for in iteration of Enum Type (request from issue #58)

core/math.odin

@@ -20,9 +20,13 @@ Vec2 :: [vector 2]f32;
 Vec3 :: [vector 3]f32;
 Vec4 :: [vector 4]f32;
 
-Mat2 :: [2]Vec2;
-Mat3 :: [3]Vec3;
-Mat4 :: [4]Vec4;
+// Column major
+Mat2 :: [2][2]f32;
+Mat3 :: [3][3]f32;
+Mat4 :: [4][4]f32;
+
+Complex :: complex64;
+Quat    :: quaternion128;
 
 sqrt :: proc(x: f32) -> f32 #foreign __llvm_core "llvm.sqrt.f32";
 sqrt :: proc(x: f64) -> f64 #foreign __llvm_core "llvm.sqrt.f64";
@@ -317,10 +321,10 @@ look_at :: proc(eye, centre, up: Vec3) -> Mat4 {
 
 	m: Mat4;
 
-	m[0] = Vec4{+s.x, +s.y, +s.z, 0};
-	m[1] = Vec4{+u.x, +u.y, +u.z, 0};
-	m[2] = Vec4{-f.x, -f.y, -f.z, 0};
-	m[3] = Vec4{dot(s, eye), dot(u, eye), dot(f, eye), 1};
+	m[0] = [4]f32{+s.x, +s.y, +s.z, 0};
+	m[1] = [4]f32{+u.x, +u.y, +u.z, 0};
+	m[2] = [4]f32{-f.x, -f.y, -f.z, 0};
+	m[3] = [4]f32{dot(s, eye), dot(u, eye), dot(f, eye), 1};
 
 	return m;
 }