SOURCE_FILE
  FN
    FN_KW "fn"
    WHITESPACE " "
    NAME
      IDENT "foo"
    PARAM_LIST
      L_PAREN "("
      R_PAREN ")"
    WHITESPACE " "
    BLOCK_EXPR
      STMT_LIST
        L_CURLY "{"
        WHITESPACE "\n    "
        EXPR_STMT
          ASM_EXPR
            BUILTIN_KW "builtin"
            POUND "#"
            ASM_KW "asm"
            L_PAREN "("
            LITERAL
              STRING "\"\""
            R_PAREN ")"
          SEMICOLON ";"
        WHITESPACE "\n    "
        EXPR_STMT
          FORMAT_ARGS_EXPR
            BUILTIN_KW "builtin"
            POUND "#"
            FORMAT_ARGS_KW "format_args"
            L_PAREN "("
            LITERAL
              STRING "\"\""
            COMMA ","
            WHITESPACE " "
            FORMAT_ARGS_ARG
              LITERAL
                INT_NUMBER "0"
            COMMA ","
            WHITESPACE " "
            FORMAT_ARGS_ARG
              LITERAL
                INT_NUMBER "1"
            COMMA ","
            WHITESPACE " "
            FORMAT_ARGS_ARG
              NAME
                IDENT "a"
              WHITESPACE " "
              EQ "="
              WHITESPACE " "
              BIN_EXPR
                LITERAL
                  INT_NUMBER "2"
                WHITESPACE " "
                PLUS "+"
                WHITESPACE " "
                LITERAL
                  INT_NUMBER "3"
            COMMA ","
            WHITESPACE " "
            FORMAT_ARGS_ARG
              BIN_EXPR
                PATH_EXPR
                  PATH
                    PATH_SEGMENT
                      NAME_REF
                        IDENT "a"
                WHITESPACE " "
                PLUS "+"
                WHITESPACE " "
                PATH_EXPR
                  PATH
                    PATH_SEGMENT
                      NAME_REF
                        IDENT "b"
            R_PAREN ")"
          SEMICOLON ";"
        WHITESPACE "\n    "
        EXPR_STMT
          OFFSET_OF_EXPR
            BUILTIN_KW "builtin"
            POUND "#"
            OFFSET_OF_KW "offset_of"
            L_PAREN "("
            PATH_TYPE
              PATH
                PATH_SEGMENT
                  NAME_REF
                    IDENT "Foo"
            COMMA ","
            WHITESPACE " "
            NAME_REF
              IDENT "bar"
            DOT "."
            NAME_REF
              IDENT "baz"
            DOT "."
            NAME_REF
              INT_NUMBER "0"
            R_PAREN ")"
          SEMICOLON ";"
        WHITESPACE "\n"
        R_CURLY "}"
  WHITESPACE "\n"
