Parse != as !(==) and !~ as !(=~), for simplicity's sake.

src/op.cc

@@ -117,8 +117,6 @@ value_t expr_t::op_t::calc(scope_t& scope)
     break;
   }
 
-  case O_NEQ:
-    return left()->calc(scope) != right()->calc(scope);
   case O_EQ:
     return left()->calc(scope) == right()->calc(scope);
   case O_LT:
@@ -260,15 +258,6 @@ bool expr_t::op_t::print(std::ostream& out, print_context_t& context) const
     out << ")";
     break;
 
-  case O_NEQ:
-    out << "(";
-    if (left() && left()->print(out, context))
-      found = true;
-    out << " != ";
-    if (right() && right()->print(out, context))
-      found = true;
-    out << ")";
-    break;
   case O_EQ:
     out << "(";
     if (left() && left()->print(out, context))
@@ -415,7 +404,6 @@ void expr_t::op_t::dump(std::ostream& out, const int depth) const
   case O_MUL:	out << "O_MUL"; break;
   case O_DIV:	out << "O_DIV"; break;
 
-  case O_NEQ:	out << "O_NEQ"; break;
   case O_EQ:	out << "O_EQ"; break;
   case O_LT:	out << "O_LT"; break;
   case O_LTE:	out << "O_LTE"; break;

src/op.h

@@ -78,7 +78,6 @@ public:
     UNARY_OPERATORS,
 
     O_EQ,
-    O_NEQ,
     O_LT,
     O_LTE,
     O_GT,

src/token.cc

@@ -172,6 +172,14 @@ void expr_t::token_t::next(std::istream& in, const uint_least8_t pflags)
       length = 2;
       break;
     }
+    else if (c == '~') {
+      in.get(c);
+      symbol[1] = c;
+      symbol[2] = '\0';
+      kind = NMATCH;
+      length = 2;
+      break;
+    }
     kind = EXCLAM;
     break;
 

src/token.h

@@ -55,6 +55,7 @@ struct expr_t::token_t : public noncopyable
 
     ASSIGN,			// =
     MATCH,			// =~
+    NMATCH,			// !~
     MINUS,			// -
     PLUS,			// +
     STAR,			// *