diff options
Diffstat (limited to 'src/google/protobuf/compiler/cpp/cpp_field.h')
| -rw-r--r-- | src/google/protobuf/compiler/cpp/cpp_field.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/google/protobuf/compiler/cpp/cpp_field.h b/src/google/protobuf/compiler/cpp/cpp_field.h index cd2b6b75..1d7f8233 100644 --- a/src/google/protobuf/compiler/cpp/cpp_field.h +++ b/src/google/protobuf/compiler/cpp/cpp_field.h @@ -82,12 +82,38 @@ class FieldGenerator { // implementation is empty. virtual void GenerateStaticMembers(io::Printer* /*printer*/) const {} + // Generate prototypes for accessors that will manipulate imported + // messages inline. These are for .proto.h headers. + // + // In .proto.h mode, the headers of imports are not #included. However, + // functions that manipulate the imported message types need access to + // the class definition of the imported message, meaning that the headers + // must be #included. To get around this, functions that manipulate + // imported message objects are defined as dependent functions in a base + // template class. By making them dependent template functions, the + // function templates will not be instantiated until they are called, so + // we can defer to those translation units to #include the necessary + // generated headers. + // + // See: + // http://en.cppreference.com/w/cpp/language/class_template#Implicit_instantiation + // + // Most field types don't need this, so the default implementation is empty. + virtual void GenerateDependentAccessorDeclarations( + io::Printer* printer) const {} + // 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 depenent accessor functions for this field. + // These are placed inside the header after all class definitions. + virtual void GenerateDependentInlineAccessorDefinitions( + io::Printer* printer) const {} + // Generate inline definitions of accessor functions for this field. // These are placed inside the header after all class definitions. + // In non-.proto.h mode, this generates dependent accessor functions as well. virtual void GenerateInlineAccessorDefinitions( io::Printer* printer, bool is_inline) const = 0; |