I set a variable b:aaa which has the value that I can see via echo b:aaa, how can I copy that to text? I know I can do it by

set @a = b:aaa

to get it. But can I copy it to the an open file directly?

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    Copy to what text? It's all text. If you mean using it in insert mode: <c-r>=b:aaa – Tommy A Apr 10 '17 at 14:26
  • @TommyA I'd like to accept your answer. – Lerner Zhang Apr 10 '17 at 15:26
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    That's a technical detail that's left to you. But yes, wrapping it in string() would add safety. – Tommy A Apr 10 '17 at 16:25
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    Are you just wanting to put the contents of a variable into a buffer? e.g. :put=b:aaa – Peter Rincker Apr 10 '17 at 16:35
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    Additionaly see getreg() and setreg() functions for setting the register to a specific value. And also see :h let-option for setting the option to a variable. – Christian Brabandt Apr 10 '17 at 17:07

To put the value of a variable into a buffer use the :put command with the expression register, @=:


You can use a range with :put to put it at a specific location. Put below the 9th line:


Note: use :put! to put above the current line

For more help see:

:h :put
:h @=
:h :range

Registers works like variables, so you are almost done. I think this would work for you:

let @a = b:aaa
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    Better use setreg() function. – Christian Brabandt Apr 10 '17 at 17:07
  • I didn't know about the setreg() function, it seems to be more functional because allow line wise and block wise selection. Also the :put solution Peter Rincker mentions is good – rbernabe Apr 10 '17 at 18:22
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    Why is setreg() better @ChristianBrabandt? I thought it just existed to support things like setreg(l:some_var, "val")? – Martin Tournoij Apr 11 '17 at 20:08
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    @Carpetsmoker because you can force the register to actually behave like linewise, characterwise or blockwise – Christian Brabandt Apr 11 '17 at 20:21

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