patch 8.2.2806: Vim9: using "++nr" as a command might not work
Problem: Vim9: using "++nr" as a command might not work.
Solution: Do not recognize "++" and "--" in a following line as addition or
subtraction.
diff --git a/src/eval.c b/src/eval.c
index fbf4f57..97a00f7 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -2856,12 +2856,15 @@
// "." is only string concatenation when scriptversion is 1
// "+=", "-=" and "..=" are assignments
+ // "++" and "--" on the next line are a separate command.
p = eval_next_non_blank(*arg, evalarg, &getnext);
op = *p;
concat = op == '.' && (*(p + 1) == '.' || current_sctx.sc_version < 2);
if ((op != '+' && op != '-' && !concat) || p[1] == '='
|| (p[1] == '.' && p[2] == '='))
break;
+ if (getnext && (op == '+' || op == '-') && p[0] == p[1])
+ break;
evaluate = evalarg == NULL ? 0 : (evalarg->eval_flags & EVAL_EVALUATE);
oplen = (concat && p[1] == '.') ? 2 : 1;