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 "\"\""
            COMMA ","
            WHITESPACE " "
            ASM_OPERAND_NAMED
              NAME
                IDENT "f"
              WHITESPACE " "
              EQ "="
              WHITESPACE " "
              ASM_SYM
                SYM_KW "sym"
                WHITESPACE " "
                L_PAREN "("
                PATH
                  PATH
                    PATH_SEGMENT
                      NAME_REF
                        IDENT "foo"
                  COLON2 "::"
                  PATH_SEGMENT
                    NAME_REF
                      IDENT "bar"
                R_PAREN ")"
            R_PAREN ")"
          SEMICOLON ";"
        WHITESPACE "\n"
        R_CURLY "}"
  WHITESPACE "\n"
