如何在命令行模式下打印 vim 寄存器值？

Question

Hey i want to print javap java.lang.Object in vim terminal but not for only 'Object' class but any class that i yanked in particular register.

let say i yanked word Integer with "kyaw in vim so i want to print output of javap java.lang.Integer .

For that i tried this command but that's not working.

:term javap "java.lang.${echo @k}"

but in vim terminal it's giving me error like

zsh:1: bad substitution

i think that echo @k is not working in " so what i do to expand there particular keyword like Object or Integer .

Answer 1

I think it's easier to build the command as a string then run it with :execute :

:execute 'term javap \"java.lang.'..@k..'\"'

or

:execute printf('term javap \"java.lang.%s\"', @k)

Note that the " are escaped with a backslash, and .. is the string concatenation operator.

Answer 2

In the command-line, inserting the content of a register is done with :help c_ctrl-r . In your case:

:term javap java.lang.<C-r>k<CR>

Which could easily be turned into a simplistic mapping:

nnoremap <key> :term javap java.lang.<C-r>k<CR>

And improved by using the word under the cursor directly instead of yanking something in a separate step:

nnoremap <key> :term javap java.lang.<C-r><C-w><CR>