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
              ASM_LABEL
                LABEL_KW "label"
                WHITESPACE " "
                BLOCK_EXPR
                  STMT_LIST
                    L_CURLY "{"
                    R_CURLY "}"
            R_PAREN ")"
          SEMICOLON ";"
        WHITESPACE "\n"
        R_CURLY "}"
  WHITESPACE "\n"
