Print an error message without "Error detected while processing function"

Question

If I type:

:echoerr "test error"

I simply get the message printed (with red background):

test error

However, inside a function:

function! Printerror()
  echoerr "test error"
endfunction

I get additional (and in this particular case) unwanted extra lines:

Error detected while processing function Printerror:
line    1:
test error
Press ENTER or type command to continue

How can I supress the additional lines produced in a function?

Answer 1

The solution is described in the manual:

If you just want a highlighted message use :echohl. And to get a beep: :exe "normal \<Esc>"

Thus:

function! PrintError(msg) abort
    execute 'normal! \<Esc>'
    echohl ErrorMsg
    echomsg a:msg
    echohl None
endfunction