patch 8.2.2784: Vim9: cannot use \=expr in :substitute
Problem: Vim9: cannot use \=expr in :substitute.
Solution: Compile the expression into instructions and execute them when
invoked.
diff --git a/src/ex_cmds.c b/src/ex_cmds.c
index 6cd54d2..96ff6ec 100644
--- a/src/ex_cmds.c
+++ b/src/ex_cmds.c
@@ -3604,6 +3604,29 @@
} subflags_T;
/*
+ * Skip over the "sub" part in :s/pat/sub/ where "delimiter" is the separating
+ * character.
+ */
+ char_u *
+skip_substitute(char_u *start, int delimiter)
+{
+ char_u *p = start;
+
+ while (p[0])
+ {
+ if (p[0] == delimiter) // end delimiter found
+ {
+ *p++ = NUL; // replace it with a NUL
+ break;
+ }
+ if (p[0] == '\\' && p[1] != 0) // skip escaped characters
+ ++p;
+ MB_PTR_ADV(p);
+ }
+ return p;
+}
+
+/*
* Perform a substitution from line eap->line1 to line eap->line2 using the
* command pointed to by eap->arg which should be of the form:
*
@@ -3704,18 +3727,7 @@
* Vim we want to use '\n' to find/substitute a NUL.
*/
sub = cmd; // remember the start of the substitution
-
- while (cmd[0])
- {
- if (cmd[0] == delimiter) // end delimiter found
- {
- *cmd++ = NUL; // replace it with a NUL
- break;
- }
- if (cmd[0] == '\\' && cmd[1] != 0) // skip escaped characters
- ++cmd;
- MB_PTR_ADV(cmd);
- }
+ cmd = skip_substitute(cmd, delimiter);
if (!eap->skip)
{