HLSL: Recognize types declared as identifiers as identifiers.

E.g., in

    float float;
    (float) * float;

The "(float)" is not a type cast, it is an expression.

Test/hlsl.type.identifier.frag

@@ -25,6 +25,7 @@ float4 main() : SV_Target0
     float = float + int + uint + min16float + min10float + (bool[0] ? int : float) + fn(float);
 
     half2x3 half2x3;
+    half2x3._11 = (float) * float;
 
     return float + half2x3._11;
 }