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tutorials: CoreTutorial fixed

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git-svn-id: svn://ultimatepp.org/upp/trunk@15623 f0d560ea-af0d-0410-9eb7-867de7ffcac7
This commit is contained in:
cxl 2020-12-28 10:22:37 +00:00
parent ac0671785d
commit 0228e59631
1 changed files with 25 additions and 3 deletions
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28
tutorial/CoreTutorial/Value2.cpp
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@ -1,5 +1,29 @@
#include "Tutorial.h"
struct Foo : ValueType<Foo, 10010> {
int x;
Foo(const Nuller&) { x = Null; }
Foo(int x) : x(x) {}
Foo() {}
// We provide these methods to allow automatic conversion of Foo to/from Value
operator Value() const { return RichToValue(*this); }
Foo(const Value& v) { *this = v.Get<Foo>(); }
String ToString() const { return AsString(x); }
unsigned GetHashValue() const { return x; }
void Serialize(Stream& s) { s % x; }
bool operator==(const Foo& b) const { return x == b.x; }
bool IsNullInstance() const { return IsNull(x); }
int Compare(const Foo& b) const { return SgnCompare(x, b.x); }
// This type does not define XML nor Json serialization
};
INITBLOCK { // This has to be at file level scope
Value::Register<Foo>(); // need to register value type integer id to allow serialization
}
void Value2Tutorial()
{
/// .Client types and `Value`, `RawValue`, `RichValue`
@ -33,6 +57,7 @@ void Value2Tutorial()
/// support for these operations via template function specializations or (perhaps more
/// convenient) using defined methods and inheriting from `ValueType` base class template:
#if 0
struct Foo : ValueType<Foo, 10010> {
int x;
@ -53,11 +78,8 @@ void Value2Tutorial()
// This type does not define XML nor Json serialization
};
#if 0
INITBLOCK { // This has to be at file level scope
#endif
Value::Register<Foo>(); // need to register value type integer id to allow serialization
#if 0
}
#endif