new feature: handle different param types in the exact same path pattern

implements https://github.com/kataras/iris/issues/1315


Former-commit-id: 3e9276f2a95d6fc7c10fbf91186d041dcba72611

core/router/api_builder.go

@@ -10,6 +10,7 @@ import (
 	"github.com/kataras/iris/context"
 	"github.com/kataras/iris/core/errors"
 	"github.com/kataras/iris/macro"
+	macroHandler "github.com/kataras/iris/macro/handler"
 )
 
 // MethodNone is a Virtual method
@@ -109,6 +110,20 @@ func (repo *repository) get(routeName string) *Route {
 	return nil
 }
 
+func (repo *repository) getRelative(r *Route) *Route {
+	if r.tmpl.IsTrailing() || !macroHandler.CanMakeHandler(r.tmpl) {
+		return nil
+	}
+
+	for _, route := range repo.routes {
+		if r.Subdomain == route.Subdomain && r.Method == route.Method && r.FormattedPath == route.FormattedPath && !route.tmpl.IsTrailing() {
+			return route
+		}
+	}
+
+	return nil
+}
+
 func (repo *repository) getByPath(tmplPath string) *Route {
 	if repo.pos != nil {
 		if idx, ok := repo.pos[tmplPath]; ok {
@@ -345,6 +360,8 @@ func (api *APIBuilder) Handle(method string, relativePath string, handlers ...co
 	var route *Route // the last one is returned.
 	for _, route = range routes {
 		// global
+
+		route.topLink = api.routes.getRelative(route)
 		api.routes.register(route)
 	}