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ff37ccc570
Deserializer.
There were issues with Visual C++ barfing when instantiating
SerializeTrait<T> when "T" was an abstract class AND
SerializeTrait<T>::ReadVal was *never* called:
template <typename T>
struct SerializeTrait {
<SNIP>
static inline T ReadVal(Deserializer& D) { T::ReadVal(D); }
<SNIP>
};
Visual C++ would complain about "T" being an abstract class, even
though ReadVal was never instantiated (although one of the other
member functions were).
Removing this from the trait is not a big deal. It was used hardly
ever, and users who want "read-by-value" deserialization can simply
call the appropriate methods directly instead of relying on
trait-based-dispatch. The trait dispatch for
serialization/deserialization is simply sugar in many cases (like this
one).
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43624 91177308-0d34-0410-b5e6-96231b3b80d8
59 lines
2.4 KiB
C++
59 lines
2.4 KiB
C++
//==- Serialization.h - Generic Object Serialization to Bitcode ---*- C++ -*-=//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by Ted Kremenek and is distributed under the
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// University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines traits for primitive types used for both object
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// serialization and deserialization.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_BITCODE_SERIALIZE
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#define LLVM_BITCODE_SERIALIZE
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#include "llvm/Bitcode/SerializationFwd.h"
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namespace llvm {
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/// SerializeTrait - SerializeTrait bridges between the Serializer/Deserializer
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/// and the functions that serialize objects of specific types. The default
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/// behavior is to call static methods of the class for the object being
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/// serialized, but this behavior can be changed by specializing this
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/// template. Classes only need to implement the methods corresponding
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/// to the serialization scheme they want to support. For example, "Read"
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/// and "ReadVal" correspond to different deserialization schemes which make
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/// sense for different types; a class need only implement one of them.
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/// Serialization and deserialization of pointers are specially handled
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/// by the Serializer and Deserializer using the EmitOwnedPtr, etc. methods.
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/// To serialize the actual object referred to by a pointer, the class
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/// of the object either must implement the methods called by the default
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/// behavior of SerializeTrait, or specialize SerializeTrait. This latter
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/// is useful when one cannot add methods to an existing class (for example).
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template <typename T>
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struct SerializeTrait {
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static inline void Emit(Serializer& S, const T& X) { X.Emit(S); }
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static inline void Read(Deserializer& D, T& X) { X.Read(D); }
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static inline T* Materialize(Deserializer& D) { return T::Materialize(D); }
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};
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#define SERIALIZE_INT_TRAIT(TYPE)\
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template <> struct SerializeTrait<TYPE> {\
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static void Emit(Serializer& S, TYPE X);\
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static void Read(Deserializer& S, TYPE& X); };
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SERIALIZE_INT_TRAIT(bool)
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SERIALIZE_INT_TRAIT(unsigned char)
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SERIALIZE_INT_TRAIT(unsigned short)
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SERIALIZE_INT_TRAIT(unsigned int)
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SERIALIZE_INT_TRAIT(unsigned long)
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#undef SERIALIZE_INT_TRAIT
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} // end namespace llvm
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#endif
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