pw_protobuf: Support proto3 optional fields

When a proto3 field is labelled as an optional, wrap the struct Message
type with std::optional<> to support presence.

Bug: pwbug/652
Change-Id: I328e1d0b1d534b732a8d4690305975b46579f014
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/91904
Reviewed-by: Armando Montanez <amontanez@google.com>
Pigweed-Auto-Submit: Scott James Remnant <keybuk@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed.google.com.iam.gserviceaccount.com>
11 files changed
tree: aeb4018037450de00508254271e3c07b8f630f35
  1. build_overrides/
  2. docker/
  3. docs/
  4. pw_allocator/
  5. pw_analog/
  6. pw_android_toolchain/
  7. pw_arduino_build/
  8. pw_assert/
  9. pw_assert_basic/
  10. pw_assert_log/
  11. pw_assert_tokenized/
  12. pw_assert_zephyr/
  13. pw_base64/
  14. pw_bloat/
  15. pw_blob_store/
  16. pw_bluetooth_hci/
  17. pw_boot/
  18. pw_boot_cortex_m/
  19. pw_build/
  20. pw_build_info/
  21. pw_build_mcuxpresso/
  22. pw_bytes/
  23. pw_checksum/
  24. pw_chrono/
  25. pw_chrono_embos/
  26. pw_chrono_freertos/
  27. pw_chrono_stl/
  28. pw_chrono_threadx/
  29. pw_chrono_zephyr/
  30. pw_cli/
  31. pw_console/
  32. pw_containers/
  33. pw_cpu_exception/
  34. pw_cpu_exception_cortex_m/
  35. pw_crypto/
  36. pw_docgen/
  37. pw_doctor/
  38. pw_env_setup/
  39. pw_file/
  40. pw_function/
  41. pw_fuzzer/
  42. pw_hdlc/
  43. pw_hex_dump/
  44. pw_i2c/
  45. pw_i2c_mcuxpresso/
  46. pw_interrupt/
  47. pw_interrupt_cortex_m/
  48. pw_interrupt_zephyr/
  49. pw_kvs/
  50. pw_libc/
  51. pw_log/
  52. pw_log_android/
  53. pw_log_basic/
  54. pw_log_null/
  55. pw_log_rpc/
  56. pw_log_string/
  57. pw_log_tokenized/
  58. pw_log_zephyr/
  59. pw_malloc/
  60. pw_malloc_freelist/
  61. pw_metric/
  62. pw_minimal_cpp_stdlib/
  63. pw_module/
  64. pw_multisink/
  65. pw_package/
  66. pw_persistent_ram/
  67. pw_polyfill/
  68. pw_preprocessor/
  69. pw_presubmit/
  70. pw_protobuf/
  71. pw_protobuf_compiler/
  72. pw_random/
  73. pw_result/
  74. pw_ring_buffer/
  75. pw_router/
  76. pw_rpc/
  77. pw_snapshot/
  78. pw_software_update/
  79. pw_span/
  80. pw_spi/
  81. pw_status/
  82. pw_stm32cube_build/
  83. pw_stream/
  84. pw_string/
  85. pw_symbolizer/
  86. pw_sync/
  87. pw_sync_baremetal/
  88. pw_sync_embos/
  89. pw_sync_freertos/
  90. pw_sync_stl/
  91. pw_sync_threadx/
  92. pw_sync_zephyr/
  93. pw_sys_io/
  94. pw_sys_io_arduino/
  95. pw_sys_io_baremetal_lm3s6965evb/
  96. pw_sys_io_baremetal_stm32f429/
  97. pw_sys_io_emcraft_sf2/
  98. pw_sys_io_mcuxpresso/
  99. pw_sys_io_stdio/
  100. pw_sys_io_stm32cube/
  101. pw_sys_io_zephyr/
  102. pw_system/
  103. pw_target_runner/
  104. pw_thread/
  105. pw_thread_embos/
  106. pw_thread_freertos/
  107. pw_thread_stl/
  108. pw_thread_threadx/
  109. pw_tls_client/
  110. pw_tls_client_boringssl/
  111. pw_tls_client_mbedtls/
  112. pw_tokenizer/
  113. pw_tool/
  114. pw_toolchain/
  115. pw_trace/
  116. pw_trace_tokenized/
  117. pw_transfer/
  118. pw_unit_test/
  119. pw_varint/
  120. pw_watch/
  121. pw_web_ui/
  122. pw_work_queue/
  123. targets/
  124. third_party/
  125. zephyr/
  126. .bazelignore
  127. .bazelrc
  128. .clang-format
  129. .clang-tidy
  130. .eslintrc.json
  131. .gitattributes
  132. .gitignore
  133. .gn
  134. .prettierrc.js
  135. .pylintrc
  136. activate.bat
  137. Android.bp
  138. AUTHORS
  139. bootstrap.bat
  140. bootstrap.sh
  141. BUILD.bazel
  142. BUILD.gn
  143. BUILDCONFIG.gn
  144. CMakeLists.txt
  145. Kconfig.zephyr
  146. LICENSE
  147. modules.gni
  148. OWNERS
  149. package.json
  150. PIGWEED_MODULES
  151. PW_PLUGINS
  152. README.md
  153. tsconfig.json
  154. WORKSPACE
  155. yarn.lock
README.md

Pigweed

Pigweed is an open source collection of embedded-targeted libraries–or as we like to call them, modules. These modules are building blocks and infrastructure that enable faster and more reliable development on small-footprint MMU-less 32-bit microcontrollers like the STMicroelectronics STM32L452 or the Nordic nRF52832.

For more information please see our website: https://pigweed.dev/

Links