那应该行得通。这是来自 Emacs 23.1.1:
buffer-substring is a built-in function in `C source code'.
(buffer-substring start end)
Return the contents of part of the current buffer as a string.
The two arguments start and end are character positions;
they can be in either order.
The string returned is multibyte if the buffer is multibyte.
This function copies the text properties of that part of the buffer
into the result string; if you don't want the text properties,
use `buffer-substring-no-properties' instead.
您可以交互地使用该命令describe-text-properties
来查看您实际得到了什么:
describe-text-properties is an interactive compiled Lisp function in
`descr-text.el'.
It is bound to <C-down-mouse-2> <dp>, <menu-bar> <edit> <props> <dp>.
(describe-text-properties pos &optional output-buffer)
Describe widgets, buttons, overlays and text properties at pos.
Interactively, describe them for the character after point.
If optional second argument output-buffer is non-nil,
insert the output into that buffer, and don't initialize or clear it
otherwise.