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5.2 The Definition of insert-buffer

insert-buffer is yet another buffer-related function. This command copies another buffer into the current buffer. It is the reverse of append-to-buffer or copy-to-buffer, since they copy a region of text from the current buffer to another buffer.

In addition, this code illustrates the use of interactive with a buffer that might be read-only and the important distinction between the name of an object and the object actually referred to.

• insert-buffer code:
• insert-buffer interactive: When you can read, but not write.
• insert-buffer body: The body has an or and a let.
• if & or: Using an if instead of an or.
• Insert or: How the or expression works.
• Insert let: Two save-excursion expressions.