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-rw-r--r--src/operation/math.h6
-rw-r--r--test.cc5
2 files changed, 7 insertions, 4 deletions
diff --git a/src/operation/math.h b/src/operation/math.h
index fd6e031..b06eb35 100644
--- a/src/operation/math.h
+++ b/src/operation/math.h
@@ -41,6 +41,12 @@ using Divide = typename std::integral_constant<
X::value / Y::value
>::type;
+template <typename X>
+using Even = Boolean<(X::value % 2 == 0)>;
+
+template <typename X>
+using Odd = Boolean<!Even<X>::value>;
+
}
#endif // TYPEASVALUE_SRC_OPERATION_MATH_H_
diff --git a/test.cc b/test.cc
index 35126fb..aa98be9 100644
--- a/test.cc
+++ b/test.cc
@@ -14,9 +14,6 @@ class TypeAsValueTest : public ::testing::Test { };
template <typename Element>
using quadruple = tav::Multiply<tav::Int<4>, Element>;
-template <typename Element>
-using odd = tav::Boolean<(Element::value % 2 == 1)>;
-
TEST_F(TypeAsValueTest, BasicMath) {
// (+ 1 2)
EXPECT_EQ(3, ( tav::Add<tav::Int<1>, tav::Int<2>>::value ));
@@ -104,7 +101,7 @@ TEST_F(TypeAsValueTest, ListMap) {
TEST_F(TypeAsValueTest, ListFilter) {
// (filter odd (list 1 2 3))
- EXPECT_TRUE(( std::is_same<tav::List<tav::Int<1>, tav::Int<3>>::type, tav::Filter<odd, tav::List<tav::Int<1>, tav::Int<2>, tav::Int<3>>::type>::type>::value ));
+ EXPECT_TRUE(( std::is_same<tav::List<tav::Int<1>, tav::Int<3>>::type, tav::Filter<tav::Odd, tav::List<tav::Int<1>, tav::Int<2>, tav::Int<3>>::type>::type>::value ));
}
TEST_F(TypeAsValueTest, ListReverse) {