commit 7b668e83d0635d082b7ec90d7d2aa30a9d7d8928
author Bram Moolenaar <Bram@vim.org> Tue Aug 23 23:51:21 2016 +0200
committer Bram Moolenaar <Bram@vim.org> Tue Aug 23 23:51:21 2016 +0200
tree 5a766b46ad4395652cfe4d2545ee809047384fc9
parent 1b58cdd160c2e0ada0f638679a2aa27e4665fc48

patch 7.4.2244
Problem:    Adding pattern to ":oldfiles" is not a generic solution.
Solution:   Add the ":filter /pat/ cmd" command modifier.  Only works for some
            commands right now.

src/ex_docmd.c

diff --git a/src/ex_docmd.c b/src/ex_docmd.c
index 9f1d227..94216b3 100644
--- a/src/ex_docmd.c
+++ b/src/ex_docmd.c
@@ -1781,6 +1781,7 @@
     linenr_T		lnum;
     long		n;
     char_u		*errormsg = NULL;	/* error message */
+    char_u		*after_modifier = NULL;
     exarg_T		ea;			/* Ex command arguments */
     long		verbose_save = -1;
     int			save_msg_scroll = msg_scroll;
@@ -1917,6 +1918,24 @@
 			cmdmod.keepjumps = TRUE;
 			continue;
 
+	    case 'f':	/* only accept ":filter {pat} cmd" */
+			{
+			    char_u *reg_pat;
+
+			    if (!checkforcmd(&p, "filter", 4)
+						|| *p == NUL || ends_excmd(*p))
+				break;
+			    p = skip_vimgrep_pat(p, &reg_pat, NULL);
+			    if (p == NULL || *p == NUL)
+				break;
+			    cmdmod.filter_regmatch.regprog =
+						vim_regcomp(reg_pat, RE_MAGIC);
+			    if (cmdmod.filter_regmatch.regprog == NULL)
+				break;
+			    ea.cmd = p;
+			    continue;
+			}
+
 			/* ":hide" and ":hide | cmd" are not modifiers */
 	    case 'h':	if (p != ea.cmd || !checkforcmd(&p, "hide", 3)
 					       || *p == NUL || ends_excmd(*p))
@@ -2041,6 +2060,7 @@
 	}
 	break;
     }
+    after_modifier = ea.cmd;
 
 #ifdef FEAT_EVAL
     ea.skip = did_emsg || got_int || did_throw || (cstack->cs_idx >= 0
@@ -2374,7 +2394,14 @@
 	{
 	    STRCPY(IObuff, _("E492: Not an editor command"));
 	    if (!sourcing)
-		append_command(*cmdlinep);
+	    {
+		/* If the modifier was parsed OK the error must be in the
+		 * following command */
+		if (after_modifier != NULL)
+		    append_command(after_modifier);
+		else
+		    append_command(*cmdlinep);
+	    }
 	    errormsg = IObuff;
 	    did_emsg_syntax = TRUE;
 	}
@@ -2818,6 +2845,7 @@
 	    case CMD_echomsg:
 	    case CMD_echon:
 	    case CMD_execute:
+	    case CMD_filter:
 	    case CMD_help:
 	    case CMD_hide:
 	    case CMD_ijump:
@@ -2989,6 +3017,8 @@
 	free_string_option(cmdmod.save_ei);
     }
 #endif
+    if (cmdmod.filter_regmatch.regprog != NULL)
+	vim_regfree(cmdmod.filter_regmatch.regprog);
 
     cmdmod = save_cmdmod;
 
@@ -3323,6 +3353,7 @@
     {"botright", 2, FALSE},
     {"browse", 3, FALSE},
     {"confirm", 4, FALSE},
+    {"filter", 4, FALSE},
     {"hide", 3, FALSE},
     {"keepalt", 5, FALSE},
     {"keepjumps", 5, FALSE},
@@ -3833,6 +3864,7 @@
 	case CMD_cfdo:
 	case CMD_confirm:
 	case CMD_debug:
+	case CMD_filter:
 	case CMD_folddoclosed:
 	case CMD_folddoopen:
 	case CMD_hide: