Cannot do swizzle operations with floating type when it's a typename

Description
cannot use float.xx when float is a templated typename

Steps to Reproduce
Reproduced in this godbolt snippet: https://godbolt.org/z/KeYcTozYh

-T ps_6_0 -E PSMain

struct PSInput
{
    float4 position : SV_Position;
    float4 color    : COLOR0;
};

template<typename float_t>
struct StyleClipper
{
    using float_t2 = vector<float_t, 2>;
    static float_t2 func(float_t t)
    {
        return t.xx;
    }
};

float4 PSMain(PSInput input) : SV_TARGET
{
	return input.color + StyleClipper<float>::func(input.color.x).x;
}

Actual Behavior
Changing static float_t2 func(float_t t) to static float_t2 func(float t) will compile successfuly when the input param not a template typename float_t

Environment

• Godbolt DXC Trunk

Start by compiling the provided Godbolt HLSL reproducer with DXC using the shown shader model and entry point. Trace how templated typename parameters are handled for floating-point swizzle expressions; done means the reproducer compiles with the templated parameter as it does when the parameter is declared as float.