rpc: Don't delay notifications when request is pending (#6544)

With the old behavior, if a GUI makes a blocking request that requires user
interaction (like nvim_input()), it would not get any screen updates.

The client, not nvim, should decide how to handle notifications during a
pending request. If an rplugin wants to avoid async calls while a sync call is
busy, it likely wants to avoid processing async calls while another async call
also is handled as well.

This may break the expectation of some existing rplugins. For compatibility,
remote/define.vim reimplements the old behavior. Clients can opt-out by
specifying `sync=urgent`.

- Legacy hosts should be updated to use `sync=urgent`. They could add a flag
  indicating which async methods are always safe to call and which must wait
  until the main loop returns.
- New hosts can expose the full asyncness, they don't need to offer both
  behaviors.

ref #6532
ref #1398 d83868fe9071af1b4866594eac12f7aa0fa71b53

1 files changed, 1 insertions, 0 deletions

diff --git a/src/clint.py b/src/clint.py
index 4a41650ec4..e63175a69b 100755
--- a/src/clint.py
+++ b/src/clint.py
@@ -2531,6 +2531,7 @@ def CheckSpacing(filename, clean_lines, linenum, nesting_state, error):
                    r'(?<!\bkhash_t)'
                    r'(?<!\bkbtree_t)'
                    r'(?<!\bkbitr_t)'
+                   r'(?<!\bPMap)'
                    r'\((?:const )?(?:struct )?[a-zA-Z_]\w*(?: *\*(?:const)?)*\)'
                    r' +'
                    r'-?(?:\*+|&)?(?:\w+|\+\+|--|\()', cast_line)