package main

import (
)

type PathParamsConstraint interface {
        type map[string]string, []struct{key, value string}
}

type PathParams(type T PathParamsConstraint) struct {
	t T
}

func NewPathParams(type T PathParamsConstraint)(t T) *PathParams(T) {
	return &PathParams(T){
		t: t,
	}
}

func (pp *PathParams(T)) Blank() bool {
	return len(pp.t) == 0
}

func (pp *PathParams(T)) IsNil() bool {
	return pp.t == nil // this line doesn't compile
	// cannot compare pp.t == nil (operator == not defined for T)
}

func main() {
}