message IntType {
	optional int32 a_i32 = 1;
	optional int64 b_i64 = 2;
	optional sint32 c_s32 = 3;
	optional sint64 d_s64 = 4;
	optional sfixed32 e_sf32 = 5;
	optional sfixed64 f_sf64 = 6;
}

message UIntType {
	optional uint32 a_u32 = 1;
	optional uint64 b_u64 = 2;
	optional fixed32 c_f32 = 3;
	optional fixed64 d_f64 = 4;
}

message FType{
	optional float a_f = 1;
	optional double b_d = 2;
	optional bool c_b = 3;
}

message BSType{
	optional string a_s = 1;
	repeated bytes b_bs = 2;
}

//user.proto

syntax="proto2“;
package user;

message User{
    required sfixed64 uid = 1;
    
    enum PhoneType{
        NONE = 1;
        HOME = 2;
        MOBILE = 3;
    }
    
    message PhoneNumber {
        required string number = 1;
        optional PhoneType type = 2 [default = MOBILE];
    }
    
    repeated PhoneNumber phone = 2;
    
    optional sfixed32 age = 3;
}

message Admin {
    required sfixed64 uid = 1;
    optional User.PhoneNumber phone = 2;
}