Treat <> and << operators as < and >< and >> as > in scripts

(bug #4597)

CHANGELOG.md

@@ -98,6 +98,7 @@
     Bug #4575: Weird result of attack animation blending with movement animations
     Bug #4576: Reset of idle animations when attack can not be started
     Bug #4591: Attack strength should be 0 if player did not hold the attack button
+    Bug #4597: <> operator causes a compile error
     Feature #1645: Casting effects from objects
     Feature #2606: Editor: Implemented (optional) case sensitive global search
     Feature #3083: Play animation when NPC is casting spell via script

components/compiler/scanner.cpp

@@ -502,6 +502,11 @@ namespace Compiler
                     if (get (c) && c!='=') // <== is a allowed as an alternative to <=  :(
                         putback (c);
                 }
+                else if (c == '<' || c == '>') // Treat <> and << as <
+                {
+                    special = S_cmpLT;
+                    mErrorHandler.warning (std::string("invalid operator <") + c + ", treating it as <", mLoc);
+                }
                 else
                 {
                     putback (c);
@@ -525,6 +530,11 @@ namespace Compiler
                     if (get (c) && c!='=') // >== is a allowed as an alternative to >=  :(
                         putback (c);
                 }
+                else if (c == '<' || c == '>') // Treat >< and >> as >
+                {
+                    special = S_cmpGT;
+                    mErrorHandler.warning (std::string("invalid operator >") + c + ", treating it as >", mLoc);
+                }
                 else
                 {
                     putback (c);