE@0..59
  0: (empty)
  1: (empty)
  2: JS_DIRECTIVE_LIST@0..0
  3: JS_MODULE_ITEM_LIST@0..58
    0: JS_FUNCTION_DECLARATION@0..29
      0: (empty)
      1: FUNCTION_KW@0..9 "function" [] [Whitespace(" ")]
      2: (empty)
      3: JS_IDENTIFIER_BINDING@9..12
        0: IDENT@9..12 "foo" [] []
      4: (empty)
      5: JS_PARAMETERS@12..15
        0: L_PAREN@12..13 "(" [] []
        1: JS_PARAMETER_LIST@13..13
        2: R_PAREN@13..15 ")" [] [Whitespace(" ")]
      6: (empty)
      7: JS_FUNCTION_BODY@15..29
        0: L_CURLY@15..17 "{" [] [Whitespace(" ")]
        1: JS_DIRECTIVE_LIST@17..17
        2: JS_STATEMENT_LIST@17..28
          0: JS_EXPRESSION_STATEMENT@17..28
            0: JS_BOGUS_EXPRESSION@17..26
              0: YIELD_KW@17..23 "yield" [] [Whitespace(" ")]
              1: JS_YIELD_ARGUMENT@23..26
                0: (empty)
                1: JS_IDENTIFIER_EXPRESSION@23..26
                  0: JS_REFERENCE_IDENTIFIER@23..26
                    0: IDENT@23..26 "bar" [] []
            1: SEMICOLON@26..28 ";" [] [Whitespace(" ")]
        3: R_CURLY@28..29 "}" [] []
    1: JS_FUNCTION_DECLARATION@29..58
      0: (empty)
      1: FUNCTION_KW@29..39 "function" [Newline("\n")] [Whitespace(" ")]
      2: (empty)
      3: JS_IDENTIFIER_BINDING@39..42
        0: IDENT@39..42 "foo" [] []
      4: (empty)
      5: JS_PARAMETERS@42..45
        0: L_PAREN@42..43 "(" [] []
        1: JS_PARAMETER_LIST@43..43
        2: R_PAREN@43..45 ")" [] [Whitespace(" ")]
      6: (empty)
      7: JS_FUNCTION_BODY@45..58
        0: L_CURLY@45..47 "{" [] [Whitespace(" ")]
        1: JS_DIRECTIVE_LIST@47..47
        2: JS_STATEMENT_LIST@47..57
          0: JS_EXPRESSION_STATEMENT@47..57
            0: JS_BOGUS_EXPRESSION@47..55
              0: YIELD_KW@47..53 "yield" [] [Whitespace(" ")]
              1: JS_YIELD_ARGUMENT@53..55
                0: (empty)
                1: JS_NUMBER_LITERAL_EXPRESSION@53..55
                  0: JS_NUMBER_LITERAL@53..55 "10" [] []
            1: SEMICOLON@55..57 ";" [] [Whitespace(" ")]
        3: R_CURLY@57..58 "}" [] []
  4: EOF@58..59 "" [Newline("\n")] []
--
yield_in_non_generator_function.js:1:18 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × `yield` is only allowed within generator functions.
  
  > 1 │ function foo() { yield bar; }
      │                  ^^^^^
    2 │ function foo() { yield 10; }
    3 │ 
  
--
yield_in_non_generator_function.js:2:18 parse ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━

  × `yield` is only allowed within generator functions.
  
    1 │ function foo() { yield bar; }
  > 2 │ function foo() { yield 10; }
      │                  ^^^^^
    3 │ 
  
--
function foo() { yield bar; }
function foo() { yield 10; }