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Diffstat (limited to 'src/google/protobuf/compiler/cpp/cpp_field.h')
-rw-r--r-- | src/google/protobuf/compiler/cpp/cpp_field.h | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/src/google/protobuf/compiler/cpp/cpp_field.h b/src/google/protobuf/compiler/cpp/cpp_field.h new file mode 100644 index 00000000..d37eb962 --- /dev/null +++ b/src/google/protobuf/compiler/cpp/cpp_field.h @@ -0,0 +1,127 @@ +// Protocol Buffers - Google's data interchange format +// Copyright 2008 Google Inc. +// http://code.google.com/p/protobuf/ +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +// Author: kenton@google.com (Kenton Varda) +// Based on original Protocol Buffers design by +// Sanjay Ghemawat, Jeff Dean, and others. + +#ifndef GOOGLE_PROTOBUF_COMPILER_CPP_FIELD_H__ +#define GOOGLE_PROTOBUF_COMPILER_CPP_FIELD_H__ + +#include <google/protobuf/stubs/common.h> +#include <google/protobuf/descriptor.h> + +namespace google { +namespace protobuf { + namespace io { + class Printer; // printer.h + } +} + +namespace protobuf { +namespace compiler { +namespace cpp { + +class FieldGenerator { + public: + FieldGenerator() {} + virtual ~FieldGenerator(); + + // Generate lines of code declaring members fields of the message class + // needed to represent this field. These are placed inside the message + // class. + virtual void GeneratePrivateMembers(io::Printer* printer) const = 0; + + // Generate prototypes for all of the accessor functions related to this + // field. These are placed inside the class definition. + virtual void GenerateAccessorDeclarations(io::Printer* printer) const = 0; + + // Generate inline definitions of accessor functions for this field. + // These are placed inside the header after all class definitions. + virtual void GenerateInlineAccessorDefinitions( + io::Printer* printer) const = 0; + + // Generate definitions of accessors that aren't inlined. These are + // placed somewhere in the .cc file. + // Most field types don't need this, so the default implementation is empty. + virtual void GenerateNonInlineAccessorDefinitions( + io::Printer* printer) const {} + + // Generate lines of code (statements, not declarations) which clear the + // field. This is used to define the clear_$name$() method as well as + // the Clear() method for the whole message. + virtual void GenerateClearingCode(io::Printer* printer) const = 0; + + // Generate lines of code (statements, not declarations) which merges the + // contents of the field from the current message to the target message, + // which is stored in the generated code variable "from". + // This is used to fill in the MergeFrom method for the whole message. + // Details of this usage can be found in message.cc under the + // GenerateMergeFrom method. + virtual void GenerateMergingCode(io::Printer* printer) const = 0; + + // Generate any initializers needed for the private members declared by + // GeneratePrivateMembers(). These go into the message class's + // constructor's initializer list. For each initializer, this method + // must print the comma and newline separating it from the *previous* + // initializer, not the *next* initailizer. That is, print a ",\n" first, + // e.g.: + // printer->Print(",\n$name$_($default$)"); + virtual void GenerateInitializer(io::Printer* printer) const = 0; + + // Generate any code that needs to go in the class's destructor. + // Most field types don't need this, so the default implementation is empty. + virtual void GenerateDestructorCode(io::Printer* printer) const {} + + // Generate lines to decode this field, which will be placed inside the + // message's MergeFromCodedStream() method. + virtual void GenerateMergeFromCodedStream(io::Printer* printer) const = 0; + + // Generate lines to serialize this field, which are placed within the + // message's SerializeWithCachedSizes() method. + virtual void GenerateSerializeWithCachedSizes(io::Printer* printer) const = 0; + + // Generate lines to compute the serialized size of this field, which + // are placed in the message's ByteSize() method. + virtual void GenerateByteSize(io::Printer* printer) const = 0; + + private: + GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(FieldGenerator); +}; + +// Convenience class which constructs FieldGenerators for a Descriptor. +class FieldGeneratorMap { + public: + explicit FieldGeneratorMap(const Descriptor* descriptor); + ~FieldGeneratorMap(); + + const FieldGenerator& get(const FieldDescriptor* field) const; + + private: + const Descriptor* descriptor_; + scoped_array<scoped_ptr<FieldGenerator> > field_generators_; + + static FieldGenerator* MakeGenerator(const FieldDescriptor* field); + + GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(FieldGeneratorMap); +}; + +} // namespace cpp +} // namespace compiler +} // namespace protobuf + +} // namespace google +#endif // GOOGLE_PROTOBUF_COMPILER_CPP_FIELD_H__ |