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Add cpp_vec_type attribute for object API vector customization

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Mirrors cpp_str_type and cpp_ptr_type: a per-field cpp_vec_type attribute
lets users substitute any std::vector-compatible container in generated
T-structs, and --cpp-vec-type sets the global default.

NativeVector() resolves the attribute (falling back to the global option,
then std::vector). Changes applied to GenTypeNative, GenMember, GenParam
(CreateDirect), and the CreateVectorOfStrings fast-path guard.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Romain BOULLARD
2026-05-09 19:55:26 +02:00
parent 9e9f5bbfcf
commit 35665b5ae7
8 changed files with 113 additions and 7 deletions
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include/flatbuffers/idl.h
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@@ -676,6 +676,7 @@ struct IDLOptions {
bool gen_absl_hash;
std::string cpp_object_api_pointer_type;
std::string cpp_object_api_string_type;
std::string cpp_object_api_vector_type;
bool cpp_object_api_string_flexible_constructor;
CaseStyle cpp_object_api_field_case_style;
bool cpp_direct_copy;
@@ -1012,6 +1013,7 @@ class Parser : public ParserState {
known_attributes_["cpp_ptr_type_get"] = true;
known_attributes_["cpp_str_type"] = true;
known_attributes_["cpp_str_flex_ctor"] = true;
known_attributes_["cpp_vec_type"] = true;
known_attributes_["native_inline"] = true;
known_attributes_["native_custom_alloc"] = true;
known_attributes_["native_type"] = true;