Updated assertion constants so that they aren't exported

regex/compile.go

@@ -871,30 +871,30 @@ func thompson(re []postfixNode) (Reg, error) {
 				if c.lookaroundDir == 0 || c.lookaroundSign == 0 {
 					switch c.contents[0] {
 					case '^':
-						state.assert = SOS
+						state.assert = sosAssert
 					case '$':
-						state.assert = EOS
+						state.assert = eosAssert
 					case 'b':
-						state.assert = WBOUND
+						state.assert = wboundAssert
 					case 'B':
-						state.assert = NONWBOUND
+						state.assert = nonwboundAssert
 					}
 				} else { // Lookaround
 					state.lookaroundRegex = string(c.contents)
 					if c.lookaroundDir == lookahead {
 						if c.lookaroundSign == positive {
-							state.assert = PLA
+							state.assert = plaAssert
 						}
 						if c.lookaroundSign == negative {
-							state.assert = NLA
+							state.assert = nlaAssert
 						}
 					}
 					if c.lookaroundDir == lookbehind {
 						if c.lookaroundSign == positive {
-							state.assert = PLB
+							state.assert = plbAssert
 						}
 						if c.lookaroundSign == negative {
-							state.assert = NLB
+							state.assert = nlbAssert
 						}
 					}
 					tmpRe, err := shuntingYard(state.lookaroundRegex)
@@ -919,7 +919,7 @@ func thompson(re []postfixNode) (Reg, error) {
 		}
 		if c.nodetype == lparenNode || c.nodetype == rparenNode {
 			s := &State{}
-			s.assert = NONE
+			s.assert = noneAssert
 			s.content = newContents(EPSILON)
 			s.isEmpty = true
 			s.output = make([]*State, 0)