total rewrite to interface handling; not complete but it compiles

generate/testdata/QueryWithInput.graphql.go

@@ -1,19 +1,47 @@
-type Response struct {
-	User *struct {
-		Id string `json:"id"`
-	} `json:"user"`
-}
+package test
 
-type role string
+// Code generated by github.com/Khan/genql, DO NOT EDIT.
 
-const (
-	studentRole role = "STUDENT"
-	teacherRole role = "TEACHER"
+import (
+	"context"
+
+	"github.com/Khan/genql/graphql"
 )
 
-type userQueryInput struct {
+type QueryWithInputResponse struct {
+	User *User `json:"user"`
+}
+
+type Role string
+
+const (
+	StudentRole Role = "STUDENT"
+	TeacherRole Role = "TEACHER"
+)
+
+type User struct {
+	Id string `json:"id"`
+}
+
+type UserQueryInput struct {
 	Email *string `json:"email"`
 	Name  *string `json:"name"`
 	Id    *string `json:"id"`
-	Role  *role   `json:"role"`
-}
+	Role  *Role   `json:"role"`
+}
+
+func QueryWithInput(client *graphql.Client, query *UserQueryInput) (*QueryWithInputResponse, error) {
+	variables := map[string]interface{}{
+		"query": query,
+	}
+
+	var retval QueryWithInputResponse
+	err := client.MakeRequest(context.Background(), `
+query QueryWithInput ($query: UserQueryInput) {
+	user(query: $query) {
+		id
+	}
+}
+`, &retval, variables)
+	return &retval, err
+}