Show errors for methods that are unused. (bug 6183)

plugins/sounds.sp

@@ -87,7 +87,7 @@ public Action Command_Play(int client, int args)
 	}
 	
 	char target_name[MAX_TARGET_LENGTH];
-	char target_list[MAXPLAYERS], target_count;
+	int target_list[MAXPLAYERS], target_count;
 	bool tn_is_ml;
 	
 	if ((target_count = ProcessTargetString(

sourcepawn/compiler/sc.h

@@ -924,6 +924,7 @@ SC_VDECL int indent_nowarn;   /* skip warning "217 loose indentation" */
 SC_VDECL int sc_tabsize;      /* number of spaces that a TAB represents */
 SC_VDECL short sc_allowtags;  /* allow/detect tagnames in lex() */
 SC_VDECL int sc_status;       /* read/write status */
+SC_VDECL int sc_err_status;   /* TRUE if errors should be generated even if sc_status = SKIP */
 SC_VDECL int sc_rationaltag;  /* tag for rational numbers */
 SC_VDECL int rational_digits; /* number of fractional digits */
 SC_VDECL int sc_allowproccall;/* allow/detect tagnames in lex() */

sourcepawn/compiler/sc1.c

@@ -5261,13 +5261,20 @@ static int newfunc(declinfo_t *decl, const int *thistag, int fpublic, int fstati
     return TRUE;
   } /* if */
   /* so it is not a prototype, proceed */
+
   /* if this is a function that is not referred to (this can only be detected
    * in the second stage), shut code generation off */
   if (sc_status==statWRITE && (sym->usage & uREAD)==0 && !fpublic) {
-    sc_status=statSKIP;
     cidx=code_idx;
     glbdecl=glb_declared;
+
+    sc_status=statSKIP;
+
+    // If this is a method, output errors even if it's unused.
+    if (thistag && *thistag != -1)
+      sc_err_status = TRUE;
   } /* if */
+
   if ((sym->flags & flgDEPRECATED) != 0 && (sym->usage & uSTOCK) == 0) {
     char *ptr= (sym->documentation!=NULL) ? sym->documentation : "";
     error(234, decl->name, ptr);  /* deprecated (probably a public function) */
@@ -5371,6 +5378,7 @@ static int newfunc(declinfo_t *decl, const int *thistag, int fpublic, int fstati
     sc_status=statWRITE;
     code_idx=cidx;
     glb_declared=glbdecl;
+    sc_err_status=FALSE;
   } /* if */
   if (symp)
     *symp = sym;

sourcepawn/compiler/sc5.c

@@ -86,8 +86,13 @@ static short lastfile;
    * the error reporting is enabled only in the second pass (and only when
    * actually producing output). Fatal errors may never be ignored.
    */
-  if ((errflag || sc_status!=statWRITE) && (number<160 || number>=200))
+  int is_fatal = (number < 160 || number > 200);
+  if (errflag && is_fatal)
     return 0;
+  if (sc_status != statWRITE && is_fatal) {
+    if (!sc_err_status)
+      return 0;
+  }
 
   /* also check for disabled warnings */
   if (number>=200) {

sourcepawn/compiler/scvars.c

@@ -83,6 +83,7 @@ SC_VDEFINE int indent_nowarn=FALSE;/* skip warning "217 loose indentation" */
 SC_VDEFINE int sc_tabsize=8;       /* number of spaces that a TAB represents */
 SC_VDEFINE short sc_allowtags=TRUE;  /* allow/detect tagnames in lex() */
 SC_VDEFINE int sc_status;          /* read/write status */
+SC_VDEFINE int sc_err_status;
 SC_VDEFINE int sc_rationaltag=0;   /* tag for rational numbers */
 SC_VDEFINE int rational_digits=0;  /* number of fractional digits */
 SC_VDEFINE int sc_allowproccall=0; /* allow/detect tagnames in lex() */

sourcepawn/compiler/tests/fail-methodmap-missing-method.sp

@@ -0,0 +1,13 @@
+methodmap Duck
+{
+	public void MyFunc()
+	{
+		// this will compile fine until this function is used elsewhere in code
+		ThisFuncDoesntExist();
+	}
+};
+
+public OnPluginStart()
+{
+}
+

sourcepawn/compiler/tests/fail-methodmap-missing-method.txt

@@ -0,0 +1 @@
+(6) : error 017: undefined symbol "ThisFuncDoesntExist"