Support gcc8 (students...)

src/codeGen/BasicBlock.h

@@ -62,7 +62,7 @@ public:
 		set<VariablePtr> in, out, def, use;
 		BasicBlock *b {};
 		void addUse(const VariablePtr& v) {
-			if (!def.contains(v)) use.emplace(v);
+			if (!def.count(v)) use.emplace(v);
 		}
 
 		void addDef(const VariablePtr &v) {

src/codeGen/Quadruple.h

@@ -347,7 +347,7 @@ public:
 		auto self = shared_from_this();
 		for (const auto& b : phi) {
 			for (const auto &v : b) {
-				if (!written.contains(v.first)) {
+				if (!written.count(v.first)) {
 					v.first->writes.emplace_back(self);
 					written.emplace(v.first);
 				}

src/codeGen/Variable.h

@@ -3,6 +3,7 @@
 
 #include <utility>
 #include <map>
+#include <algorithm>
 
 #include "../TypeDefs.h"
 #include "../Info.h"
@@ -29,8 +30,8 @@ public:
 	int localOffset = 0;
 
 	void clear(const QuadruplePtr& q) {
-		uses.erase(std::remove(uses.begin(), uses.end(), q), uses.end());
-		writes.erase(std::remove(writes.begin(), writes.end(), q), writes.end());
+		uses.erase(std::remove_if(uses.begin(), uses.end(), [&q](const QuadruplePtr &el) { return el == q; }), uses.end());
+		writes.erase(std::remove_if(writes.begin(), writes.end(), [&q](const QuadruplePtr &el) { return el == q; }), writes.end());
 	}
 };