// Ensure that GLSL type aliases compile without error
float f;
int i;
bool b;

vec4 main(vec2 coords) {
    vec4  fv =  vec4( vec3( vec2(f), f), f);
    ivec4 iv = ivec4(ivec3(ivec2(i), i), i);
    bvec4 bv = bvec4(bvec3(bvec2(b), b), b);

    mat4 m = mat4(mat3(mat2(f)));

    return fv;
}