pw_log: Mark LogEntry.message as optional

There is a functional and useful difference between a LogEntry having
no message, and an empty one, so use optional correctly to distinguish
those cases.

Change-Id: I8fe19dee374878a997ac0a8c76eb0b844575d9d3
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/97792
Reviewed-by: Keir Mierle <keir@google.com>
Commit-Queue: Scott James Remnant <keybuk@google.com>
1 file changed
tree: b0b870c5c59e31075685603fe13b61fe65189ff4
  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