Enabled -Wall for gcc and clang.

tests/CMakeLists.txt

@@ -26,6 +26,7 @@ else()
     else()
       message(STATUS "The compiler ${CMAKE_CXX_COMPILER} has no C++11 support. Please use a different C++ compiler.")
     endif()
+    add_compile_options(-Wall -Wno-missing-braces)
 endif()
 
 if (NOT EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/unittest-cpp)

tests/bounds_tests.cpp

@@ -32,7 +32,9 @@ SUITE(bounds_test)
 	{
 		for (auto point : static_bounds<dynamic_range, 3, 4 > { 2 })
 		{
-			for (decltype(point)::size_type j = 0; j < decltype(point)::rank; j++)
+			for (decltype(point)::size_type j = 0;
+			     j < static_cast<decltype(point)::size_type>(decltype(point)::rank);
+			     j++)
 			{
 				use(j);
 				use(point[j]);
@@ -44,6 +46,7 @@ SUITE(bounds_test)
 	{
 		static_bounds<3, 4, 5> b;
 		auto a = b.slice();
+		(void)a;           
 		static_bounds<4, dynamic_range, 2> x{ 4 };
 		x.slice().slice();
 	}
@@ -53,7 +56,7 @@ SUITE(bounds_test)
 		static_bounds<4, dynamic_range, 2> bounds{ 3 };
 		
 		auto itr = bounds.begin();
-	
+		(void)itr;	
 #ifdef CONFIRM_COMPILATION_ERRORS
 		span<int, 4, dynamic_range, 2> av(nullptr, bounds);
 	
@@ -70,13 +73,14 @@ SUITE(bounds_test)
 	{
 		static_bounds<7, 4, 2> b1;
 		static_bounds<7, dynamic_range, 2> b2 = b1;
-	
+		(void)b2;	
 #ifdef CONFIRM_COMPILATION_ERRORS
 		static_bounds<7, dynamic_range, 1> b4 = b2; 
 #endif
 	
 		static_bounds<dynamic_range, dynamic_range, dynamic_range> b3 = b1;
 		static_bounds<7, 4, 2> b4 = b3; 
+		(void)b4;
 
 		static_bounds<dynamic_range> b11;
 	

tests/notnull_tests.cpp

@@ -69,6 +69,7 @@ SUITE(NotNullTests)
 	MyDerived derived;
 	Unrelated unrelated;
 	not_null<Unrelated*> u = &unrelated;
+        (void)u;
 	not_null<MyDerived*> p = &derived;
         not_null<MyBase*> q = &base;
 	q = p; // allowed with heterogeneous copy ctor

tests/span_tests.cpp

@@ -27,7 +27,6 @@ using namespace gsl;
 
 namespace 
 {
-	void use(int&) {}
 	struct BaseClass {};
 	struct DerivedClass : BaseClass {};
 }
@@ -82,6 +81,7 @@ SUITE(span_tests)
 		span<BaseClass> avb = avd;
 #endif
 		span<const DerivedClass> avcd = avd;
+		(void)avcd;
 	}
 
 	TEST(boundary_checks)
@@ -214,9 +214,11 @@ SUITE(span_tests)
 
 			const std::array<double, 3> arr = {0.0, 0.0, 0.0};
 			auto cv = as_span(arr);
+			(void)cv;
 
 			vector<float> vec(3);
 			auto dv = as_span(vec);
+			(void)dv;
 			
 #ifdef CONFIRM_COMPILATION_ERRORS
 			auto dv2 = as_span(std::move(vec));
@@ -262,6 +264,7 @@ SUITE(span_tests)
 		auto av = as_span(a);
 		auto sub = av.section({15, 0, 0}, gsl::index<3>{2, 2, 2});
 		auto subsub = sub.section({1, 0, 0}, gsl::index<3>{1, 1, 1});
+		(void)subsub;
 	}
 
 	TEST(span_section)
@@ -1417,7 +1420,7 @@ SUITE(span_tests)
 		CHECK_THROW(av1[10][3][4], fail_fast);
 
 		span<const double, dynamic_range, 6, 4> av2 = av1.as_span(dim<>(5), dim<6>(), dim<4>());
-		
+		(void)av2;
 	}
 
 	TEST(span_sub)
@@ -1559,9 +1562,11 @@ SUITE(span_tests)
 		// converting to dynamic_range a_v is always ok
 		{
 			span<int, dynamic_range> av = av4;
+			(void)av;
 		}
 		{
 			span<int, dynamic_range> av = arr;
+			(void)av;
 		}
 
 		// initialization or assignment to static span that REDUCES size is NOT ok
@@ -1577,6 +1582,7 @@ SUITE(span_tests)
 		{
 			span<int, dynamic_range> av = arr;
 			span<int, 2> av2 = av;
+			(void)av2;
 		}
 
 #ifdef CONFIRM_COMPILATION_ERRORS
@@ -1588,7 +1594,7 @@ SUITE(span_tests)
 
 		{
 			span<int, dynamic_range> av = arr;
-			auto f = [&]() {span<int, 2, 1> av2 = av.as_span(dim<>(2), dim<>(2));};
+			auto f = [&]() {span<int, 2, 1> av2 = av.as_span(dim<>(2), dim<>(2)); (void)av2; };
 			CHECK_THROW(f(), fail_fast);
 		}
 
@@ -1597,15 +1603,18 @@ SUITE(span_tests)
 		// you can convert statically
 		{
 			span<int, 2> av2 = {arr, 2};
+			(void)av2;
 		}
 		{
 			span<int, 1> av2 = av4.first<1>();
+			(void)av2;
 		}
 			
 		// ...or dynamically
 		{
 			// NB: implicit conversion to span<int,2> from span<int,dynamic_range>
 			span<int, 1> av2 = av4.first(1); 
+			(void)av2;
 		}
 
 		// initialization or assignment to static span that requires size INCREASE is not ok.
@@ -1621,13 +1630,13 @@ SUITE(span_tests)
 		}
 #endif
 		{
-			auto f = [&]() {span<int, 4> av4 = {arr2, 2};};
+			auto f = [&]() {span<int, 4> av4 = {arr2, 2}; (void)av4; };
 			CHECK_THROW(f(), fail_fast);
 		}
 
 		// this should fail - we are trying to assign a small dynamic a_v to a fixed_size larger one
 		span<int, dynamic_range> av = arr2;
-		auto f = [&](){ span<int, 4> av2 = av; };
+		auto f = [&](){ span<int, 4> av2 = av; (void)av2; };
 		CHECK_THROW(f(), fail_fast);
 	}
 

tests/string_span_tests.cpp

@@ -100,6 +100,7 @@ SUITE(string_span_tests)
     {
         char stack_string[] = "Hello";
         cstring_span<> v = ensure_z(stack_string);
+	(void)v;
 #ifdef CONFIRM_COMPILATION_ERRORS
         string_span<> v2 = v;
         string_span<> v3 = "Hello";