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| author | Pieter Wuille <pieter.wuille@gmail.com> | 2017-07-07 16:06:56 -0700 |
|---|---|---|
| committer | Pieter Wuille <pieter.wuille@gmail.com> | 2018-03-20 17:08:06 -0700 |
| commit | 818dc74ba2745872fd68d2158380fc8bd331210e (patch) | |
| tree | f72178344d09e88a312da73abed27f1716b8cfdd /src/serialize.h | |
| parent | 8ee5c7b747171e335793c74cd9d2f7491da58164 (diff) | |
| download | bitcoin-818dc74ba2745872fd68d2158380fc8bd331210e.tar.xz | |
Support serialization as another type without casting
This adds a READWRITEAS(type, obj) macro which serializes obj as if it
were casted to (const type&) when const, and to (type&) when non-const.
This makes it usable in serialization code that uses a single
implementation for both serialization and deserializing, which doesn't
know the constness of the object involved.
Diffstat (limited to 'src/serialize.h')
| -rw-r--r-- | src/serialize.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/serialize.h b/src/serialize.h index 91da6b0f80..341a138e8b 100644 --- a/src/serialize.h +++ b/src/serialize.h @@ -148,7 +148,12 @@ enum SER_GETHASH = (1 << 2), }; -#define READWRITE(...) (::SerReadWriteMany(s, ser_action, __VA_ARGS__)) +//! Convert the reference base type to X, without changing constness or reference type. +template<typename X> X& ReadWriteAsHelper(X& x) { return x; } +template<typename X> const X& ReadWriteAsHelper(const X& x) { return x; } + +#define READWRITE(...) (::SerReadWriteMany(s, ser_action, __VA_ARGS__)) +#define READWRITEAS(type, obj) (::SerReadWriteMany(s, ser_action, ReadWriteAsHelper<type>(obj))) /** * Implement three methods for serializable objects. These are actually wrappers over |