J. Nick Koston bfc5a210bc [core] Replace std::function with lightweight Callback in CallbackManager ...

Replace std::function with a lightweight type-erased Callback struct
(8 bytes on 32-bit vs 16 for std::function) in CallbackManager and
LazyCallbackManager. Using C++20 if constexpr, small trivially-copyable
callables like [this] lambdas (81% of all callback registrations) are
stored inline in the function pointer context without heap allocation.

This eliminates std::function null checks (and __throw_bad_function_call)
from all entity callback paths, and templatizes add_on_*_callback methods
across all entity types so lambdas flow through without being wrapped in
std::function first.

Also converts EntityStateBase from hand-rolled nullable CallbackManager
pointers to LazyCallbackManager for consistency.

Measured flash savings:
- ESP8266 simple:        -160 B
- ESP8266 ratgdo:        -592 B
- ESP32 IDF (large):     -456 B
- ESP32 IDF (minimal):   -212 B

2026-03-15 22:20:42 -10:00

..

__init__.py

[core] Pack entity string properties into PROGMEM-indexed uint8_t fields (#14171)

2026-03-03 07:03:24 -10:00

automation.h

[text] Use C++17 nested namespace syntax (#14242)

2026-02-23 20:49:25 -05:00

text_call.cpp

[web_server] Avoid temporary std::string allocations in request parameter parsing (#14366)

2026-03-02 06:57:39 -10:00

text_call.h

[web_server] Avoid temporary std::string allocations in request parameter parsing (#14366)

2026-03-02 06:57:39 -10:00

text_traits.h

[text] Use C++17 nested namespace syntax (#14242)

2026-02-23 20:49:25 -05:00

text.cpp

[core] Replace std::function with lightweight Callback in CallbackManager

2026-03-15 22:20:42 -10:00

text.h

[core] Replace std::function with lightweight Callback in CallbackManager

2026-03-15 22:20:42 -10:00