isfinite function

headers/vmath.hpp/vmath_fun.hpp

@@ -123,8 +123,9 @@ namespace vmath_hpp
 
     using ::std::isnan;
     using ::std::isinf;
-    using ::std::fma;
+    using ::std::isfinite;
 
+    using ::std::fma;
     using ::std::frexp;
     using ::std::ldexp;
 }

headers/vmath.hpp/vmath_vec_fun.hpp

@@ -511,6 +511,11 @@ namespace vmath_hpp
         return map([](T x) { return isinf(x); }, xs);
     }
 
+    template < typename T, std::size_t Size >
+    vec<bool, Size> isfinite(const vec<T, Size>& xs) {
+        return map([](T x) { return isfinite(x); }, xs);
+    }
+
     template < typename T, std::size_t Size >
     vec<T, Size> fma(const vec<T, Size>& as, const vec<T, Size>& bs, const vec<T, Size>& cs) {
         return zip([](T a, T b, T c) { return fma(a, b, c); }, as, bs, cs);

untests/vmath_fun_tests.cpp

@@ -99,6 +99,7 @@ TEST_CASE("vmath/fun") {
 
         REQUIRE_FALSE(isnan(1.f));
         REQUIRE_FALSE(isinf(1.f));
+        REQUIRE(isfinite(1.f));
 
         REQUIRE(fma(2.f, 3.f, 4.f) == approx(10.f));
 

untests/vmath_vec_fun_tests.cpp

@@ -147,6 +147,7 @@ TEST_CASE("vmath/vec_fun") {
 
         REQUIRE_FALSE(isnan(vec2f(1.f)).x);
         REQUIRE_FALSE(isinf(vec2f(1.f)).x);
+        REQUIRE(isfinite(vec2f(1.f)).x);
 
         REQUIRE_FALSE(fma(vec2f(2.f), vec2f(3.f), vec2f(4.f)).x == Approx(12.f));