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feat(lua): allow :=expr as a shorter version of :lua =expr

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existing behavior of
  :=
and
  :[range]=

are unchanged. `|` is still allowed with this usage.

However,
   :=p
and similar are changed in a way which could be construed as a breaking
change. Allowing |ex-flags| for := in the first place was a mistake as
any form of := DOES NOT MOVE THE CURSOR. So it would print one line number
and then print a completely different line contents after that.
This commit is contained in:
bfredl
2023-03-20 21:11:10 +01:00
parent 4cba53e09e
commit a92b38934a
10 changed files with 41 additions and 19 deletions
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9
src/nvim/lua/executor.c
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@@ -1621,14 +1621,15 @@ void ex_lua(exarg_T *const eap)
xfree(code);
return;
}
// When =expr is used transform it to print(vim.inspect(expr))
if (code[0] == '=') {
len += sizeof("vim.print()") - sizeof("=");
// When =expr is used transform it to vim.print(expr)
if (eap->cmdidx == CMD_equal || code[0] == '=') {
size_t off = (eap->cmdidx == CMD_equal) ? 0 : 1;
len += sizeof("vim.print()") - 1 - off;
// code_buf needs to be 1 char larger then len for null byte in the end.
// lua nlua_typval_exec doesn't expect null terminated string so len
// needs to end before null byte.
char *code_buf = xmallocz(len);
vim_snprintf(code_buf, len + 1, "vim.print(%s)", code + 1);
vim_snprintf(code_buf, len + 1, "vim.print(%s)", code + off);
xfree(code);
code = code_buf;
}